10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2023

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ____to____

Commission file number 0-14384

BANCFIRST CORPORATION

(Exact name of registrant as specified in its charter)

oklahoma	73-1221379
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

100 N. Broadway Ave., Oklahoma City, Oklahoma 73102

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (405) 270-1086

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $1.00 Par Value Per Share	BANF	NASDAQ Global Select Market System

Securities registered pursuant to Section 12(g) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
7.2% Cumulative Trust Preferred Securities	BANFP	NASDAQ Global Select Market System

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined by Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

The aggregate market value of the Common Stock held by nonaffiliates of the registrant computed using the last sale price on June 30, 2023 was approximately $1,879,822,752. As of January 31, 2024, there were 32,936,410 shares of Common Stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE:

Portions of the Proxy Statement for the 2024 Annual Meeting of Stockholders of the registrant (the “2024 Proxy Statement”) to be filed pursuant to Regulation 14A are incorporated by reference into Part III of this report.

BANCFIRST CORPORATION

ANNUAL REPORT ON FORM 10-K

TABLE OF CONTENTS

Item		Page
	PART I
1.	Business	2
1A.	Risk Factors	16
1B.	Unresolved Staff Comments	24
1C.	Cybersecurity	25
2.	Properties	26
3.	Legal Proceedings	26
4.	Mine Safety Disclosures	26
	PART II
5.	Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	27
6.	Reserved	27
7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	28
7A.	Quantitative and Qualitative Disclosures about Market Risk	49
8.	Financial Statements and Supplementary Data	50
9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	104
9A.	Controls and Procedures	104
9B.	Other Information	107
9C.	Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	107
	PART III
10.	Directors, Executive Officers and Corporate Governance	107
11.	Executive Compensation	107
12.	Security Ownership of Certain Beneficial Owners and Management	107
13.	Certain Relationships and Related Transactions, and Director Independence	107
14.	Principal Accountant Fees and Services	107
	PART IV
15.	Exhibits and Financial Statement Schedules	108
Signatures		111

PART I

Item 1. Business.

General

BancFirst Corporation (the “Company”) is a financial holding company headquartered in Oklahoma City, Oklahoma and registered under the Bank Holding Company Act of 1956, as amended (the “BHC Act”). It conducts a vast majority of its operating activities through its wholly-owned subsidiary, BancFirst (“BancFirst”), an Oklahoma state-chartered bank headquartered in Oklahoma City, Oklahoma. The Company also conducts operating activities through its wholly-owned subsidiaries, Pegasus Bank (“Pegasus”), a Texas state-chartered bank headquartered in Dallas, Texas and Worthington Bank ("Worthington"), a Texas state-chartered bank headquartered in Arlington, Texas. In addition, the Company owns 100% of the common securities of BFC Capital Trust II (a Delaware business trust), 100% of Council Oak Partners LLC, an Oklahoma limited liability company engaging in investing activities and 100% of BancFirst Insurance Services, Inc., an Oklahoma business corporation operating as an independent insurance agency.

The Company was incorporated as United Community Corporation in July 1984 to become a bank holding company. In June 1985, it merged with seven Oklahoma bank holding companies that had operated under common ownership and the Company has conducted business as a bank holding company since that time. Over the next several years, the Company acquired additional banks and bank holding companies, and in November 1988, the Company changed its name to BancFirst Corporation. Effective April 1, 1989, the Company consolidated its 12 subsidiary banks and formed BancFirst. Over the intervening decades, the Company has continued to expand through acquisitions and de-novo branches. BancFirst currently has 106 banking locations serving 59 communities throughout Oklahoma, Pegasus has 3 banking locations in the Dallas Metroplex area and Worthington has 5 locations in the Dallas-Fort Worth Metroplex area.

BancFirst’s strategy focuses on providing a full range of commercial banking services to retail customers and small to medium-sized businesses in both the non-metropolitan trade centers and cities in the metropolitan statistical areas of Oklahoma. BancFirst operates as a “super community bank”, managing its community banking offices on a decentralized basis, which permits them to be responsive to local customer needs. Underwriting, funding, customer service and pricing decisions are made by presidents in each market within BancFirst’s strategic parameters. At the same time, BancFirst generally has a larger lending capacity, broader product line and greater operational scale than its principal competitors do in the non-metropolitan market areas (which typically are independently owned community banks). In the metropolitan markets served by BancFirst, the Company’s strategy is to focus on the needs of local businesses that seek more responsive services than are available at larger institutions.

BancFirst maintains a strong community orientation by, among other things, selecting members of the communities in which BancFirst’s branches operate to local consulting boards that assist in marketing and providing feedback on BancFirst’s products and services to meet customer needs. As a result of the development of broad banking relationships with its customers and community branch network, BancFirst’s lending and investing activities are funded almost entirely by core deposits.

BancFirst centralizes virtually all of its processing, support and investment functions in order to achieve consistency and operational efficiencies. BancFirst maintains centralized control functions such as operations support, bookkeeping, accounting, loan review, compliance and internal auditing to ensure effective risk management. BancFirst also provides, on a centralized basis, certain specialized financial services that require unique expertise.

BancFirst provides a wide range of retail and commercial banking services, including: commercial, real estate, energy, agricultural and consumer lending; depository and funds transfer services; collections; safe deposit boxes; cash management services; trust services; and other services tailored for both individual and corporate customers. BancFirst provides item processing, research and other correspondent banking services to financial institutions and governmental units.

BancFirst’s primary lending activity is the financing of business and industry in its market areas. Its commercial loan customers are generally small to medium-sized businesses engaged in light manufacturing, local wholesale and retail trade, commercial and residential real estate development and construction, services, agriculture and the energy industry. Most forms of commercial lending are offered, including commercial mortgages, other forms of asset-based financing and working capital lines of credit. In addition, BancFirst offers Small Business Administration (“SBA”) guaranteed loans through BancFirst Commercial Capital, a division established in 1991.

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Consumer lending activities of BancFirst consist of traditional forms of financing for automobiles, home equity loans and other personal loans. Residential loans consist primarily of home loans in non-metropolitan areas, which are generally shorter in duration than typical mortgages and reprice within five years.

BancFirst’s range of deposit services include checking accounts, Negotiable Order of Withdrawal (“NOW”) accounts, savings accounts, money market accounts, sweep accounts, club accounts, individual retirement accounts and certificates of deposit. Overdraft protection and auto draft services are also offered.

Trust services offered through BancFirst’s Trust and Investment Management Division (the “Trust Division”) consist primarily of investment management and administration of trusts for individuals, corporations and employee benefit plans. In addition, the Trust Division serves as bond trustee and paying agent for various Oklahoma municipalities and governmental entities.

Insurance services offered through BancFirst Insurance Services, Inc. consists of business and personal insurance, employee benefits, surety bonds and claims and risk management.

BancFirst has the following 100% owned principal subsidiaries: BancFirst Agency, Inc., a credit life insurance agency, BFC-PNC, LLC and BF Brazito, LLC, both operating subsidiaries to hold other real estate owned, BFTower, LLC (which owns a 49% ownership interest in SFPG, LLC, a parking garage, and a 50% ownership interest in ParcFirst@Bricktown, LLC, a surface parking lot). All of these companies are Oklahoma entities.

Pegasus and Worthington's lending activities include private banking, commercial and residential real estate, commercial and industrial and energy loans. They each have a full complement of deposit products including sweep accounts and securities investment products. They provide a wide range of banking services to individual and corporate customers and are subject to competition from other local, regional, and national financial institutions.

Human Capital Resources

As of December 31, 2023, the Company employed 2,109 full time equivalent employees. None of its employees are represented by collective bargaining agreements. The Company views its employees as a differentiator, enabling the Company to meet customers’ needs through highly trained and motivated employees. The Company’s approach to human capital resources focuses on objectives that include, but are not limited to, providing fair and equitable compensation, training employees to reach heightened skill sets and standards of motivation, identifying and developing the proficiencies of all employees, and enhancing ongoing diversity, equity, and inclusion initiatives.

The Company recognizes the importance of maintaining a culture of feedback and employee recognition, and asks its supervisors to focus on ensuring that the Company’s employees feel a sense of belonging at work, fostering peer-to-peer connections and appropriate subordinate/supervisor relationships and communications. The Company provides its employees with competitive compensation and benefits packages. The Company encourages its employees to be alert for opportunities to improve quality and efficiency. In addition, the Company affords its employees opportunities to learn how their work fits into the bigger picture and to gain a deeper appreciation for how they are making an impact within and outside the Company. Training resources and educational assistance are readily available, and the Company strives to promote, where practical, from within the Company. The Company identifies high potential candidates and provides specifically tailored plans for actualizing their development goals and career trajectories.

The Company views diversity, equity, and inclusion as a cultural and business imperative that must permeate its culture. By affirmatively recruiting, promoting, and developing an increasingly diverse group of prospective and current employees into managerial roles, the Company works to create a more appealing work environment for attracting and retaining larger numbers of diverse employees. The Company is committed to a policy of consistent treatment and equal employment opportunity in all recruitment and employment practices and is an affirmative action employer.

Climate-Related and Other Environmental, Social and Governance Developments

In recent years, federal, state and international lawmakers and regulators have increased their focus on risk oversight, disclosures and practices in connection with climate change and other environmental, social and governance matters. For example, in March 2022, the SEC issued a proposed rule on the enhancement and standardization of climate-related disclosures for investors. The proposed rule would require public issuers, including us, to significantly expand the scope of climate-related disclosures in their SEC filings and,

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based on the SEC rules hearing agenda, is expected to be adopted in April, 2024. The SEC has also announced plans to propose rules to require enhanced disclosure regarding human capital management and board diversity for public issuers; those rules are, based on the SEC rules hearing agenda, expected to be proposed in April, 2024.

Market Areas and Competition

The banking environment in Oklahoma is very competitive. The geographic dispersion of the BancFirst’s banking locations presents several different levels and types of competition. In general, however, each location competes with other banking institutions, savings and loan associations, brokerage firms, personal loan finance companies and credit unions within their respective market areas. The communities in which BancFirst maintains offices are generally local trade centers throughout Oklahoma. The major areas of competition include interest rates charged on loans, underwriting terms and conditions, interest rates paid on deposits, fees on non-credit services, levels of service charges on deposits, completeness of product lines and quality of service.

Management believes BancFirst is in an advantageous competitive position operating as a “super community bank.” Under this strategy, BancFirst provides a broad line of financial products and services for small to medium-sized businesses and consumers through full service community banking offices with decentralized management, while achieving operating efficiency and product scale through product standardization and centralization of processing and other functions. Each full-service banking office has senior management with significant lending experience who exercise substantial autonomy over credit and pricing decisions. This decentralized management approach, coupled with continuity of service by the same staff members, enables BancFirst to develop long-term customer relationships, maintain high-quality service and respond quickly to customer needs. The majority of its competitors in the non-metropolitan areas are much smaller, and do not offer the range of products and services nor have the lending capacity of BancFirst. In the metropolitan communities, BancFirst’s strategy is to be more responsive to, and more focused on, the needs of local businesses that are not served effectively by larger institutions. As reported by the Federal Deposit Insurance Corporation (“FDIC”), the Company’s market share of deposits within the state of Oklahoma was 6.86% as of June 30, 2023 and 7.19% as of June 30, 2022.

Marketing to existing and potential customers is performed through a variety of media advertising, direct mail and direct personal contacts. BancFirst monitors the needs of its customer base through its Product Development Group, which develops and enhances products and services in response to such needs. Sales, customer service, compliance and product training are coordinated with incentive programs to sell BancFirst’s products and services.

The banking environment in North Texas is one of the most competitive in the nation. Pegasus and Worthington's marketing avoids media campaigns and their growth is dependent on the experience, knowledge and contacts of their relationship officers and directors.

Operating Segments

The Company has six principal business units: BancFirst metropolitan banks, BancFirst community banks, Pegasus, Worthington, other financial services and executive operations and support. For more information on the Company’s Operating Segments, see Note (23), “Segment Information,” to the Company’s Consolidated Financial Statements.

Control of Company

Affiliates of the Company beneficially own approximately 38% of the outstanding shares of the Company’s common stock as of January 31, 2024. Under the Company’s Bylaws, holders of a majority of the outstanding shares of common stock are able to elect all of the directors and approve significant corporate actions, including business combinations. Accordingly, while the Company’s affiliates do not have legal control, i.e., a majority of the outstanding shares of common stock, they have effective control of the Company.

Supervision and Regulation

Banking is a complex, highly regulated industry. The growth and earnings performance of the Company, BancFirst, Pegasus and Worthington can be affected by management decisions, general and local economic conditions, statutes, and the regulations and policies administered by various governmental regulatory authorities. These authorities include, but are not limited to, the Board of Governors of the Federal Reserve System (the “Federal Reserve Board”), the FDIC, the Oklahoma Banking Department and the Texas Department of Banking.

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The primary goals of the bank regulatory framework are to maintain a safe and sound banking system and to facilitate the conduct of monetary policy. This regulatory framework is intended primarily for the protection of a financial institution’s depositors, rather than the institution’s stockholders and creditors. The following discussion describes certain of the material elements of the regulatory framework applicable to bank holding companies and financial holding companies and their subsidiaries and provides certain specific information relevant to the Company, which is both a bank holding company and a financial holding company. The descriptions are qualified in their entirety by reference to the specific statutes and regulations discussed. Further, such statutes, regulations and policies are continually under review by Congress and state legislatures, and federal and state regulatory agencies. A change in statutes, regulations or regulatory policies applicable to the Company, including changes in interpretation or implementation thereof, could have a material effect on the Company’s business.

Regulatory Agencies

In the U.S., banking is regulated at both the federal and state level. Commercial banks in the United States are able to choose to organize as national banks with a charter issued by the Office of the Comptroller of the Currency (“OCC”) or as state banks with a charter issued by a state government. The choice of charter determines which agency will supervise the bank: the primary supervisor of nationally chartered banks is the OCC, whereas state-chartered banks are supervised jointly by their state chartering authority and either the FDIC or the Federal Reserve Board, depending upon whether the state-chartered bank is a member of the Federal Reserve System. BancFirst is chartered by the State of Oklahoma and at the state level is supervised and regulated by the Oklahoma Banking Department under the Oklahoma Banking Code. Pegasus and Worthington are chartered by the State of Texas and at the state level are supervised and regulated by the Texas Department of Banking. On August 11, 2023, BancFirst became a Federal Reserve System member bank, which changed its primary regulator from the FDIC to the Federal Reserve System. Worthington became a Federal Reserve System member bank on September 1, 2023, and Pegasus became a Federal Reserve System member bank on October 12, 2023, which changed their primary regulator from the FDIC to the Federal Reserve System. Their deposits are insured by the Deposit Insurance Fund (“DIF”) of the FDIC to the extent provided by law.

As a financial holding company and a bank holding company, the Company is subject to comprehensive regulation by the Federal Reserve Board under the BHC Act, as amended by the Gramm-Leach-Bliley Act of 1999 (the “GLB Act”), the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”), and other legislation, as well as other federal and state laws governing the banking business. The BHC Act provides generally for regulation of financial holding companies and bank holding companies such as the Company by the Federal Reserve Board, and for functional regulation of banking activities by bank regulators, securities activities by securities regulators, and insurance activities by insurance regulators. Additionally, the Company is under the jurisdiction of the Securities and Exchange Commission (“SEC”) and is subject to the periodic reporting, information, proxy solicitation, insider trading, corporate governance and other restrictions and requirements of the SEC under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The Company’s common stock is listed on the NASDAQ Global Select Market System under the trading symbol “BANF,” and is subject to the listing and marketplace rules of the NASDAQ Stock Market, Inc. (the “NASDAQ”).

The Federal Reserve Board supervises non-banking activities conducted by companies directly and indirectly owned by the Company. In addition, the Company’s non-banking subsidiaries are subject to various other laws, regulations, supervision and examination by other regulatory agencies, all of which directly or indirectly affect the operations and management of the Company and its ability to make distributions to stockholders.

Bank Holding Company and Financial Holding Company Activities

The BHC Act generally limits the activities in which the Company and its non-banking subsidiaries may engage, to managing or controlling banks and to a range of activities that are considered to be closely related to banking. The list of activities permitted by the Federal Reserve Board includes, among other things: lending; operating a savings institution, mortgage company, finance company, credit card company or factoring company; performing certain data processing operations; providing certain investment and financial advice; underwriting and acting as an insurance agent for certain types of credit-related insurance; leasing property on a full-payout, non-operating basis; selling money orders; real estate and personal property appraising; providing tax planning and preparation services; and, subject to certain limitations, providing securities brokerage services for customers. These activities may also be affected by other federal legislation.

Bank holding companies that have elected to be treated as financial holding companies, such as the Company, may engage in a broader range of activities considered "financial in nature."

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“Financial in nature” activities include securities underwriting, dealing and market making, sponsoring mutual funds and investment companies, insurance underwriting and agency, merchant banking and other activities that the Federal Reserve Board, in consultation with the Secretary of the U.S. Treasury, determines from time to time to be financial in nature or incidental to such financial activity or is complementary to a financial activity and does not pose a safety and soundness risk.

To maintain financial holding company status, a financial holding company and all of its depository institution subsidiaries must be “well capitalized” and “well managed.” A depository institution subsidiary is considered “well capitalized” if it satisfies the requirements for this status discussed in the section captioned “Capital Requirements,” included elsewhere in this item. A depository institution subsidiary is considered “well managed” if it received a composite rating and management rating of at least “satisfactory” in its most recent examination. A financial holding company’s status will also depend upon it maintaining its status as “well capitalized” and “well managed” under applicable Federal Reserve Board regulations. If a financial holding company ceases to meet these capital and management requirements, the Federal Reserve Board’s regulations provide that the financial holding company must enter into an agreement with the Federal Reserve Board to comply with all applicable capital and management requirements. Until the financial holding company returns to compliance, the Federal Reserve Board may impose limitations or conditions on the conduct of its activities, and the company may not commence any of the broader financial activities permissible for financial holding companies or acquire a company engaged in such financial activities without prior approval of the Federal Reserve Board. If the company does not return to compliance within 180 days, the Federal Reserve Board may require divestiture of the holding company’s depository institutions. Bank holding companies and banks must also be both well capitalized and well managed in order to acquire banks located outside their home state.

In order for a financial holding company to commence any new activity permitted by the BHC Act or to acquire a company engaged in any new activity permitted by the BHC Act, each insured depository institution subsidiary of the financial holding company must have received a rating of at least “satisfactory” in its most recent examination under the Community Reinvestment Act. See the section captioned “Community Reinvestment Act” included elsewhere in this item.

The Federal Reserve Board has the power to order any bank holding company or its subsidiaries to terminate any activity or to terminate its ownership or control of any subsidiary when the Federal Reserve Board has reasonable grounds to believe that continuation of such activity or such ownership or control constitutes a serious risk to the financial soundness, safety or stability of any bank subsidiary of the bank holding company.

Federal and state laws impose notice and approval requirements for mergers and acquisitions of other depository institutions or bank holding companies. The BHC Act requires the prior approval of the Federal Reserve Board for the direct or indirect acquisition by a bank holding company of more than 5% of the voting shares or substantially all of the assets of a commercial bank or its parent holding company (including a financial holding company). Additionally, under the Bank Merger Act, the prior approval of the Federal Reserve Board or other appropriate bank regulatory authority is required for a bank to merge with another bank, purchase the assets or assume the deposits of another bank. In determining whether to approve a proposed bank acquisition or merger, bank regulatory authorities will consider, among other factors, the competitive effect and public benefits of the transactions, the capital position of the combined organization, the risks to the stability of the U.S. banking or financial system, the applicant’s performance record under the Community Reinvestment Act (see the section captioned “Community Reinvestment Act” included elsewhere in this item) and its compliance with fair housing and other consumer protection laws and the effectiveness of the subject organizations in combating money laundering activities.

Dividend Restrictions

The principal source of the Company’s liquidity is dividends from BancFirst. Various federal and state statutory provisions and regulations limit the amount of dividends the Company’s subsidiary banks and certain other subsidiaries may pay without regulatory approval. The payment of dividends by its subsidiary banks may also be affected by other regulatory requirements and policies, such as the maintenance of adequate capital. If, in the opinion of the applicable regulatory authority, a bank under its jurisdiction is engaged in, or is about to engage in, an unsafe or unsound practice (which, depending on the financial condition of the bank, could include the payment of dividends), such authority may require, after notice and hearing, that such bank cease and desist from such practice. The appropriate federal regulatory authorities have stated that paying dividends that deplete a bank’s capital base to an inadequate level would be an unsafe and unsound banking practice and that banking organizations should generally pay dividends only out of current operating earnings. In addition, in the current financial and economic environment, the Federal Reserve Board has indicated that bank holding companies should carefully review their dividend policy and has discouraged payment ratios that are at maximum allowable levels unless both asset quality and capital are very strong.

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Transactions with Affiliates

The Company, BancFirst, Pegasus and Worthington are deemed affiliates of each other within the meaning of the Federal Reserve Act, and covered transactions between affiliates are subject to certain restrictions, including compliance with Sections 23A and 23B of the Federal Reserve Act and their implementing regulations. These regulations limit the types and amounts of covered transactions engaged in by a financial institution and its affiliates, and generally require those transactions to be on an arm’s-length basis. “Covered transactions” are defined by statute to include a loan or extension of credit, as well as a purchase of securities issued by an affiliate, a purchase of assets (unless otherwise exempted by the Federal Reserve Board) from the affiliate, certain derivative transactions that create a credit exposure to an affiliate, the acceptance of securities issued by the affiliate as collateral for a loan and the issuance of a guarantee, acceptance or letter of credit on behalf of an affiliate. In general, these regulations require that any such transaction by a financial institution with an affiliate must be secured by designated amounts of specified collateral and must be limited to certain thresholds on an individual and aggregate basis.

Federal law also limits a bank’s authority to extend credit to its directors, executive officers and 10% stockholders, as well as to entities controlled by such persons. Among other things, extensions of credit to insiders are required to be made on terms that are substantially the same as, and follow credit underwriting procedures that are not less stringent than, those prevailing for comparable transactions with unaffiliated persons. In addition, the terms of such extensions of credit may not involve more than the normal risk of non-repayment or present other unfavorable features and may not exceed certain limitations on the amount of credit extended to such persons individually and in the aggregate.

Source of Strength

Federal Reserve Board policy requires bank holding companies to act as a source of financial and managerial strength to their subsidiary banks and, under appropriate circumstances, to commit resources to support each such subsidiary bank. This support may be required at times when the bank holding company may not have the resources to provide the support. If a bank holding company was unable to pay mandated assessments in support of its subsidiary banks, the FDIC could order the sale of the bank holding company’s stock in the subsidiary banks to cover the deficiency.

Capital loans by a bank holding company to its subsidiary banks are subordinate in right of payment to deposits and certain other indebtedness of the subsidiary banks. In addition, in the event of a bank holding company’s bankruptcy, any commitment by the bank holding company to a federal bank regulatory agency to maintain the capital of its subsidiary banks will be assumed by the bankruptcy trustee and entitled to priority of payment.

Capital Requirements

The Company, BancFirst, Pegasus and Worthington are each required to comply with applicable capital adequacy standards established by the Federal Reserve Board and the FDIC. The current risk-based capital standards applicable to the Company, BancFirst, Pegasus and Worthington are based on the Basel III Capital Rules established by the Basel Committee on Banking Supervision (the “Basel Committee”). The Basel Committee is a committee of central banks and bank supervisors/regulators from the major industrialized countries that develops broad policy guidelines for use by each country’s supervisors in determining the supervisory policies they apply. The requirements are intended to ensure that banking organizations have adequate capital given the risk levels of assets and off-balance sheet financial instruments.

As an additional means to identify problems in the financial management of depository institutions, the Federal Deposit Insurance Act (the “FDI Act”) requires federal bank regulatory agencies to establish certain non-capital safety and soundness standards for institutions for which they are the primary federal regulator. The standards relate generally to operations and management, asset quality, interest rate exposure and executive compensation. The agencies are authorized to take action against institutions that fail to meet such standards.

The Basel III Capital Rules, among other things, (i) include a capital measure called “Common Equity Tier 1” (“CET1”), (ii) specify that Tier 1 capital consists of CET1 and “Additional Tier 1 capital” instruments meeting specified requirements, (iii) define CET1 narrowly by requiring that most deductions/adjustments to regulatory capital measures be made to CETI and not to the other components of capital, and (iv) require certain deductions/adjustments to capital.

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Under the Basel III Capital Rules, the initial minimum capital ratios are as follows:

•4.5% CET1 to risk-weighted assets.

•6.0% Tier 1 capital to risk-weighted assets.

•8.0% Total capital to risk-weighted assets.

•4.0% Tier 1 capital to average quarterly assets (known as the “leverage ratio”).

The Basel III Capital Rules also require a “capital conservation buffer”, composed entirely of CET1, on top of these minimum risk-weighted asset ratios. The capital conservation buffer is 2.5%. The Basel III Capital Rules also provide for a “countercyclical capital buffer” that is only applicable to certain covered institutions and does not have any current applicability to the Company, BancFirst, Pegasus or Worthington. The capital conservation buffer is designed to absorb losses during periods of economic stress and effectively increases the minimum required risk-weighted capital ratios. Banking institutions with a ratio of CET1 to risk-weighted assets below the effective minimum (4.5% plus the capital conservation buffer and, if applicable, the countercyclical capital buffer) will face constraints on dividends, equity repurchases and compensation based on the amount of the shortfall.

The Basel III Capital Rules require the Company, BancFirst, Pegasus and Worthington to maintain an additional capital conservation buffer of 2.5% of CET1, effectively resulting in minimum ratios of (i) CET1 to risk-weighted assets of at least 7%, (ii) Tier 1 capital to risk-weighted assets of at least 8.5%, (iii) a minimum ratio of total capital to risk-weighted assets of at least 10.5%; and (iv) a minimum leverage ratio of 4%. For more information on the Company’s Capital Ratios, see Note (15), “Stockholders’ Equity,” to the Company’s Consolidated Financial Statements.

Liquidity Coverage Ratio

The liquidity framework under the Basel III Capital Rules (the "Basel III liquidity framework") applies a balance sheet perspective to establish quantitative standards designed to ensure that a banking organization is appropriately positioned to satisfy its short- and long-term funding needs. One test to address short-term liquidity risk is referred to as the liquidity coverage ratio ("LCR"), designed to calculate the ratio of a banking entities' ratio of high-quality liquid assets to its total net cash flows over a 30-day time horizon. The other test, referred to as the net stable funding ratio ("NSFR"), is designed to promote more medium- and long-term asset funding by incenting banking entities to increase their holdings of U.S. Treasury securities and other sovereign debt, as well as increase the use of long-term debt as a funding source. Rules applicable to certain large banking organizations have been implemented for LCR and for NSFR; however, based on our asset size, these rules do not currently apply to the Company, BancFirst, Pegasus or Worthington.

Prompt Corrective Action

The FDI Act requires federal bank regulatory agencies to take “prompt corrective action” with respect to FDIC-insured depository institutions that do not meet minimum capital requirements. A depository institution’s treatment for purposes of the prompt corrective action provisions will depend upon how its capital levels compare to various capital measures and certain other factors, as established by regulation.

Under this system, the federal banking regulators have established five capital categories: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized and critically undercapitalized, in which all depository institutions are placed. The federal banking regulators have specified by regulation the relevant capital levels for each of the categories. Under certain circumstances, a well-capitalized, adequately capitalized or undercapitalized institution may be treated as if the institution were in the next lower capital category. Federal banking regulators are required to take various mandatory supervisory actions and are authorized to take other discretionary actions with respect to institutions in the three undercapitalized categories. The severity of the action depends upon the capital category in which the institution is placed. A depository institution that is undercapitalized is required to submit a capital restoration plan. Failure to meet capital guidelines could subject a bank to a variety of enforcement remedies by federal bank regulatory agencies, including termination of deposit insurance by the FDIC, restrictions on certain business activities and appointment of the FDIC as conservator or receiver. Generally, subject to a narrow exception, the banking regulator must appoint a receiver or conservator for an institution that is critically undercapitalized.

A bank will be (i) “well capitalized” if the institution has a total risk-based capital ratio of 10.0% or greater, a CET1 capital ratio of 6.5% or greater, a Tier 1 risk-based capital ratio of 8.0% or greater, and a leverage ratio of 5.0% or greater, and is not subject to any order or written directive by any such regulatory authority to meet and maintain a specific capital level for any capital measure; (ii)

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“adequately capitalized” if the institution has a total risk-based capital ratio of 8.0% or greater, a CET1 capital ratio of 4.5% or greater, a Tier 1 risk-based capital ratio of 6.0% or greater, and a leverage ratio of 4.0% or greater and is not “well capitalized”; (iii) “undercapitalized” if the institution has a total risk-based capital ratio that is less than 8.0%, a CET1 capital ratio less than 4.5%, a Tier 1 risk-based capital ratio of less than 6.0% or a leverage ratio of less than 4.0%; (iv) “significantly undercapitalized” if the institution has a total risk-based capital ratio of less than 6.0%, a CET1 capital ratio less than 3.0%, a Tier 1 risk-based capital ratio of less than 4.0% or a leverage ratio of less than 3.0%; and (v) “critically undercapitalized” if the institution’s tangible equity is equal to or less than 2.0% of average quarterly tangible assets. An institution may be downgraded to, or deemed to be in, a capital category that is lower than indicated by its capital ratios if it is determined to be in an unsafe or unsound condition or if it receives an unsatisfactory examination rating with respect to certain matters. A bank’s capital category is determined solely for applying prompt corrective action regulations, and the capital category may not constitute an accurate representation of the bank’s overall financial condition or prospects for other purposes.

The FDI Act generally prohibits a depository institution from making any capital distributions (including payment of a dividend) or paying any management fee to its parent holding company if the depository institution would thereafter be “undercapitalized.” “Undercapitalized” institutions are subject to growth limitations and are required to submit a capital restoration plan. The agencies may not accept such a plan without determining, among other things, that the plan is based on realistic assumptions and is likely to succeed in restoring the depository institution’s capital. In addition, for a capital restoration plan to be acceptable, the depository institution’s parent holding company must guarantee that the institution will comply with such capital restoration plan. The bank holding company must also provide appropriate assurances of performance. The aggregate liability of the parent holding company is limited to the lesser of (i) an amount equal to 5.0% of the depository institution’s total assets at the time it became undercapitalized and (ii) the amount which is necessary (or would have been necessary) to bring the institution into compliance with all capital standards applicable with respect to such institution as of the time it fails to comply with the plan. If a depository institution fails to submit an acceptable plan, it is treated as if it is “significantly undercapitalized.”

“Significantly undercapitalized” depository institutions may be subject to a number of requirements and restrictions, including orders to sell sufficient voting stock to become “adequately capitalized,” requirements to reduce total assets, and cessation of receipt of deposits from correspondent banks. “Critically undercapitalized” institutions are subject to the appointment of a receiver or conservator.

The appropriate federal banking agency may, under certain circumstances, reclassify a well-capitalized insured depository institution as adequately capitalized. The FDI Act provides that an institution may be reclassified if the appropriate federal banking agency determines (after notice and opportunity for hearing) that the institution is in an unsafe or unsound condition or deems the institution to be engaging in an unsafe or unsound practice. The appropriate agency is also permitted to require an adequately capitalized or undercapitalized institution to comply with the supervisory provisions as if the institution were in the next lower category (but not treat a significantly undercapitalized institution as critically undercapitalized) based on supervisory information other than the capital levels of the institution.

The Company believes that, as of December 31, 2023, BancFirst, Pegasus and Worthington were “well capitalized” based on the ratios provided in Note (15), “Stockholders’ Equity,” in the notes to consolidated financial statements included in Item 8.

Deposit Insurance Assessments

The deposits of BancFirst, Pegasus and Worthington are insured by the FDIC. This insurance is funded through assessments on insured depository institutions. The FDIC’s risk-based assessment system requires members to pay varying assessment rates into the DIF, depending upon the level of the institution’s capital and the degree of supervisory concern over the institution.

The FDIC insures the deposits of federally insured banks up to prescribed statutory limits for each depositor, currently $250,000 per depositor for each account ownership category. The amount of FDIC assessments paid by each insured depository institution is based on its relative risk of default as measured by regulatory capital ratios and other supervisory factors. The FDIC’s deposit insurance premium assessment is based on an institution’s average consolidated total assets minus average tangible equity. At least semi-annually, the FDIC will update its loss and income projections for the DIF and, if needed, will increase or decrease assessment rates, following notice-and-comment rulemaking, if required. If there are additional bank or financial institution failures or if the FDIC otherwise determines to increase assessment rates, BancFirst, Pegasus and Worthington may be required to pay higher FDIC insurance premiums. Any future increases in FDIC insurance premiums may have a material and adverse effect on BancFirst’s, Pegasus’ and Worthington's and hence the Company’s, earnings. In October 2022, the FDIC adopted a final rule to increase the initial base deposit insurance assessment rate schedules uniformly by 2 basis points beginning with the first quarterly assessment period of 2023. The increased assessment is expected to improve the likelihood that the DIF reserve ratio would reach the statutory minimum of 1.35% by the statutory deadline prescribed under the FDIC's amended restoration plan.

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The Company’s FDIC deposit insurance assessment expense totaled $5.8 million, $4.7 million and $3.5 million in 2023, 2022 and 2021, respectively.

As insurer, the FDIC is authorized to conduct examinations of and to require reporting by DIF-insured institutions. It also may prohibit any DIF-insured institution from engaging in any activity the FDIC determines by regulation or order to pose a serious threat to the DIF. The FDIC also has the authority to take enforcement actions against insured institutions.

Insurance of deposits may be terminated by the FDIC upon a finding that the institution has engaged or is engaging in unsafe and unsound practices, is in an unsafe or unsound condition to continue operations or has violated any applicable law, regulation, rule, order or condition imposed by the FDIC or written agreement entered into with the FDIC. The Company does not know of any practice, condition or violation that might lead to termination of deposit insurance for its banking subsidiaries.

Safety and Soundness Standards

The FDI Act requires the federal bank regulatory agencies to prescribe standards, by regulations or guidelines, relating to internal controls, information systems and internal audit systems, loan documentation, credit underwriting, interest rate risk exposure, asset growth, asset quality, earnings, stock valuation and compensation, fees and benefits and such other operational and managerial standards as the agencies deem appropriate. In general, the guidelines require, among other things, appropriate systems and practices to identify and manage the risk and exposures specified in the guidelines. The guidelines prohibit excessive compensation as an unsafe and unsound practice and describe compensation as excessive when the amounts paid are unreasonable or disproportionate to the services performed by an executive officer, employee, director or principal stockholder. In addition, the agencies adopted regulations that authorize, but do not require, an agency to order an institution that has been given notice by an agency that it is not satisfying any of such safety and soundness standards to submit a compliance plan. If, after being so notified, an institution fails to submit an acceptable compliance plan or fails in any material respect to implement an acceptable compliance plan, the agency must issue an order directing action to correct the deficiency and may issue an order directing other actions of the types to which an undercapitalized institution is subject under the “prompt corrective action” provisions of the FDI Act. See “--Prompt Corrective Action” above. If an institution fails to comply with such an order, the agency may seek to enforce such order in judicial proceedings and to impose civil money penalties.

Federal Banking Agency Compensation Guidelines

The Federal Reserve Board reviews, as part of its regular, risk-focused examination process, the incentive compensation arrangements of banking organizations, such as the Company, that are not “large, complex banking organizations.” These reviews are tailored to each organization based on the scope and complexity of the organization’s activities and the prevalence of incentive compensation arrangements. The findings of this supervisory initiative will be included in reports of examination. Deficiencies will be incorporated into the organization’s supervisory ratings, which can affect the organization’s ability to make acquisitions and take other actions. Enforcement actions may be taken against a banking organization if its incentive compensation arrangements, or related risk-management control or governance processes, pose a risk to the organization’s safety and soundness and the organization is not taking prompt and effective measures to correct the deficiencies.

Guidance issued by the Federal Reserve Board, OCC and FDIC is intended to ensure that the incentive compensation policies of banking organizations do not undermine the safety and soundness of such organizations by encouraging excessive risk-taking. The guidance, which covers all employees that have the ability to materially affect the risk profile of an organization, either individually or as part of a group, is based upon the key principles that a banking organization’s incentive compensation arrangements should (i) provide incentives that do not encourage risk-taking beyond the organization’s ability to effectively identify and manage risks, (ii) be compatible with effective internal controls and risk-management and (iii) be supported by strong corporate governance, including active and effective oversight by the organization’s board of directors.

In April 2016, the U.S. financial regulators, including the Federal Reserve Board and the SEC, proposed revised rules on incentive-based payment arrangements at specified regulated entities having at least $1 billion in total assets (which would include the Company, BancFirst and Pegasus). The proposed revised rules would establish general qualitative requirements applicable to all covered entities, which would include (i) prohibiting incentive arrangements that encourage inappropriate risks by providing excessive compensation; (ii) prohibiting incentive arrangements that encourage inappropriate risks that could lead to a material financial loss; (iii) establishing requirements for performance measures to appropriately balance risk and reward; (iv) requiring board of director oversight of incentive arrangements; and (v) mandating appropriate record-keeping. Under the proposed rule, larger financial institutions with total consolidated assets of at least $50 billion would be subject to additional requirements applicable to such institutions’ “senior executive officers” and “significant risk-takers.” These additional requirements, in which federal regulators were reported still to be interested in 2019, would not be applicable to the Company, BancFirst, Pegasus or Worthington.

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Effective on October 2, 2023, pursuant to a final rule adopted by the SEC, NASDAQ adopted listing standards mandating the recovery or “clawback” of excess incentive-based compensation earned by a current or former executive officer during the three fiscal years preceding the date the listed company is required to prepare an accounting restatement, including to correct an error that would result in a material misstatement if the error were corrected in the current period or left uncorrected in the current period. Each listed company was required to adopt by December 1, 2023, a compliant policy governing recovery of erroneously awarded compensation as required by the new listing standards. The Company has adopted a compliant policy governing the recovery of erroneously awarded compensation as required by the listing standards, which is filed as Exhibit 97 to this Form 10-K.

The scope, content and application of the U.S. banking regulators' policies on incentive compensation continue to evolve. It cannot be determined at this time whether compliance with such policies will adversely affect the ability of the Company, BancFirst, Pegasus and Worthington to hire, retain and motivate key employees.

Cybersecurity

Federal agencies have issued statements regarding cybersecurity. Financial institutions are expected to design multiple layers of security controls to establish lines of defense and to ensure that their risk management processes also address the risk posed by compromised customer credentials, including security measures, to reliably authenticate customers accessing internet-based services of the financial institution. Management is expected to maintain sufficient business continuity planning processes to ensure the rapid recovery, resumption and maintenance of the institution’s operations after a cyber-attack involving destructive malware. A financial institution is also expected to develop appropriate processes to enable recovery of data and business operations and address rebuilding network capabilities and restoring data if the institution or its critical service providers fall victim to this type of cyber-attack. Failure to observe the regulatory guidance could subject the Company, BancFirst, Pegasus and Worthington to various regulatory sanctions, including financial penalties.

In the ordinary course of business, the Company, BancFirst, Pegasus and Worthington rely on electronic communications and information systems to conduct operations and to store sensitive data. They employ an in-depth, layered, defensive approach that leverages people, processes and technology to manage and maintain cybersecurity controls. The Company, BancFirst, Pegasus and Worthington employ a variety of preventative and detective tools to monitor, block, and provide alerts regarding suspicious activity, as well as to report on any suspected advanced persistent threats. Notwithstanding the strength of their defensive measures, the threat from cyber-attacks is severe, attacks are sophisticated and increasing in volume, and attackers respond rapidly to changes in defensive measures. While to date, the Company, BancFirst, Pegasus and Worthington have not detected a significant compromise, significant data loss or any material financial losses related to cybersecurity attacks, the Company, BancFirst, Pegasus and Worthington's systems and those of their customers and third-party service providers are under constant threat and it is possible that the Company, BancFirst, Pegasus and Worthington could experience a significant event in the future.

In November 2021, federal banking agencies, including the Federal Reserve Board and the FDIC, issued a final rule to improve the sharing of information about cyber incidents, compliance was required by May 1, 2022. Under the final rule a banking organization’s primary federal regulator must receive notification as soon as possible and no later than 36 hours after the banking organization determines that a significant computer-security incident, known as a “notification incident,” has occurred. Further, the final rule separately requires a bank service provider to notify each of its affected banking organization customers as soon as possible when the provider determines that it has experienced a computer-security incident that has caused, or is reasonably likely to cause, a material service disruption or degradation for four or more hours.

In June 2023, the Federal Trade Commission's amendments to the Gramm-Leach-Bliley Act's Safeguards Rule went into effect requiring financial institutions to: (i) appoint a qualified individual to oversee and implement their information security programs; (ii) implement additional criteria for information security risk assessments; (iii) implement safeguards identified by assessments, including access controls, data inventory, data disposal, change management, and monitoring, among other things; (iv) implement information system monitoring in the form of either "continuous monitoring" or "periodic penetration testing;" (v) implement additional controls including training for security personnel, periodic assessment of service providers, written incident response plans, and periodic reports from the qualified individual to the board of directors.

See Item 1A. Risk Factors for a further discussion of risks related to cybersecurity and Item 1C. Cybersecurity for a further discussion of risk management strategies and governance processes related to cybersecurity.

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Fiscal and Monetary Policies

The Company’s business and earnings are affected significantly by the fiscal and monetary policies of the federal government and its agencies. The Company is particularly affected by the policies of the Federal Reserve Board, which regulates the supply of money and credit in the United States. Among the instruments of monetary policy available to the Federal Reserve Board are (a) conducting open market operations in United States government securities, (b) changing the discount rates of borrowings of depository institutions, (c) imposing or changing reserve requirements against depository institutions’ deposits and (d) imposing or changing reserve requirements against certain borrowings by banks and their affiliates. These methods are used in varying degrees and combinations to directly affect the availability of bank loans and deposits, as well as the interest rates charged on loans and paid on deposits. The policies of the Federal Reserve Board may have a material effect on the Company’s business, results of operations and financial condition.

Privacy Provisions of the GLB Act

Federal banking regulators, as required under the GLB Act, have adopted rules limiting the ability of banks and other financial institutions to disclose nonpublic information about consumers to nonaffiliated third parties. The rules require disclosure of privacy policies to consumers and, in some circumstances, allow consumers to prevent disclosure of certain personal information to nonaffiliated third parties. The privacy provisions of the GLB Act affect how consumer information is transmitted through diversified financial services companies and conveyed to outside vendors.

Durbin Amendment

The Durbin Amendment is part of the Dodd-Frank Act that limits transaction fees imposed upon merchants by debit card issuers. Interchange fees or "debit card swipe fees" are paid to banks by acquirers for the privilege of accepting payment cards. Federal Reserve Board rules applicable to financial institutions that have assets of $10 billion or more provide that the maximum permissible interchange fee for an electronic debit transaction is the sum of 21 cents per transaction and 5 basis points multiplied by the value of the transaction. An upward adjustment of no more than 1 cent to an issuer's debit card interchange fee is allowed if the card issuer develops and implements policies and procedures reasonably designed to achieve certain fraud-prevention standards. The Federal Reserve Board also has rules governing routing and exclusivity that require issuers to offer two unaffiliated networks for routing transactions on each debit or prepaid product.

The Company exceeded $10 billion in total assets at December 31, 2022. Pursuant to the Durbin Amendment of the Dodd-Frank Act this triggered a reduction of annual pretax income from debit card interchange fees that began July 1, 2023. Additional information regarding the Durbin Amendment is presented in Item 1A. Risk Factors.

In October 2023, the Federal Reserve issued a proposal under which, if adopted, the maximum permissible interchange fee for an electronic debit transaction would be the sum of 14.4 cents per transaction and 4 basis points multiplied by the value of the transaction. Furthermore, the fraud-prevention adjustment would increase from a maximum of 1 cent to 1.3 cents. The proposal would, if adopted, adopt an approach for future adjustments to the interchange fee cap, which would occur every other year based on issuer cost data gathered by the Federal Reserve from large debit card issuers.

Anti-Money Laundering and the Patriot Act

The USA Patriot Act of 2001 (the “Patriot Act”) facilitates the ability of U.S. law enforcement agencies and intelligence communities to work together to combat terrorism on a variety of fronts. The Patriot Act imposes significant compliance and due diligence obligations, specifies crimes and penalties and establishes the extra-territorial jurisdiction of the United States. The U.S. Treasury Department has issued a number of implementing regulations, which apply various requirements of the Patriot Act to financial institutions such as BancFirst, Pegasus and Worthington. Those regulations impose obligations on financial institutions to maintain appropriate policies, procedures and controls to detect, prevent and report money laundering and terrorist financing, and have significant implications for depository institutions, brokers, dealers and other businesses involved in the transfer of money. The Patriot Act also requires federal bank regulators to evaluate the effectiveness of an applicant in combating money laundering in determining whether to approve a proposed bank acquisition. Failure of a financial institution to maintain and implement adequate programs to combat money laundering and terrorist financing, or to comply with all of the relevant laws or regulations, could have serious legal and reputational consequences for the institution, including causing applicable bank regulatory authorities not to approve merger or acquisition

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transactions when regulatory approval is required or to prohibit such transactions even if approval is not required. Regulatory authorities have imposed cease and desist orders and civil money penalties against institutions found to be violating these obligations.

Office of Foreign Assets Control Regulation

The U.S. Treasury Department’s Office of Foreign Assets Control, or OFAC, administers and enforces economic and trade sanctions against targeted foreign countries and regimes, under authority of various laws, including designated foreign countries, nationals and others. OFAC publishes lists of specially designated targets and countries.

Banking regulators examine banks for compliance with the economic sanctions regulations administered by OFAC. Financial institutions are responsible for, among other things, blocking accounts of, and transactions with, such targets and countries, prohibiting unlicensed trade and financial transactions with them and reporting blocked transactions after their occurrence. Failure to comply with these sanctions could have serious financial, legal and reputational consequences, including causing applicable bank regulatory authorities not to approve merger or acquisition transactions when regulatory approval is required or to prohibit such transactions even if approval is not required. Regulatory authorities have imposed cease and desist orders and civil money penalties against institutions found to be violating these obligations.

Community Reinvestment Act

The Community Reinvestment Act of 1977 (the “CRA”), requires depository institutions to assist in meeting the credit needs of their market areas consistent with safe and sound banking practices. Under the CRA, each depository institution is required to help meet the credit needs of its market areas by, among other things, providing credit to low- and moderate-income individuals and communities. Depository institutions are periodically examined for compliance with the CRA and are assigned ratings. In order for a financial holding company to commence any new activity permitted by the BHC Act, or to acquire any company engaged in any new activity permitted by the BHC Act, each insured depository institution subsidiary of the financial holding company must have received a rating of at least “satisfactory” in its most recent examination under the CRA. Furthermore, banking regulations take into account the CRA rating when considering approval of a proposed transaction. During its last examination in 2021, a rating of “satisfactory” was received by BancFirst. During its last examination in 2020, a rating of “satisfactory” was received by Pegasus. During its last examination in 2018, a rating of "outstanding" was received by Worthington.

On October 24, 2023, the OCC, the Federal Reserve Board and the FDIC, issued a joint final rule to modernize the CRA regulatory framework. The final rule is intended, among other things, to adapt to changes in the banking industry, including the expanded role of mobile and online banking, and to tailor performance standards to account for differences in bank size and business models. The final rule introduces new tests under which the performance of banks with over $2 billion in assets will be assessed. The new rule also includes data collection and reporting requirements, some of which are applicable only to banks with over $10 billion in assets, such as BancFirst. Most provisions of the final rule will become effective on January 1, 2026, and the data reporting requirements will become effective on January 1, 2027.

Consumer Laws and Regulations

Banks and other financial institutions are subject to numerous laws and regulations intended to protect consumers in their transactions with banks. These laws include the Equal Credit Opportunity Act, the Fair Credit Reporting Act, the Truth in Lending Act, the Truth in Savings Act, the Electronic Fund Transfer Act, the Expedited Funds Availability Act, the Home Mortgage Disclosure Act, the Fair Housing Act, the Real Estate Settlement Procedures Act, the Fair Debt Collection Practices Act, the Service Members Civil Relief Act and these laws’ respective state-law counterparts, as well as state usury laws and laws regarding unfair and deceptive acts and practices. These and other federal laws, among other things, require disclosures of the cost of credit and terms of deposit accounts, provide substantive consumer rights, prohibit discrimination in credit transactions, regulate the use of credit report information, provide financial privacy protections, prohibit unfair, deceptive and abusive practices, restrict the Company’s ability to raise interest rates and subject the Company to substantial regulatory oversight. Violations of applicable consumer protection laws can result in significant potential liability from litigation brought by customers, including actual damages, restitution and attorneys’ fees. Federal bank regulators, state attorneys general and state and local consumer protection agencies may also seek to enforce consumer protection requirements and obtain these and other remedies, including regulatory sanctions, customer rescission rights, action by the state and local attorneys general in each jurisdiction in which the Company operates and civil money penalties. Failure to comply with consumer protection requirements may also result in the Company’s failure to obtain any required bank regulatory approval for merger or acquisition transactions the Company may wish to pursue or its prohibition from engaging in such transactions even if approval is not required.

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The Consumer Financial Protection Bureau (“CFPB”) is a federal agency responsible for implementing, examining and enforcing compliance with federal consumer protection laws. The CFPB focuses on:

•Risks to consumers and compliance with the federal consumer financial laws, when it evaluates the policies and practices of a financial institution.

•The markets in which firms operate and risks to consumers posed by activities in those markets.

•Depository institutions that offer a wide variety of consumer financial products and services.

•Depository institutions with a more specialized focus.

•Non-depository companies that offer one or more consumer financial products or services.

The CFPB has broad rulemaking authority for a wide range of consumer financial laws that apply to all banks, including, among other things, the authority to prohibit “unfair, deceptive or abusive” acts and practices. Abusive acts or practices are defined as those that materially interfere with a consumer’s ability to understand a term or condition of a consumer financial product or service or take unreasonable advantage of a consumer’s (i) lack of financial savvy, (ii) inability to protect himself in the selection or use of consumer financial products or services, or (iii) reasonable reliance on a covered entity to act in the consumer’s interests. The CFPB can issue cease-and-desist orders against banks and other entities that violate consumer financial laws. The CFPB may also institute a civil action against an entity in violation of federal consumer financial law in order to impose a civil penalty or injunction. The CFPB has examination and enforcement authority over all banks with more than $10 billion in assets, as well as their affiliates. Banking regulators take into account compliance with consumer protection laws when considering approval of a proposed transaction.

Interstate Banking and Branching

Under the Riegle-Neal Interstate Banking and Branching Efficiency Act, as amended by the Dodd-Frank Act (the “Riegle-Neal Act”), a bank holding company may acquire banks in states other than its home state, subject to any state requirement that the bank has been organized and operating for a minimum period of time, not to exceed five years, and the requirement that the bank holding company, prior to or following the proposed acquisition, control no more than 10% of the total amount of deposits of insured depository institutions nationwide and no more than 30% of such deposits in that state (or such amount as set by the state if such amount is lower than 30%).

The Riegle-Neal Act also authorizes banks to merge across state lines, thereby creating interstate branches. Banks are also permitted to either acquire existing banks or to establish new branches in other states where authorized under the laws of those states. The Dodd-Frank Act also requires that a bank holding company or bank be well-capitalized and well-managed (rather than simply adequately capitalized and adequately managed) in order to take advantage of these interstate banking and branching provisions.

The Volcker Rule

The Volcker Rule under the Dodd-Frank Act restricts banks and their affiliates from engaging in proprietary trading and investing in and sponsoring hedge funds and private equity funds. The Volcker Rule does not significantly impact the operations of the Company as it does not engage in the businesses prohibited by the Volcker Rule.

Depositor Preference

The FDI Act provides that, in the event of the “liquidation or other resolution” of an insured depository institution, the claims of depositors of the institution (including the claims of the FDIC as subrogee of insured depositors) and certain claims for administrative expenses of the FDIC as a receiver, will have priority over other general unsecured claims against the institution. If an insured depository institution fails, insured and uninsured depositors, along with the FDIC, will have priority in payment ahead of unsecured, non-deposit creditors with respect to any extensions of credit they have made to such insured depository institution.

Changes in Laws, Regulations or Policies

Banking is a heavily regulated industry. Additional initiatives may be proposed or introduced before Congress and other government bodies in the future. Such proposals, if enacted, may further alter the structure, regulation and competitive relationship among financial institutions and may subject the Company to increased supervision and disclosure and reporting requirements. In addition, the various bank regulatory agencies often adopt new rules, regulations, and policies to implement and enforce existing legislation. It cannot be predicted whether, or in what form, any such legislation or regulatory changes in policy may be enacted or the extent to which the business of the Company would be affected thereby.

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State Regulation

BancFirst is an Oklahoma-chartered state bank. Accordingly, BancFirst’s operations are subject to various requirements and restrictions of Oklahoma state law relating to loans, lending limits, interest rates payable on deposits, investments, mergers and acquisitions, borrowings, dividends, capital adequacy and other matters. However, Oklahoma banking law specifically empowers a state-chartered bank such as BancFirst to exercise the same powers as are conferred upon national banks by the laws of the United States and the regulations and policies of the Office of the Comptroller of the Currency, unless otherwise prohibited or limited by the Oklahoma Banking Commissioner or the Oklahoma State Banking Board. Accordingly, unless a specific provision of Oklahoma law otherwise provides, a state-chartered bank is empowered to conduct all activities that a national bank may conduct.

Pegasus and Worthington are Texas-chartered state banks. Accordingly, their operations are subject to various requirements and restrictions of Texas state law relating to loans, lending limits, interest rates payable on deposits, investments, mergers and acquisitions, borrowings, dividends, capital adequacy and other matters. However, Texas banking law specifically empowers state-chartered banks such as Pegasus and Worthington to exercise the same powers as are conferred upon national banks by the laws of the United States and the regulations and policies of the Office of the Comptroller of the Currency, unless otherwise prohibited or limited by the Texas Banking Commissioner or the Texas Finance Commission. Accordingly, unless a specific provision of Texas law otherwise provides, a state-chartered bank is empowered to conduct all activities that a national bank may conduct.

National banks are authorized by the GLB Act to engage, through “financial subsidiaries,” in any activity that is permissible for a financial holding company and any activity that the Secretary of the Treasury, in consultation with the Federal Reserve Board, determines is financial in nature or incidental to any such financial activity, except (1) insurance underwriting, (2) real estate development or real estate investment activities (unless otherwise permitted by law), (3) insurance company portfolio investments and (4) merchant banking. The authority of a national bank to invest in a financial subsidiary is subject to a number of conditions, including, among other things, requirements that the bank must be well managed and well capitalized (after deducting from the bank’s capital outstanding investments in financial subsidiaries). The GLB Act provides that state member banks, such as BancFirst, Pegasus and Worthington, may invest in financial subsidiaries (assuming they have the requisite investment authority under applicable state law), subject to the same conditions that apply to national bank investments in financial subsidiaries.

As a state member bank, BancFirst is subject to primary supervision, periodic examination and regulation by the Oklahoma Banking Department and the Federal Reserve Bank of Kansas City, and Oklahoma law provides that BancFirst must maintain reserves against deposits as required by the FDI Act. The Oklahoma Banking Commissioner is authorized by statute to accept a Federal Reserve Bank examination in lieu of a state examination. In practice, the Federal Reserve Bank of Kansas City and the Oklahoma Banking Department alternate examinations of BancFirst. If, as a result of an examination of a bank, the Oklahoma Banking Department determines that the financial condition, capital resources, asset quality, earnings prospects, management, liquidity, or other aspects of the bank’s operations are unsatisfactory or that the management of the bank is violating or has violated any law or regulation, various remedies, including the remedy of injunction, are available to the Oklahoma Banking Department. Oklahoma law permits the acquisition of an unlimited number of wholly-owned bank subsidiaries so long as aggregate deposits at the time of acquisition in a multi-bank holding company do not exceed 20% of the total amount of deposits of insured depository institutions located in Oklahoma.

As state member banks, Pegasus and Worthington are subject to primary supervision, periodic examination and regulation by the Texas Department of Banking and the Federal Reserve Bank of Dallas, and Texas law provides that Pegasus and Worthington must maintain reserves against deposits as required by the FDI Act. The Texas Department of Banking is authorized by statute to accept a Federal Reserve Bank examination in lieu of a state examination. In practice, the Federal Reserve Bank of Dallas and the Texas Department of Banking alternate examinations. If, as a result of an examination of a bank, the Texas Department of Banking determines that the financial condition, capital resources, asset quality, earnings prospects, management, liquidity, or other aspects of the bank’s operations are unsatisfactory or that the management of the bank is violating or has violated any law or regulation, various remedies, including the remedy of injunction, are available to the Texas Department of Banking.

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In addition to the provisions of the GLB Act that authorize state member banks to invest in financial subsidiaries (assuming they have the requisite investment authority under applicable state law) on the same conditions that apply to national banks, Federal Deposit Insurance Corporation Improvement Act (“FDICIA”) provides that FDIC-insured state banks such as BancFirst, Pegasus and Worthington may engage directly or through a subsidiary in certain activities that are not permissible for a national bank, if the activity is authorized by applicable state law, the FDIC determines that the activity does not pose a significant risk to the DIF and the bank is in compliance with its applicable capital standards.

Securities Laws

The Company’s common stock is publicly held and listed on the NASDAQ Global Select Market, and the Company is subject to the periodic reporting, information, proxy solicitation, insider trading, corporate governance and other requirements and restrictions of the Securities Exchange Act of 1934 and the regulations of the SEC promulgated thereunder as well as listing requirements of the NASDAQ. In addition, the Dodd-Frank Act includes provisions that affect corporate governance and executive compensation at most United States publicly traded companies, including the Company.

The Company is also subject to the accounting oversight and corporate governance requirements of the Sarbanes-Oxley Act of 2002, including:

•required executive certification of financial presentation;

•increased requirements for board audit committees and their members;

•enhanced disclosures of controls and procedures and internal control over financial reporting;

•enhanced controls over, and reporting of, insider trading and

•increased penalties for financial crimes and forfeiture of executive bonuses in certain circumstances.

Available Information

The Company maintains a website at www.bancfirst.bank. The Company provides copies of the most recently filed 10-K, 10-Q and proxy statements, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after the Company electronically files the material with, or furnishes it to, the SEC. The website also provides links to the SEC’s website (http://www.sec.gov) where all of the Company’s filings with the SEC can be obtained immediately upon filing. You may also request a copy of the Company’s filings, at no cost, by writing or telephoning the Company at the following address:

BancFirst Corporation

100 N. Broadway Ave.

Oklahoma City, Oklahoma 73102

ATTENTION: Randy Foraker

Executive Vice President

(405) 270-1044

1A. Risk Factors

In the course of conducting our business operations, we are exposed to a variety of risks that are inherent to the financial services industry. The following discusses some of the key inherent risk factors that could affect our business and operations. The risks and uncertainties described below are not the only ones we are facing. Other factors besides those discussed below or elsewhere in this report also could adversely affect our business and operations, and the risk factors discussed below should not be considered a complete list of potential risks that may affect us. Further, to the extent that any of the information contained in this report constitutes forward-looking statements, the risk factors set forth below also are cautionary statements identifying important factors that could cause our actual results to differ materially from those expressed in any forward-looking statements made by or on behalf of us.

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Risks Related to Our Business

Interest Rate Risks

Fluctuations in interest rates could reduce our profitability.

We realize income primarily from the difference between interest earned on loans and investments and the interest paid on deposits and borrowings. We expect that we will periodically experience “gaps” in the interest rate sensitivities of our assets and liabilities, meaning that either our interest-earning assets will be more sensitive to changes in market interest rates than our interest-bearing liabilities, or vice versa. Changes in market interest rates could either positively or negatively affect our net interest income and our profitability, depending on the magnitude, direction and duration of the change. If interest rates decline, our net interest margin could experience compression.

We are unable to predict fluctuations of market interest rates, which are affected by, among other factors, changes in inflation rates, economic growth, money supply, government debt, domestic and foreign financial markets and political developments, including terrorist acts and acts of war. Our asset-liability management strategy, which is designed to mitigate our risk from changes in market interest rates, may not be able to mitigate changes in interest rates from having a material adverse effect on our results of operations and financial condition.

Credit and Lending Risks

We may be adversely affected by declining crude oil and natural gas prices.

As of December 31, 2023, the price per barrel of crude oil was approximately $76 down from $78 at December 31, 2022. At December 31, 2023, the price per million British thermal units of natural gas was approximately $2.51 down from $4.48 at December 31, 2022. If oil and natural gas prices drop below the marginal cost of production for an extended period, we would expect to experience weaker energy loan demand and increased losses within our energy portfolio. Furthermore, a prolonged period of low oil and natural gas prices could also have a negative impact on the energy producing economies and, in particular, the economies of states such as Oklahoma and Texas, where the energy industry is a significant driver of economic activity. Although as of December 31, 2023, oil and gas loans comprised 7.66% of our loan portfolio, the impact of lower oil and natural gas prices could have an indirect impact on our other loan portfolio segments, for example, commercial real estate (“CRE”).

A substantial portion of our loan portfolio is secured by real estate, in particular commercial real estate. Deterioration in the real estate markets could lead to losses, which could have a material negative effect on our financial condition and results of operations.

Loans secured by real estate constitute a significant portion of our loan portfolio. At December 31, 2023, this percentage was approximately 69%. While our record of asset quality has historically been solid, we cannot guarantee that our record of asset quality will be maintained in future periods. The ability of our borrowers to repay their loans could be adversely impacted by a significant change in market conditions, which not only could result in our experiencing an increase in charge-offs, but also could necessitate increasing our provision for credit losses. In addition, because one to four family residential and commercial real estate loans represent the majority of our real estate loans outstanding, a decline in tenant occupancy due to such factors or for other reasons could adversely impact the ability of our borrowers to repay their loans on a timely basis, which could have a negative impact on our financial condition and results of operations.

We are subject to environmental liability risk associated with lending activities.

A significant portion of our loan portfolio is secured by real property. During the ordinary course of business, we may foreclose on and take title to properties securing certain loans. In doing so, there is a risk that hazardous or toxic substances could be found on these properties. If hazardous or toxic substances are found, we may be liable for remediation costs, as well as for personal injury and property damage. Environmental laws may require us to incur substantial expenses and may materially reduce the affected property’s value or limit our ability to use or sell the affected property. In addition, future laws or more stringent interpretations or enforcement policies with respect to existing laws may increase our exposure to environmental liability. Although we have policies and procedures to perform an environmental review before initiating any foreclosure action on real property, these reviews may not be sufficient to detect all potential environmental hazards. The remediation costs and any other financial liabilities associated with an environmental hazard could have a material adverse effect on our financial condition and results of operations.

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If a significant number of customers fail to perform under their loans, our business, profitability and financial condition would be adversely affected.

There are inherent risks associated with our lending activities. As a lender, we face the risk that a significant number of our borrowers will fail to pay their loans because of other factors, including the impact of changes in interest rates and changes in the economic conditions in the markets where we operate. If borrower defaults cause losses in excess of our allowance for credit losses, it could have an adverse effect on our business, profitability and financial condition. We have established an evaluation process designed to recognize credit losses as they occur. While this evaluation process uses historical and other objective information, the classification of loans and the estimation of credit losses are dependent to a great extent on our experience and judgment. If charge-offs in future periods exceed the allowance for credit losses, we will need additional provisions to increase the allowance for credit losses. Any increases in the allowance for credit losses will result in a decrease in net income and capital, and may have a material adverse effect on our financial condition and results of operations. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations” located elsewhere in this report for further discussion related to our process for determining the appropriate level of the allowance for credit losses. We cannot assure you that our future credit losses will not have any material adverse effects on our business, profitability or financial condition.

External and Market-Related Risks

Changes in economic conditions, especially in the State of Oklahoma, pose significant challenges for us and could adversely affect our financial condition and results of operations.

Our business is affected by conditions outside our control, including the rate of economic growth in general, the level of unemployment, increases in inflation and the level of interest rates. Economic conditions affect the level of demand for and the profitability of our products and services. A slowdown in the general economic activity, particularly in Oklahoma, could negatively impact our business. BancFirst operates exclusively within the State of Oklahoma and, unlike larger national or superregional banks that serve a broader and more diverse geographic region; BancFirst lending is also primarily concentrated in the State of Oklahoma. As a result, our financial condition, results of operations and cash flows are subject to changes in the economic conditions in the State of Oklahoma. Our continued success is largely dependent upon the continued growth or stability of the communities we serve. A decline in the economies of these communities could negatively impact our net income and profitability. Additionally, declines in the economies of these communities and of the State of Oklahoma in general could affect our ability to generate new loans, receive repayments of existing loans and our ability to attract new deposits, adversely affecting our financial condition.

Maintaining or increasing our market share depends on market acceptance and regulatory approval of new products and services.

Our success depends, in part, upon our ability to adapt our products and services to evolving industry standards and consumer demand. There is increasing pressure on financial services companies to provide products and services at lower prices. In addition, the widespread adoption of new technologies, including Internet-based services, could require us to make substantial expenditures to modify or adapt our existing products or services. A failure to achieve market acceptance of any new products we introduce, or a failure to introduce products that the market may demand, could have an adverse effect on our business, profitability or growth prospects.

Changes in consumer use of banks and changes in consumer spending and savings habits could adversely affect our financial results.

Technology and other changes now allow many customers to complete financial transactions without using banks. For example, consumers can pay bills and transfer funds directly without going through a bank. This process of eliminating banks as intermediaries could result in the loss of fee income, as well as the loss of customer deposits and income generated from those deposits. In addition, changes in consumer spending and savings habits could adversely affect our operations, and we may be unable to timely develop competitive new products and services in response to these changes.

The soundness of other financial institutions could have a material adverse effect on our business, growth and profitability.

Financial services institutions are interrelated because of trading, clearing, counterparty or other relationships. We have exposure to many different industries and counterparties, and routinely execute transactions with counterparties in the financial services industry, including commercial banks, brokers and dealers, investment banks and other institutional clients. Many of these transactions expose our business to credit risk in the event of a default by a counterparty or client. In addition, our credit risk may be exacerbated when the collateral we hold cannot be realized upon or is liquidated at prices not sufficient to recover the full amount of the credit or derivative exposure due to us. Any such losses could have a material adverse effect on our financial condition and results of operations.

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Negative developments in the banking industry could adversely affect our financial condition and results of operations.

The bank failures and related negative media attention in early 2023 have generated significant market trading volatility among publicly traded bank holding companies and, in particular, regional, as well as community banks like the Company. These developments have negatively impacted customer confidence in regional and community banks that are not considered too big to fail, which has prompted customers to move uninsured deposits to banks that are perceived as too big to fail. Further, competition for deposits has recently increased and available yields have similarly increased, causing non-interest bearing deposits to move to interest bearing deposits and sweeps. If such movement is permanent, it will reduce our net interest margin going forward. The financial impact on the Company of ongoing market volatility, continued inflation and rising interest rates will depend on future developments which are highly uncertain and difficult to predict.

Competition with other financial institutions could adversely affect our profitability.

We face vigorous competition from banks and other financial institutions, including savings and loan associations, savings banks, finance companies and credit unions. A portion of these banks and other financial institutions have substantially greater resources and lending limits, larger branch systems and other banking services that we do not offer. To a limited extent, we also compete with other providers of financial services, such as money market mutual funds, brokerage firms, consumer finance companies and insurance companies. When new competitors seek to enter one of our markets, or when existing market participants seek to increase their market share, they sometimes undercut the pricing and/or credit terms prevalent in that market. This competition may reduce or limit our margins on banking and trust services, reduce our market share and adversely affect our results of operations and financial condition.

Failure to keep pace with technological change could adversely affect our results of operations and financial condition.

The financial services industry is undergoing rapid technological changes with frequent introductions of new technology-driven products and services. In addition to better serving our customers, the effective use of technology increases our efficiency and enables us to reduce costs. Our future success will depend in part upon our ability to address the needs of our customers by using technology to provide products and services that will satisfy customer demands for convenience as well as to create additional efficiencies in our operations as we continue to grow and expand our market area. Many of our larger competitors have substantially greater resources to invest in technological improvements. As a result, they may be able to offer additional or superior products to those that we will be able to offer, which would put us at a competitive disadvantage. Accordingly, we cannot assure you that we will be able to effectively implement new technology-driven products and services or be successful in marketing such products and services to our customers.

Compliance and Regulatory Risks

We operate in a highly regulated environment and may be adversely affected by changes in federal and state laws and regulations.

We are subject to extensive regulation, supervision and examination by federal and state banking authorities. Any change in applicable regulations or federal or state legislation could have a substantial impact on us and our results of operations. Changes to statutes, regulations or regulatory policies or supervisory guidance, including changes in interpretation or implementation of statutes, regulations, policies or supervisory guidance, could affect us in substantial and unpredictable ways. Such changes could subject us to additional costs, limit the types of financial services and products we may offer and/or increase the ability of non-banks to offer competing financial services and products, among other things. Failure to comply with laws, regulations, policies or supervisory guidance could result in enforcement and other legal actions by federal or state authorities, including criminal and civil penalties, the loss of FDIC insurance, the revocation of a banking charter, other sanctions by regulatory agencies, civil money penalties and/or reputational damage. In this regard, government authorities, including the bank regulatory agencies, are pursuing aggressive enforcement actions with respect to compliance and other legal matters involving financial activities, which heightens the risks associated with actual and perceived compliance failures. Any of the foregoing could have a material adverse effect on our business, financial condition and results of operations.

See the section captioned “Supervision and Regulation” included in Item 1. Business, located elsewhere in this report.

Changes in monetary policies may have an adverse effect on our business.

Our results of operations are affected by credit policies of monetary authorities, particularly the Federal Reserve Board. Actions by monetary and fiscal authorities, including the Federal Reserve Board, could have an adverse effect on our deposit levels, loan demand or business earnings. See “Item 1 - Business-Supervision and Regulation.” Our profitability is greatly dependent upon our earning a positive interest spread between our loan and securities portfolio, and our funding deposits and borrowings. Changes in the level of interest rates, a prolonged unfavorable interest rate environment or a decrease in our level of deposits that increases our cost of funds could negatively affect our profitability and financial condition.

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Acquisition Related Risk

There can be no assurance that the integration of our acquisitions will be successful or will not result in unforeseen difficulties that may absorb significant management attention.

Our completed acquisitions, or any future acquisition, may not produce the revenue, cost savings, earnings or synergies that we anticipated. The process of integrating acquired companies into our business may also result in unforeseen difficulties. Unforeseen operating difficulties may absorb significant management attention, which we might otherwise devote to our existing business. Also, the process may require significant financial resources that we might otherwise allocate to other activities, including the ongoing development or expansion of our existing operations. Additionally, we may be exposed to potential asset quality issues or unknown or contingent liabilities of the banks, businesses, assets and liabilities we acquire. If these issues or liabilities exceed our estimates, our results of operations and financial condition may be negatively affected.

If we pursue a future acquisition, our management could spend a significant amount of time and effort identifying and completing the acquisition. If we make a future acquisition, we could issue equity securities, which would dilute current stockholders’ percentage ownership, incur substantial debt, assume contingent liabilities and be required to record an impairment of goodwill or any combination of the foregoing.

Liquidity Risk

We are subject to liquidity risk.

Liquidity is the ability to fund increases in assets and meet obligations as they come due, all without incurring unacceptable losses. Banks are especially vulnerable to liquidity risk because of their role in the transformation of demand or short-term deposits into longer-term loans or other extensions of credit. We, like other financial-services companies, rely to a significant extent on external sources of funding (such as deposits and borrowings) for the liquidity needed in the conduct of our business. A number of factors beyond our control, however, could have a detrimental impact on the level or cost of that funding and thus on our liquidity. These include market disruptions, changes in our credit ratings or the sentiment of our investors, the loss of substantial deposit relationships and reputational damage. Unexpected declines or limits on the dividends declared and paid by our subsidiaries also could adversely affect our liquidity position. While our policies and controls are designed to ensure that we maintain adequate liquidity to conduct our business in the ordinary course even in a stressed environment, there can be no assurance that our liquidity position will never become compromised. In such an event, we may be required to sell assets at a loss in order to continue our operations. This could damage the performance and value of our business, prompt regulatory intervention and harm our reputation, and if the condition were to persist for any appreciable period of time, our viability as a going concern could be threatened. See “Quantitative and Qualitative Disclosures about Market Risk—Liquidity Risk” in Part II, Item 7A for a discussion of how we monitor and manage liquidity risk.

Operational Risks

Our accounting estimates and risk-management processes may not be effective in mitigating risk and loss.

We maintain an enterprise risk-management program that is designed to identify, quantify, monitor, report and control the risks that it faces. These include interest-rate risk, credit risk, liquidity risk, operational risk, reputational risk and compliance and litigation risk. While we assess and improve this program on an ongoing basis, there can be no assurance that its approach and framework for risk-management and related controls will effectively mitigate risk and limit losses in our business. To comply with generally accepted accounting principles, management must sometimes exercise judgment in selecting, determining and applying accounting methods, assumptions and estimates. This can arise, for example, in determining the allowance for credit losses or the fair value of assets or liabilities. The judgments required of management can involve difficult, subjective, or complex matters with a high degree of uncertainty, and several different judgments could be reasonable under the circumstances and yet result in significantly different results being reported. See “Critical Accounting Policies and Estimates” in Part II, Item 7. If management’s judgments later prove to have been inaccurate, we may experience unexpected losses that could be substantial.

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Additionally, the processes we use to estimate our expected credit losses and to measure the fair value of financial instruments, as well as the processes used to estimate the effects of changing interest rates and other market measures on our financial condition and results of operations, depends upon the use of analytical and forecasting models. These models reflect assumptions that may not be accurate, particularly in times of market stress or other unforeseen circumstances. Even if these assumptions are adequate, the models may prove to be inadequate or inaccurate because of other flaws in their design or their implementation. If the models we use for interest rate risk and asset-liability management are inadequate, we may incur increased or unexpected losses upon changes in market interest rates or other market measures. If the models we use for determining our probable credit losses are inadequate, the allowance for credit losses may not be sufficient to support future charge-offs. If the models we use to measure the fair value of financial instruments are inadequate, the fair value of such financial instruments may fluctuate unexpectedly or may not accurately reflect what we could realize upon sale or settlement of such financial instruments. Any such failure in our analytical or forecasting models could have a material adverse effect on our business, financial condition and results of operations.

Technological advances in payment processing is expected to negatively impact our interchange revenue.

Interchange fees, or “swipe” fees, are charges that merchants pay to the processors who, in turn, share that revenue with us and other card-issuing banks for processing electronic payment transactions. Rapid, significant technological changes continue to confront the payments industry. Technological advances and the growth of e-commerce have made it possible for non-depository institutions to offer products and services that traditionally were banking products, and for financial institutions and other companies to provide electronic and internet-based financial solutions for processing electronic payment transactions. These include developments in smart cards, e-commerce, mobile and radio frequency and proximity payment devices, such as contactless cards. Ongoing or increased competition in payment processing may restrict our ability to generate interchange revenue in the future. For the year ended December 31, 2023, debit card interchange revenue represented 20.3% of our noninterest income.

Consumer protection laws and the Durbin Amendment will reduce our noninterest income.

We are subject to a number of federal and state consumer protection laws that extensively govern our relationship with our customers. The Dodd-Frank Act established the Consumer Financial Protection Bureau ("CFPB") with powers to supervise and enforce consumer protection laws. The CFPB has broad rule-making authority for a wide range of consumer protection laws that apply to all banks and savings institutions, including the authority to prohibit "unfair, deceptive or abusive acts and practices.” The CFPB also has examination and enforcement authority over all banks and savings institutions with more than $10 billion in assets for certain designated consumer laws and regulations. The other federal banking agencies enforce such consumer laws and regulations for banks and savings institutions under $10 billion in assets. These and other federal laws, among other things, require disclosures of the cost of credit and terms of deposit accounts, provide substantive consumer rights, prohibit discrimination in credit transactions, regulate the use of credit report information, provide financial privacy protections, prohibit unfair, deceptive and abusive practices and restrict our ability to raise interest rates and charge non-sufficient funds ("NSF") fees. A significant portion of our noninterest income is derived from service charge income, including NSF fees, which represented 15.1% of our noninterest income for the year ended December 31, 2023. Violations of applicable consumer protection laws could result in enforcement actions and significant potential liability from litigation brought by customers, including actual damages, restitution and attorneys’ fees. In addition, we are subject to political pressures that could limit our ability to charge NSF and overdraft fees.

In addition, the Durbin Amendment is a provision in the larger Dodd-Frank Act that gave the Federal Reserve the authority to establish rates on debit card transactions. The Durbin Amendment aims to control debit card interchange fees and restrict anti-competitive practices. The law applies to banks with over $10 billion in assets and limits these banks on what they charge for debit card interchange fees. The Company exceeded $10 billion in total assets at December 31, 2022. Pursuant to the Durbin Amendment of the Dodd-Frank Act, which began to apply to the Company on July 1, 2023, based on current run rates, annual pretax income from debit card interchange fees will be reduced by approximately $23 million.

We have businesses other than banking.

In addition to commercial banking services, we provide property and casualty and other insurance products, as well as other business and financial services. We may in the future develop or acquire other non-banking businesses. As a result of other such businesses, our earnings could be subject to risks and uncertainties that are different from those to which our commercial banking services are subject. In developing and marketing new lines of business and/or new products and services, we may invest significant time and resources. Initial timetables for the introduction and development of new lines of business and/or new products or services may not be achieved and price and profitability targets may not prove feasible. External factors, such as compliance with regulations, competitive alternatives, and shifting market preferences, may also impact the successful implementation of a new line of business or a new product or service. Furthermore, any new line of business and/or new product or service could have a significant impact on the

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effectiveness of our system of internal controls. Failure to successfully manage these risks in the development and implementation of new lines of business or new products or services could have a material adverse effect on our business, financial condition and results of operations.

Our information systems may experience an interruption or breach in security.

We rely heavily on communications and information systems to conduct our business. Any failure, interruption or breach in security of these systems could result in failures or disruptions in our customer relationship management, general ledger, deposit, loan and other systems. Information security breaches and cybersecurity-related incidents may include, but are not limited to, attempts to access information, including customer and company information, malicious code, computer viruses and denial of service attacks that could result in unauthorized access, misuse, loss or destruction of data (including confidential customer information), account takeovers, unavailability of service or other events. These types of threats may derive from human error, fraud or malice on the part of external or internal parties, or may result from accidental technological failure. Further, to access our products and services our customers may use computers and mobile devices that are beyond our security control systems. Our technologies, systems, networks and software and those of other financial institutions have been, and are likely to continue to be, the target of cybersecurity threats and attacks, which may range from uncoordinated individual attempts to sophisticated and targeted measures directed at us. The risk of a security breach or disruption, particularly through cyber-attack or cyber intrusion, has increased as the number, intensity and sophistication of attempted attacks and intrusions from around the world have increased.

Our business requires the collection and retention of large volumes of customer data, including personally identifiable information in various information systems that we maintain and in those maintained by third parties with whom we contract to provide data services. We also maintain important internal company data such as personally identifiable information about our employees and information relating to our operations. The integrity and protection of that customer and company data is important to us. Our collection of such customer and company data is subject to extensive regulation and oversight, which may increase in complexity and extent in the future. Our customers and employees have been, and will continue to be, targeted by parties using fraudulent e-mails and other communications in attempts to misappropriate passwords, bank account information or other personal information or to introduce viruses or other malware through “Trojan horse” programs to our information systems and/or our customers' computers. Though we endeavor to mitigate these threats through product improvements, use of encryption and authentication technology and customer and employee education, such cyber-attacks against us or our merchants and our third party service providers remain a serious issue. The pervasiveness of cybersecurity incidents in general and the risks of cybercrime are complex and continue to evolve. More generally, publicized information concerning security and cyber-related problems could inhibit the use or growth of electronic or web-based applications or solutions as a means of conducting commercial transactions.

Although we make significant efforts to maintain the security and integrity of our information systems and have implemented various measures to manage the risk of a security breach or disruption, there can be no assurance that our security efforts and measures will be effective or that attempted security breaches or disruptions would not be successful or damaging. Even the most well protected information, networks, systems and facilities remain potentially vulnerable because attempted security breaches, particularly cyber-attacks and intrusions, or disruptions will occur in the future, and because the techniques used in such attempts are constantly evolving and generally are not recognized until launched against a target, and in some cases are designed not to be detected and, in fact, may not be detected. Accordingly, we may be unable to anticipate these techniques or to implement adequate security barriers or other preventative measures, and thus it is virtually impossible for us to entirely mitigate this risk. While we maintain specific “cyber” insurance coverage, which would apply in the event of various breach scenarios, the amount of coverage may not be adequate in any particular case. Furthermore, because cyber threat scenarios are inherently difficult to predict and can take many forms, some breaches may not be covered under our cyber insurance coverage. A security breach or other significant disruption of our information systems or those related to our customers, merchants and our third party vendors, including as a result of cyber-attacks, could (i) disrupt the proper functioning of our networks and systems and therefore our operations and/or those of certain of our customers; (ii) result in the unauthorized access to, and destruction, loss, theft, misappropriation or release of confidential, sensitive or otherwise valuable information of ours or our customers; (iii) result in a violation of applicable privacy, data breach and other laws, subjecting us to additional regulatory scrutiny and expose us to civil litigation, enforcement action, governmental fines and possible financial liability; (iv) require significant management attention and resources to remedy the damages that result; or (v) harm our reputation or cause a decrease in the number of customers that choose to do business with us. The occurrence of any of the foregoing could have a material adverse effect on our business, financial condition and results of operations.

Risks Associated with Our Common Stock

The trading volume in our common stock is less than that of other larger financial services companies.

Although our common stock is listed for trading on the NASDAQ Global Select Market, the trading volume in our common stock is generally less than that of other, larger financial services companies. A public trading market having the desired characteristics of depth, liquidity and orderliness depends on the presence in the marketplace of willing buyers and sellers of our common stock at any given time. This presence depends on the individual decisions of investors and general economic and market conditions over which we

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have no control. Given the lower trading volume of our common stock, significant sales of our common stock, or the expectation of these sales, could cause our stock price to fall.

We may not continue to pay dividends on our common stock in the future.

We have historically paid a common stock dividend. However, as a bank holding company, our ability to declare and pay dividends is dependent on certain federal regulatory considerations, including the guidelines of the Federal Reserve Board regarding capital adequacy and dividends. Additionally, our ability to declare or pay dividends on our common stock may also be subject to certain restrictions in the event that we elect to defer the payment of interest on our junior subordinated deferrable interest debentures. There can be no certainty that our common dividend will continue to be paid at the current levels. It is possible that our common dividend could be reduced or even cease to be paid. In such case, the trading price of our common stock could decline, and investors may lose all or part of their investment.

Our directors and executive officers own a significant portion of our common stock and can influence stockholder decisions.

Our directors and executive officers, as a group, beneficially owned 33.55% of our outstanding common stock as of January 31, 2024. As a result of their ownership, the directors and executive officers have the ability for all practical purposes, by voting their shares in concert, to control the outcome of any matter submitted to our stockholders for approval, including the election of directors, which requires only a majority vote. The directors and executive officers may vote to cause us to take actions with which our other stockholders do not agree.

Our amended certificate of incorporation, as well as certain provisions of banking law and Oklahoma corporate law, could make it difficult for a third party to acquire our company.

Oklahoma corporate law and our amended certificate of incorporation contain provisions that could delay, deter or prevent a change in control of our management or us. Together, these provisions may discourage transactions that otherwise could provide for the payment of a premium over prevailing market prices of our common stock, and also could limit the price that investors are willing to pay in the future for shares of our common stock. Additionally, provisions of federal banking laws, including regulatory approval requirements, could make it more difficult for a third party to acquire us, even if doing so would be perceived to be beneficial to our shareholders. These provisions effectively inhibit a non-negotiated merger or other business combination, which, in turn, could adversely affect the market price of our common stock.

An investment in our common stock is not an insured deposit.

Our common stock is not a bank deposit and, therefore, is not insured against loss by the FDIC, any other deposit insurance fund or by any other public or private entity. Investment in our common stock inherently involves risk for the reasons described in this “Risk Factors” section and elsewhere in this report and is subject to the same market forces that affect the price of common stock in any company. As a result, if you acquire our common stock, you could lose some or all of your investment.

Our stock price can be volatile.

Stock price volatility may make it more difficult for you to resell your common stock when you want and at prices you find attractive. Our stock price can fluctuate significantly in response to a variety of factors including, among other things: actual or anticipated variations in quarterly results of operations; recommendations by securities analysts; operating and stock price performance of other companies that investors deem comparable to us; news reports relating to trends, concerns and other issues in the financial services industry; perceptions in the marketplace regarding us and/or our competitors; new technology used, or services offered by competitors; significant acquisitions or business combinations, strategic partnerships, joint ventures or capital commitments by or involving us or our competitors; failure to integrate acquisitions or realize anticipated benefits from acquisitions; changes in government regulations; and geopolitical conditions such as acts or threats of terrorism or military conflicts.

General market fluctuations, industry factors and general economic and political conditions and events, such as economic slowdowns or recessions, interest rate changes or credit loss trends, could also cause our stock price to decrease regardless of our operating results.

General Risk Factors

We rely on certain external vendors.

We are reliant upon certain external vendors to provide products and services necessary to maintain our day-to-day operations. These third party vendors are sources of operational and informational security risk to us, including risks associated with operational

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errors, information system interruptions or breaches and unauthorized disclosures of sensitive or confidential client or customer information. If these vendors encounter any of these issues, or if we have difficulty communicating with them, we could be exposed to disruption of operations, loss of service or connectivity to customers, reputational damage and enforcement and litigation risk that could have a material adverse effect on our business and, in turn, our financial condition and results of operations.

Changes in accounting standards could impact our consolidated financial statements and reported earnings.

Accounting standard-setting bodies, such as the Financial Accounting Standards Board, periodically change the financial accounting and reporting standards that affect the preparation of the consolidated financial statements. These changes are beyond our control and could have a meaningful impact on our consolidated financial statements.

If we fail to maintain an effective system of internal controls, we may not be able to accurately report our financial results or prevent fraud.

Effective internal controls are necessary for us to provide reliable financial reports and effectively prevent fraud. Any inability to provide reliable financial reports or prevent fraud could harm our business. The Sarbanes-Oxley Act of 2002 requires management and our auditors to evaluate and assess the effectiveness of our internal control over financial reporting. These requirements may be modified, supplemented or amended from time to time. Implementing these changes may take a significant amount of time and may require specific compliance training of our personnel. We have in the past discovered, and may in the future discover, areas of our internal control over financial reporting that need improvement. If our auditors or we discover a material weakness, the disclosure of that fact, even if quickly remedied, could reduce the market’s confidence in our consolidated financial statements and have an adverse effect on our stock price. We may not be able to effectively and timely implement necessary control changes and employee training to ensure continued compliance with the Sarbanes-Oxley Act and other regulatory and reporting requirements. Our historic growth and our expansion through acquisitions present challenges to maintaining the internal control and disclosure control standards applicable to public companies. If we fail to maintain effective internal controls, we could be subject to regulatory scrutiny and sanctions, our ability to recognize revenue could be impaired and investors could lose confidence in the accuracy and completeness of our financial reports. We cannot assure you that we will continue to fully comply with the requirements of the Sarbanes-Oxley Act or that management or our auditors will conclude that our internal control over financial reporting is effective in future periods.

We may need to raise additional capital in the future, and such capital may not be available when needed or at all.

We may need to raise additional capital in the future to provide us with sufficient capital resources and liquidity to meet our commitments and business needs, particularly if our asset quality or earnings were to deteriorate significantly. Our ability to raise additional capital, if needed, will depend on, among other things, conditions in the capital markets at that time, which are outside of our control and our financial performance. Economic conditions and the loss of confidence in financial institutions may increase our cost of funding and limit access to certain customary sources of capital, including inter-bank borrowings, repurchase agreements and borrowings from the discount window of the Federal Reserve Board.

We cannot assure that such capital will be available on acceptable terms or at all. Any occurrence that may limit our access to the capital markets, such as a decline in the confidence of debt purchasers, depositors or counterparties participating in the capital markets, or a downgrade of our debt ratings, may adversely affect our capital costs and our ability to raise capital and, in turn, our liquidity. Moreover, if we need to raise capital in the future, we may have to do so when many other financial institutions are also seeking to raise capital, and we would have to compete with those institutions for investors. An inability to raise additional capital on acceptable terms when needed could have a materially adverse effect on our businesses, financial condition and results of operations.

We rely heavily on our management team, and the unexpected loss of key managers may adversely affect our operations.

Our success to-date has been strongly influenced by our ability to attract and to retain senior management experienced in banking and financial services. Our ability to retain executive officers and the current management teams of each of our lines of business will continue to be important to the successful implementation of our strategies. We do not have employment or non-compete agreements with these key employees. The unexpected loss of services of any key management personnel, or the inability to recruit and retain qualified personnel in the future, could have an adverse effect on our business and financial results.

Item 1B. Unresolved Staff Comments.

None.

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Item 1C. Cybersecurity.

The Company recognizes the critical importance of maintaining the safety and security of its systems to protect its customers, maintain its reputation, and preserve the value of the Company and data and therefore have an enterprise-wide risk management framework for overseeing and managing cybersecurity and related risks. The process is supported by both management and its Board of Directors.

The Company relies heavily on sensitive information to run daily operations and deliver products and services. To protect the availability, integrity, and confidentiality of sensitive information and sensitive infrastructure, the Board of Directors requires the Company develop and implement a comprehensive Information Security Program, which focuses on the confidentiality, availability and security of information and systems. The Information Security Program defines the strategy that the Company uses to protect and secure its systems and media that process and maintain sensitive information. The program details the governance, management, operations, and assurance of the program, and seeks to identify, prevent and mitigate cyber threats and to respond effectively to cyber threats when they occur.

The cybersecurity function, is led by the Company's Chief Information Officer ("CIO"), who reports to The Company's Chief Operating Officer ("COO"). The Chief Information Security Officer ("CISO") reports to the CIO and generally is responsible for management of cybersecurity risk and the protection and defense of the Company's networks and systems. The CISO manages a team of cybersecurity professionals with broad experience and expertise, including threat assessments and detection, mitigation technologies, cybersecurity training, incident response, insider threats and regulatory compliance.

The Company has not, as of the date of this Form 10-K, experienced a cybersecurity threat or incident that resulted in a material adverse impact to its business or operations. Nevertheless, there are no assurances the Company will not experience such an incident in the future. Such incidents, whether or not successful, could result in the Company incurring significant costs related to, for example, rebuilding its internal systems, implementing additional threat protection measures, defending against litigation, responding to regulatory inquiries or actions, paying damages, risk of customers moving relationships with the Company to another institution, or taking other remedial steps with respect to third parties, as well as incurring significant reputational harm.

Board Oversight

Our Board of Directors is responsible for overseeing our enterprise risk management activities in general, and each of our Board committees assists the Board in the role of risk oversight. The full Board receives an update on the Company’s risk management process and the risk trends related to cybersecurity at least annually and receive reports on incidents that exceed certain thresholds and updates on responses thereto. The Information Security Committee is directly responsible for oversight of risks related to cybersecurity. The Board receives reports on information security and cybersecurity from the Information Security Committee at least four times a year.

Risk Management and Strategy

The Company continuously seeks to identify threats, vulnerabilities, and cybersecurity risks on information assets. Threats are identified through experience, regulatory requirements, information sharing, third party vendors, internal and external security assessments, and industry periodicals.

The risk assessment process identifies areas that are required to be protected and determine if adequate controls are used to safeguard the Company against threats and vulnerabilities. Adjustments required to adhere to regulatory changes are a regular function of the assessment process as well as changes to technologies, processes, and other factors. From the analyses, any additional controls are identified, prioritized and implemented.

Security Controls and Continuous Monitoring

Security controls and design are critical to mitigating risks. The Company works to protect its computing environments and products from cybersecurity threats through multi-layered defenses and applies lessons learned from its defense and monitoring efforts to help prevent future attacks. The Company utilizes data analytics to detect anomalies and monitor for possible cyber threats. The Company's Cybersecurity Operations Center provides comprehensive cyber threat detection and response capabilities and maintains a 24x7 monitoring system which complements the technology, processes and threat detection techniques the Company uses to monitor, manage and mitigate cybersecurity threats. From time to time, the Company engages third party consultants or other advisors to assist in assessing, identifying and/or managing cybersecurity threats. The Company's Internal Audit function also conducts information technology and cybersecurity reviews and assessments.

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Threat Intelligence

The Company considers threat intelligence from third party sources to strengthen systems and network preparedness for cybersecurity risks. The Company uses associations, such as the Financial Services Information Sharing and Analysis Center ("FS-ISAC"), to stay informed of threat information.

Third Party Risk Assessments

The Company conducts information security assessments before sharing or allowing the hosting of sensitive data in computing environments managed by third parties, and its standard terms and conditions contain contractual provisions requiring certain security protections.

Incident Response and Recovery Planning

The Company has established comprehensive incident response and recovery plans and continues to regularly test and evaluate the effectiveness of those plans. The Company's incident response and recovery plans address and guide its employees, management and the Board on its response to a cybersecurity incident.

Training and Awareness

The Company provides awareness training to its employees to help identify, avoid and mitigate cybersecurity threats. All employees with network access participate annually in required training, including spear phishing and other awareness training. The Company also periodically hosts tabletop exercises with management and other employees to practice cyber incident response.

Item 2. Properties.

The principal offices of the Company are located at 100 North Broadway Ave., Oklahoma City, Oklahoma 73102.

The Company owns substantially all of the properties and buildings in which its various offices and facilities are located. These properties include the main bank and 105 additional BancFirst branches in Oklahoma. The Company also owns properties in Oklahoma for future expansion. There are no significant encumbrances on any of these properties.

The Company’s wholly-owned subsidiary, Pegasus has three banking locations in Dallas, Texas. The main bank is located at 4515 W Mockingbird Ln, Dallas, TX 75209.

The Company’s wholly-owned subsidiary, Worthington has one banking location in Arlington, Texas, one in Colleyville, Texas, one in Denton, Texas and two in Fort Worth, Texas. The main bank is located at 200 W Main St, Arlington, TX 76010.

(See Note 6 - “Premises and Equipment, Net and Other Assets” to the Consolidated Financial Statements for further information on the Company’s properties).

Item 3. Legal Proceedings.

The Company has been named as a defendant in various legal actions arising from the conduct of its normal business activities. Although the amount of any liability that could arise with respect to these actions cannot be accurately predicted, in the opinion of the Company, any such liability will not have a material adverse effect on the consolidated financial statements of the Company.

Item 4. Mine Safety Disclosures.

None.

26

PART II

Item 5. Market for the Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Common Stock Market Prices and Dividends

The Company’s Common Stock is listed on the NASDAQ Global Select Market System (“NASDAQ/GS”) and is traded under the symbol “BANF”. As of January 31, 2024, there were 228 holders of record of our Common Stock.

Future dividend payments will be determined by the Company’s Board of Directors in light of the earnings and financial condition of the Company, BancFirst, Pegasus and Worthington, their capital needs, applicable governmental policies and regulations and such other factors as the Board of Directors deems appropriate.

BancFirst Corporation is a legal entity separate and distinct from BancFirst, Pegasus and Worthington, and its ability to pay dividends is substantially dependent upon dividend payments received from BancFirst. Various laws, regulations and regulatory policies limit BancFirst’s ability to pay dividends to BancFirst Corporation, as well as BancFirst Corporation’s ability to pay dividends to its stockholders. See “Liquidity and Funding” and “Capital Resources” under “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Item 1 - Business-Supervision and Regulation.” and Note (15) of the Notes to Consolidated Financial Statements for further information regarding limitations on the payment of dividends by BancFirst Corporation and BancFirst.

Stock Repurchases

The Company has adopted a Stock Repurchase Program (the “SRP”). The SRP may be used as a means to increase earnings per share and return on equity, to purchase treasury stock for the exercise of stock options or for distributions under the Deferred Stock Compensation Plan, to provide liquidity for optionees to dispose of stock from exercises of their stock options and to provide liquidity for stockholders wishing to sell their stock. All shares repurchased under the SRP have been retired and not held as treasury stock. The timing, price and amount of stock repurchases under the SRP may be determined by management and approved by the Company’s Executive Committee. At December 31, 2023, up to 479,784 shares could be repurchased under the Stock Repurchase Program. The amount approved is subject to amendment. The Stock Repurchase Program will remain in effect until all shares are repurchased.

No purchases were made by or on behalf of the Company or any “affiliated purchaser” (as defined in Rule 10b-18(a)(3) under the Securities Exchange Act of 1934), of the Company’s common stock during the three months ended December 31, 2023.

Equity Compensation Plan Information

Information regarding stock-based compensation awards outstanding and available for future grants as of December 31, 2023 is presented in the table below. All of the Company’s stock-based compensation plans have been approved by the Company’s stockholders. Additional information regarding stock-based compensation plans is presented in Note (13) – Stock-Based Compensation in the notes to consolidated financial statements included in Item 8. Financial Statements and Supplementary Data located elsewhere in this report.

	(a)		(b)		(c)
Plan Category	Number of Securities to be Issued Upon Exercise of Outstanding Options, Warrants and Rights		Weighted Average Exercise Price of Outstanding Options, Warrants and Rights		Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans (Excluding Securities Reflected in Column(a))
Equity compensation plans approved by security holders		1,393,041	$	52.78		486,111

Performance Graph

The Company’s performance graph is incorporated by reference from “Performance Graph” contained on the last page of this 10-K report.

Item 6. [Reserved]

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion and analysis presents factors that the Company believes are relevant to an assessment and understanding of the Company’s financial position and results of operations for the three years ended December 31, 2023. This discussion and analysis should be read in conjunction with the consolidated financial statements and notes thereto and the selected consolidated financial data included herein.

FORWARD-LOOKING STATEMENTS

The Company may make forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934 with respect to earnings, credit quality, corporate objectives, interest rates and other financial and business matters. Forward-looking statements include estimates and give management’s current expectations or forecasts of future events. The Company cautions readers that these forward-looking statements are subject to numerous assumptions, risks and uncertainties, including economic conditions; the performance of financial markets and interest rates; legislative and regulatory actions and reforms; competition; as well as other factors, all of which change over time. Examples of forward-looking statements include, but are not limited to: (i) projections of revenues, expenses, income or loss, earnings or loss per share, the payment or nonpayment of dividends, capital structure and other financial items; (ii) statements of plans, objectives and expectations, including those relating to products or services; (iii) statements of future economic performance; and (iv) statements of assumptions underlying such statements. Words such as “believes”, “anticipates”, “expects”, “intends”, “targeted”, “continue”, “remain”, “will”, “should”, “may” and other similar expressions are intended to identify forward-looking statements but are not the exclusive means of identifying such statements.

Forward-looking statements involve risks and uncertainties that may cause actual results to differ materially from those in such statements. Factors that could cause actual results to differ from those discussed in the forward-looking statements include, but are not limited to:

•The impact of the Durbin Amendment of the Dodd-Frank Act ("Durbin Amendment") on noninterest income beginning July 1, 2023.

•Potential impacts of the recent adverse developments in the banking industry driven by high-profile bank failures, including impacts on customer confidence, demand deposit outflows and the regulatory response thereto.

•Recent deterioration in the market for commercial office property could have an adverse effect on the value of the Company's other real estate owned as well as commercial office collateral for the Company's commercial real estate loans.

•Political pressures could further limit our ability to charge NSF and overdraft fees.

•A continuing shift in deposit mix could negatively impact net interest margin.

•Changes in interest rates.

•The increased time, effort and non-interest expense related to ongoing and increased regulations from the Federal Reserve, the Consumer Financial Protection Bureau and the Securities and Exchange Commission (requirements related to environmental, social and governance issues and climate disclosure).

•Local, regional, national and international economic conditions and the impact they may have on the Company and its customers.

•Changes in the mix of loan geographies, sectors and types or the level of non-performing assets and charge-offs.

•Inflation, including wage inflation, energy prices, securities markets and monetary fluctuations.

•Impairment of the Company’s goodwill or other intangible assets.

•Changes in consumer spending, borrowing and savings habits.

•Changes in the financial performance and/or condition of the Company’s borrowers, including the impact of rising interest rates.

•Technological changes.

•Cyber threats

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•The effect of changes in accounting policies and practices, as may be adopted by the regulatory agencies, as well as the Public Company Accounting Oversight Board, the Financial Accounting Standards Board and other accounting standard setters.

•The Company’s success at managing the risks involved in the foregoing items.

Actual results may differ materially from forward-looking statements.

SUMMARY

The Company’s net income for 2023 was $212.5 million, or $6.34 per diluted share, compared to $193.1 million, or $5.77 per diluted share for 2022.

In 2023, net interest income increased to $424.5 million, compared to $373.7 million in 2022. Rising short-term interest rates and loan growth contributed to the increase in net interest income in 2023. The Company’s net interest margin increased to 3.79% for 2023, compared to 3.29% for 2022.

The Company recorded a provision for credit losses of $7.5 million in 2023 compared to a provision for credit losses of $10.1 million in 2022. The Company's provision for credit losses decreased in 2023 due to improving economic forecasts.

Noninterest income totaled $185.4 million in 2023 compared to $183.7 million in 2022. The increase in noninterest income in 2023 was mostly attributable the increase in sweep fees of $12.2 million, partially offset by the reduction of interchange fees of approximately $10.9 million related to the impact of the Durbin Amendment since its application to the Company on July 1, 2023.

Noninterest expense was $332.5 million in 2023 compared to $309.9 million in 2022. Higher noninterest expenses in 2023 were primarily related to growth in salaries and employee benefits of $15.0 million related to both annual merit increases and new hires needed to comply with the increased regulatory burden associated with exceeding $10 billion in assets. In addition, 2023 included an expense from other real estate owned of $15.9 million compared to $9.9 million during 2022.

The Company’s effective tax rate in 2023 was 21.29% compared to 18.67% for 2022. During the first quarter of 2023, the Company adopted accounting standards update ("ASU") 2023-02, which increased income tax expense. The effective tax rate for 2023 was higher than the statutory rate due to the adoption of ASU 2023-02 and state tax expense. The effective tax rate for 2022 was lower than the statutory tax rate due to the recognition of certain tax credits.

The Company’s assets at year-end 2023 totaled $12.4 billion, virtually unchanged from December 31, 2022. Off-balance sheet sweep accounts totaled $4.3 billion at December 31, 2023 compared to $3.7 billion at December 31, 2022. Loans totaled $7.7 billion an increase of $710.3 million from year-end 2022. Deposits totaled $10.7 billion at December 31, 2023 a decrease of $274.1 million from December 31, 2022. The Company’s total stockholders’ equity was $1.4 billion, an increase of $183.1 million from December 31, 2022.

Asset quality remained strong with nonaccrual loans of $24.6 million, representing 0.32% of total loans at December 31, 2023. Nonaccrual loans were $15.3 million or 0.22% of total loans at December 31, 2022. The allowance for credit losses to total loans stood at 1.26% at December 31, 2023, compared to 1.33% at December 31, 2022. Net charge-offs were $3.4 million for the year or 0.05% of average loans, compared to $1.4 million or 0.02% of average loans for the year ended December 31, 2022.

See Note (2) of the Notes to Consolidated Financial Statements for disclosure regarding the Company’s recent developments, including mergers and acquisitions.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

The Company’s significant accounting policies are described in Note (1) to the consolidated financial statements. The preparation of financial statements in conformity with accounting principles generally accepted in the United States inherently involves the use of estimates and assumptions, which affect the amounts reported in the financial statements and the related disclosures. These estimates relate principally to the allowance for credit losses, income taxes, intangible assets and the fair value of financial instruments. Such estimates and assumptions may change over time and actual amounts realized may differ from those reported. The following is a summary of the accounting policies and estimates that management believes are the most critical.

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Allowance for Credit losses

On January 1, 2020, the Company adopted Accounting Standards Codification (“ASC”) 326, which replaced the incurred loss methodology for determining its provision for credit losses and allowance for credit losses with an expected loss methodology that is referred to as current expected credit loss ("CECL"). The allowance for credit losses is management’s estimate of the current expected credit losses on financial assets measured at amortized cost.

The allowance for credit losses is increased by provisions charged to operating expense and is reduced by net loan charge-offs. The amount of the allowance for credit losses is measured using relevant information about past events, including historical credit loss experience on financial assets with similar risk characteristics, current conditions, and reasonable and supportable forecasts that affect the collectability of the remaining cash flows over the contractual term of the financial assets. A loan is considered collateral-dependent when the repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty based on the Company's assessment as of the reporting date. For collateral dependent loans, the standard allows institutions to use, as a practical expedient, the fair value of the collateral to measure current expected credit losses on collateral-dependent financial assets. This amount is included in the allowance for credit losses.

To estimate expected losses using historical loss information, the Company elected to utilize a methodology known as vintage loss analysis for BancFirst, Pegasus, and Worthington Bank. Vintage loss analysis measures impairment based on the age of the accounts and the historical performance of assets with similar risk characteristics. Vintage loss analysis determines expected losses by allowing the Company to calculate the cumulative loss rates of a given loan pool and, in so doing, determine the loan pool’s lifetime expected loss experience relative to the appropriate type of financial assets that share similar risk characteristics. Vintage loss analysis uses different “vintages” analyzed by year of origination through the weighted average maturity of each loan pool. The key quantitative inputs used in the Company’s estimate of the allowance for credit losses include 1) all available loan data tracked by year of origination, 2) total charge-offs for each specific loan pool recorded since year of origination, 3) recovery rate calculated by the average recovery over the previous seven years across all loan pools, and 4) a weighting factor biased to more recent loss experience. The quantitative current expected credit loss is calculated by dividing each year’s net charge-offs by the original balance. The respective vintage’s original balance remains the denominator in each annual calculation, referencing the specific vintage’s initial balance. The loss experience of this original balance is tracked annually and summed over the life of the loan for each separate loan pool, leaving a cumulative life of credit loss rate based on historic averages weighted towards more recent loss experience. These key quantitative inputs change from period to period as new loans are originated, and charge-offs and recoveries are recognized. The recovery rate is revised on an annual basis, taking into consideration the most recent seven years. The weighting factor percentages remain static; however, the most recent year receives the highest weighting percentage.

The BancFirst Senior Loan Committee (“the SLC”) establishes BancFirst qualitative adjustments. In setting the qualitative adjustments, they consider several factors, including external economic information, peer bank comparisons, and experience with the loan portfolio. The SLC also considers a Moody’s Analytics dataset in which BancFirst selects a range from three probability scenarios from two economic forecasts. To determine the appropriate correlation to the loss experience, economic indicators are compared to the prior ten years of charge-off history to arrive at a correlation factor. BancFirst then applies the correlation factor to the change in the forecast of the aforementioned economic indicators over the next 18-24 months, which is driven by management’s judgment of a reasonable and supportable forecast period to arrive at a percentage range of qualitative loss adjustment attributable to economic forecasts. The SLC establishes a qualitative adjustment for each loan pool using these factors. For periods beyond which BancFirst can make or obtain reasonable and supportable forecasts of current expected credit losses, BancFirst reverts to historical loss information.

Each quarter the SLC reviews aggregate allowance for BancFirst and adjusts the appropriateness of the allowance. In addition, annually or more frequently as needed, the SLC evaluates the qualitative adjustments used in the BancFirst allowance based on the information described above. To facilitate the SLC’s evaluation, the Asset Quality Department performs periodic reviews of business units and reports on the adequacy of management’s identification of collateral-dependent and adversely classified loans and their adherence to loan policies and procedures.

The process of evaluating the appropriateness of the allowance for credit losses necessarily involves the exercise of judgment and consideration of numerous subjective factors and, accordingly, there can be no assurance that the estimate of expected losses will not change in light of future developments and economic conditions. Changes in assumptions and conditions could result in a materially different amount for the allowance for credit losses.

Income Taxes

The Company files a consolidated income tax return. Deferred taxes are recognized under the balance sheet method based upon the future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities, using the tax rates expected to apply to taxable income in the periods when the related temporary differences are expected to be realized.

30

The amount of accrued current and deferred income taxes is based on estimates of taxes due or receivable from taxing authorities either currently or in the future. Changes in these accruals are reported as tax expense or benefits, and involve estimates of the various components included in determining taxable income, tax credits, other taxes and temporary differences. Changes periodically occur in the estimates due to changes in tax rates, tax laws and regulations and implementation of new tax planning strategies. The process of determining the accruals for income taxes necessarily involves the exercise of considerable judgment and consideration of numerous subjective factors.

Management performs an analysis of the Company’s tax positions annually and believes it is more likely than not that all of its tax positions will be utilized in future years.

Intangible Assets and Goodwill

Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives of seven to ten years and customer relationship intangibles are amortized on a straight-line basis over the estimated useful life of three to eighteen years. Goodwill is not amortized, but is evaluated at a reporting unit level at least annually for impairment or more frequently if other indicators of impairment are present. At least annually in the fourth quarter, intangible assets, are evaluated for possible impairment. Impairment losses are measured by comparing the fair values of the intangible assets with their recorded amounts. Any impairment losses are reported in the consolidated statements of comprehensive income.

The evaluation of remaining core deposit intangibles for possible impairment involves reassessing the useful lives and the recoverability of the intangible assets. The evaluation of the useful lives is performed by reviewing the levels of core deposits of the respective branches acquired. The actual life of a core deposit base may be longer than originally estimated due to more successful retention of customers, or may be shorter due to more rapid runoff. Amortization of core deposit intangibles would be adjusted, if necessary, to amortize the remaining net book values over the remaining lives of the core deposits. The evaluation for recoverability is only performed if events or changes in circumstances indicate that the carrying amount of the intangibles may not be recoverable.

The evaluation of goodwill for possible impairment is performed by comparing the fair values of the related reporting units with their carrying amounts including goodwill. The fair values of the related business units are estimated using market data for prices of recent acquisitions of banks and branches.

The evaluation of intangible assets and goodwill for the year ended December 31, 2023 and 2022 resulted in no impairments.

Fair Value of Financial Instruments

Debt securities that are being held for indefinite periods of time, or that may be sold as part of the Company’s asset/liability management strategy, to provide liquidity or for other reasons, are classified as available for sale and are stated at estimated fair value. Unrealized gains or losses on debt securities available for sale are reported as a component of stockholders’ equity, net of income tax.

The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. The Company first assesses whether it intends to sell, or it is more-likely-than-not that it will be required to sell, the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities amortized cost basis is written down to fair value as a current period expense. If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. At December 31, 2023 and December 31, 2022, 98% of the available for sale debt securities held by the Company were issued by the U.S. Treasury, or U.S. government-sponsored entities and agencies. The Company does not consider the unrealized position of these securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for credit losses against its debt securities portfolio, as the credit risk is not material.

The estimates of fair values of debt securities and other financial instruments are based on a variety of factors. In some cases, fair values represent quoted market prices for identical or comparable instruments. In other cases, fair values have been estimated based on assumptions concerning the amount and timing of estimated future cash flows and assumed discount rates reflecting varying degrees of risk. Accordingly, the fair values may not represent actual values of the financial instruments that could have been realized as of year-end or that will be realized in the future.

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Future Application of Accounting Standards

See Note (1) of the Notes to Consolidated Financial Statements for a discussion of recently issued accounting pronouncements and their expected impact on the Company’s consolidated financial statements.

Segment Information

See Note (23) of the Notes to Consolidated Financial Statements for disclosure regarding the Company’s operating business segments.

RESULTS OF OPERATIONS

The following discussion and analysis presents the more significant factors that affected the Company's financial condition as of December 31, 2023 and 2022 and results of operations for each of the years then ended. Refer to Management’s Discussion and Analysis of Financial Condition and Results of Operations included in our Annual Report on Form 10-K filed with the SEC on February 24, 2023 (the “2022 Form 10-K”) for a discussion and analysis of the more significant factors that affected periods prior to 2022, which the Company incorporates by reference.

Certain reclassifications have been made to make prior periods comparable. This discussion and analysis should be read in conjunction with the Company's consolidated financial statements, notes thereto and other financial information appearing elsewhere in this report. From time to time, the Company has engaged in acquisitions. None of these acquisitions had a significant impact on the Company's consolidated financial statements. The Company accounts for acquisitions using the acquisition method, and as such, the results of operations of acquired companies are included from the date of acquisition forward.

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Average Balances, Income Expenses and Rates

The following tables present, for the periods indicated, certain information related to the Company's consolidated average balance sheet, average yields on assets and average costs of liabilities. Such yields are derived by dividing income or expense by the average balance of the corresponding assets or liabilities. For these computations: (i) average balances are derived from daily averages, (ii) information is shown on a taxable-equivalent basis assuming a 21% tax rate, and (iii) nonaccrual loans are included in the average loan balances and any interest on such nonaccrual loans is recognized on a cash basis. Loan fees included in interest income were $21.9 million for the year ended December 31, 2023 compared to $24.1 million for the year ended December 31, 2022 and $55.5 million for the year ended December 31, 2021.

CONSOLIDATED AVERAGE BALANCE SHEETS AND INTEREST MARGIN ANALYSIS
Taxable Equivalent Basis
(Dollars in thousands)
	December 31, 2023								December 31, 2022								December 31, 2021
				Interest		Average						Interest		Average						Interest		Average
	Average			Income/		Yield/			Average			Income/		Yield/			Average			Income/		Yield/
	Balance			Expense		Rate			Balance			Expense		Rate			Balance			Expense		Rate
ASSETS
Earning assets:
Loans (1)	$	7,292,871		$	467,951		6.42	%	$	6,611,617		$	336,739		5.09	%	$	6,220,192		$	316,618		5.09	%
Debt securities – taxable		1,565,697			36,838		2.35			1,295,762			24,456		1.89			538,157			6,327		1.18
Debt securities – tax exempt		3,339			91		2.71			3,877			118		3.03			11,372			258		2.27
Federal funds sold and interest-bearing    deposits with banks		2,343,182			119,486		5.10			3,450,093			58,931		1.71			3,268,443			4,366		0.13
Total earning assets		11,205,089			624,366		5.57			11,361,349			420,244		3.70			10,038,164			327,569		3.26
Nonearning assets:
Cash and due from banks		204,394								260,028								271,004
Interest receivable and other assets		814,419								865,744								694,191
Allowance for credit losses		(96,154	)							(87,567	)							(88,028	)
Total nonearning assets		922,659								1,038,205								877,167
Total assets	$	12,127,748							$	12,399,554							$	10,915,331
LIABILITIES AND STOCKHOLDERS’    EQUITY
Interest-bearing liabilities:
Money market and interest-bearing checking deposits	$	4,361,001		$	142,275		3.26	%	$	4,090,098		$	31,245		0.76	%	$	3,566,394		$	4,147		0.12	%
Savings deposits		1,087,642			29,575		2.72			1,147,673			6,402		0.56			1,019,042			542		0.05
Time deposits		797,179			23,196		2.91			672,179			4,318		0.64			654,801			3,543		0.54
Short-term borrowings		6,432			312		4.84			4,333			60		1.39			2,608			2		0.08
Subordinated debt		86,070			4,122		4.79			86,013			4,122		4.79			56,793			3,130		5.51
Total interest-bearing liabilities		6,338,324			199,480		3.15			6,000,296			46,147		0.77			5,299,638			11,364		0.21
Interest-free funds:
Noninterest-bearing deposits		4,343,646								5,097,813								4,437,352
Interest payable and other liabilities		108,438								102,691								52,069
Stockholders’ equity		1,337,340								1,198,754								1,126,272
Total interest free funds		5,789,424								6,399,258								5,615,693
Total liabilities and stockholders’ equity	$	12,127,748							$	12,399,554							$	10,915,331
Net interest income				$	424,886							$	374,097							$	316,205
Net interest spread							2.42	%							2.93	%							3.05	%
Effect of interest free funds							1.37	%							0.36	%							0.10	%
Net interest margin							3.79	%							3.29	%							3.15	%

33

The following table depicts, for the periods indicated, selected income statement data and other selected data:

BANCFIRST CORPORATION
SELECTED CONSOLIDATED FINANCIAL DATA
(Dollars in thousands, except per share data)
	At and for the Year Ended December 31,
	2023			2022			2021
Income Statement Data
Net interest income	$	424,456		$	373,673		$	315,657
Provision for (benefit from) credit losses		7,458			10,076			(8,690	)
Noninterest income		185,408			183,747			170,032
Noninterest expense		332,458			309,912			285,981
Net income		212,465			193,100			167,630
Per Common Share Data
Net income – basic	$	6.45		$	5.89		$	5.12
Net income – diluted		6.34			5.77			5.03
Cash dividends		1.66			1.52			1.40
Selected Financial Ratios
Performance ratios:
Return on average assets		1.75	%		1.56	%		1.54	%
Return on average stockholders’ equity		15.89			16.11			14.88
Cash dividends payout ratio		25.74			25.81			27.34
Net interest spread		2.42			2.93			3.05
Net interest margin		3.79			3.29			3.15
Efficiency ratio		54.51			55.60			58.88

Net Interest Income

Net interest income, which is the Company’s principal source of operating revenue, increased in 2023 by $50.8 million, to a total of $424.5 million, compared to an increase of $58.0 million in 2022. Rising short-term interest rates and loan growth contributed to the increase in 2023. Rising short-term interest rates and loan growth, along with net interest income related to the Worthington acquisition contributed to the increase in 2022. Net interest margin is shown in the preceding table.

During 2022, the Federal Reserve began raising interest rates to help slow inflation in the economy. The Company’s net interest income and net interest margin were impacted by the increases in interest rates.

Changes in the volume of earning assets and interest-bearing liabilities and changes in interest rates, determine the changes in net interest income. The following volume/rate analysis summarizes the relative contribution of each of these components to the changes in net interest income in 2023 and 2022. See “Maturity and Rate Sensitivity of Loans” for additional discussion.

34

VOLUME/RATE ANALYSIS

Taxable Equivalent Basis

	Change in 2023									Change in 2022
	Total			Due to Volume(1)			Due to Rate			Total			Due to Volume(1)			Due to Rate
	(Dollars in thousands)
INCREASE (DECREASE)
Interest Income:
Loans	$	131,212		$	34,533		$	96,679		$	20,121		$	2,524		$	17,597
Investments—taxable		12,382			5,164			7,218			18,129			9,474			8,655
Investments—tax exempt		(27	)		(22	)		(5	)		(140	)		(163	)		23
Interest-bearing deposits with banks and    federal funds sold		60,555			(18,805	)		79,360			54,565			264			54,301
Total interest income		204,122			20,870			183,252			92,675			12,099			80,576
Interest Expense:
Money market and interest-bearing checking deposits		111,030			3,148			107,882			27,098			541			26,557
Savings deposits		23,173			(357	)		23,530			5,860			69			5,791
Time deposits		18,878			826			18,052			775			136			639
Short-term borrowings		252			(28	)		280			58			1			57
Subordinated debt		—			2			(2	)		992			1,135			(143	)
Total interest expense		153,333			3,591			149,742			34,783			1,882			32,901
Net interest income	$	50,789		$	17,279		$	33,510		$	57,892		$	10,217		$	47,675
(1) The effects of changes in the mix of earning assets and interest-bearing liabilities have been combined with the changes due to volume.

Provision For and Benefit From Credit Losses

As shown in the selected consolidated financial table above, the Company recorded a provision for credit losses for 2023 and 2022, compared to a net benefit from reversal of provision for credit losses for 2021. The Company's provision for credit losses decreased in 2023 due to improving economic forecasts. In 2021, provisions for credit losses normalized after the economic downturn and recovery from the effects of the COVID pandemic in prior years, and acquired loans and loan growth led to an increase in the provision in 2022. The Company’s reversal of provision for 2021 was based on improvements in economic conditions and the Company’s outlook for certain economic indicators. The Company establishes an allowance as an estimate of the current expected credit losses in the loan portfolio at the balance sheet date. Management believes the allowance for credit losses is appropriate based upon management’s best estimate of expected losses within the existing loan portfolio. Should any of the factors considered by management in evaluating the appropriate level of the allowance for credit losses change, the Company’s estimate of current expected credit losses could also change, which could affect the amount of future provisions for credit losses. Net loan charge-offs were $3.4 million for 2023 compared to $1.4 million for 2022 and $7.0 million for 2021. The net charge-offs equated to 0.05%, 0.02% and 0.11% of average loans for 2023, 2022 and 2021, respectively. The rate of net charge-offs to average total loans continues to be at a low level. A more detailed discussion of the allowance for credit losses is provided under “Loans.”

Noninterest Income

Noninterest income is shown in the selected consolidated financial table above. Total noninterest income increased in 2023 due mostly to the increase in sweep account fees of $12.2 million resulting from higher yields and increased sweep account balances. This increase was partially offset by the reduction of interchange fees of approximately $10.9 million related to the impact of the Durbin Amendment, which took effect for the Company on July 1, 2023.

Other increases in noninterest income during 2023 included a $3.7 million increase in insurance commissions and a $3.1 million increase in trust revenue. The Company’s operating noninterest income has generally increased over time due to enhanced product lines, acquisitions and internal deposit account growth.

Noninterest income for 2022 included $9.3 million of income from an equity interest received from a prior loan settlement compared to $327,000 for 2023. The equity interest was sold during the second quarter of 2023 at no gain.

35

The Company earned $2.6 million on the sale of loans in 2023 compared $4.5 million in 2022 and $7.3 million in 2021. The income from sales of loans in 2023 was lower due to higher mortgage rates resulting in a decrease of originations. The income from sales of loans in 2021 was higher due to the increase in the volume of mortgage loans originated because of record low mortgage rates. The Company expects the volume of mortgage loans originated to increase during 2024 as mortgage rates begin to decrease.

The Company reported security transactions on the consolidated statements of comprehensive income totaling net losses of $1.8 million during each of 2023 and 2022, and a net gain of $1.0 million during 2021. These gains and losses related to its portfolio of debt securities and investments in equity securities carried in other assets. The Company’s practice is to maintain a liquid portfolio of debt securities and not engage in trading activities. The Company has the ability and intent to hold debt securities classified as available for sale that were in an unrealized loss position until they mature or until fair value exceeds amortized cost. In 2022, the Company recognized a loss of $4.0 million on the sale of $226 million of low yielding debt securities, which were subsequently reinvested at higher yielding debt securities. The Company also recognized a net loss of $1.8 million during 2023, a net gain of $2.2 million during 2022, and a net gain of $1.0 million during 2021, due to changes in the fair value of the equity securities.

Noninterest income included NSF and overdraft fees totaling $27.9 million, $26.0 million and $25.0 million in 2023, 2022 and 2021, respectively. This represents 15.1%, 14.2%, and 14.7% of the Company’s noninterest income for the years 2023, 2022 and 2021, respectively. In addition, the Company had debit card interchange fees totaling $37.6 million, $48.9 million and $46.0 million for the years 2023, 2022 and 2021, respectively. This represents 20.3%, 26.6% and 27.1% of the Company’s noninterest income for the years 2023, 2022 and 2021, respectively. The decrease in interchange fees in 2023 was due to the impact of the Durbin Amendments with took effect for the Company on July 1, 2023.

The Company is subject to political pressures that could limit our ability to charge NSF and overdraft fees. As of April 1, 2022, the Company lowered the rates charged on NSF and overdraft fees. Also, based on current run rates, annual pretax income from debit card interchange fees will be reduced by approximately $23 million from the impact of the Durbin Amendment.

Noninterest Expense

Total noninterest expense increased by $22.5 million, or 7.3% to $332.5 million for 2023. This compares to an increase of $23.9 million, or 8.4% to $309.9 million for 2022. Higher noninterest expenses in 2023 was primarily related to growth in salaries and employee benefits of $15.0 million related to both annual merit increases and new hires needed to comply with the increased regulatory burden associated with exceeding $10 billion in assets. In addition, net expense from other real estate owned increased $6.0 million, which was due to an increase of $1.5 million of write downs on other real estate owned, a $1.0 million increase in the cost of holding other real estate owned, and a decrease in gain on the sales of other real estate owned of $3.5 million. During 2022, the Company’s prior headquarters which were held in other real estate owned, was sold for a gain of $3.1 million. The Company's adoption of ASU 2023-02 in the first quarter of 2023 decreased other expense by $4.4 million due to the amortization of New Markets Tax Credits ("NMTC") and other tax credits that are now being recorded to income tax expense. Noninterest expense for 2022 included a write down of an equity investment of $1.5 million.

The increase in noninterest expense in 2022 was due to the increase in salaries and employee benefits of $18.3 million, noninterest expenses (including salaries and employee benefits) related to the Worthington acquisition, and an increase in deposit insurance. In addition, net expense from other real estate owned increased $822,000, which was due to an increase of $3.2 million of write downs on other real estate owned and a $1.3 million increase in the cost of holding other real estate owned, offset by an increase in gain on the sales of other real estate owned of $3.6 million.

Noninterest expense included deposit insurance expense, which totaled $5.8 million for the year ended December 31, 2023, compared to $4.7 million for the year ended December 31, 2022 and $3.5 million for the year ended December 31, 2021.

Income Taxes

Income tax expense totaled $57.5 million in 2023, compared to $44.3 million in 2022 and $40.8 million in 2021. The effective tax rates for 2023, 2022 and 2021 were 21.3%, 18.7% and 19.6% respectively. The Company's adoption of ASU 2023-02 in the first quarter of 2023 increased income tax expense due to the amortization of $6.0 million of NMTC and other tax credits to income tax expense during the period that would have previously been recorded to other expense, which increased the effective tax rate by 2.22%. Exercises of stock options contributed to the lower effective tax rate in 2022.

36

The primary reasons for the difference between the Company’s effective tax rate and the federal statutory rate were tax-exempt income, nondeductible amortization, federal and state tax credits and state tax expense.

Certain financial information is prepared on a taxable equivalent basis to facilitate analysis of yields and changes in components of earnings. Average balance sheets, comprehensive income statements and other financial statistics are also presented on a taxable equivalent basis.

Impact of Inflation

The impact of inflation on financial institutions differs significantly from that of industrial or commercial companies. The assets of financial institutions are predominantly monetary, as opposed to fixed or nonmonetary assets such as premises, equipment and inventory. As a result, there is little exposure to inflated earnings by understated depreciation charges or significantly understated current values of assets. Although inflation can have an indirect effect by leading to higher interest rates, financial institutions are in a position to monitor the effects on interest costs and yields and respond to inflationary trends through management of interest rate sensitivity. Inflation can also have an impact on noninterest expenses such as salaries and employee benefits, occupancy, services and other costs.

Impact of Deflation

In a period of deflation, it would be reasonable to expect widely decreasing prices for real assets. In such an economic environment, assets of businesses and individuals, such as real estate, commodities or inventory, could decline. The inability of customers to repay or refinance their loans could result in credit losses incurred by the Company far in excess of historical experience due to deflated collateral values.

37

FINANCIAL POSITION

BANCFIRST CORPORATION
SELECTED CONSOLIDATED FINANCIAL DATA
(Dollars in thousands, except per share data)
	At and for the Year Ended December 31,
	2023			2022
Balance Sheet Data
Total assets	$	12,372,042		$	12,387,863
Debt securities		1,555,095			1,540,604
Total loans (net of unearned interest)		7,660,134			6,949,795
Allowance for credit losses		96,800			92,728
Deposits		10,700,122			10,974,228
Subordinated debt		86,101			86,044
Stockholders’ equity		1,433,891			1,250,836
Book value per share		43.54			38.05
Tangible book value per share (non-GAAP)(1)		37.50			31.90
Reconciliation of Tangible Book Value per Common Share (non-GAAP)(2)
Stockholders’ equity	$	1,433,891		$	1,250,836
Less goodwill		182,263			182,055
Less intangible assets, net		16,704			19,983
Tangible stockholders' equity (non-GAAP)	$	1,234,924		$	1,048,798
Common shares outstanding		32,933,018			32,875,560
Tangible book value per share (non-GAAP)	$	37.50		$	31.90
Selected Financial Ratios
Performance Ratios:
Return on average assets		1.75	%		1.56	%
Return on average stockholders' equity		15.89			16.11
Cash dividends payout ratio		25.74			25.81
Net interest spread		2.42			2.93
Net interest margin		3.79			3.29
Efficiency ratio		54.51			55.60
Balance Sheet Ratios:
Average loans to deposits		68.87	%		60.06	%
Average earning assets to total assets		92.93			91.63
Average stockholders’ equity to average assets		11.03			9.67
Asset Quality Ratios:
Nonaccrual loans to total loans		0.32	%		0.22	%
Allowance for credit losses to total loans		1.26			1.33
Allowance for credit losses to nonaccrual loans		393.92			606.10
Net charge-offs to average loans		0.05			0.02
(1) Refer to the "Reconciliation of Tangible Book Value per Common Share (non-GAAP)" Table
(2) Tangible book value per common share is stockholders' equity less goodwill and intangible assets, net, divided by common shares outstanding.
This amount is a non-GAAP financial measure but has been included as it is considered to be a critical metric with which to analyze and evaluate
the financial condition and capital strength of the Company. This measure should not be considered a substitute for operating results determined in accordance with GAAP.

Cash, Federal Funds Sold and Interest-Bearing Deposits with Banks

Cash consists of cash and cash items on hand, noninterest-bearing deposits and amounts due from other banks, reserves deposited with the Federal Reserve Bank, and interest-bearing deposits with other banks. Federal funds sold consist of overnight investments of excess funds with other financial institutions. The Company has continued to maintain the majority of its excess funds with the Federal Reserve Bank. The Federal Reserve Bank pays interest on these funds based upon the lowest target rate for the maintenance period, which increased during 2023 from 4.50% to 5.50%. The rate increased from 0.25% to 4.50% during 2022.

38

The amount of cash, federal funds sold and interest-bearing deposits with the Federal Reserve Bank carried by the Company is a function of the availability of funds presented to other institutions for clearing and the Company’s liquidity and interest rate sensitivity management. Balances of these items can fluctuate widely based on these various factors. The aggregate of cash and due from banks, federal funds sold and interest-bearing deposits with banks decreased by $773.0 million, or 24.4%, to $2.4 billion, from December 31, 2022 to December 31, 2023. The decrease was primarily due to the movement of some large commercial deposits into the Company's off-balance sheet sweep account product and loan growth.

Securities

For the year ended December 31, 2023, total debt securities increased $14.5 million. Debt securities available for sale represented 99.9% of the total debt securities portfolio at both December 31, 2023 and December 31, 2022. Debt securities available for sale had a net unrealized loss of $65.5 million at December 31, 2023, compared to a net unrealized loss of $93.7 million at December 31, 2022. These unrealized losses are included in the Company’s stockholders’ equity as accumulated other comprehensive loss, net of income tax, in the amounts of a loss of $50.0 million and a loss of $71.6 million for December 31, 2023 and 2022, respectively. The Company did not recognize a gain or loss on debt securities during the year ended December 31, 2023. During the year ended December 31, 2022, the Company had a loss of $4.0 million resulting from the sale of $226 million of debt securities with an average yield of 0.16%, which was subsequently reinvested in $220 million of debt securities with an average yield of 1.86%. The Company purchased a total of $454.0 million of debt securities in 2023 compared to $1.9 billion of debt securities in 2022.

The Company does not engage in securities trading activities. Any sales of debt securities are for the purpose of executing the Company’s asset/liability management strategy, eliminating a perceived credit risk in a specific security, or providing liquidity. Debt securities that are being held for indefinite periods of time, or that may be sold as part of the Company’s asset/liability management strategy, to provide liquidity, or for other reasons, are classified as available for sale and are stated at estimated fair value. Unrealized gains or losses on debt securities available for sale are reported as a component of stockholders’ equity, net of income tax. Debt securities for which the Company has the intent and ability to hold to maturity are classified as held for investment and are stated at cost, adjusted for amortization of premiums and accretion of discounts computed under the interest method.

Management has the ability and intent to hold the debt securities classified as held for investment until they mature, at which time the Company will receive full value for the securities. Furthermore, the Company also has the ability and intent to hold the debt securities classified as available for sale for a period of time sufficient for a recovery of cost. As of December 31, 2023, the Company had net unrealized losses largely due to increases in market interest rates over the yields available at the time the underlying securities were purchased. The fair value of those securities having unrealized losses is expected to recover as the securities approach their maturity date or repricing date, or if market yields for similar investments decrease. Furthermore, as of December 31, 2023, management had no intent or requirement to sell before the recovery of the unrealized loss.

See Note (4) of the Notes to Consolidated Financial Statements for disclosures regarding the Company’s Securities.

39

WEIGHTED AVERAGE YIELD OF DEBT SECURITIES

The following table summarizes the maturity distribution schedule with corresponding weighted average taxable equivalent yields of the debt securities portfolio at December 31, 2023. The following table presents securities at their expected maturities, which may differ from contractual maturities. The Company manages its debt securities portfolio for liquidity, as a tool to execute its asset/liability management strategy, and for pledging requirements for public funds. For the interest rate sensitivity of debt securities see the table in item 7A.

	Within One Year						After One Year But Within Five Years						After Five Years But Within Ten Years						After Ten Years						Total
	Amount			Yield*			Amount			Yield*			Amount			Yield*			Amount			Yield*			Amount			Yield*
	(Dollars in thousands)
Held for Investment
Mortgage-backed securities	$	3			10.44	%	$	2			4.69	%	$	—			—	%	$	—			—	%	$	5			6.46	%
State and political subdivisions		350			3.38			335			3.06			—			—			—			—			685			3.22
Other securities		—			—			500			0.10			—			—			—			—			500			0.10
Total	$	353			3.43		$	837			1.29		$	—			—		$	—			—		$	1,190			1.92
Percentage of total		29.7	%					70.3	%					—	%					—	%					100.0	%
Available for Sale
U.S. Treasury, other federal agencies    and mortgage-backed securities	$	337,766			2.05	%	$	1,167,939			2.21	%	$	11,471			4.45	%	$	7,434			3.91	%	$	1,524,610			2.20	%
State and political subdivisions		4,027			3.38			5,181			4.54			270			1.48			532			3.95			10,010			3.96
Asset backed securities		—			—			—			—			12,512			6.38			—			—			12,512			6.38
Other securities		—			—			159			3.14			6,614			4.92			—			—			6,773			4.88
Total	$	341,793			2.07		$	1,173,279			2.22		$	30,867			5.31		$	7,966			3.92		$	1,553,905			2.25
Percentage of total		22.0	%					75.5	%					2.0	%					0.5	%					100.0	%
Total debt securities	$	342,146			2.07	%	$	1,174,116			2.22	%	$	30,867			5.31	%	$	7,966			3.92	%	$	1,555,095			2.25	%
Percentage of total		22.0	%					75.5	%					2.0	%					0.5	%					100.0	%
* Yield is on a taxable-equivalent basis using a 21% tax rate.

40

Loans

The Company has historically generated loan growth from both internal originations and bank acquisitions. Total loans held for investment increased $713.1 million, or 10.2%, to $7.7 billion in 2023, as a result of internal loan growth. Of the total increase in loans, residential real estate loans made up the largest increase with $189.3 million, or 26.7% of the increase, construction and development loans increased $167.4 million, or 23.6%, and oil and gas loans increasing $123.6 million, or 17.4%. At December 31, 2023, oil and gas loans comprise 7.7% of loans compared to 6.7% at December 31, 2022. The increase of internal loan growth was 76% from the Company's Oklahoma subsidiary BancFirst and 24% from the Company's Texas subsidiaries Pegasus and Worthington.

Composition

The Company’s loan portfolio was diversified among various types of commercial and individual borrowers. Commercial loans were comprised principally of loans to companies in real estate, light manufacturing, retail and service industries. Consumer non-real estate loans were comprised primarily of loans to individuals for automobiles.

LOANS HELD FOR INVESTMENT BY CATEGORY

	December 31,
	2023					2022
	Amount		% of Total			Amount		% of Total
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	960,944		12.55	%	$	908,494		13.08	%
Commercial real estate non-owner occupied		1,486,420		19.42			1,383,150		19.92
Construction and development < 60 months		642,643		8.39			475,236		6.84
Construction residential real estate < 60 months		283,486		3.70			303,305		4.37
Residential real estate first lien		1,258,744		16.44			1,117,899		16.10
Residential real estate all other		244,696		3.20			196,198		2.83
Agriculture		427,139		5.58			408,037		5.88
Commercial non-real estate		1,289,452		16.84			1,241,454		17.88
Consumer non-real estate		476,467		6.22			446,756		6.43
Oil and gas		586,654		7.66			463,034		6.67
Total loans	$	7,656,645		100.00	%	$	6,943,563		100.00	%

See Note (1) and Note (5) of the Notes to Consolidated Financial Statements for additional disclosures regarding the Company’s loans.

LOANS BY MATURITY AND INTEREST RATE SENSITIVITY

The information relating to the maturity and interest rate sensitivity of loans is based upon contractual maturities and original loan terms. In the ordinary course of business, loans maturing within one year may be renewed, in whole or in part, at interest rates prevailing at the date of renewal.

41

The following table presents the maturity distribution of loans held for investment at December 31, 2023. Many of the loans with maturities of one year or less are renewed at existing or similar terms after scheduled principal reductions. Also, approximately 57% of loans had adjustable interest rates at December 31, 2023.

	Loans Maturing
	Within One Year			After One But Within Five Years			After Five Years But Within Fifteen Years			After Fifteen Years			Total
December 31, 2023	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	88,565		$	186,168		$	501,122		$	185,089		$	960,944
Commercial real estate non-owner occupied		190,090			573,359			622,325			100,646			1,486,420
Construction and development < 60 months		264,471			291,901			56,254			30,017			642,643
Construction residential real estate < 60 months		250,990			15,895			3,335			13,266			283,486
Residential real estate first lien		73,852			134,425			433,188			617,279			1,258,744
Residential real estate all other		53,316			81,767			61,506			48,107			244,696
Agriculture		103,081			74,698			120,000			129,360			427,139
Commercial non-real estate		422,086			545,917			282,662			38,787			1,289,452
Consumer non-real estate		48,579			307,758			118,356			1,774			476,467
Oil and gas		233,477			333,008			16,441			3,728			586,654
Total loans	$	1,728,507		$	2,544,896		$	2,215,189		$	1,168,053		$	7,656,645
Percentage of total		22.58	%		33.24	%		28.93	%		15.25	%		100.00	%

The interest rate composition of loans with a maturity date over one year are presented below based on contractual terms.

	Loans Maturing after One Year
	Predetermined (Fixed) Interest Rate		Floating Interest Rate		Total
December 31, 2023	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	294,397	$	577,982	$	872,379
Commercial real estate non-owner occupied		701,512		594,818		1,296,330
Construction and development < 60 months		137,108		241,064		378,172
Construction residential real estate < 60 months		13,409		19,087		32,496
Residential real estate first lien		263,242		921,650		1,184,892
Residential real estate all other		42,524		148,856		191,380
Agriculture		74,413		249,645		324,058
Commercial non-real estate		475,501		391,865		867,366
Consumer non-real estate		415,422		12,466		427,888
Oil and gas		84,302		268,875		353,177
Total	$	2,501,830	$	3,426,308	$	5,928,138

NONPERFORMING ASSETS

The following table summarizes nonperforming assets.

	December 31,
	2023		2022
	(Dollars in thousands)
Past due 90 days or more and still accruing	$	9,542	$	7,085
Nonaccrual (1)		24,573		15,299
Total nonperforming loans		34,115		22,384
Other real estate owned and repossessed assets		34,200		36,936
Total nonperforming assets	$	68,315	$	59,320
(1) Government agencies guarantee approximately $6.7 million of nonaccrual loans at December 31, 2023, and $4.7 million at December 31, 2022.

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Nonaccrual Loans

Nonaccrual loans totaled $24.6 million at December 31, 2023, compared to $15.3 million at December 31, 2022. The Company’s nonaccrual loans are primarily commercial non-real estate loans. Nonaccrual loans negatively impact the Company’s net interest margin. A loan is placed on nonaccrual status when, in the opinion of management, the future collectability of both interest and principal is in serious doubt. Interest income is not recognized until the principal balance is fully collected. However, if the full collection of the remaining principal balance is not in doubt, interest income is recognized on certain of these loans on a cash basis. Had nonaccrual loans performed in accordance with their original contractual terms, the Company would have recognized additional interest income of $1.6 million for 2023, $1.3 million for 2022 and $2.2 million for 2021. Only a small amount of this interest is expected to be ultimately collected.

The classification of a loan as nonaccrual does not necessarily indicate that loan principal and interest will ultimately be uncollectible; although, in an economic downturn, the Company’s experience has been that the level of collections decline. The above normal risk associated with nonaccrual loans has been considered in the determination of the allowance for credit losses. The level of nonaccrual loans and credit losses could rise over time as a result of adverse economic conditions. At December 31, 2023, the allowance for credit losses as a percentage of nonaccrual loans was 393.9%, compared to 606.1%, at the end of 2022.

Modified Loans

As of January 1, 2023, the Company adopted ASU No. 2022-02, which eliminates the Troubled Debt Restructurings (“TDR”) recognition and measurement guidance and, instead, requires that the Company evaluate, based on the accounting for loan modifications, whether the modification represents a new loan or a continuation of an existing loan when a borrower is experiencing financial difficulty. The current and future financial effects of the recorded balance of loans considered to be modified during the period were not considered to be material. The recorded balance of modified loans was approximately $5.3 million for the year ended December 31, 2023.

Other Real Estate Owned and Repossessed Assets

Other real estate owned ("OREO") and repossessed assets decreased $2.7 million in 2023. OREO consists of properties acquired through foreclosure proceedings or acceptance of a deed in lieu of foreclosure and premises held for sale. These properties are carried at the lower of the book values of the related loans or fair values based upon appraisals, less estimated costs to sell. Write-downs arising at the time of reclassification of such properties from loans to OREO are charged directly to the allowance for credit losses. Any losses on bank premises designated to be sold are charged to operating expense at the time of transfer from premises to OREO. Decreases in values of properties subsequent to their classification as OREO are charged to operating expense. The Company's write-downs in OREO totaled $5.2 million for 2023, $3.7 million for 2022 and $538,000 for 2021.

OREO included a larger commercial real estate property recorded at $29.4 million at December 31, 2023 and December 31, 2022. Rental income for this property is included in other noninterest income on the consolidated statements of comprehensive income. Operating expense for this property is included in net expense from OREO in other noninterest expense on the consolidated statements of comprehensive income.

This property had the following rental income and operating expenses for the periods presented.

	For the Year Ended December 31,
	2023		2022		2021
Rental income	$	11,224	$	10,340	$	9,975
Operating expense		10,868		9,863		8,727

The Company's total rental income and operating expenses from OREO are presented in the following table:

	For the Year Ended December 31,
	2023		2022		2021
Rental income	$	11,801	$	10,877	$	10,298
Operating expense		11,429		10,450		9,169

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Allowance for Credit Losses/Fair Value Adjustments on Acquired Loans

The Company determines its provision for credit losses and allowance for credit losses using the expected loss methodology that is referred to as the CECL model. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist. At December 31, 2023, the allowance for credit losses to total loans stood at 1.26% of total loans, compared to 1.33% at December 31, 2022, due to improved economic forecasts.

The overall credit quality of the Company’s loan portfolio has remained strong. Net charge-offs were $3.4 million and $1.4 million for the years ended 2023 and 2022, respectively. The amount of net loan charge-offs is relatively low, equating to 0.05% and 0.02% of average total loans for the years ended December 31, 2023 and 2022, respectively. If unforeseen adverse changes occur in the national or local economy, or in the credit markets, it would be reasonable to expect that the allowance for credit losses would increase in future periods.

ANALYSIS OF ALLOWANCE FOR CREDIT LOSSES

The following table is a break-out of the allowance for credit losses:

	Year Ended December 31,
	2023		2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	7,483	$	6,416
Commercial real estate non-owner occupied		33,080		30,190
Construction and development < 60 months		3,950		3,778
Construction residential real estate < 60 months		3,414		3,275
Residential real estate first lien		4,914		4,092
Residential real estate all other		1,646		1,418
Agriculture		6,137		6,217
Commercial non-real estate		22,745		25,106
Consumer non-real estate		4,401		4,132
Oil and gas		9,030		8,104
Total	$	96,800	$	92,728

The following table is a break-out of net charge-offs/(recoveries) and the break-out of the percent of average loans in each category:

	December 31,
	2023						2022
	Amount			% of Avg Loans			Amount			% of Avg Loans
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	854			0.01	%	$	(487	)		0.00	%
Commercial real estate non-owner occupied		3			—			—			—
Construction and development < 60 months		(5	)		—			81			—
Construction residential real estate < 60 months		94			—			—			—
Residential real estate first lien		150			—			19			—
Residential real estate all other		55			—			(367	)		—
Agriculture		369			0.01			192			—
Commercial non-real estate		639			0.01			1,342			0.02
Consumer non-real estate		1,168			0.02			575			—
Oil and gas		59			—			—			—
Total	$	3,386			0.05	%	$	1,355			0.02	%

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Fair Value Adjustments on Acquired Loans

The fair value adjustment on acquired loans can consist of a credit component and a rate component to adjust for estimated credit exposures in the acquired loans. The credit component of the adjustment was a $1.6 million discount at December 31, 2023 and a $2.2 million discount at December 31, 2022. The rate component was $568,000 at December 31, 2023 and $738,000 at December 31, 2022. These fair value adjustments will be accreted to income over the remaining life of the loans. The acquired loans outstanding were $262.7 million and $263.5 million, at December 31, 2023 and 2022, respectively.

Intangible Assets, Goodwill and Other Assets

Identifiable intangible assets and goodwill totaled $199.0 million and $202.0 million at December 31, 2023 and December 31, 2022, respectively.

On July 20, 2023, the Company recorded a core deposits intangible of approximately $252,000 because of the purchase of assets and assumption of liabilities from RCB Bank's Stroud, Oklahoma branch. See Note (2) of the Notes to Consolidated Financial Statements for disclosure regarding the Company’s recent developments, including mergers and acquisitions.

Other assets includes the cash surrender value of key-man life insurance policies totaling $84.4 million at December 31, 2023 and $82.7 million at December 31, 2022.

Equity securities are reported in other assets on the balance sheet. The Company invests in equity securities without readily determinable fair values. These equity securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income. The balance of equity securities was $13.1 million at December 31, 2023 and $15.5 million at December 31, 2022. The Company reviews its portfolio of equity securities for impairment at least quarterly.

The balance of other assets at December 31, 2022 included an equity interest of $21.4 million related to a former borrower in the oil and gas industry, which was received through bankruptcy proceedings. This equity interest was sold during the second quarter of 2023 resulting in a zero balance at December 31, 2023. Under the equity method, the carrying value of a bank’s investment in an investee is originally recorded at cost but is adjusted periodically to record as income the bank’s proportionate share of the investee’s earnings or losses and decreased by the amount of cash dividends or similar distributions received from the investee.

Low Income Housing and New Market Tax Credit Investments

The Company’s low income housing tax credit ("LIHTC") investments were $46.4 million and $24.7 million at December 31, 2023 and 2022, respectively and are included in other assets on the consolidated balance sheet. The Company’s NMTC investments were $12.1 million and $11.3 million at December 31, 2023 and 2022, respectively and are included in other assets on the consolidated balance sheet.

The increase in 2023 was due to the Company adopting ASU 2023-02 on January 1, 2023. As a result of the adoption of ASU No. 2023-02, the Company recorded $25.1 million in other assets and other liabilities on the consolidated balance sheet during 2023 for unfunded LIHTC commitments and amortized $6.0 million of NMTC and other tax credit investments to income tax expense during the period that would have previously been recorded to other expense. See Note (6) of the Notes to Consolidated Financial Statements for disclosures regarding these investments.

Liquidity and Funding

The Company’s principal source of liquidity and funding is its broad deposit base generated from customer relationships. The availability of deposits is affected by economic conditions, competition with other financial institutions and alternative investments available to customers. Through interest rates paid, service charge levels and services offered, the Company can affect its level of deposits to a limited extent. The level and maturity of funding necessary to support the Company’s lending and investment functions is determined through the Company’s asset/liability management process. The Company currently does not rely heavily on long-term borrowings and does not utilize brokered CDs. The Company maintains lines of credit from the Federal Home Loan Bank (“FHLB”), federal funds lines of credit with other banks and could also utilize the sale of loans, securities and liquidation of other assets as sources of liquidity and funding. Although the percent of cash and due from banks, interest-bearing deposits with banks and federal funds sold to total assets has decreased to 19.4% at December 31, 2023, compared to 25.6% at December 31, 2022, the Company is still highly

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liquid. The decrease was primarily due to the movement of some large commercial deposits into the Company's off-balance sheet sweep account product and loan growth.

Historically, BancFirst has more liquidity than its peers. This liquidity positions BancFirst to respond to increased loan demand and other requirements for funds, or to decreases in funding sources. The liquidity of BancFirst Corporation, however, is dependent upon dividend payments from BancFirst and its ability to obtain financing and or raise capital. Banking regulations limit bank dividends based upon net earnings retained by BancFirst and minimum capital requirements. Dividends in excess of these limits require regulatory approval. At January 1, 2024, BancFirst had approximately $145.7 million of equity available for dividends to BancFirst Corporation without regulatory approval. During 2023, BancFirst declared four common stock dividends totaling $61.7 million, two preferred stock dividends totaling $1.9 million and one special dividend totaling $50.0 million to BancFirst Corporation. During 2023, Pegasus declared one special dividend totaling $10.0 million to BancFirst Corporation. There are no near term plans for Worthington to pay dividends to BancFirst Corporation.

Deposits

At December 31, 2023, deposits totaled $10.7 billion, a decrease of $274.1 million from December 31, 2022 as some large commercial deposits moved into the Company's off balance sheet sweep account product. The Company’s core deposits provide it with a stable, low-cost funding source. The Company’s core deposits as a percentage of total deposits was 97.4% at December 31, 2023 and 98.1% December 31, 2022. Noninterest-bearing deposits to total deposits were 37.2% at December 31, 2023, compared to 45.1% at December 31, 2022. Competition for deposits has recently increased and available yields have similarly increased, causing non-interest bearing deposits to move to interest bearing deposits and off balance sheet sweep account products.

Uninsured deposits are defined as the portion of deposit accounts in U.S. offices that exceed the FDIC insurance limit and amounts in any other uninsured investment or deposit account that are classified as deposits and are not subject to any federal or state deposit insurance regimes. Total uninsured deposits were $3.2 billion and $3.6 billion at December 31, 2023 and 2022, respectively, as calculated per regulatory guidance. This was approximately 30% and 33% of deposits at December 31, 2023 and 2022, respectively.

Off-balance sheet sweep accounts totaled $4.3 billion at December 31, 2023, compared to $3.7 billion at December 31, 2022. The movement of customers' funds into the Company's sweep accounts affected the balances of both cash and deposits.

ANALYSIS OF AVERAGE DEPOSITS

	Year Ended December 31,
	2023		2022
	(Dollars in thousands)
Average Balances
Noninterest-bearing demand deposits	$	4,343,646	$	5,097,813
Money market and interest-bearing checking deposits		4,361,001		4,090,098
Savings deposits		1,087,642		1,147,673
Time deposits		797,179		672,179
Total deposits	$	10,589,468	$	11,007,763

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PERCENTAGE OF TOTAL AVERAGE DEPOSITS AND AVERAGE RATES PAID

	Year Ended December 31,
	2023						2022
	% of Total			Rate			% of Total			Rate
Noninterest-bearing demand deposits		41.02	%					46.31	%
Money market and interest-bearing checking deposits		41.18			3.26	%		37.15			0.76	%
Savings deposits		10.27			2.72			10.43			0.56
Time deposits		7.53			2.91			6.11			0.64
Total deposits		100.00	%					100.00	%
Average rate paid on interest-bearing deposits					3.12	%					0.71	%

MATURITY OF TIME DEPOSITS

The following table shows the maturity of time deposits that are in excess of the Federal Deposit Insurance Corporation's insurance limit:

	December 31, 2023
	(Dollars in thousands)
Three months or less	$	29,195
Over three months through six months		48,134
Over six months through twelve months		66,794
Over twelve months		17,939
Total	$	162,062

At December 31, 2023, 88.9% of the Company’s uninsured time deposits mature in one year or less.

Subordinated Debt

On June 17, 2021, the Company completed a private placement, under Regulation D of the Securities Act of 1933, of $60 million aggregate principal amount of 3.50% Fixed-to-Floating Rate Subordinated Notes due 2036 ("Subordinated Notes") to various institutional accredited investors. See Note (11) of the Notes to Consolidated Financial Statements for a complete discussion of the Company’s subordinated debt.

Short-Term Borrowings

See Note (9) of the Notes to Consolidated Financial Statements for a discussion of short-term borrowings.

Lines of Credit

See Note (10) of the Notes to Consolidated Financial Statements for a discussion of the Company’s lines of credit.

Capital Resources

Stockholders’ equity totaled $1.4 billion at December 31, 2023, compared to $1.3 billion at December 31, 2022. In addition to net income of $212.5 million, other changes in stockholders’ equity during the year ended December 31, 2023 included $2.5 million related to common stock issuances for stock option exercises, $3.0 million related to stock-based compensation, and a $21.5 million increase in other comprehensive income, that were partially offset by $54.7 million in dividends and $1.8 million in the repurchase of company stock. The Company’s average stockholders’ equity to average assets for 2023 was 11.03% compared to 9.67% for 2022. The Company’s leverage ratio and total risk-based capital ratios at December 31, 2023 were well in excess of the regulatory requirements. Banking institutions are generally expected to maintain capital well above the minimum levels. The Company’s trust preferred securities have continued to be included in Tier 1 capital, as the Company’s total assets do not exceed $15 billion. The Company’s Subordinated Notes have been structured to qualify as Tier 2 capital under bank regulatory guidelines.

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See Note (15) of the Notes to Consolidated Financial Statements for a discussion of capital ratio requirements.

See Note (11) of the Notes to Consolidated Financial Statements for disclosures regarding the Company’s Subordinated Debt.

On August 31, 2022, the Company filed with the Securities and Exchange Commission (“SEC”) an automatic shelf registration statement on Form S-3, which became effective upon filing with the SEC. Under the shelf registration, the Company may offer and sell, from time to time, an indeterminate amount of its common stock in one or more future offerings.

The Company has had a Stock Repurchase Program (the “SRP”) since November 1999. The SRP may be used as a means to increase earnings per share and return on equity, to purchase treasury stock for the exercise of stock options or for distributions under the Deferred Stock Compensation Plan, to provide liquidity for optionees to dispose of stock from exercises of their stock options and to provide liquidity for stockholders wishing to sell their stock. All shares repurchased under the SRP have been retired and not held as treasury stock. The timing, price and amount of stock repurchases under the SRP may be determined by management and approved by the Company’s Executive Committee. At December 31, 2023, up to 479,784 shares could be repurchased under the SRP. For the year ended December 31, 2023, the Company repurchased 20,702 shares of its common stock for $1.8 million at an average price of $87.88 per share under the SRP. No shares were repurchased for the year ended December 31, 2022. For the year ended December 31, 2021, the Company repurchased 212,296 shares of its common stock for $11.7 million at an average price of $54.94 per share under the SRP.

Future dividend payments will be determined by the Company’s Board of Directors considering the earnings, financial condition and capital needs of the Company, BancFirst, Pegasus, Worthington, applicable governmental policies and regulations and such other factors as the Board of Directors deems appropriate. While no assurance can be given as to the Company’s ability to pay dividends, management believes that, based upon the anticipated performance of the Company, regular dividend payments will continue in 2024.

Related Party Transactions

See Note (18) of the Notes to Consolidated Financial Statements for disclosures regarding the Company’s related party transactions.

Liquidity Risk and Off-Balance Sheet Arrangements

Liquidity is the ability to meet financial obligations through the maturity or sale of existing assets or the acquisition of additional funds. Various financial obligations, including contractual obligations and commercial commitments, may require future cash payments by the Company. Certain obligations are recognized on the Consolidated Balance Sheets, while others are off-balance sheet under U.S. generally accepted accounting principles. The Company currently has 7.20% Junior Subordinated Debentures, Subordinated Notes, operating lease payments, time deposit payments and low income housing partnership commitments. The Company’s 7.20% Junior Subordinated Debentures mature on March 31, 2034. The Company's Subordinated Notes mature on June 30, 2036. The Company has consistently generated positive net income and the Company currently expects to have positive net income for 2024. Management does not currently know of any trends that would cause the Company to be unable to provide for current obligations in the next twelve months.

Refer to Notes 6, 8, 11, 19 and 20 to the consolidated financial statements for further information regarding these contractual obligations.

The Company is a party to financial instruments with off balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include loan commitments and standby letters of credit, which involve elements of credit and interest-rate risk to varying degrees. The Company’s exposure to credit loss in the event of nonperformance by the other party to the instrument is represented by the instrument’s contractual amount. To control this credit risk, the Company uses the same underwriting standards as it uses for loans recorded on the consolidated balance sheet. The Company had $2.8 billion and $2.6 billion in loan commitments at December 31, 2023 and 2022, respectively. The Company had $84.9 million and $72.2 million in stand-by letters of credit at December 31, 2023 and 2022, respectively. Loan commitments are agreements to lend to a customer, as long as there is no violation of any condition established in the contract. Stand-by letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. These instruments generally have fixed expiration dates or other termination clauses. Since many of the instruments are expected to expire without being drawn upon, the total amounts do not necessarily represent commitments that will be funded in the future.

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Item 7A. Quantitative and Qualitative Disclosures about Market Risk.

Market risk refers to the risk of loss arising from adverse changes in interest rates, foreign currency exchange rates, commodity prices and other relevant market rates and prices, such as equity prices. The risk of loss can be assessed from the perspective of adverse changes in fair values, cash flows and future earnings. Due to the nature of its operations, the Company is primarily exposed to interest rate risk arising principally from its lending, investing, deposit and borrowing activities and, to a lesser extent, liquidity risk.

Interest rate risk on the Company’s consolidated balance sheet consists of repricing, option and basis risks. Repricing risk results from the differences in the maturity or repricing of asset and liability portfolios. Option risk arises from “embedded options” present in many financial instruments such as loan prepayment options, deposit early withdrawal options and interest rate options. These options allow customers opportunities to benefit when market interest rates change, which typically results in higher costs or lower revenue for the Company. Basis risk refers to the potential for changes in the underlying relationship between market rates and indices, which subsequently result in a narrowing of the profit spread on an earning asset or liability. Basis risk is also present in administered rate liabilities, such as savings accounts, negotiable order of withdrawal accounts and money market accounts where historical pricing relationships to market rates may change due to the level or directional change in market interest rates.

The Company seeks to reduce volatility in its net interest margin and net interest income through periods of changing interest rates. Accordingly, the Company’s interest rate sensitivity and liquidity are monitored on an ongoing basis by its Asset and Liability Committee (“ALCO”). The ALCO establishes risk measures, limits and policy guidelines for managing the amount of interest rate risk and its effect on net interest income and capital. A variety of tools are used to evaluate the magnitude of interest rate risk, the distribution of risk, the level of risk over time and the exposure to changes in certain interest rate relationships. The ALCO also utilizes an earnings simulation model as a quantitative tool in measuring the amount of interest rate risk associated with changing market rates. The model quantifies the effects of various interest rate scenarios on projected net interest income over the next 12 months. These simulations incorporate assumptions regarding changes in interest rates and the maturity and repricing of earning assets and interest-bearing liabilities. The ALCO uses gap analysis to monitor interest rate sensitivity based on the maturity and repricing frequencies of its earning assets and interest-bearing liabilities. This analysis indicates that the Company’s position is liability-sensitive with a negative gap of $711 million for the zero to 12-month interval at December 31, 2023, which was 5.75% of total assets, compared to and asset-sensitive position and a positive gap of $327 million for the zero to 12-month interval at December 31, 2022, which was 2.64% of total assets.

The ALCO continuously monitors and manages the balance between interest rate-sensitive assets and liabilities. The objective is to manage the impact of fluctuating market rates on net interest income within acceptable levels. In order to meet this objective, management may lengthen or shorten the duration of assets or liabilities. As of December 31, 2023, the model simulations projected that a 100 and 200 basis point increase would result in negative variance in net interest income of 1.98% and 3.90%, respectively, relative to the base case over the next 12 months. Conversely, the model simulation projected that a decrease in interest rates of 100 basis points would result in a positive variance in net interest income of 1.90% relative to the base case over the next twelve months.

The following table presents the Company’s financial instruments that are sensitive to changes in interest rates, their expected maturities and their estimated fair values at December 31, 2023.

	Avg.			Expected Maturity / Principal Repayments at December 31,
	Rate			2024		2025		2026		2027		2028		Thereafter		Balance		Fair Value
				(Dollars in thousands)
Interest Sensitive Assets
Loans held for investment		6.42	%	$	3,300,811	$	1,043,448	$	985,540	$	675,982	$	525,171	$	1,125,693	$	7,656,645	$	7,453,568
Debt securities		2.35			348,668		336,836		307,718		327,543		252,272		47,573		1,620,610		1,555,095
Federal funds sold and    interest-bearing deposits		5.10			2,173,317		—		—		—		—		—		2,173,317		2,173,317
Interest Sensitive Liabilities
Savings and interest-bearing deposits		3.15			5,756,269		—		—		—		—		—		5,756,269		6,005,467
Time deposits		2.91			774,008		120,976		27,347		17,093		22,199		4		961,627		958,851
Short-term borrowings		4.84			3,351		—		—		—		—		—		3,351		3,351
Subordinated debt		4.79			—		—		—		—		—		86,101		86,101		79,271
Off Balance Sheet Items
Loan commitments					—		—		—		—		—		—		—		4,875
Letters of credit					—		—		—		—		—		—		—		637

The expected maturities and principal repayments are based upon the contractual terms of the instruments. Debt securities are stated at par value. Prepayments have been estimated for certain instruments with predictable prepayment rates. Savings and interest bearing demand deposits are assumed to mature all in the first year as they are not subject to withdrawal restrictions and any assumptions regarding decay rates would be very subjective. The actual maturities and principal repayments for the financial instruments could vary substantially from the contractual terms and assumptions used in the analysis.

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Item 8. Financial Statements and Supplementary Data.

Report of Independent Registered Public Accounting Firm

Shareholders, Board of Directors and Audit Committee

BancFirst Corporation

Oklahoma City, Oklahoma

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of BancFirst Corporation (the Company) as of December 31, 2023 and 2022 and the related consolidated statements of comprehensive income, stockholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2023 and the related notes (collectively referred to as the “financial statements”). In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the consolidated financial position of the Company as of December 31, 2023 and 2022 and the results of its operations and its cash flows for each of the years in the three-year period ended December 31, 2023, in conformity with accounting principles generally accepted in the United States of America.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2023 based on criteria established in Internal Control – Integrated Framework (2013), issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report, dated February 27, 2024, expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits.

We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures include examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to be communicated to the audit committee and that: 1) relate to accounts or disclosures that are material to the financial statements and 2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Allowance for Credit Losses - Loans

Description of the Matter

As more fully described in Notes 1 and 5 to the financial statements, the allowance for credit losses – loans (ACL) estimates lifetime expected credit losses for loans. The estimate of ACL considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. Loans that do not share risk characteristics are evaluated on an individual basis. Loans evaluated individually are not included in the collective evaluation.

The Company measures expected credit losses of loans on a pool basis when the loans share similar characteristics. Historical loss rates are analyzed and applied to their respective loan segments comprised of loans not subject to individual evaluation. The Company utilizes

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a methodology known as vintage loss analysis for substantially all its loan portfolio. Vintage loss analysis measures impairment based on the age of the accounts and the historical asset performance of assets with similar risk characteristics. Vintage loss analysis accounts for expected losses by calculating the cumulative loss rates of a given loan pool over the expected pool’s life. Historical loss rates are adjusted for significant factors that, in management’s judgment, reflect the impact of current conditions on loss recognition and certain known model limitations. Forecast factors are developed based on information obtained from external sources and consideration of other internal information. They are included in the ACL model for a reasonable and supportable forecast period, with loss factors reverting to historical loss rates. Management continually re-evaluates the other subjective and forecast factors in its ACL analysis.

We identified the valuation of the ACL as a critical audit matter. The primary reason for our determination that the ACL is a critical audit matter is that auditing the estimated ACL involved significant judgment and complex review. Auditing the ACL involved a high degree of subjectivity in evaluating management’s estimates, such as segmentation, weighted average life calculations, assessment of economic conditions and other environmental factors, and assessment of forecast factors.

How the Critical Audit Matter was Addressed in the Audit

We obtained an understanding of the Company’s process for establishing the ACL, which involves a high degree of subjectivity. We evaluated management’s process to assess economic conditions and other environmental factors, adequacy of specific allowances associated with individually evaluated loans, appropriateness of loan grades, and other data used to calculate and estimate the various components of the ACL.

Our primary audit procedures related to the ACL included the following, among others:

•Testing the design and operating effectiveness of controls, including those related to technology, over the ACL, including data completeness and accuracy; classifications of loans by loan pool; verification of historical net loss data and calculated net loss rates; the establishment of qualitative and economic forecast adjustments, loan grades, and risk classification of loans; and establishment of specific allocations associated with individually evaluated loans;

•Testing of completeness and accuracy of the data utilized in the ACL;

•Testing the model’s computational accuracy;

•Evaluating the relevance and reliability of data and assumptions used in the estimate;

•Evaluating the qualitative and economic forecast adjustments to the historical loss rates, including assessing the basis for the adjustments and the reasonableness of the significant assumptions;

•Testing the internal loan review function and evaluating the reasonableness of loan grades and specific allocations, if any;

•Assessing the reasonableness of specific allocations associated with individually evaluated loans.

•Evaluated the accuracy and completeness of Topic 326 disclosures in the financial statements.

/s/ FORVIS, LLP

We have served as the Company’s auditor since 2013.

Oklahoma City, Oklahoma

February 27, 2024

51

BANCFIRST CORPORATION

CONSOLIDATED BALANCE SHEETS

(Dollars in thousands)

	December 31,
	2023			2022
ASSETS
Cash and due from banks	$	225,462		$	259,049
Interest-bearing deposits with banks		2,172,001			2,909,861
Federal funds sold		1,316			2,850
Debt securities held for investment (fair value: $1,190 and $2,383, respectively)		1,190			2,383
Debt securities available for sale at fair value		1,553,905			1,538,221
Loans held for sale		3,489			6,232
Loans held for investment (net of unearned interest)		7,656,645			6,943,563
Allowance for credit losses		(96,800	)		(92,728	)
Loans, net of allowance for credit losses		7,559,845			6,850,835
Premises and equipment, net		278,594			278,088
Other real estate owned		33,718			36,756
Intangible assets, net		16,704			19,983
Goodwill		182,263			182,055
Accrued interest receivable and other assets		343,555			301,550
Total assets	$	12,372,042		$	12,387,863
LIABILITIES AND STOCKHOLDERS' EQUITY
Deposits:
Noninterest-bearing	$	3,982,226		$	4,944,730
Interest-bearing		6,717,896			6,029,498
Total deposits		10,700,122			10,974,228
Short-term borrowings		3,351			300
Accrued interest payable and other liabilities		148,577			76,455
Subordinated debt		86,101			86,044
Total liabilities		10,938,151			11,137,027
Commitments and contingent liabilities (Note 19)
Stockholders' equity:
Senior preferred stock, $1.00 par; 10,000,000 shares authorized; none issued		—			—
Cumulative preferred stock, $5.00 par; 900,000 shares authorized; none issued		—			—
Common stock, $1.00 par, 40,000,000 shares authorized; shares issued and outstanding: 32,933,018 and 32,875,560, respectively		32,933			32,876
Capital surplus		174,695			169,231
Retained earnings		1,276,305			1,120,292
Accumulated other comprehensive loss, net of income tax benefit of $15,473 and $22,107, respectively		(50,042	)		(71,563	)
Total stockholders' equity		1,433,891			1,250,836
Total liabilities and stockholders' equity	$	12,372,042		$	12,387,863

The accompanying Notes are an integral part of these consolidated financial statements.

52

BANCFIRST CORPORATION

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Dollars in thousands, except per share data)

	Year Ended December 31,
	2023			2022			2021
INTEREST INCOME
Loans, including fees	$	467,540		$	336,340		$	316,124
Debt securities:
Taxable		36,838			24,456			6,327
Tax-exempt		72			93			204
Federal funds sold		226			83			—
Interest-bearing deposits with banks		119,260			58,848			4,366
Total interest income		623,936			419,820			327,021
INTEREST EXPENSE
Deposits		195,046			41,965			8,232
Short-term borrowings		312			60			2
Subordinated debt		4,122			4,122			3,130
Total interest expense		199,480			46,147			11,364
Net interest income		424,456			373,673			315,657
Provision for (benefit from) credit losses		7,458			10,076			(8,690	)
Net interest income after provision for (benefit from) credit losses		416,998			363,597			324,347
NONINTEREST INCOME
Trust revenue		18,784			15,645			12,912
Service charges on deposits		77,367			86,757			83,425
Securities transactions (includes accumulated other comprehensive income reclassifications of $0, $1,536 and $0, respectively)		(1,828	)		(1,833	)		1,047
Income from sales of loans		2,607			4,548			7,282
Insurance commissions		30,615			26,883			23,745
Cash management		30,716			19,326			12,313
Gain on sale of other assets		1,603			448			2,762
Other		25,544			31,973			26,546
Total noninterest income		185,408			183,747			170,032
NONINTEREST EXPENSE
Salaries and employee benefits		199,986			184,976			166,723
Occupancy, net		21,027			19,326			18,483
Depreciation		18,657			18,600			16,925
Amortization of intangible assets		3,532			3,448			3,116
Data processing services		8,368			7,584			6,735
Net expense from other real estate owned		15,938			9,911			9,089
Marketing and business promotion		9,114			8,074			7,403
Deposit insurance		5,827			4,735			3,456
Other		50,009			53,258			54,051
Total noninterest expense		332,458			309,912			285,981
Income before taxes		269,948			237,432			208,398
Income tax expense		57,483			44,332			40,768
Net income	$	212,465		$	193,100		$	167,630
NET INCOME PER COMMON SHARE
Basic	$	6.45		$	5.89		$	5.12
Diluted	$	6.34		$	5.77		$	5.03
OTHER COMPREHENSIVE (LOSS)/GAIN
Unrealized gains/(losses) on available for sale debt securities, net of tax (expense)/benefit of $(6,634), $23,160 and $1,829, respectively	$	21,521		$	(74,880	)	$	(5,280	)
Reclassification adjustment for available for sale debt security gains included in net income, net of tax expense of $0, $(369) and $0, respectively		—			1,167			—
Other comprehensive gain/(loss), net of tax (expense)/benefit of $(6,634), $22,791 and $1,829, respectively		21,521			(73,713	)		(5,280	)
Comprehensive income	$	233,986		$	119,387		$	162,350

The accompanying Notes are an integral part of these consolidated financial statements.

53

BANCFIRST CORPORATION

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Dollars in thousands, except share data)

	Year Ended December 31,
	2023						2022					2021
	Shares			Amount			Shares		Amount			Shares			Amount
COMMON STOCK
Issued at beginning of period		32,875,560		$	32,876			32,603,118	$	32,603			32,719,852		$	32,720
Shares issued for stock options		78,160			78			272,442		273			95,562			95
Shares acquired and canceled		(20,702	)		(21	)		—		—			(212,296	)		(212	)
Issued at end of period		32,933,018		$	32,933			32,875,560	$	32,876			32,603,118		$	32,603
CAPITAL SURPLUS
Balance at beginning of period				$	169,231				$	159,914					$	156,574
Common stock issued for stock options					2,465					7,376						2,165
Net cash settlement of options					—					—						(958	)
Stock-based compensation arrangements					2,999					1,941						2,133
Balance at end of period				$	174,695				$	169,231					$	159,914
RETAINED EARNINGS
Balance at beginning of period				$	1,120,292				$	977,067					$	871,161
Net income					212,465					193,100						167,630
Dividends on common stock ($1.66, $1.52 and $1.40 per share, respectively)					(54,653	)				(49,875	)					(45,752	)
Net cash settlement of options					—					—						(4,521	)
Common stock acquired and canceled					(1,799	)				—						(11,451	)
Balance at end of period				$	1,276,305				$	1,120,292					$	977,067
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized gains/(losses) on available for sale debt securities:
Balance at beginning of period				$	(71,563	)			$	2,150					$	7,430
Net change					21,521					(73,713	)					(5,280	)
Balance at end of period				$	(50,042	)			$	(71,563	)				$	2,150
Total stockholders’ equity				$	1,433,891				$	1,250,836					$	1,171,734

The accompanying Notes are an integral part of these consolidated financial statements.

54

BANCFIRST CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOW

(Dollars in thousands)

	December 31,
	2023			2022			2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	212,465		$	193,100		$	167,630
Adjustments to reconcile to net cash provided by operating activities:
Provision for (benefit from) credit losses		7,458			10,076			(8,690	)
Depreciation and amortization		22,189			22,048			20,041
Net amortization of securities premiums and discounts		(1,269	)		2,619			4,409
Realized securities losses (gains)		1,828			1,833			(1,047	)
Gain on sales of loans		(2,607	)		(4,548	)		(7,282	)
Cash receipts from the sale of loans originated for sale		149,825			246,499			369,301
Cash disbursements for loans originated for sale		(144,476	)		(223,407	)		(354,674	)
Deferred income tax (benefit) provision		(2,787	)		322			7,044
Gain on sale of other real estate owned and other assets		(2,330	)		(4,682	)		(3,379	)
(Increase)/decrease in interest receivable		(9,876	)		(16,914	)		4,214
Increase/(decrease) in interest payable		7,719			3,192			(617	)
Stock-based compensation arrangements		2,999			1,941			2,133
Excess tax benefit from stock-based compensation arrangements		(899	)		(3,325	)		(1,932	)
Other, net		(7,194	)		(2,482	)		6,783
Net cash provided by operating activities		233,045			226,272			203,934
INVESTING ACTIVITIES
Net cash received from acquisitions, net of cash paid		8,045			121,099			12,599
Net cash paid from sale of assets and liabilities, net of cash received		—			—			(13,733	)
Net decrease in federal funds sold		1,534			563			14,200
Purchases of held for investment debt securities		—			—			(845	)
Purchases of available for sale debt securities		(454,019	)		(1,881,784	)		(462,304	)
Proceeds from maturities, calls and paydowns of held for investment debt securities		1,351			74			831
Proceeds from maturities, calls and paydowns of available for sale debt securities		467,601			550,018			506,737
Proceeds from sales of available for sale debt securities		—			222,474			—
Purchase of equity securities		(310	)		(4,309	)		(904	)
Proceeds from paydowns and sales of equity securities		850			1,620			1,459
Net change in loans		(719,287	)		(521,220	)		404,393
Net receipts (payments) on derivative asset contracts		21,192			7,294			(14,146	)
Purchases of premises, equipment and computer software		(22,504	)		(19,785	)		(27,251	)
Purchase of tax credits		(7,635	)		(9,706	)		(7,456	)
Other, net		33,477			14,494			9,305
Net cash (used in) provided by investing activities		(669,705	)		(1,519,168	)		422,885
FINANCING ACTIVITIES
Net change in deposits		(284,919	)		2,452,297			(191,737	)
Net change in short-term borrowings		3,051			300			(1,100	)
Issuance of common stock in connection with stock options, net		2,543			7,649			2,260
Common stock acquired		(1,820	)		—			(11,663	)
Proceeds from issuance of subordinated notes, net of debt issuance costs		—			—			59,150
Net cash settlement of options		—			—			(5,479	)
Cash dividends paid		(53,642	)		(48,462	)		(45,140	)
Net cash (used in) provided by financing activities		(334,787	)		2,411,784			(193,709	)
Net (decrease)/increase in cash, due from banks and interest-bearing deposits		(771,447	)		1,118,888			433,110
Cash, due from banks and interest-bearing deposits at the beginning of the period		3,168,910			2,050,022			1,616,912
Cash, due from banks and interest-bearing deposits at the end of the period	$	2,397,463		$	3,168,910		$	2,050,022
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	$	191,760		$	42,930		$	11,993
Cash paid during the period for income taxes	$	52,398		$	34,640		$	30,600
Noncash investing and financing activities:
Cash (received)/paid consideration for acquisitions	$	(7,833	)	$	77,685		$	21,000
Fair value of assets acquired in acquisitions	$	2,981		$	511,595		$	283,711
Liabilities assumed in acquisitions	$	10,814		$	433,911		$	257,915
Unpaid common stock dividends declared	$	14,161		$	13,150		$	11,737

The accompanying Notes are an integral part of these consolidated financial statements.

55

BANCFIRST CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(1) DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The accounting and reporting policies of BancFirst Corporation and its subsidiaries (the “Company”) conform to accounting principles generally accepted in the United States of America (U.S. GAAP) and general practice within the banking industry. A summary of the significant accounting policies follows.

Nature of Operations

BancFirst Corporation is an Oklahoma business corporation and a financial holding company under federal law. It conducts virtually all of its operating activities through its principal wholly-owned subsidiary, BancFirst (“BancFirst”), an Oklahoma state-chartered bank headquartered in Oklahoma City, Oklahoma. The Company also conducts operating activities through its wholly-owned subsidiaries, Pegasus Bank (“Pegasus”), a Texas state-chartered bank headquartered in Dallas, Texas and Worthington Bank ("Worthington"), a Texas state-chartered bank headquartered in Arlington, Texas. BancFirst, Pegasus and Worthington provide a wide range of retail and commercial banking services, including: commercial, real estate, agricultural and consumer lending; depository and funds transfer services; collections; safe deposit boxes; cash management services; and other services tailored for both individual and corporate customers. BancFirst also offers trust services and acts as executor, administrator, trustee, transfer agent and in various other fiduciary capacities. BancFirst provides item processing, research and other correspondent banking services to financial institutions and governmental units. The Company’s wholly-owned subsidiary, BancFirst Insurance Services, Inc., an independent insurance agency, offers a variety of commercial and personal insurance products. In addition, the Company’s wholly-owned subsidiary, Council Oak Partners, LLC, an Oklahoma limited liability company, engages in investing activities.

Basis of Presentation

The accompanying consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., Pegasus, Worthington and BancFirst and its subsidiaries. The principal operating subsidiaries of BancFirst are BFTower, LLC, BFC-PNC LLC, BF Brazito, LLC, and BancFirst Agency, Inc. All significant intercompany accounts and transactions have been eliminated. Assets held in a fiduciary or agency capacity are not assets of the Company and, accordingly, are not included in the consolidated financial statements. Certain amounts from 2022 and 2021 have been reclassified to conform to the 2023 presentation. These reclassifications were not material to the Company’s consolidated financial statements.

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with U.S. GAAP inherently involves the use of estimates and assumptions that affect the amounts reported in the financial statements and the related disclosures. These estimates relate principally to the determination of the allowance for credit losses, income taxes, the fair value of financial instruments and the valuation of assets and liabilities acquired in a business combination, including identifiable intangible assets. Such estimates and assumptions may change over time and actual amounts realized may differ from those reported.

Securities

The Company invests in debt securities. Any sales of debt securities are for the purpose of executing the Company’s asset/liability management strategy, eliminating a perceived credit risk in a specific security or providing liquidity. Debt securities that are being held for indefinite periods of time, or that may be sold as part of the Company’s asset/liability management strategy, to provide liquidity or for other reasons, are classified as available for sale and are stated at estimated fair value. Unrealized gains or losses on debt securities available for sale are reported as a component of stockholders’ equity, net of income tax. Gains or losses from sales of debt securities are based upon the book values of the specific debt securities sold. Debt securities for which the Company has the intent and ability to hold to maturity are classified as held for investment and are stated at cost, adjusted for amortization of premiums and accretion of discounts computed under the interest method. The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. The Company first assesses whether it intends to sell or it is more-likely-than-not that it will be required to sell the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities amortized cost basis is written down to fair value as a current period expense. If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. The Company does not consider the unrealized position of its debt securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for

56

credit losses against its debt securities portfolio, as the credit risk is not material. The Company does not engage in securities trading activities.

The Company invests in equity securities without readily determinable fair values and utilizes Level 3 inputs. These securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income. Equity securities are reported in other assets on the consolidated balance sheet. The Company reviews its portfolio of equity securities for impairment at least quarterly.

Loans

The lending function is governed by written policies and procedures, as determined by senior management and approved by the Board of Directors. The policies and procedures set the standards for lending in each major loan category by collateral type and use of loan proceeds. The objectives of these policies and procedures are to identify profitable markets, determine appropriate risk tolerance levels for each type of loan, establish limits for loan officer approval, set concentration limits, establish loan-to-value thresholds, set repayment terms and loan structure guidelines and adhere to documentation requirements. Interest rate risk is controlled by the use of variable rate provisions, the vast majority of which have a rate floor, limits on fixing rates for longer periods and the use of prepayment penalties.

Loans originated within the Company are stated at the principal amount outstanding, net of unearned interest, loan fees and allowance for credit losses. Interest on all performing loans is recognized, on a simple interest basis, based upon the principal amount outstanding. See Note (5) for loan disclosures.

Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts. The Company has made the accounting policy election to exclude accrued interest receivable on loans from the estimate of credit losses because it writes off uncollectible accrued interest in a timely manner. Interest income is accrued on the unpaid principal balance using the simple-interest method on the daily balances of the principal amounts outstanding.

The Company writes off accrued interest once a loan enters non-accrual status. The Company debits interest income for the interest accrued. No interest will be accrued on loans, for which a default of principal or interest has existed for a period of at least 90 days unless the collateral margin or guarantor support are such that full collection of principal and interest are not in doubt and an orderly plan for collection is in process. The Company also suspends interest recognition on any other loan for which it is more likely than not that future contractual payments will not be collected.

Interest income on consumer and commercial loans is discontinued and placed on nonaccrual status at the time the loan is 90 days delinquent unless the loan is well secured and in process of collection. Consumer loans are charged off at 180 days past due and commercial loans are charged off to the extent principal or interest is deemed uncollectible. Past-due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful.

All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. The amount of interest accrued but not received for loans placed on nonaccrual and reversed against interest income was $429,000, $147,000 and $83,000 for the years ended December 31, 2023, 2022 and 2021, respectively. Interest received on such loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Under the cost-recovery method, interest income is not recognized until the loan balance is reduced to zero. Under the cash-basis method, interest income is recorded when the payment is received in cash. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.

Modifications of loans to existing borrowers generally consist of interest rate reductions, extension of payment terms, or a combination of these. Modifications may arise either voluntarily through negotiations with the borrower or involuntarily through court order. Payment deferrals up to six months are generally considered to be short-term modifications. Generally, principal and accrued but unpaid interest is not voluntarily forgiven. A change to the allowance for credit losses is generally not recorded upon modification because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the allowance methodology.

57

Residential real estate loans are made in accordance with underwriting policies and are fully documented. Credit worthiness is assessed based on significant credit characteristics including credit history and residential and employment stability. The Company does not engage in any hybrid loan programs. In addition, the Company does not have any exposure to loans with negative amortization, interest rate carryover or discounting of the initial rates (teaser rates).

An updated appraisal of the collateral is obtained when a loan is first identified as a problem loan. Appraisals are reviewed annually and are updated as needed or are updated more frequently if significant changes are believed to have occurred in the collateral or market conditions. Appraisals of other real estate owned are also reviewed and updated consistent with this policy.

When a loan deteriorates to the point that the account officer or the Loan Committee concludes it no longer represents a viable asset, it will be charged off. Similarly, any portion of a loan that is deemed to no longer be a viable asset will be charged off. A loan will not be charged off unless such action has been approved by the branch President.

Acquired Loans

Loans acquired through business combinations are required to be carried at fair value as of the date of the combination. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date. The methodology of allowance for credit loss recorded for these acquired loans depends on whether the acquired loans are purchase credit deteriorated or non-purchase credit deteriorated. An allowance for credit loss for non-purchase credit deteriorated loans is determined and recorded in a manner consistent with originated loans. That is, the allowance for credit loss is calculated based on the loan’s amortized cost basis (i.e., the acquisition date fair value in a business combination) and is established through a charge to provision expense at the acquisition date. An allowance for credit loss for purchase credit deteriorated loans is recorded as an adjustment to the loans, in addition to the fair value amount recorded, as of the acquisition date, and not through provision expense. The acquisition date fair value plus the allowance for credit loss equals the loans new amortized cost basis as of the acquisition date. The difference between the new amortized cost basis and the unpaid principal balance of the loan represents the non-credit purchase discount/premium recorded. The difference between the fair value of loans which do not have specific evidence of deterioration of credit quality since origination and their principal balance is recognized in interest income on a level-yield method over the life of the loans. For loans which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments (as determined by the present value of expected future cash flows), the difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” is recognized in interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “nonaccretable difference,” are not recognized as yield adjustments or as loss accruals or valuation allowances. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining life. Decreases in expected cash flows are recognized as impairments. Any probable loss due to subsequent credit deterioration of the loans since acquisition is provided for in the allowance for credit losses.

Purchased Credit Deteriorated (PCD) Loans

The Company has purchased loans, some of which have experienced more than insignificant credit deterioration since origination. An allowance for credit losses is determined using the same methodology as other loans held for investment. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The sum of the loan’s purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the allowance for credit losses are recorded through provision expense.

Loans Held for Sale

The Company originates mortgage loans to be sold. At the time of origination, the acquiring bank has already been determined and the terms of the loan, including the interest rate, have already been set by the acquiring bank allowing the Company to originate the loan at fair value. Mortgage loans are generally sold within 30 days of origination. Loans held for sale are carried at the lower of cost or fair value. Gains or losses recognized upon the sale of the loans are determined on a specific identification basis. The Company does not sell residential mortgage loans with recourse other than obligations under standard representations and warranties or for fraud. These obligations relate to loan performance for the life of the loan. The amount of loans repurchased since the inception of the program is not considered to be material, and therefore, no reserve has been required.

Allowance for Credit Losses

The allowance for credit losses is a valuation account that is deducted from the loans amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the uncollectibility of a

58

loan balance is confirmed. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. The allowance for credit losses is increased by provisions charged to operating expense and is reduced by net loan charge-offs.

The Company considers various factors to monitor the credit risk in the loan portfolio including volume and severity of loan delinquencies, nonaccrual loans, internal grading of loans, historical loan loss experience and economic conditions.

Management estimates the allowance balance using relevant available information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, delinquency level, or term as well as for changes in environmental conditions, such as the political, legal, and regulatory environment, technology and consumer preferences. Historical loss information is also adjusted for reasonable and supportable changes in national and local economic conditions, such as consumer loans 90 days past due and commercial bankruptcies. Economic conditions are forecast as "current conditions" over the forecast period. Forecast models were used to validate credit performance during the forecast period. Beyond the reasonable and supportable forecast, the economic expectation reverts to the historical average, which is determined by the weighted average life of each loan pool.

If a loan is individually evaluated a specific allowance is provided, if necessary, so that the loan is reported net, at the fair value of collateral. Interest payments on collateral dependent loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Loans, or portions thereof, are charged off when deemed uncollectible. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist.

Determining the Contractual Term

Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications unless the following applies: the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company.

Allowance for Credit Losses on Off-Balance Sheet Credit Exposures

The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The allowance for credit losses on off-balance sheet credit exposures is adjusted as a provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. Based on a low likelihood that funding will occur and the Company’s ability to manage the extension of credit to our borrowers, the allowance for credit losses on off-balance sheet credit exposure is not material.

Allowance for Credit Losses on Available-for-Sale Debt Securities

The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. The Company first assesses whether it intends to sell or it is more-likely-than-not that it will be required to sell the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities amortized cost basis is written down to fair value as a current period expense. If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. At December 31, 2023 and December 31, 2022 approximately 98% of the available for sale debt securities held by the Company were issued by the U.S. Treasury, or U.S. government-sponsored entities and agencies. The Company does not consider the unrealized loss position of these securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for credit losses against its debt securities portfolio, as the credit risk is not material.

Nonaccrual Policy

A loan is placed on nonaccrual status when, in the opinion of management, the future collectability of both interest and principal is not probable. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest income is recognized on certain of these loans on a cash basis if the full collection of the remaining principal balance is reasonably expected. Otherwise, interest income is not recognized until the principal balance is fully collected.

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The Company does not accrue interest on (1) any loan upon which a default of principal or interest has existed for a period of 90 days or over unless the collateral margin or guarantor support are such that full collection of principal and interest are not in doubt, and an orderly plan for collection is in process; and (2) any other loan for which it is expected full collection of principal and interest is not probable.

A nonaccrual loan may be restored to an accrual status when none of its principal and interest are past due and unpaid or otherwise becomes well secured and in the process of collection and when prospects for collection of future contractual payments are no longer in doubt. With the exception of a formal debt forgiveness agreement, no loan which has had principal charged-off shall be restored to accrual status unless the charged-off principal has been recovered.

Premises and Equipment

Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is charged to operating expense and is computed using the straight-line method over the estimated useful lives of the assets. Maintenance and repairs are charged to expense as incurred while improvements are capitalized. Premises and equipment is tested for impairment if events or changes in circumstances occur that indicate that the carrying amount of any premises and equipment may not be recoverable. Impairment losses are measured by comparing the fair values of the premises and equipment with their recorded amounts. Premises that are identified to be sold are transferred to other real estate owned at the lower of their carrying amounts or their fair values less estimated costs to sell. Any losses on premises identified to be sold are charged to operating expense. When premises and equipment are transferred to other real estate owned, sold, or otherwise retired, the cost and applicable accumulated depreciation are removed from the respective accounts and any resulting gains or losses are reported in the consolidated statements of comprehensive income. Construction in progress includes all the costs of construction associated with the building of fixed long-term assets and is included in premises and equipment, net as an asset. When construction is completed, the asset is reclassified as a building or a leasehold improvement and depreciated over its applicable useful life.

Leases

Certain operating leases are included as right of use lease assets in accrued interest receivable and other assets on the consolidated balance sheet and a related lease liability is included in accrued interest payable and other liabilities on the consolidated balance sheet. Right of use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The lease liability is measured as the present value of the unpaid lease payments, and the right of use assets value is derived from the calculation of the lease liability. To calculate the discount rate for each lease, the Company uses the rate implicit in the lease if available, otherwise an appropriate Federal Home Loan Bank ("FHLB") advance borrowing rate is used that correlates with the term of the lease.

Other Real Estate Owned

Other real estate owned ("OREO") consists of properties acquired through foreclosure proceedings or acceptance of a deed in lieu of foreclosure, and premises held for sale. These properties are carried at the lower of the book values of the related loans or fair values based upon appraisals, less estimated costs to sell. Losses arising at the time of reclassification of such properties from loans to OREO are charged directly to the allowance for credit losses. Any losses on premises identified to be sold are charged to operating expense at the time of transfer from premises to OREO. Losses from declines in value of the properties subsequent to classification as OREO are charged to operating expense. Revenues and expenses for OREO property are included in the consolidated statements of comprehensive income for the period in which they occur. Gross rental income for OREO is included in other non-interest income. The expenses of operating or holding OREO property are included in noninterest expense.

Intangible Assets and Goodwill

Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives of seven to ten years and customer relationship intangibles are amortized on a straight-line basis over the estimated useful life of three to eighteen years. Goodwill is not amortized but is evaluated at a reporting unit level at least annually for impairment, or more frequently if other indicators of impairment are present. At least annually in the fourth quarter, intangible assets are evaluated for possible impairment. Impairment losses are measured by comparing the fair values of the intangible assets with their recorded amounts. Any impairment losses are reported in the consolidated statements of comprehensive income.

Advertising Costs

Advertising costs are expensed as incurred. Advertising costs for the year ended December 31, 2023 were $3.2 million. Advertising costs for the years ended December 31, 2022 and 2021 were both $3.0 million.

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Stock-based Compensation

The Company recognizes stock-based compensation as compensation expense in the consolidated statements of comprehensive income based on the fair value of the Company’s stock options and restricted stock units ("RSU's") on the measurement date, which, for the Company, is the date of the grant. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model and is based on certain assumptions including risk-free rate of return, dividend yield, stock price volatility and the expected term. The fair value of each RSU granted is equal to the market price of the Company’s stock at the date of grant. The fair value of each option and RSU is expensed over its vesting period.

Income Taxes

The Company files a consolidated income tax return with its subsidiaries. Federal and state income tax expense or benefit has been allocated to subsidiaries on a separate return basis. Deferred taxes are recognized under the balance sheet method based upon the future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities, using the tax rates expected to apply to taxable income in the periods when the related temporary differences are expected to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years. Although realization is not assured, management believes it is more likely than not that all of the deferred tax assets will be realized.

Earnings Per Common Share

Basic earnings per common share is computed by dividing net income, less any preferred dividends requirement, by the weighted average of common shares outstanding. Diluted earnings per common share reflects the potential dilution that could occur if options, RSU's, convertible securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the Company.

Revenue Recognition

In addition to lending and related activities, the Company offers various services to customers that generate revenue. Contract performance typically occurs in one year or less. Incremental costs of obtaining a contract are expensed when incurred when the amortization period is one year or less.

Sales of real estate

The sale of real estate property is generally recognized, along with any associated gain or loss, when control of the property transfers to the buyer.

Service and transaction fees on depository accounts

Customers often pay certain fees to the bank to access the cash on deposit including certain non-transactional fees such as account maintenance or dormancy fees, and certain transaction-based fees such as non-sufficient funds fees, overdraft, ATM, wire transfer, or foreign exchange fees. Revenue is recognized when the transactions occur or as services are performed over primarily monthly or quarterly periods. Payment is typically received in the period the transactions occur, or in some cases, within 90 days of the service period.

Interchange Fees

Interchange fees, or “swipe” fees, are charges that merchants pay to the processors who, in turn, share that revenue with us and other card-issuing banks for processing electronic payment transactions. Interchange fees represent the portion of the debit card transaction amount that the card issuer retains to compensate it for processing transactions and providing rewards. Interchange fees are settled and recognized on a daily or monthly basis.

Insurance Commissions and Fees

Insurance commissions are received on the sale of insurance products, and revenue is recognized upon the placement date of the insurance policies or when such commissions are received. Payment is normally received within the policy period. In addition to placement, the Company also provides insurance policy related risk management services. Revenue is recognized as these services are provided. Performance-based commissions are recognized when received or earlier when, upon consideration of past results and current condition, the revenue is deemed not probable of reversal.

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For accounts billed by BancFirst Insurance Services, Inc., commission revenue is recognized at the later of the billing date or the effective date of the related insurance policies. Commission revenue, for accounts that are directly billed by the insurance company to the insured, is recognized when determinable by BancFirst Insurance Services, Inc., which is generally when such commissions are received.

BancFirst Insurance Services, Inc. also receives contingent commissions from insurance companies as additional incentive for achieving specified premium volume goals and/or loss experience parameters relating to the insurance they place. Contingent commissions from insurance companies are recognized when determinable, which is generally when such commissions are received.

Trust

BancFirst offers trust services and acts as executor, administrator, trustee, transfer agent and in various other fiduciary capacities. There are four basic types of fees that are included in the trust department income. Administrative fees are assessed for managing trust accounts. Shareholder fees are received in connection with holding specific fund share classes. In return for these services, the mutual fund (or its distributor or investment advisor) pay a fee to BancFirst. Oil and gas fees are assessed for management of oil and gas related activities. There are also other types of fees charged on a one time basis such as those related to opening and closing trust accounts. BancFirst records trust fees on a monthly, quarterly or annual basis based on the size of the asset being managed. Fees may be fixed or, where applicable, based on a percentage of transaction size of managed assets. These fees are recorded as revenue at the time the fee is billed, according to the agreement with the customer.

Comprehensive Income

Comprehensive income includes all changes in stockholders’ equity during a period, except those resulting from transactions with stockholders. Besides net income, other components of the Company’s comprehensive income includes the after tax effect of changes in the net unrealized gain/loss on debt securities available for sale. The Company’s policy is to release material stranded tax effects included in accumulated other comprehensive income on a specific identification basis.

Consolidated Statements of Cash Flows

For purposes of the consolidated statements of cash flows, the Company considers cash and due from banks and interest-bearing deposits with banks as cash equivalents.

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Recent Accounting Pronouncements

Standards Not Yet Adopted:

In November 2023, the Financial Accounting Standards Board (“FASB“) issued Accounting Standards Update (“ASU”) 2023-07, “Segment Reporting - Improvements to Reportable Segment Disclosures” requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal year beginning after December 15, 2024 on a retrospective basis. The amendments are to be applied retrospectively to all periods presented and segment expense categories should be based on the categories identified at adoption. The Company does not expect adoption of the standard to have a material impact on its consolidated financial statements.

In December 2023, FASB issued ASU No. 2023-09, “Income Taxes - Improvements to Income Tax Disclosures” requiring enhancements and further transparency to certain income tax disclosures, most notably the tax rate reconciliation and income taxes paid. This ASU is effective for fiscal years beginning after December 15, 2024 on a prospective basis and retrospective application is permitted. The Company does not expect adoption of the standard to have a material impact on its consolidated financial statements.

Standards Adopted During the Current Period:

In March 2022, FASB issued ASU No. 2022-02, “Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” ASU 2022-02 eliminated the Troubled Debt Restructurings (“TDR”) recognition and measurement guidance and, instead, required that the Company evaluate, based on the accounting for loan modifications, whether the modification represents a new loan or a continuation of an existing loan when a borrower is experiencing financial difficulty. In addition, the update required that the Company disclose current-period charge-offs by year of origination for financing receivables. The current-period charge-off amendment was applied prospectively. The amendments were effective for annual periods beginning after December 15, 2022, including interim periods within those annual periods. The Company adopted ASU 2022-02 on a prospective basis on January 1, 2023. ASU No. 2022-02 did not have a significant impact on the Company’s consolidated financial statements.

Prior to the adoption of ASU 2022-02, a TDR occurred when a loan to a borrower experiencing financial difficulty was restructured with a concession provided that a creditor would not otherwise consider. For the Company's accounting policy related to TDRs granted prior to the adoption of ASU 2022-02, refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

In March 2023, FASB issued ASU No. 2023-02, “Investments - Equity Method and Joint Ventures (Topic 323)”. ASU 2023-02 permits the election of accounting for tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method, if certain conditions are met. Using the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the income tax credits and other income tax benefits received and recognizes the net amortization and income tax credits and other income tax benefits in the income statement as a component of income tax expense (benefit). The amendments are effective for annual periods beginning after December 15, 2023, including interim periods within those annual periods. Early adoption is permitted for all entities in any interim period. The Company adopted the amendment as of January 1, 2023 using the modified retrospective transition. The Company has investments in New Markets Tax Credits ("NMTC"), Low-Income Housing Tax Credits ("LIHTC") and other tax credits that were affected by ASU 2023-02. As a result of the adoption of ASU No. 2023-02, the Company recorded $25.1 million in other assets and other liabilities on the consolidated balance sheet during 2023 for unfunded LIHTC commitments and amortized $6.0 million of NMTC and other tax credit investments to income tax expense during the period that would have previously been recorded to other expense. ASU No. 2023-02 did not have a significant impact on the Company’s consolidated financial statements as disclosed above.

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(2) RECENT DEVELOPMENTS, INCLUDING MERGERS AND ACQUISITIONS

BancFirst Corporation is regulated by the Federal Reserve System as a financial holding company. On August 11, 2023, BancFirst became a Federal Reserve System member bank, which changed its primary regulator from the Federal Deposit Insurance Corporation (“FDIC”) to the Federal Reserve System. Worthington became a Federal Reserve System member bank on September 1, 2023, and Pegasus became a Federal Reserve System member bank on October 12, 2023, which changed their primary regulator from the FDIC to the Federal Reserve System.

On July 20, 2023, BancFirst purchased approximately $2.5 million in total assets, which included $2.1 million in loans, and assumed $10.8 million in deposits and other obligations, from RCB Bank's Stroud, Oklahoma branch. RCB Bank paid BancFirst $7.8 million as a result of this transaction. In addition, the Company recorded a core deposit intangible of $252,000 and goodwill of $209,000. The Company did not incur a material amount of purchase-related expenses. The effect of this purchase was included in the consolidated financial statement of the Company from the date of purchase forward. The purchase did not have a material effect on the Company's consolidated financial statements. The purchase of this branch strengthens BancFirst's presence in the Stroud, Oklahoma community.

On February 8, 2022, the Company acquired Worthington for an aggregate cash purchase price of $77.7 million. At the time of the acquisition, Worthington was chartered and regulated by the Texas State Banking Department with one banking location in Arlington, Texas, one in Colleyville, Texas and two in Fort Worth, Texas. Worthington had approximately $478 million in total assets, $257 million in loans and $430 million in deposits. Worthington will continue to operate under a separate charter and remain a separate subsidiary of the Company governed by its existing board of directors. The Company intends to provide an appropriate amount of capital or other support to increase Worthington’s ability to approve larger loans and allow Worthington to continue to grow earning assets. As a result of the acquisition, the Company recorded a core deposit intangible of $5.9 million and goodwill of $32.1 million. The Company did not incur a material amount of acquisition-related expenses. The effect of this acquisition was included in the consolidated financial statements of the Company from the date of acquisition forward. Pro forma information has not been presented because the acquisition did not have a material effect on the Company’s consolidated financial statements. The acquisition of Worthington complemented the Company's growing presence in the Dallas-Fort Worth market.

(3) CASH, DUE FROM BANKS, INTEREST-BEARING DEPOSITS AND FEDERAL FUNDS SOLD

The Company maintains accounts with the Federal Reserve Bank and various other financial institutions primarily for the purpose of holding excess liquidity and clearing cash items. It may also sell federal funds to certain of these institutions on an overnight basis. At December 31, 2023 and 2022, the Company had no significant concentrations of credit risk with other financial institutions. The Company maintained vault cash and funds on deposit with the Federal Reserve Bank, which is included in the following table:

	December 31,
	2023		2022
	(Dollars in thousands)
Vault cash and funds on deposit with the Federal Reserve Bank	$	2,255,198	$	2,942,665

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(4) SECURITIES

The following table summarizes the amortized cost and estimated fair values of debt securities held for investment:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(Dollars in thousands)
December 31, 2023
Mortgage backed securities (1)	$	5	$	—	$	—	$	5
States and political subdivisions		685		—		—		685
Other securities		500		—		—		500
Total	$	1,190	$	—	$	—	$	1,190
December 31, 2022
Mortgage backed securities (1)	$	13	$	—	$	—	$	13
States and political subdivisions		1,870		—		—		1,870
Other securities		500		—		—		500
Total	$	2,383	$	—	$	—	$	2,383

The following table summarizes the amortized cost and estimated fair values of debt securities available for sale:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(Dollars in thousands)
December 31, 2023
U.S. treasuries	$	1,560,265	$	415	$	(62,635	)	$	1,498,045
U.S. federal agencies		11,631		142		(3	)		11,770
Mortgage backed securities (1)		16,459		13		(1,677	)		14,795
States and political subdivisions		10,108		16		(114	)		10,010
Asset backed securities		12,794		—		(282	)		12,512
Other securities		8,163		—		(1,390	)		6,773
Total	$	1,619,420	$	586	$	(66,101	)	$	1,553,905
December 31, 2022
U.S. treasuries	$	1,568,563	$	—	$	(90,699	)	$	1,477,864
U.S. federal agencies		15,025		198		(1	)		15,222
Mortgage backed securities (1)		18,449		21		(1,884	)		16,586
States and political subdivisions		8,320		35		(221	)		8,134
Asset backed securities		13,371		—		(361	)		13,010
Other securities		8,163		—		(758	)		7,405
Total	$	1,631,891	$	254	$	(93,924	)	$	1,538,221

(1)Primarily consists of FHLMC, FNMA, GNMA and mortgage backed securities through U.S. agencies.

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The maturities of debt securities held for investment and available for sale are summarized in the following table using contractual maturities. Actual maturities may differ from contractual maturities due to obligations that are called or prepaid. For purposes of the maturity table, mortgage-backed securities, which are not due at a single maturity date, have been presented at their contractual maturity.

	December 31,
	2023				2022
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
	(Dollars in thousands)
Held for Investment
Contractual maturity of debt securities:
Within one year	$	350	$	350	$	1,186	$	1,186
After one year but within five years		840		840		1,195		1,195
After five years but within ten years		—		—		2		2
After ten years		—		—		—		—
Total	$	1,190	$	1,190	$	2,383	$	2,383
Available for Sale
Contractual maturity of debt securities:
Within one year	$	348,318	$	341,645	$	101,607	$	100,655
After one year but within five years		1,223,529		1,167,973		1,316,874		1,233,725
After five years but within ten years		10,331		8,851		170,513		163,101
After ten years		37,242		35,436		42,897		40,740
Total debt securities	$	1,619,420	$	1,553,905	$	1,631,891	$	1,538,221

The following is a detail of proceeds from sales and the realized losses on available for sale debt securities:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Proceeds	$	—	$	222,474	$	—
Gross losses realized		—		3,990		—

In March 2022, the Company sold $226 million of debt securities with an average yield of 0.16%, the proceeds of which were subsequently reinvested in $220 million of debt securities with an average yield of 1.86%. The Company used specific identification to reclassify the unrealized loss in other comprehensive income to a realized loss, as shown in the consolidated statements of comprehensive income. There were no sales of securities and therefore no proceeds from sales or realized securities losses on available for sale debt securities for the years ended December 31, 2023 and 2021, respectively.

Realized gains/losses on debt and equity securities are reported as securities transactions within the noninterest income section of the consolidated statements of comprehensive income.

The following table is a summary of the Company’s book value of debt securities that were pledged as collateral for public funds on deposit, repurchase agreements and for other purposes as required or permitted by law:

	December 31,
	2023		2022
	(Dollars in thousands)
Book value of pledged securities	$	591,324	$	573,952

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The following table summarizes debt securities with unrealized losses, segregated by the duration of the unrealized loss, at December 31, 2023 and 2022 respectively:

			Less than 12 Months				More than 12 Months				Total
	Number of investments		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
			(Dollars in thousands)
December 31, 2023
Available for Sale
U.S. treasuries		68	$	4,838	$	90	$	1,401,669	$	62,545	$	1,406,507	$	62,635
U.S. federal agencies		3		1,100		3		—		—		1,100		3
Mortgage backed    securities		74		80		—		13,261		1,677		13,341		1,677
States and political    subdivisions		6		306		4		1,847		110		2,153		114
Asset backed securities		1		—		—		12,512		282		12,512		282
Other securities		3		—		—		6,773		1,390		6,773		1,390
Total		155	$	6,324	$	97	$	1,436,062	$	66,004	$	1,442,386	$	66,101
December 31, 2022
Available for Sale
U.S. treasuries		74	$	787,925	$	27,078	$	689,939	$	63,621	$	1,477,864	$	90,699
U.S. federal agencies		1		—		—		349		1		349		1
Mortgage backed    securities		92		10,001		1,239		5,055		645		15,056		1,884
States and political    subdivisions		8		2,308		184		464		37		2,772		221
Asset backed securities		1		13,010		361		—		—		13,010		361
Other securities		3		4,871		291		2,534		467		7,405		758
Total		179	$	818,115	$	29,153	$	698,341	$	64,771	$	1,516,456	$	93,924

The Company has the ability and intent to hold the debt securities classified as held for investment until they mature, at which time the Company will receive full value for the debt securities. Furthermore, as of December 31, 2023 and 2022, the Company also had the ability and intent to hold the debt securities classified as available for sale for a period of time sufficient for a recovery of cost. The unrealized losses are due to increases in market interest rates over the yields available at the time the underlying debt securities were purchased. The fair value of those debt securities having unrealized losses is expected to recover as the securities approach their maturity date or repricing date, or if market yields for such investments decline. The Company has no intent or requirement to sell before the recovery of the unrealized loss; therefore, no impairment loss was realized in the Company’s consolidated statements of comprehensive income.

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(5) LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES ON LOANS

Loans held for investment are summarized by portfolio segment as follows:

	December 31,
	2023		2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	960,944	$	908,494
Commercial real estate non-owner occupied		1,486,420		1,383,150
Construction and development < 60 months		642,643		475,236
Construction residential real estate < 60 months		283,486		303,305
Residential real estate first lien		1,258,744		1,117,899
Residential real estate all other		244,696		196,198
Agriculture		427,139		408,037
Commercial non-real estate		1,289,452		1,241,454
Consumer non-real estate		476,467		446,756
Oil and gas		586,654		463,034
Total (1)	$	7,656,645	$	6,943,563
(1) Excludes accrued interest receivable of $39.4 million at December 31, 2023 and $30.6 million at December 31, 2022, that is recorded in accrued interest
receivable and other assets.

Certain loan segments for 2022 were reclassified to conform to the 2023 presentation. Each loan segment consists of loan categories possessing similar risk characteristics. The Company’s re-alignment of the segments primarily consisted of reclassifying farmland and agriculture related loans that were previously included in consumer-related and commercial-related loans to the agriculture category. Management believes this accurately represents the risk profile of each loan segment. These reclassifications did not have a significant impact on the allowance for credit losses.

The Company's loans are currently 84% held by BancFirst and 16% held by Pegasus and Worthington. In addition, approximately 69% of the Company's loans are secured by real estate. Credit risk on loans is managed through limits on amounts loaned to individual and related borrowers, underwriting standards and loan monitoring procedures. The amounts and types of collateral obtained, if any, to secure loans are based upon the Company’s underwriting standards and management’s credit evaluation. Collateral varies, but may include real estate, equipment, accounts receivable, inventory, livestock and securities. The Company’s interest in collateral is secured through filing mortgages and liens, and in some cases, by possession of the collateral.

The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist. The Company has identified the following portfolio segments, which includes the applicable weighted average remaining life, and measures the allowance for credit losses using the vintage loss analysis adjusted for qualitative factors:

Portfolio Segments	Life (in years)
Real estate:
Commercial real estate owner occupied		9
Commercial real estate non-owner occupied		6
Construction and development < 60 months		3
Construction residential real estate < 60 months		2
Residential real estate first lien		15
Residential real estate all other		8
Agriculture		9
Commercial non-real estate		4
Consumer non-real estate		4
Oil and gas		2

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These portfolio segments are separately identified because they exhibit distinctive risk characteristics, such as financial asset types, loan purpose, collateral, and industry of the borrower. A summary of our primary portfolio segments is as follows:

Commercial real estate owner occupied. Commercial real estate owner occupied are nonresidential property loans for which the primary source of repayment is the cash flow from the ongoing operations and activities conducted by the entity, or an affiliate of the entity, who owns the property. This category includes, among other loans, loans secured by office buildings, garden office buildings, manufacturing facilities, warehouse and flex warehouse facilities, hospitals, and car washes unless the property is owned by an investor who leases the property to the operator who, in turn, is not related to or affiliated with the investor.

Commercial real estate non-owner occupied. Commercial real estate non-owner occupied are nonresidential property loans where the primary source of repayment is derived from rental income associated with the property or the proceeds of the sale, refinancing, or permanent financing of the property. This category includes, among other loans, loans secured by shopping centers, office buildings, hotels/motels, nursing homes, assisted-living facilities, mini-storage warehouse facilities, and similar properties.

Construction and development < 60 months. Residential development loans include loans to develop raw land into a residential development. Advances on the loans typically include land costs, hard costs (grading, utilities, roads, etc.), soft costs (engineering fees, development fees, entitlement fees, etc.) and carrying costs until the development is completed. Upon completion of the development, the loan is typically repaid through the sale of lots to homebuilders.

Construction residential real estate < 60 months. Residential construction includes loans to builders for speculative or custom homes, as well as direct loans to individuals for construction of their personal residence. Custom construction and self-construction loans typically will have commitments in place for long-term financing at the completion of construction. Speculative construction loans generally will have periodic curtailment plans beginning after completion of construction and a reasonable time for sales to have occurred.

Residential real estate first lien. Residential real estate first lien loans includes all closed-end loans secured by first liens on 1-to-4 family residential properties. This category includes property containing 1-to-4 dwelling units (including vacation homes) or more than four dwelling units if each is separated from other units by dividing walls that extend from ground to roof. This category also includes individual condominium dwelling units and loans secured by an interest in individual cooperative housing units, even if in a building with five or more dwelling units.

Residential real estate all other. Residential real estate all other loans includes loans secured by junior (i.e., other than first) liens on 1-to-4 family residential properties. This category includes loans secured by junior liens even if the Company also holds a loan secured by a first lien on the same 1-to-4 family residential property.

Agricultural. This category includes loans secured by all land known to be used or usable for agricultural purposes, such as crop and livestock production.

Commercial non-real estate. Commercial non-real estate represent loans for working capital, facilities acquisition or expansion, purchase of equipment and other needs of commercial customers primarily located within Oklahoma. Loans in this category include commercial and industrial and state and political subdivisions.

Consumer non-real estate. Consumer loans are loans to individuals for household, family and other personal expenditures. Commonly, such loans are made to finance purchases of consumer goods, such as automobiles, boats, household goods, vacations and education.

Oil and gas. Oil and gas loans represent loans for producing oil and gas properties and any other mineral interests that may be pumped, mined, quarried or otherwise extracted from the earth. These loans also include upstream and midstream energy loans, and loans to companies that provide ancillary services to the energy industry, such as transportation, wellsite preparation contractors and equipment manufacturers.

69

Loan Modifications, Other Real Estate Owned and Repossessed Assets and Held for Sale Assets

The following is a summary of other real estate owned and repossessed assets:

	December 31,
	2023		2022
	(Dollars in thousands)
Other real estate owned and repossessed assets	$	34,200	$	36,936

As of both December 31, 2023 and December 31, 2022, other real estate owned included a larger commercial real estate property recorded at $29.4 million. Rental income for this property is included in other noninterest income on the consolidated statements of comprehensive income. Operating expense for this property is included in net expense from other real estate owned in other noninterest expense on the consolidated statements of comprehensive income.

This property had the following rental income and operating expenses for the periods presented.

	For the Twelve Months Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Rental income	$	11,224	$	10,340	$	9,975
Operating expense		10,868		9,863		8,727

During 2023, the Company sold property held in other real estate owned for a total gain of $728,000 compared to gains of $4.2 million in 2022 and $618,000 in 2021.

During 2023, the Company wrote down property held in other real estate owned for a total of $5.2 million compared to write downs of $3.7 million in 2022 and $538,000 in 2021.

The Company charges interest on principal balances outstanding on modified loans during deferral periods. The current and future financial effects of the recorded balance of loans considered to be modified during the period were not considered to be material. The recorded balance of modified loans was approximately $5.3 million during the year ended December 31, 2023.

Nonaccrual loans

The Company did not recognize any interest income on nonaccrual loans for any of the years ended December 31, 2023, 2022 or 2021. In addition, there were no nonaccrual loans for which there is no related allowance for credit losses at both December 31, 2023 and December 31, 2022. Had nonaccrual loans performed in accordance with their original contractual terms, the Company would have recognized additional interest income of $1.6 million in 2023, $1.3 million in 2022 and $2.2 million in 2021.

Nonaccrual loans guaranteed by government agencies totaled $6.7 million at December 31, 2023 and $4.7 million at December 31, 2022.

70

The following table is a summary of amounts included in nonaccrual loans, segregated by portfolio segment.

	December 31, 2023		December 31, 2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	1,686	$	1,795
Commercial real estate non-owner occupied		874		667
Construction and development < 60 months		800		93
Construction residential real estate < 60 months		638		430
Residential real estate first lien		3,336		1,947
Residential real estate all other		899		55
Agriculture		3,662		2,734
Commercial non-real estate		10,101		7,066
Consumer non-real estate		449		192
Oil and gas		2,128		320
Total	$	24,573	$	15,299

71

Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. The following table presents an age analysis of the Company's loans held for investment:

	Age Analysis of Past Due Loans
	30-59 Days Past Due		60-89 Days Past Due		90 Days and Greater		Total Past Due Loans		Current Loans		Total Loans		Accruing Loans 90 Days or More Past Due
	(Dollars in thousands)
December 31, 2023
Real estate:
Commercial real estate owner    occupied	$	1,386	$	26	$	5,598	$	7,010	$	953,934	$	960,944	$	4,377
Commercial real estate non-owner    occupied		2,224		7,371		1,786		11,381		1,475,039		1,486,420		913
Construction and development <60    months		198		158		800		1,156		641,487		642,643		—
Construction residential real estate    < 60 months		1,542		206		405		2,153		281,333		283,486		332
Residential real estate first lien		3,879		1,204		1,849		6,932		1,251,812		1,258,744		731
Residential real estate all other		757		190		613		1,560		243,136		244,696		549
Agriculture		1,694		724		1,227		3,645		423,494		427,139		579
Commercial non-real estate		1,501		436		10,028		11,965		1,277,487		1,289,452		1,714
Consumer non-real estate		3,248		1,090		594		4,932		471,535		476,467		347
Oil and gas		—		—		92		92		586,562		586,654		—
Total	$	16,429	$	11,405	$	22,992	$	50,826	$	7,605,819	$	7,656,645	$	9,542
	30-59 Days Past Due		60-89 Days Past Due		90 Days and Greater		Total Past Due Loans		Current Loans		Total Loans		Accruing Loans 90 Days or More Past Due
	(Dollars in thousands)
December 31, 2022
Real estate:
Commercial real estate owner    occupied	$	1,314	$	1,524	$	4,580	$	7,418	$	901,076	$	908,494	$	4,580
Commercial real estate non-owner    occupied		6,237		—		42		6,279		1,376,871		1,383,150		43
Construction and development <60    months		535		40		114		689		474,547		475,236		81
Construction residential real estate    < 60 months		1,320		282		148		1,750		301,555		303,305		—
Residential real estate first lien		3,415		1,076		844		5,335		1,112,564		1,117,899		349
Residential real estate all other		265		37		185		487		195,711		196,198		166
Agriculture		2,357		34		2,265		4,656		403,381		408,037		1,054
Commercial non-real estate		2,490		2,142		2,772		7,404		1,234,050		1,241,454		345
Consumer non-real estate		2,591		648		585		3,824		442,932		446,756		467
Oil and gas		654		—		—		654		462,380		463,034		—
Total	$	21,178	$	5,783	$	11,535	$	38,496	$	6,905,067	$	6,943,563	$	7,085

72

Credit Quality Indicators

The Company considers credit quality indicators to monitor the credit risk in the loan portfolio including volume and severity of loan delinquencies, nonaccrual loans, internal grading of loans, historical credit loss experience and economic conditions. These indicators are reviewed and updated regularly throughout the year. An internal risk grading system is used to indicate the credit risk of loans. The loan grades used by the Company are for internal risk identification purposes and do not directly correlate to regulatory classification categories or any financial reporting definitions.

The general characteristics of the risk grades are as follows:

Grade 1 – Acceptable - Loans graded 1 represent reasonable and satisfactory credit risk which requires normal attention and supervision. Capacity to repay through primary and/or secondary sources is not questioned.

Grade 2 – Acceptable - Increased Attention - This category consists of loans that have credit characteristics deserving management’s close attention. These complexities or potential weaknesses could result in deterioration of the repayment prospects for the loan or the Company's credit position at some future date. Such credit characteristics include loans to highly leveraged borrowers in cyclical industries, adverse financial trends which could potentially weaken repayment capacity, loans that have fundamental structure complexity or deficiencies, loans lacking secondary sources of repayment where prudent, and loans with deficiencies in essential documentation, including financial information.

Grade 3 – Loans with Problem Potential - This category consists of performing loans which are considered to exhibit problem potential. Loans in this category would generally include, but not be limited to, borrowers with a weakened financial condition or poor performance history, past dues, loans restructured to reduce payments to an amount that is below market standards and/or loans with severe documentation problems. In general, these loans have no identifiable loss potential in the near future; however, the possibility of a loss developing is heightened.

Grade 4 - Problem Loans/Assets – Nonperforming - This category consists of nonperforming loans/assets which are considered to be problems. Nonperforming loans are described as being 90 days and over past due and still accruing, and loans that are nonaccrual. The government guaranteed portion of SBA loans is excluded.

Grade 5 - Loss Potential - This category consists of loans/assets which are considered to possess loss potential. While the loss may not occur in the current year, management expects that loans/assets in this category will ultimately result in a loss, unless substantial improvement occurs.

Grade 6 - Charge Off - This category consists of loans that are considered uncollectible and other assets with little or no value.

The Company’s revolving loans that are converted to term loans are not material and therefore have not been presented.

The following tables summarizes the Company's gross loans held for investment by year of origination and internally assigned credit grades:

73

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
	(Dollars in thousands)
December 31, 2023
Commercial real estate owner occupied
Grade 1	$	125,041	$	144,429	$	124,113	$	85,619	$	77,400	$	135,064	$	23,004	$	714,670
Grade 2		39,735		61,879		28,506		22,473		19,617		24,199		33,304		229,713
Grade 3		140		3,580		4,262		644		1,432		1,051		2,450		13,559
Grade 4		399		90		—		352		656		1,016		150		2,663
Grade 5		—		—		—		—		339		—		—		339
Total commercial real estate owner occupied		165,315		209,978		156,881		109,088		99,444		161,330		58,908		960,944
Commercial real estate non-owner occupied
Grade 1		221,014		271,637		172,291		113,676		56,831		68,576		44,878		948,903
Grade 2		82,206		139,982		79,204		53,154		63,331		72,075		28,844		518,796
Grade 3		2,135		6,666		1,715		—		6,207		251		—		16,974
Grade 4		200		632		349		—		—		566		—		1,747
Total commercial real estate non-owner occupied		305,555		418,917		253,559		166,830		126,369		141,468		73,722		1,486,420
Construction and development < 60 months
Grade 1		124,218		133,254		65,472		5,828		3,392		5,019		76,831		414,014
Grade 2		95,138		43,884		28,772		6,625		13,406		2,146		34,559		224,530
Grade 3		2,051		893		101		235		—		19		—		3,299
Grade 4		—		800		—		—		—		—		—		800
Total construction and development < 60 months		221,407		178,831		94,345		12,688		16,798		7,184		111,390		642,643
Construction residential real estate < 60 months
Grade 1		158,161		7,551		1,421		100		105		467		49,284		217,089
Grade 2		57,172		2,365		27		12		—		—		98		59,674
Grade 3		5,457		387		—		—		—		—		—		5,844
Grade 4		673		206		—		—		—		—		—		879
Total construction residential real estate <60 months		221,463		10,509		1,448		112		105		467		49,382		283,486
Residential real estate first lien
Grade 1		294,363		226,557		174,325		115,055		71,941		149,836		6,047		1,038,124
Grade 2		51,619		39,146		35,226		24,738		12,591		39,264		—		202,584
Grade 3		2,175		2,187		2,630		773		1,140		4,009		—		12,914
Grade 4		759		122		1,144		651		355		2,091		—		5,122
Total residential real estate first lien		348,916		268,012		213,325		141,217		86,027		195,200		6,047		1,258,744
Residential real estate all other
Grade 1		44,475		24,861		8,381		8,122		3,753		12,827		46,479		148,898
Grade 2		4,244		5,819		1,415		1,652		1,308		2,527		74,388		91,353
Grade 3		355		262		198		40		23		391		1,942		3,211
Grade 4		119		24		—		—		55		89		947		1,234
Total residential real estate all other		49,193		30,966		9,994		9,814		5,139		15,834		123,756		244,696
Agriculture
Grade 1		52,934		51,099		34,840		26,603		17,863		33,052		46,981		263,372
Grade 2		28,829		20,931		18,245		9,826		8,207		15,833		41,018		142,889
Grade 3		9,516		1,185		789		2,570		296		2,372		2,454		19,182
Grade 4		265		633		55		131		370		241		1		1,696
Total agriculture		91,544		73,848		53,929		39,130		26,736		51,498		90,454		427,139
Commercial non-real estate
Grade 1		252,112		176,013		159,470		39,097		36,907		33,824		277,740		975,163
Grade 2		95,590		35,955		19,519		6,591		6,456		8,071		127,800		299,982
Grade 3		2,206		2,598		1,011		109		121		164		1,779		7,988
Grade 4		1,181		1,691		400		686		309		154		1,425		5,846
Grade 5		—		—		—		—		473		—		—		473
Total commercial non-real estate		351,089		216,257		180,400		46,483		44,266		42,213		408,744		1,289,452
Consumer non-real estate
Grade 1		211,028		105,365		55,079		18,529		8,939		3,301		22,184		424,425
Grade 2		19,085		14,919		6,764		2,062		702		910		2,085		46,527
Grade 3		941		1,424		932		326		299		156		11		4,089
Grade 4		361		452		409		117		72		10		5		1,426
Total consumer non-real estate		231,415		122,160		63,184		21,034		10,012		4,377		24,285		476,467
Oil and gas
Grade 1		147,902		29,658		72,127		13,898		1,553		15,015		180,321		460,474
Grade 2		66,080		4,851		1,019		402		279		177		50,201		123,009
Grade 3		1,758		132		225		—		—		—		323		2,438
Grade 4		313		83		166		—		10		161		—		733
Total oil and gas		216,053		34,724		73,537		14,300		1,842		15,353		230,845		586,654
Total loans held for investment	$	2,201,950	$	1,564,202	$	1,100,602	$	560,696	$	416,738	$	634,924	$	1,177,533	$	7,656,645

74

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
	2022		2021		2020		2019		2018		Prior		Amortized Cost Basis		Total
	(Dollars in thousands)
December 31, 2022
Commercial real estate owner occupied
Grade 1	$	173,596	$	145,425	$	106,285	$	91,892	$	44,086	$	119,755	$	53,026	$	734,065
Grade 2		34,774		34,283		27,153		17,999		8,528		29,638		14,737		167,112
Grade 3		235		1,718		387		1,334		332		1,161		62		5,229
Grade 4		40		269		—		1,110		180		489		—		2,088
Total commercial real estate owner occupied		208,645		181,695		133,825		112,335		53,126		151,043		67,825		908,494
Commercial real estate non-owner occupied
Grade 1		349,333		239,369		170,186		107,983		24,075		66,546		45,372		1,002,864
Grade 2		115,372		50,573		29,031		46,870		24,877		69,601		31,928		368,252
Grade 3		7,677		—		153		2,733		64		1,318		—		11,945
Grade 4		—		—		—		—		42		47		—		89
Total commercial real estate non-owner occupied		472,382		289,942		199,370		157,586		49,058		137,512		77,300		1,383,150
Construction and development < 60 months
Grade 1		164,865		92,595		39,819		5,558		3,146		4,993		40,474		351,450
Grade 2		36,090		20,273		1,413		14,248		1,648		774		47,973		122,419
Grade 3		967		—		141		—		—		8		158		1,274
Grade 4		—		—		33		47		—		13		—		93
Total construction and development < 60 months		201,922		112,868		41,406		19,853		4,794		5,788		88,605		475,236
Construction residential real estate < 60 months
Grade 1		209,699		12,612		259		18		—		42		36,114		258,744
Grade 2		39,174		1,152		102		—		—		400		2,091		42,919
Grade 3		1,212		—		—		—		—		—		—		1,212
Grade 4		420		10		—		—		—		—		—		430
Total construction residential real estate < 60 months		250,505		13,774		361		18		—		442		38,205		303,305
Residential real estate first lien
Grade 1		303,369		205,377		141,752		85,850		55,631		136,776		4,242		932,997
Grade 2		46,751		36,453		25,623		13,414		11,687		37,167		—		171,095
Grade 3		1,940		1,903		1,065		1,689		497		3,826		—		10,920
Grade 4		55		311		175		386		144		1,816		—		2,887
Total residential real estate first lien		352,115		244,044		168,615		101,339		67,959		179,585		4,242		1,117,899
Residential real estate all other
Grade 1		31,741		11,012		10,696		5,458		3,607		11,198		41,653		115,365
Grade 2		5,683		1,887		1,744		1,589		1,237		2,574		62,395		77,109
Grade 3		381		186		71		50		201		786		1,828		3,503
Grade 4		—		18		28		32		39		53		51		221
Total residential real estate all other		37,805		13,103		12,539		7,129		5,084		14,611		105,927		196,198
Agriculture
Grade 1		73,722		44,037		35,684		22,094		12,064		31,517		42,542		261,660
Grade 2		28,351		22,773		9,638		10,548		6,025		15,233		33,844		126,412
Grade 3		6,435		476		3,427		140		320		2,703		4,452		17,953
Grade 4		660		221		498		80		144		393		16		2,012
Total agriculture		109,168		67,507		49,247		32,862		18,553		49,846		80,854		408,037
Commercial non-real estate
Grade 1		282,252		205,516		67,229		50,725		13,780		40,989		280,774		941,265
Grade 2		88,017		46,604		17,420		11,447		15,628		3,582		105,783		288,481
Grade 3		2,093		461		346		738		1,566		180		2,544		7,928
Grade 4		240		415		656		745		348		929		183		3,516
Grade 5		—		—		—		264		—		—		—		264
Total commercial non-real estate		372,602		252,996		85,651		63,919		31,322		45,680		389,284		1,241,454
Consumer non-real estate
Grade 1		203,238		104,380		39,779		21,035		6,589		2,187		26,263		403,471
Grade 2		21,011		10,538		3,978		1,541		822		1,340		825		40,055
Grade 3		827		671		405		282		134		63		4		2,386
Grade 4		229		351		54		141		56		13		—		844
Total consumer non-real estate		225,305		115,940		44,216		22,999		7,601		3,603		27,092		446,756
Oil and gas
Grade 1		24,303		125,209		16,482		682		1,678		880		199,995		369,229
Grade 2		7,610		10,668		766		23,040		3,167		327		45,240		90,818
Grade 3		2,117		47		5		—		—		—		498		2,667
Grade 4		—		320		—		—		—		—		—		320
Total oil and gas		34,030		136,244		17,253		23,722		4,845		1,207		245,733		463,034
Total loans held for investment	$	2,264,479	$	1,428,113	$	752,483	$	541,762	$	242,342	$	589,317	$	1,125,067	$	6,943,563

75

The following tables summarize the Company’s gross charge-offs by year of origination for the periods indicated:

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
	(Dollars in thousands)
Year ended December 31, 2023
Commercial real estate owner occupied
Current-period gross charge-offs	$	174	$	196	$	26	$	203	$	165	$	158	$	—	$	922
Commercial real estate non-owner occupied
Current-period gross charge-offs		—		—		—		—		—		3		—		3
Construction and development < 60 months
Current-period gross charge-offs		—		3		—		2		—		1		—		6
Construction residential real estate < 60 months
Current-period gross charge-offs		—		94		—		—		—		—		—		94
Residential real estate first lien
Current-period gross charge-offs		—		—		91		44		5		25		—		165
Residential real estate all other
Current-period gross charge-offs		—		4		19		—		1		36		—		60
Agriculture
Current-period gross charge-offs		—		154		9		317		14		2		—		496
Commercial non-real estate
Current-period gross charge-offs		390		351		111		22		51		160		—		1,085
Consumer non-real estate
Current-period gross charge-offs		312		632		261		45		41		40		19		1,350
Oil and gas
Current-period gross charge-offs		57		2		—		—		—		—		—		59
Total current-period gross charge-offs	$	933	$	1,436	$	517	$	633	$	277	$	425	$	19	$	4,240

Allowance for Credit Losses Methodology

The Company determines its provision for credit losses and allowance for credit losses using the current expected credit loss methodology that is referred to as the current expected credit loss ("CECL") model. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist.

The Company elected to utilize a methodology known as vintage loss analysis for BancFirst, Pegasus, and Worthington. Vintage loss analysis measures impairment based on the age of the accounts and the historical asset performance of assets with similar risk characteristics. Vintage loss analysis determines expected losses by allowing the Company to calculate the cumulative loss rates of a given loan pool and in so doing, determine the loan pool’s lifetime expected loss experience relative to the appropriate type of financial assets that share similar risk characteristics. Vintage loss analysis uses different “vintages” analyzed by year of origination through the weighted average maturity of each loan pool. The key quantitative inputs used in the Company’s estimate of the allowance for credit losses include 1) all available loan data tracked by year of origination, 2) total charge-offs for each specific loan pool recorded since year of origination, 3) recovery rate calculated by the average recovery over the previous seven years across all loan pools, and 4) a weighting factor biased to more recent loss experience. The quantitative expected credit loss is calculated by dividing each year’s net charge-offs by the original balance. The respective vintage’s original balance remains the denominator in each annual calculation, as it references the specific vintage’s initial balance. The loss experience of this original balance is tracked annually and summed over the life of the loan for each separate loan pool, leaving a cumulative life of credit loss rate based on historic averages weighted towards more recent loss experience. These key quantitative inputs change from period to period as new loans are originated, and charge-offs and recoveries are recognized. The recovery rate is revised on an annual basis, taking into consideration the most recent seven years. The weighting factor percentages remain static, however, the most recent year receives the highest weighting percentage.

The BancFirst Senior Loan Committee (“the SLC”) sets BancFirst qualitative adjustments. In setting the qualitative adjustments, they consider several factors, including external economic information, peer bank comparisons and experience with the loan portfolio. The SLC also considers Moody’s Analytics dataset. From this dataset, BancFirst selects a range of 4 probability scenarios from two economic forecasts. To determine the appropriate correlation to our loss experience, BancFirst compares the economic indicators over

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the past ten years of charge-off history to arrive at a correlation factor. BancFirst then applies the correlation factor to the change in the forecast of the aforementioned economic indicators over the next 18-24 months, which is driven by management’s judgment of a reasonable and supportable forecast period to arrive at a percentage range of qualitative loss adjustment attributable to economic forecasts. The SLC establishes a qualitative adjustment for each loan pool using these factors. For periods beyond which BancFirst is able to make or obtain reasonable and supportable forecasts of expected credit losses, BancFirst reverts to historical loss information.

In some cases, management may determine a loan to be collateral dependent. A loan is considered collateral-dependent when the repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty based on the Company's assessment as of the reporting date. For collateral dependent loans, the standard allows institutions to use, as a practical expedient, the fair value of the collateral to measure expected credit losses on collateral-dependent financial assets. This amount is included in the allowance for credit losses.

The increase in allowance for credit losses during 2023 was related to loan growth during the year. The increase in allowance for credit losses during 2022 was related to the purchase of loans without credit deterioration during the year along with loan growth.

The following table details activity in the allowance for credit losses on loans for the period presented. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

	Allowance for Credit Losses
	Balance at beginning of period		Charge- offs			Recoveries		Net charge-offs			Provision for/(benefit from) credit losses on loans			Balance at end of period
	(Dollars in thousands)
Year ended December 31, 2023
Real estate:
Commercial real estate owner occupied	$	6,416	$	(922	)	$	68	$	(854	)	$	1,921		$	7,483
Commercial real estate non-owner occupied		30,190		(3	)		—		(3	)		2,893			33,080
Construction and development < 60 months		3,778		(6	)		11		5			167			3,950
Construction residential real estate < 60 months		3,275		(94	)		—		(94	)		233			3,414
Residential real estate first lien		4,092		(165	)		15		(150	)		972			4,914
Residential real estate all other		1,418		(60	)		5		(55	)		283			1,646
Agriculture		6,217		(496	)		127		(369	)		289			6,137
Commercial non-real estate		25,106		(1,085	)		446		(639	)		(1,722	)		22,745
Consumer non-real estate		4,132		(1,350	)		182		(1,168	)		1,437			4,401
Oil and gas		8,104		(59	)		—		(59	)		985			9,030
Total	$	92,728	$	(4,240	)	$	854	$	(3,386	)	$	7,458		$	96,800

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	Allowance for Credit Losses
	Balance at beginning of period		Initial allowance on loans purchased with credit deterioration		Charge- offs			Recoveries		Net charge-offs			Provision for/(benefit from) credit losses on loans			Balance at end of period
	(Dollars in thousands)
Year ended December 31, 2022
Real estate:
Commercial real estate owner occupied	$	7,550	$	—	$	(20	)	$	507	$	487		$	(1,621	)	$	6,416
Commercial real estate non-owner occupied		16,807		—		—			—		—			13,383			30,190
Construction and development < 60 months		3,454		—		(93	)		12		(81	)		405			3,778
Construction residential real estate    < 60 months		1,051		—		—			—		—			2,224			3,275
Residential real estate first lien		3,048		2		(106	)		87		(19	)		1,061			4,092
Residential real estate all other		1,567		—		(38	)		405		367			(516	)		1,418
Agriculture		8,392		—		(205	)		13		(192	)		(1,983	)		6,217
Commercial non-real estate		25,565		44		(1,551	)		209		(1,342	)		839			25,106
Consumer non-real estate		3,694		25		(768	)		193		(575	)		988			4,132
Oil and gas		12,808		—		—			—		—			(4,704	)		8,104
Total	$	83,936	$	71	$	(2,781	)	$	1,426	$	(1,355	)	$	10,076		$	92,728

Purchased Credit Deteriorated Loans

The Company has purchased loans, for which there was, at acquisition, evidence of more than insignificant deterioration of credit quality since origination. The Company did not purchase credit-deteriorated loans during the year ended December 31, 2023. The credit-deteriorated loans purchased during the year ended December 31, 2022 were as follows:

	Loans acquired with deteriorated credit quality
	(Dollars in thousands)
For the year ended December 31, 2022
Purchase price of loans at acquisition	$	668
Allowance for credit losses at acquisition		71
Par value of acquired loans at acquisition	$	739

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Collateral Dependent Loans

A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. During the years ended December 31, 2023 and 2022, no material amount of interest income was recognized on collateral-dependent loans subsequent to their classification as collateral-dependent. The following table summarizes collateral-dependent gross loans held for investment by collateral type and the related specific allocation as follows:

	Collateral Type
	Real Estate		Business Assets		Energy Reserves		Other Assets		Total		Specific Allocation
As of December 31, 2023	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate non-owner occupied		632		—		—		—		632		250
Construction and development < 60 months		800		—		—		—		800		225
Construction residential real estate < 60 months		638		—		—		—		638		134
Residential real estate first lien		189		—		—		—		189		62
Residential real estate all other		140		—		—		—		140		140
Agriculture		1,841		593		—		15		2,449		1,386
Commercial non-real estate		—		6,090		—		241		6,331		1,867
Consumer non-real estate		—		—		—		147		147		88
Oil and gas		—		—		—		—		—		—
Total collateral-dependent loans held for investment	$	4,240	$	6,683	$	—	$	403	$	11,326	$	4,152
	Collateral Type
	Real Estate		Business Assets		Energy Reserves		Other Assets		Total		Specific Allocation
As of December 31, 2022	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	2,213	$	—	$	—	$	—	$	2,213	$	870
Commercial real estate non-owner occupied		1,263		—		—		—		1,263		333
Construction and development < 60 months		—		—		—		—		—		—
Construction residential real estate < 60 months		420		—		—		—		420		45
Residential real estate first lien		481		—		—		—		481		207
Residential real estate all other		9		—		—		—		9		9
Agriculture		3,447		701		—		3,592		7,740		3,114
Commercial non-real estate		—		5,924		—		4		5,928		1,938
Consumer non-real estate		—		—		—		117		117		81
Oil and gas		—		—		—		—		—		—
Total collateral-dependent loans held for investment	$	7,833	$	6,625	$	—	$	3,713	$	18,171	$	6,597

Non-Cash Transfers from Loans and Premises and Equipment

Transfers from loans and premises and equipment to other real estate owned, repossessed assets, and other assets are non-cash transactions, and are not included in the consolidated statements of cash flow.

Transfers from loans and premises and equipment to other real estate owned, repossessed assets, and other assets during the periods presented are summarized as follows:

	Year ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Other real estate owned	$	3,459	$	2,563	$	12,651
Repossessed assets		2,019		1,040		844
Other assets		—		1,943		—
Total	$	5,478	$	5,546	$	13,495

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Related Party Loans

The Company has made loans in the ordinary course of business to the executive officers and directors of the Company and to certain affiliates of these executive officers and directors. Management believes that all such loans were made on substantially the same terms as those prevailing at the time for comparable transactions with other persons and do not represent more than a normal risk of collectability or present other unfavorable features. A summary of these loans is as follows:

Year Ended December 31,	Balance Beginning of the Period		Additions		Collections/ Terminations			Balance End of the Period
	(Dollars in thousands)
2023	$	23,167	$	106,819	$	(45,722	)	$	84,264
2022		28,292		46,124		(51,249	)		23,167
2021		22,057		31,574		(25,339	)		28,292

(6) PREMISES AND EQUIPMENT, NET AND OTHER ASSETS

The following is a summary of premises and equipment by classification:

		December 31,
	Estimated Useful Lives	2023			2022
		(Dollars in thousands)
Land		$	49,173		$	47,856
Buildings	10 to 40 years		288,391			266,660
Furniture, fixtures and equipment	3 to 15 years		94,851			91,340
Construction in progress			4,213			16,613
Accumulated depreciation			(158,034	)		(144,381	)
Premises and equipment, net		$	278,594		$	278,088

Non-cash items in Premises and Equipment, Net

The Company had $195,000 in construction in progress for retainage payable at December 31, 2023 and $1.1 million at December 31, 2022. Retainage payable is not remitted to the vendor until completion of the project and is therefore not included in the consolidated statements of cash flow.

Construction in Progress

Construction in progress included in the table above is primarily related to the renovation of BancFirst Tower, which began in 2018. When renovations on the building are completed, the asset is reclassified as buildings and depreciated over its applicable useful life.

Other Assets

Other assets includes the cash surrender value of key-man life insurance policies totaling $84.4 million at December 31, 2023 and $82.7 million at December 31, 2022.

Equity securities are reported in other assets on the consolidated balance sheet. The Company invests in equity securities without readily determinable fair values. These equity securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income. The balance of equity securities was $13.1 million at December 31, 2023 and $15.5 million at December 31, 2022.

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The balance of other assets included an equity interest of a former borrower in the oil and gas industry, which was received through bankruptcy proceedings, with a value of $21.4 million at December 31, 2022. This equity interest was sold during the second quarter of 2023 resulting in a zero balance at December 31, 2023. Under the equity method, the carrying value of a bank’s investment in an investee is originally recorded at cost but is adjusted periodically to record as income the bank’s proportionate share of the investee’s earnings or losses and decreased by the amount of cash dividends or similar distributions received from the investee.

Low Income Housing Tax Credit Investments

The Company invests in affordable housing projects that qualify for the low-income housing tax credit (LIHTC), which is designed to promote private development of low-income housing. These investments generate a return primarily through realization of federal tax credits, and also through a tax deduction generated by operating losses of the investments. The investments are amortized through tax expense using the proportional amortization method as related tax credits are utilized. The Company is periodically required to provide additional contributions at the discretion of the project sponsors. Although in some cases the Company’s investment may exceed 50% of the equity interest in an entity, the Company does not consolidate these structures as variable interest entities due to the project sponsor’s ability to manage the projects, which is indicative of power over them.

Total LIHTC investments were $46.4 million and $24.7 million at December 31, 2023 and 2022, respectively and are included in other assets on the consolidated balance sheet. The Company recognized tax credits and other tax benefits of $7.3 million, $6.4 million and $6.5 million in 2023, 2022 and 2021, respectively and amortization expense of $5.6 million, $5.1 million and $5.5 million in 2023, 2022 and 2021, respectively resulting from LIHTC investments. Additional contributions are committed during the investment periods through the year 2035. Unfunded commitments to these investments as of December 31, 2023 totaled $26.8 million.

New Market Tax Credit Investments

The Company also invests in active low-income community businesses that qualify for New Market Tax Credits (NMTC). NMTC investments are made through Community Development Entities (CDEs) and such entities are qualified through the US Department of the Treasury. NMTCs are earned for a qualified entity investment made by a taxpayer in a CDE if substantially all of the investment is used by the CDE to make qualified investments. It is through its equity contributions into the CDE entities that the Company is able to receive the benefits of the NMTCs. The amount of the NMTC is equal to 39% of the qualified investment taken over a seven year period. The investments are amortized through tax expense using the proportional amortization method as related tax credits are utilized. The Company does not consolidate these CDEs as variable interest entities due to the control the allocatee of the tax credits has over the entity.

Total NMTC investments were $12.1 million and $11.3 million at December 31, 2023 and 2022, respectively, and are included in other assets on the consolidated balance sheet. The Company recognized tax credits of $5.6 million, $4.7 million and $4.0 million in 2023, 2022 and 2021, respectively and amortization expense of $4.6 million, $3.9 million, and $3.3 million in 2023, 2022 and 2021, respectively resulting from NMTC investments. NMTC investments are funded in full in the year they begin. There are no unfunded commitments.

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(7) INTANGIBLE ASSETS AND GOODWILL

The following is a summary of intangible assets:

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Dollars in thousands)
As of December 31, 2023
Core deposit intangibles	$	33,550	$	(17,027	)	$	16,523
Customer relationship intangibles		3,350		(3,169	)		181
Total	$	36,900	$	(20,196	)	$	16,704
As of December 31, 2022
Core deposit intangibles	$	33,298	$	(13,615	)	$	19,683
Customer relationship intangibles		3,350		(3,050	)		300
Total	$	36,648	$	(16,665	)	$	19,983

Estimated amortization of intangible assets for the next five years, as of December 31, 2023, is as follows (dollars in thousands):

Estimated Amortization
2024	$	3,474
2025		3,249
2026		2,645
2027		2,641
2028		1,821

At December 31, 2023, the weighted-average remaining life of all intangible assets was approximately 5.8 years, which consisted of customer relationship intangibles with a weighted-average life of 1.6 years and core deposit intangibles with a weighted-average life of 5.9 years.

The following is a summary of goodwill by business segment:

	BancFirst Metropolitan Banks		BancFirst Community Banks		Pegasus		Worthington		Other Financial Services		Executive, Operations & Support		Consolidated
	(Dollars in thousands)
Year Ended December 31, 2023
Balance at beginning of period	$	13,767	$	61,212	$	68,855	$	32,133	$	5,464	$	624	$	182,055
Acquisitions		—		208		—		—		—		—		208
Balance at end of period	$	13,767	$	61,420	$	68,855	$	32,133	$	5,464	$	624	$	182,263
Year Ended December 31, 2022
Balance at beginning of period	$	13,767	$	61,212	$	68,855	$	—	$	5,464	$	624	$	149,922
Acquisitions		—		—		—		32,133		—		—		32,133
Balance at end of period	$	13,767	$	61,212	$	68,855	$	32,133	$	5,464	$	624	$	182,055

The Company purchased a branch from RCB Bank on July 20, 2023, which added goodwill as shown in the table above. The Company acquired Worthington on February 8, 2022, which added core deposit intangibles and goodwill shown in the tables above. See Note (2) of the Notes to Consolidated Financial Statements for disclosure regarding the Company’s recent developments, including mergers and acquisitions.

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(8) DEPOSITS

Year-end deposits were as follows:

	December 31,
	2023		2022
	(Dollars in thousands)
Noninterest-bearing demand deposits	$	3,982,226	$	4,944,730
Money market and interest-bearing checking deposits		4,699,865		4,173,268
Savings deposits		1,056,404		1,143,176
Time deposits		961,627		713,054
Total deposits	$	10,700,122	$	10,974,228

The aggregate amount of overdrawn customer transaction deposits that have been reclassified as loan balances was $6.2 million at December 31, 2023 and $4.4 million at December 31, 2022.

Time deposits include certificates of deposit and individual retirement accounts. At December 31, 2023, the scheduled maturities of all time deposits are as follows (Dollars in thousands):

2024	$	774,008
2025		120,976
2026		27,347
2027		17,093
2028		22,199
Thereafter		4
Total	$	961,627

The following table is a summary of time deposits that meet or exceed the current Federal Deposit Insurance Corporation ("FDIC") insurance limit for the periods presented:

	December 31,
	2023		2022
	(Dollars in thousands)
Time deposits of $250,000 or more	$	299,018	$	224,517

(9) SHORT-TERM BORROWINGS

The following is a summary of short-term borrowings:

	December 31,
	2023			2022
	(Dollars in thousands)
Federal funds purchased	$	2,525		$	300
Repurchase agreements		826			—
Total short-term borrowings	$	3,351		$	300
Weighted average interest rate		4.84	%		1.39	%
End of period interest rate		4.06	%		4.30	%

Federal funds purchased represent borrowings of overnight funds from other financial institutions.

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The Company enters into sales of securities to certain of its customers with simultaneous agreements to repurchase. These agreements represent an overnight borrowing of funds.

(10) LINES OF CREDIT

BancFirst has a line of credit from the FHLB of Topeka, Kansas to use for liquidity or to match-fund certain long-term fixed rate loans. BancFirst's assets, including residential first mortgages of $1.1 billion, are pledged as collateral for the borrowings under the line of credit. As of December 31, 2023, BancFirst had the ability to draw up to $793.3 million on the FHLB line of credit based on FHLB stock holdings of $658,300 with no advances outstanding. In addition, BancFirst has a $25.0 million line of credit with another financial institution that is an overnight federal funds facility. As of December 31, 2023, BancFirst had no advances outstanding under either line of credit. Worthington has $10.5 million in lines of credit with other financial institutions that serve as overnight federal funds facilities, a Federal Reserve discount window capacity of $26.3 million, a $75.2 million line of credit from the FHLB of Dallas, Texas to use for liquidity or to match-fund certain long-term fixed rate loans, and a brokered certificate of deposit capacity of $72.1 million. Worthington had no advances outstanding as of December 31, 2023 under any line of credit.

(11) SUBORDINATED DEBT

In January 2004, the Company established BFC Capital Trust II (“BFC II”), a trust formed under the Delaware Business Trust Act. The Company owns all of the common securities of BFC II. In February 2004, BFC II issued $25 million of aggregate liquidation amount of 7.20% Cumulative Trust Preferred Securities (the “Cumulative Trust Preferred Securities”) to other investors. In March 2004, BFC II issued an additional $1 million in Cumulative Trust Preferred Securities through the execution of an over-allotment option. The proceeds from the sale of the Cumulative Trust Preferred Securities and the common securities of BFC II were invested in $26.8 million of 7.20% Junior Subordinated Debentures of the Company. Interest payments on the $26.8 million of 7.20% Junior Subordinated Debentures are payable January 15, April 15, July 15 and October 15 of each year. Such interest payments may be deferred for up to twenty consecutive quarters. The stated maturity date of the $26.8 million of 7.20% Junior Subordinated Debentures is March 31, 2034, but they are subject to mandatory redemption pursuant to optional prepayment terms. The Cumulative Trust Preferred Securities represent an undivided interest in the $26.8 million of 7.20% Junior Subordinated Debentures and are guaranteed by the Company. During any deferral period or during any event of default, the Company may not declare or pay any dividends on any of its capital stock. The Cumulative Trust Preferred Securities have been callable at par, in whole or in part, since March 31, 2009.

On June 17, 2021, the Company completed a private placement, under Regulation D of the Securities Act of 1933, of $60 million aggregate principal amount of 3.50% Fixed-to-Floating Rate Subordinated Notes due 2036 (the “Subordinated Notes”) to various institutional accredited investors. The sale of the Subordinated Notes was pursuant to a Subordinated Note Purchase Agreement entered into with each of the investors. The Subordinated Notes have been structured to qualify as Tier 2 capital under bank regulatory guidelines. The net proceeds to the Company from the sale of the Subordinated Notes were $59.15 million after deducting commissions and offering expenses of $850,000. The Company used the proceeds from the sale of the Subordinated Notes for general corporate purposes. The Subordinated Notes will initially bear interest at a fixed rate of 3.50% per annum, from and including June 17, 2021 to but excluding June 30, 2031, payable semi-annually in arrears on June 30 and December 31 of each year, commencing December 31, 2021. Then, from and including June 30, 2031, to but excluding the maturity date, the Subordinated Notes will bear interest at a floating rate equal to the benchmark (initially, three-month term SOFR), reset quarterly, plus a spread of 229 basis points, payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year. The Subordinated Notes mature on June 30, 2036.

The Company may, at its option, beginning with the interest payment date of June 30, 2031, and on any scheduled interest payment date thereafter, redeem the Subordinated Notes, in whole or in part. In addition, the Company may redeem all, but not less than all, of the Subordinated Notes at any time upon the occurrence of a “Tier 2 Capital Event,” a “Tax Event” or an “Investment Company Event” (each as defined in the Subordinated Notes). Any such redemption is subject to obtaining the prior approval of the Board of Governors of the Federal Reserve System (or its designee). The redemption price with respect to any such redemption will be equal to 100% of the principal amount of the Subordinated Note, or portion thereof, to be redeemed, plus accrued but unpaid interest, if any, thereon to, but excluding, the redemption date.

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(12) INCOME TAXES

The components of the Company’s income tax expense (benefit) are as follows:

	Year Ended December 31,
	2023			2022		2021
	(Dollars in thousands)
Current taxes:
Federal	$	53,247		$	39,197	$	28,359
State		7,023			4,813		5,365
Deferred taxes		(2,787	)		322		7,044
Total income taxes	$	57,483		$	44,332	$	40,768

Income tax (benefit) expense applicable to securities transactions approximated $(384,000), $453,000 and $220,000 for the years ended December 31, 2023, 2022 and 2021, respectively.

A reconciliation of tax expense at the federal statutory tax rate applied to income before taxes is presented in the following table. The federal statutory tax rate was 21% in 2023, 2022 and 2021:

	Year Ended December 31,
	2023			2022			2021
	(Dollars in thousands)
Tax expense at the federal statutory tax rate	$	56,689		$	49,861		$	43,764
Increase (decrease) in tax expense from:
Tax-exempt income, net		(343	)		(337	)		(436	)
Modified endowment life contracts		(497	)		(487	)		(501	)
Share based compensation excess tax benefit		(786	)		(2,905	)		(1,643	)
Tax deductible dividends paid on ESOP		(505	)		(481	)		(490	)
State tax expense, net of federal tax benefit		4,945			3,788			4,779
Bargain purchase gain		—			—			(1,007	)
Utilization of tax credits:
New markets tax credits, net of amortization		(777	)		(3,745	)		(3,192	)
Low-income housing tax credits, net of amortization		(1,106	)		(1,024	)		(1,533	)
Other tax credits, net of amortization		(192	)		(91	)		(379	)
Other, net		55			(247	)		1,406
Total tax expense	$	57,483		$	44,332		$	40,768

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The net deferred tax asset consisted of the following and is reported in other assets:

	December 31,
	2023			2022
	(Dollars in thousands)
Unrealized net losses on securities	$	15,473		$	22,107
Provision for credit losses		22,782			20,988
Write-downs of other real estate owned		2,522			938
Deferred compensation		2,116			2,142
Stock-based compensation		2,199			1,643
Investments in partnership interests		7,260			6,056
Other		911			1,123
Gross deferred tax assets		53,263			54,997
Intangibles		(5,639	)		(6,346	)
Basis difference related to tax credits		(5,462	)		(4,118	)
Depreciation		(21,833	)		(20,360	)
Prepaid expense deducted		(1,243	)		(1,139	)
Other		(181	)		(283	)
Gross deferred tax liabilities		(34,358	)		(32,246	)
Net deferred tax asset	$	18,905		$	22,751

The Company recognizes accrued interest and penalties related to unrecognized tax benefits, if applicable, in income tax expense. During the years ended December 31, 2023, 2022 and 2021, the Company did not recognize or accrue any interest and penalties related to unrecognized tax benefits. Federal and various state income tax statutes dictate that tax returns filed in any of the previous three reporting periods remain open to examination, which includes tax return years 2020 to 2022. The Company has no open examinations with either the Internal Revenue Service or any state agency.

Management performs an analysis of the Company’s tax position annually and believes it is more likely than not that all of its tax positions will be utilized in future years.

(13) STOCK-BASED COMPENSATION

On May 25, 2023, the shareholders of the Company adopted the BancFirst Corporation 2023 Restricted Stock Unit Plan (the "RSU Plan"). The RSU Plan was effective as of June 1, 2023 and for a period of ten years thereafter. The RSU Plan will continue in effect after such ten-year period until all matters relating to the payment of awards and administration of the RSU Plan have been settled. At December 31, 2023 there were 467,925 shares available for future grants. The restricted stock units ("RSU's") vest beginning two years from the date of grant at the rate of 20% per year for five years. The RSUs are settled and distributed as of each vesting date. The fair value of each RSU granted is equal to the market price of the Company’s stock at the date of grant.

The following table is a summary of the activity under the Company's RSU plan.

			Wgtd. Avg.
	Restricted		Grant Date
	Stock Units		Fair Value
Year Ended December 31, 2023
Nonvested at December 31, 2022		—
Granted		32,075	$	87.23
Nonvested at December 31, 2023		32,075

The Company has had the BancFirst Corporation Directors’ Deferred Stock Compensation Plan (the “Deferred Stock Compensation Plan”) since May 1999. As of December 31, 2023, there are 18,186 shares available for future issuance under the Deferred Stock Compensation Plan. The Deferred Stock Compensation Plan will terminate on December 31, 2024, if not extended. Under the plan, directors and members of the community advisory boards of the Company and its subsidiaries may defer up to 100% of their board fees. They are credited for each deferral with a number of stock units based on the current market price of the Company’s stock, which

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accumulate in an account until such time as the director or community board member terminates serving as a board member. Shares of common stock of the Company are then distributed to the terminating director or community board member based upon the number of stock units accumulated in his or her account. There were 18,136 and 30,982 shares of common stock distributed from the Deferred Stock Compensation Plan during the years ended December 31, 2023 and 2022, respectively.

A summary of the accumulated stock units is as follows:

	December 31,
	2023		2022
Accumulated stock units		119,575		129,609
Average price	$	40.03	$	34.91

The Company had the BancFirst Corporation Stock Option Plan (the “Employee Plan”), which was terminated on June 1, 2023. The remaining options will continue to vest and are exercisable beginning four years from the date of grant at the rate of 25% per year for four years, and expire no later than the end of fifteen years from the date of grant.

The Company had the BancFirst Corporation Non-Employee Directors’ Stock Option Plan (the “Non-Employee Directors’ Plan”), which was terminated on June 1, 2023. The remaining options will continue to vest and are exercisable beginning one year from the date of grant at the rate of 25% per year for four years, and expire no later than the end of fifteen years from the date of grant.

The following table is a summary of the activity under both the Employee Plan and the Non-Employee Directors’ Plan:

						Wgtd. Avg.
				Wgtd. Avg.		Remaining	Aggregate
				Exercise		Contractual	Intrinsic
	Options			Price		Term	Value
	(Dollars in thousands, except option data)
Year Ended December 31, 2023
Outstanding at December 31, 2022		1,310,290		$	52.51
Options exercised		(60,024	)		34.83
Options canceled, forfeited, or expired		(8,875	)		86.42
Outstanding at December 31, 2023		1,241,391			53.12	9.70Yrs	$	54,882
Exercisable at December 31, 2023		524,016			34.53	6.39Yrs	$	32,908
Year Ended December 31, 2022
Outstanding at December 31, 2021		1,303,250		$	40.90
Options granted		278,500			87.13
Options exercised		(241,460	)		28.06
Options canceled, forfeited, or expired		(30,000	)		66.31
Outstanding at December 31, 2022		1,310,290			52.51	8.73Yrs	$	46,741
Exercisable at December 31, 2022		489,540			30.82	6.80Yrs	$	28,082

The following table has additional information regarding options exercised under both the Employee Plan and the Non-Employee Directors’ Plan:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Total intrinsic value of options exercised	$	3,055	$	14,837	$	9,264
Cash received from options exercised		2,090		6,776		5,015
Tax benefit realized from options exercised		734		3,567		2,360

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model and is based on certain assumptions including risk-free rate of return, dividend yield, stock price volatility and the expected term. The fair value of each option is expensed over its vesting period. The risk-free interest rate is determined by reference to the spot zero-coupon rate for the U.S.

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Treasury security with a maturity similar to the expected term of the options. The dividend yield is the expected yield for the expected term. The stock price volatility is estimated from the recent historical volatility of the Company’s stock. The expected term is estimated from the historical option exercise experience. The Company accounts for forfeitures as they occur. No stock options were granted during the year ended December 31, 2023.

The following table shows the assumptions used for computing stock-based compensation expense under the fair value method on options granted during the periods presented:

	Year Ended December 31,
	2022		2021
Weighted average grant-date fair value per share of options granted	$	31.90	$	21.16
Risk-free interest rate	1.75 to 4.17%		1.30 to 1.74%
Dividend yield	2.00%		2.00%
Stock price volatility	34.61 to 35.60%		35.55 to 36.39%
Expected term	10 Yrs		10 Yrs

The Company currently uses newly issued shares for stock option exercises and restricted stock units, but reserves the right to use shares purchased under the Company’s Stock Repurchase Program (the “SRP”) in the future.

Although not required or expected, the Company may settle some options or restricted stock units in cash on a limited basis at the discretion of the Company. During the years ended December 31, 2023 and 2022, the Company had no cash settlements. During the year ended December 31, 2021, the Company had cash settlements for 121,330 shares for a total net cash settlement of options of $5.5 million that did not increase the outstanding shares of the Company.

Stock-based compensation expense is charged to salaries and benefits expense on the Consolidated Statements of Comprehensive Income.

The components of stock-based compensation expense for all share-based compensation plans and related tax benefits are as follows:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Stock-based compensation expense	$	2,999	$	1,941	$	2,133
Tax benefit		721		467		513
Stock-based compensation expense, net of tax	$	2,278	$	1,474	$	1,620

The Company will continue to amortize the unearned stock-based compensation expense over the remaining vesting period of approximately five years for unvested stock options and six years for unvested RSU's. The following table shows the unearned stock-based compensation expense for unvested stock options and unvested RSU's:

	December 31, 2023
	(Dollars in thousands)
Unearned stock-based compensation expense for unvested stock options	$	10,316
Unearned stock-based compensation expense for unvested RSU's		2,672

(14) RETIREMENT PLANS

The Company has two separate retirement plans, the Thrift Plan (“401(k)”) and the Employee Stock Ownership Plan (“ESOP”). These two plans cover all eligible employees, as defined in the plans, of the Company and its subsidiaries. The 401(k) allows employees to defer up to the maximum legal limit of their compensation, of which the Company may match up to 3% of their compensation. In addition, the Company may make discretionary contributions based on employee contributions or eligible compensation to the ESOP, as determined by the Company’s Board of Directors. The ESOP sponsor purchases shares from the open market. These shares are

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included in the calculation of the basic earnings per share. Dividends issued on these shares are reinvested into the ESOP. The ESOP is not leveraged. The aggregate amounts of contributions by the Company to the 401(k) and ESOP are shown in the following table:

	December 31,
	2023		2022		2021
	(Dollars in thousands)
401(k) contributions	$	3,410	$	3,011	$	2,856
ESOP contributions		5,747		4,807		4,317
Total contributions	$	9,157	$	7,818	$	7,173

(15) STOCKHOLDERS’ EQUITY

As of December 31, 2023, 2022 and 2021 the Company’s authorized and outstanding preferred and common stock was as follows:

	No. of Shares Authorized at		No. of Shares Outstanding at December 31,						Par Value
Class of Stock	December 31, 2023		2023		2022		2021		Per Share		Dividends	Voting Rights
Senior Preferred		10,000,000		—		—		—	$	1.00	As declared	Voting
10% Cumulative Preferred		900,000		—		—		—		5.00	As declared	Non-voting
Common		40,000,000		32,933,018		32,875,560		32,603,118		1.00	As declared	Voting

The following is a description of the capital stock of the Company:

(a) Senior Preferred Stock: No shares issued or outstanding. Shares may be issued with such voting, dividend, redemption, sinking fund, conversion, exchange, liquidation and other rights as shall be determined by the Company’s Board of Directors, without approval of the stockholders. The Senior Preferred Stock would have a preference over common stock as to payment of dividends, as to the right to distribution of assets upon redemption of such shares or upon liquidation of the Company.

(b) 10% Cumulative Preferred Stock: Redeemable at the Company’s option at $5.00 per share plus accumulated dividends; non-voting; cumulative dividends at the rate of 10% payable semi-annually on January 15 and July 15; no shares issued or outstanding.

(c) Common stock: At December 31, 2023, 2022 and 2021 the shares issued equaled shares outstanding.

The Company has adopted a Stock Repurchase Program (the “SRP”). The SRP may be used as a means to increase earnings per share and return on equity. In addition, the SRP may be used to purchase treasury stock for the exercise of stock options or for distributions under the Deferred Stock Compensation Plan, to provide liquidity for optionees to dispose of stock from exercises of their stock options, and to provide liquidity for stockholders wishing to sell their stock. All shares repurchased under the SRP have been retired and not held as treasury stock. The timing, price and amount of stock repurchases under the SRP may be determined by management and approved by the Company’s Executive Committee.

The following table is a summary of the shares purchased under the program and the shares remaining to be repurchased in the program:

	Year Ended December 31,
	2023		2022		2021
Number of shares repurchased		20,702		—		212,296
Average price of shares repurchased	$	87.88	$	—	$	54.94
Shares remaining to be repurchased		479,784		500,486		500,486

The Company’s ability to pay dividends is dependent upon dividend payments received from BancFirst. Banking regulations limit bank dividends based upon net earnings retained and minimum capital requirements. Dividends in excess of these requirements require regulatory approval. At January 1, 2024, approximately $145.7 million of the equity of BancFirst was available for dividend payments to the Company. During any deferral period or any event of default on the Junior Subordinated Debentures, the Company may not declare or pay any dividends on any of its capital stock.

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BancFirst Corporation, BancFirst, Pegasus and Worthington are subject to risk-based capital guidelines issued by the Board of Governors of the Federal Reserve System and the Federal Deposit Insurance Corporation ("FDIC"). These guidelines are used to evaluate capital adequacy and involve both quantitative and qualitative evaluations of BancFirst Corporation’s, BancFirst’s, Pegasus’s and Worthington's assets, liabilities, and certain off-balance-sheet items calculated under regulatory practices. Failure to meet the minimum capital requirements can initiate certain mandatory or discretionary actions by the regulatory agencies that could have a direct material effect on the Company’s consolidated financial statements. The Company believes that as of December 31, 2023, BancFirst Corporation, BancFirst, Pegasus and Worthington met all capital adequacy requirements to which they are subject. The actual and required capital amounts and ratios are shown in the following table:

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	Actual					Required For Capital Adequacy Purposes					With Capital Conservation Buffer					To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
	(Dollars in thousands)
As of December 31, 2023:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,467,062		16.90	%	$	694,520		8.00	%	$	911,558		10.50	%	N/A		N/A
BancFirst		1,166,750		15.68	%		595,191		8.00	%		781,189		10.50	%	$	743,989		10.00	%
Pegasus		139,472		16.98	%		65,706		8.00	%		86,239		10.50	%		82,132		10.00	%
Worthington		51,608		12.30	%		33,571		8.00	%		44,061		10.50	%		41,963		10.00	%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,284,966		14.80	%	$	390,668		4.50	%	$	607,705		7.00	%	N/A		N/A
BancFirst		1,061,943		14.27	%		334,795		4.50	%		520,792		7.00	%	$	483,593		6.50	%
Pegasus		130,792		15.92	%		36,959		4.50	%		57,492		7.00	%		53,386		6.50	%
Worthington		47,690		11.36	%		18,883		4.50	%		29,374		7.00	%		27,276		6.50	%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,310,966		15.10	%	$	520,890		6.00	%	$	737,928		8.50	%	N/A		N/A
BancFirst		1,081,943		14.54	%		446,393		6.00	%		632,391		8.50	%	$	595,191		8.00	%
Pegasus		130,792		15.92	%		49,279		6.00	%		69,812		8.50	%		65,706		8.00	%
Worthington		47,690		11.36	%		25,178		6.00	%		35,669		8.50	%		33,571		8.00	%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	1,310,966		10.76	%	$	487,279		4.00	%	N/A		N/A			N/A		N/A
BancFirst		1,081,943		10.43	%		414,882		4.00	%	N/A		N/A			$	518,603		5.00	%
Pegasus		130,792		10.56	%		49,529		4.00	%	N/A		N/A				61,911		5.00	%
Worthington		47,690		8.62	%		22,140		4.00	%	N/A		N/A				27,675		5.00	%
As of December 31, 2022:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,298,329		16.61	%	$	625,387		8.00	%	$	820,821		10.50	%	N/A		N/A
BancFirst		1,092,098		16.68	%		523,932		8.00	%		687,661		10.50	%	$	654,916		10.00	%
Pegasus		117,445		12.91	%		77,802		8.00	%		95,553		10.50	%		91,003		10.00	%
Worthington		47,554		14.09	%		27,006		8.00	%		35,446		10.50	%		33,758		10.00	%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,120,361		14.33	%	$	351,780		4.50	%	$	547,214		7.00	%	N/A		N/A
BancFirst		991,050		15.13	%		294,712		4.50	%		458,441		7.00	%	$	425,695		6.50	%
Pegasus		108,437		11.92	%		40,951		4.50	%		63,702		7.00	%		59,152		6.50	%
Worthington		44,207		13.10	%		15,191		4.50	%		23,631		7.00	%		21,943		6.50	%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,146,361		14.66	%	$	469,041		6.00	%	$	664,474		8.50	%	N/A		N/A
BancFirst		1,011,050		15.44	%		392,949		6.00	%		556,678		8.50	%	$	523,932		8.00	%
Pegasus		108,437		11.92	%		54,602		6.00	%		77,352		8.50	%		72,802		8.00	%
Worthington		44,207		13.10	%		20,255		6.00	%		28,694		8.50	%		27,006		8.00	%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	1,146,361		9.30	%	$	493,191		4.00	%	N/A		N/A			N/A		N/A
BancFirst		1,011,050		9.72	%		416,004		4.00	%	N/A		N/A			$	520,005		5.00	%
Pegasus		108,437		8.00	%		54,238		4.00	%	N/A		N/A				67,798		5.00	%
Worthington		44,207		8.53	%		20,738		4.00	%	N/A		N/A				25,922		5.00	%

As of December 31, 2023, the most recent notifications from the Federal Reserve Bank of Kansas City, the FDIC and the Comptroller of the Currency, categorized BancFirst, Pegasus and Worthington as “well capitalized” under the prompt corrective action provisions. The Common Equity Tier 1 Capital of BancFirst Corporation, BancFirst, Pegasus and Worthington includes common stock and related paid-in capital and retained earnings. In connection with the adoption of the Basel III Capital Rules, the election was made

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to opt-out of the requirement to include most components of accumulated other comprehensive income in Common Equity Tier 1 Capital. Common Equity Tier 1 Capital for BancFirst Corporation, BancFirst, Pegasus and Worthington is reduced by goodwill and other intangible assets, net of associated deferred tax liabilities. The Company’s trust preferred securities have continued to be included in Tier 1 capital, as the Company’s total assets do not exceed $15 billion. The Company's Subordinated Notes have been structured to qualify as Tier 2 capital under bank regulatory guidelines. There are no conditions or events since the most recent notifications to BancFirst Corporation, BancFirst, Pegasus and Worthington of their capital category that management believes would materially change their category under capital requirements existing as of the report date.

(16) NET INCOME PER COMMON SHARE

Basic and diluted net income per common share are calculated as follows:

	Year ended December 31,
	2023		2022		2021
	(Dollars in thousands, except per share data)
(Numerator)
Income available to common stockholders	$	212,465	$	193,100	$	167,630
(Denominator)
Weighted-average shares outstanding for basic earnings per common share		32,919,348		32,778,355		32,716,099
Dilutive effect of stock compensation		575,139		661,141		598,047
Weighted-average shares outstanding for diluted earnings per common share		33,494,487		33,439,496		33,314,146
Basic earnings per share	$	6.45	$	5.89	$	5.12
Diluted earnings per share	$	6.34	$	5.77	$	5.03

The following table shows the number of options and RSU's that were excluded from the computation of diluted net income per common share for each period because they were anti-dilutive for the period:

	Shares
December 31, 2023		280,150
December 31, 2022		155,316
December 31, 2021		189,780

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(17) CONDENSED PARENT COMPANY FINANCIAL STATEMENTS

BALANCE SHEETS

	December 31,
	2023		2022
	(Dollars in thousands)
ASSETS
Cash	$	91,454	$	17,806
Investments in subsidiaries		1,315,124		1,206,246
Goodwill		101,611		101,611
Core deposit premium		10,428		12,009
Dividends receivable		17,091		15,682
Other assets		2,262		1,731
Total assets	$	1,537,970	$	1,355,085
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	$	17,978	$	18,205
Subordinated debt		86,101		86,044
Stockholders’ equity		1,433,891		1,250,836
Total liabilities and stockholders’ equity	$	1,537,970	$	1,355,085

STATEMENTS OF INCOME

	Year Ended December 31,
	2023			2022			2021
	(Dollars in thousands)
OPERATING INCOME
Dividends from subsidiaries	$	137,275		$	93,139		$	54,480
Interest on interest-bearing deposits		1,178			94			41
Other		726			1,338			1,071
Total operating income		139,179			94,571			55,592
OPERATING EXPENSE
Interest		4,122			4,122			3,130
Other		3,206			7,190			3,340
Total operating expense		7,328			11,312			6,470
Income before taxes and equity in undistributed earnings of subsidiaries		131,851			83,259			49,122
Allocated income tax benefit		2,249			5,857			4,191
Income before equity in undistributed earnings of subsidiaries		134,100			89,116			53,313
Equity in undistributed earnings of subsidiaries		81,275			105,817			116,365
Amortization of stock-based compensation arrangements of subsidiaries		(2,910	)		(1,833	)		(2,048	)
Net income	$	212,465		$	193,100		$	167,630

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STATEMENTS OF CASH FLOW

	Year Ended December 31,
	2023			2022			2021
	(Dollars in thousands)
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	212,465		$	193,100		$	167,630
Adjustments to reconcile to net cash provided by operating activities:
Equity in undistributed earnings of subsidiaries		(81,275	)		(105,817	)		(116,365	)
Amortization of stock-based compensation arrangements of subsidiaries		2,910			1,833			2,048
Other, net		(655	)		3,815			5,056
Net cash provided by operating activities		133,445			92,931			58,369
INVESTING ACTIVITIES
Payments for investments in subsidiaries		(6,100	)		(94,967	)		(9,000	)
Other, net		(778	)		(1,352	)		4,429
Net cash used in investing activities		(6,878	)		(96,319	)		(4,571	)
FINANCING ACTIVITIES
Issuance of common stock		2,543			7,649			2,260
Common stock acquired		(1,820	)		—			(11,663	)
Net cash settlement of options		—			—			(5,479	)
Cash dividends paid		(53,642	)		(48,462	)		(45,140	)
Proceeds from the issuance of subordinated notes, net of debt issuance costs		—			—			59,150
Net cash used in financing activities		(52,919	)		(40,813	)		(872	)
Net increase/(decrease) in cash and due from banks		73,648			(44,201	)		52,926
Cash and due from banks at the beginning of the period		17,806			62,007			9,081
Cash and due from banks at the end of the period	$	91,454		$	17,806		$	62,007
SUPPLEMENTAL DISCLOSURE
Cash paid during the period for interest	$	4,122		$	4,122		$	3,130
Cash received during the period for income taxes, net	$	1,746		$	6,667		$	4,411

(18) RELATED PARTY TRANSACTIONS

The Company had, and expects to have in the future, transactions with the Company’s directors and executive officers, companies with which these individuals are associated and certain related individuals. Such transactions were made in the ordinary course of business and included loans, leases and professional services.

Refer to Note (5) for information regarding loan transactions with related parties.

(19) COMMITMENTS AND CONTINGENT LIABILITIES

The Company is a party to financial instruments with off balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include loan commitments and standby letters of credit, which involve elements of credit and interest rate risk to varying degrees. The Company’s exposure to credit loss in the event of nonperformance by the other party to the instrument is represented by the instrument’s contractual amount. To control this credit risk, the Company uses the same underwriting standards as it uses for loans recorded on the consolidated balance sheet. The amounts of financial instruments with off-balance-sheet risk are as follows:

	December 31,
	2023		2022
	(Dollars in thousands)
Loan commitments	$	2,785,673	$	2,627,552
Stand-by letters of credit		84,947		72,237

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Loan commitments are agreements to lend to a customer, as long as there is no violation of any condition established in the contract. Stand-by letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. These instruments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the instruments are expected to expire without being drawn upon, the total amounts do not necessarily represent commitments that will be funded in the future.

The Company is a defendant in legal actions arising from normal business activities. Management believes that all legal actions against the Company are without merit or that the ultimate liability, if any, resulting from them will not materially affect the Company’s consolidated financial statements.

(20) LEASES

Lessee

The Company has operating leases, which primarily consist of office space in buildings, ATM locations, storage facilities, parking lots, equipment and land on which it owns certain buildings.

Rental expense on all operating leases, including those rented on a monthly or temporary basis were as follows (Dollars in thousands):

Year Ending December 31:
2023	$	2,066
2022		1,865
2021		1,560

A right of use lease asset included in accrued interest receivable and other assets on the consolidated balance sheet totaled $5.9 million at December 31, 2023 compared to $5.6 million at December 31, 2022, and a related lease liability included in accrued interest payable and other liabilities on the consolidated balance sheet totaled $5.8 million at December 31, 2023 compared to $5.4 million at December 31, 2022. As of December 31, 2023, our operating leases have a weighted-average remaining lease term of 3.2 years and a weighted-average discount rate of 2.6 percent.

Maturity of Operating Lease Liabilities

The following table presents minimum future commitments by year for the Company’s operating leases. Such commitments are reflected as undiscounted values and are reconciled to the discounted present value recognized on the consolidated balance sheet.

	December 31, 2023
	(Dollars in thousands)
2024	$	2,022
2025		1,653
2026		1,085
2027		731
2028		409
Thereafter		312
Total lease payments		6,212
Less imputed interest		(375	)
Operating lease liability	$	5,837

Lessor

The Company is a lessor of operating leases, which primarily consist of office space in buildings and parking lots. These assets are classified on the consolidated balance sheet as premises and equipment. The Company had operating lease revenue of $5.9 million,

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$5.4 million and $4.9 million for the years ended December 31, 2023, 2022 and 2021, respectively. Lease revenue is included in occupancy, net on the consolidated statements of comprehensive income.

Future Minimum Lease Payments to be received

The Company does not have operating leases that extend beyond 2031. The following table presents the scheduled minimum future contractual rent to be received under the remaining non-cancelable term of the operating leases:

	December 31, 2023
	(Dollars in thousands)
2024	$	3,555
2025		2,796
2026		2,535
2027		2,181
2028		1,951
2029-2031		4,269
Total future minimum lease payments	$	17,287

(21) FAIR VALUE MEASUREMENTS

Accounting standards define fair value as the price that would be received to sell an asset or the price paid to transfer a liability in the principal or most advantageous market available to the entity in an orderly transaction between market participants on the measurement date.

FASB Accounting Standards Codification (“ASC”) Topic 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

•Level 1 Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets.

•Level 2 Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset and liability, either directly or indirectly, for substantially the full term of the financial instrument.

•Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose values are determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. This category includes certain collaterally dependent loans, impaired loans, repossessed assets, other real estate owned, goodwill and other intangible assets.

Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis

A description of the valuation methodologies and key inputs used to measure financial assets and financial liabilities at fair value on a recurring basis, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. These valuation methodologies were applied to the following categories of the Company’s financial assets and financial liabilities.

Debt Securities Available for Sale

Debt securities classified as available for sale are reported at fair value. U.S. Treasuries are valued using Level 1 inputs. Other debt securities available for sale including U.S. federal agencies, registered mortgage backed debt securities and state and political subdivisions are valued using prices from an independent pricing service utilizing Level 2 data. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things. The Company also invests in private label mortgage backed debt securities for which observable information is not readily available. These debt securities are reported at fair value utilizing Level 3 inputs. For these debt securities, management determines the fair value based on replacement cost, the income approach or information provided by outside consultants or lead investors. Discount rates are primarily based on reference to interest rate spreads on comparable debt securities of similar duration and credit rating as determined by the

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nationally recognized rating agencies adjusted for a lack of trading volume. Significant unobservable inputs are developed by investment securities professionals involved in the active trading of similar debt securities.

The Company reviews the prices for Level 1 and Level 2 debt securities supplied by the independent pricing service for reasonableness and to ensure such prices are aligned with traditional pricing matrices. In general, the Company does not purchase investment portfolio debt securities that are esoteric or that have complicated structures. The Company’s portfolio primarily consists of traditional investments including U.S. Treasury obligations, federal agency mortgage pass-through debt securities, general obligation municipal bonds and a small amount of municipal revenue bonds. Pricing for such instruments is fairly generic and is easily obtained. For in-state bond issues that have relatively low issue sizes and liquidity, the Company utilizes the same parameters for pricing mentioned in the preceding paragraph adjusted for the specific issue. Periodically, the Company will validate prices supplied by the independent pricing service by comparison to prices obtained from third party sources.

Derivatives

Derivatives are reported at fair value utilizing Level 2 inputs. The Company obtains dealer and market quotations to value its oil and gas swaps and options. The Company utilizes dealer quotes and observable market data inputs to substantiate internal valuation models.

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of the periods presented, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
	(Dollars in thousands)
December 31, 2023
Debt securities available for sale:
U.S. Treasury	$	1,498,045	$	—	$	—	$	1,498,045
U.S. federal agencies		—		11,770		—		11,770
Mortgage-backed securities		—		14,795		—		14,795
States and political subdivisions		—		9,830		180		10,010
Asset backed securities		—		12,512		—		12,512
Other debt securities		—		6,773		—		6,773
Derivative assets		—		41,099		—		41,099
Derivative liabilities		—		39,176		—		39,176
December 31, 2022
Debt securities available for sale:
U.S. Treasury	$	1,477,864	$	—	$	—	$	1,477,864
U.S. federal agencies		—		15,222		—		15,222
Mortgage-backed securities		—		16,586		—		16,586
States and political subdivisions		—		7,680		454		8,134
Asset backed securities		—		13,010		—		13,010
Other debt securities		—		7,405		—		7,405
Derivative assets		—		20,745		—		20,745
Derivative liabilities		—		19,683		—		19,683

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The changes in Level 3 assets measured at estimated fair value on a recurring basis during the periods presented were as follows:

	Twelve Months Ended December 31,
	2023			2022
	(Dollars in thousands)
Balance at the beginning of the year	$	454		$	320
Transfers to level 2		(244	)		—
Purchases		—			255
Settlements		(30	)		(110	)
Total unrealized losses		—			(11	)
Balance at the end of the period	$	180		$	454

The Company’s policy is to recognize transfers in and transfers out of Levels 1, 2 and 3 as of the end of the reporting period. During the year ended December 31, 2023, the Company transferred debt securities from Level 3 to Level 2 due to a review of the pricing models that determined some state and political subdivision securities to be Level 2. During the year ended December 31, 2022, the Company did not transfer any debt securities.

Financial Assets and Financial Liabilities Measured at Fair Value on a Nonrecurring Basis

Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis; that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). These financial assets and financial liabilities are reported at fair value utilizing Level 3 inputs.

The Company invests in equity securities without readily determinable fair values and utilizes Level 3 inputs. These equity securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income.

Collateral dependent loans are reported at the fair value of the underlying collateral if repayment is dependent on liquidation of the collateral. When the Company determines that foreclosure is probable or when the borrower is experiencing financial difficulty at the reporting date and repayment is expected to be provided substantially through the operation or sale of the collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. In no case does the fair value of a collateral dependent loan exceed the fair value of the underlying collateral. The collateral dependent loans are adjusted to fair value through a specific allocation of the allowance for credit losses or a direct charge-down of the loan.

Repossessed assets, upon initial recognition, are measured and adjusted to fair value through a charge-off to the allowance for possible credit losses based upon the fair value of the repossessed asset.

Other real estate owned is revalued at fair value subsequent to initial recognition, with any losses recognized in net expense from other real estate owned.

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The following table summarizes assets measured at fair value on a nonrecurring basis during the period presented. These nonrecurring fair values do not represent all assets, only those assets that have been adjusted during the reporting period:

	Total Fair Value Level 3
	(Dollars in thousands)
As of and for the Year-to-date Period Ended December 31, 2023
Equity securities	$	13,144
Collateral dependent loans		1,894
Repossessed assets		474
Other real estate owned		31,773
As of and for the Year-to-date Period Ended December 31, 2022
Equity securities	$	15,512
Collateral dependent loans		1,618
Repossessed assets		180
Other real estate owned		34,999

Estimated Fair Value of Financial Instruments

The Company is required under current authoritative accounting guidance to disclose the estimated fair value of their financial instruments that are not recorded at fair value. For the Company, as for most financial institutions, substantially all of its assets and liabilities are considered financial instruments. A financial instrument is defined as cash, evidence of an ownership interest in an entity or a contract that creates a contractual obligation or right to deliver or receive cash or another financial instrument from a second entity. The following methods and assumptions were used to estimate the fair value of each class of financial instruments:

Cash and Cash Equivalents Include: Cash and Due from Banks and Interest-Bearing Deposits with Banks

The carrying amount of these short-term instruments is a reasonable estimate of fair value.

Federal Funds Sold

The carrying amount of these short-term instruments is a reasonable estimate of fair value.

Debt Securities Held for Investment

For debt securities held for investment, which are generally traded in secondary markets, fair values are based on quoted market prices or dealer quotes, if available. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities making adjustments for credit or liquidity if applicable.

Loans Held for Sale

The Company originates mortgage loans to be sold. At the time of origination, the acquiring bank has already been determined and the terms of the loan, including interest rate, have already been set by the acquiring bank allowing the Company to originate the loan at fair value. Mortgage loans are generally sold within 30 days of origination. Loans held for sale are valued using Level 2 inputs. Gains or losses recognized upon the sale of the loans are determined on a specific identification basis.

Loans Held for Investment

To determine the fair value of loans held for investment, the Company uses an exit price calculation, which takes into account factors such as liquidity, credit and the nonperformance risk of loans. For certain homogeneous categories of loans, such as some residential mortgages, fair values are estimated using the quoted market prices for securities backed by similar loans, adjusted for differences in loan characteristics. The fair values of other types of loans are estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities.

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Deposits

The fair values of transaction and savings accounts are the amounts payable on demand at the reporting date. The fair values of fixed-maturity certificates of deposit are estimated using the rates currently offered for deposits of similar remaining maturities.

Short-term Borrowings

The amounts payable on these short-term instruments are reasonable estimates of fair value.

Subordinated Debt

The fair values of subordinated debt are estimated using the rates that would be charged for subordinated debt of similar remaining maturities.

Loan Commitments and Letters of Credit

The fair values of commitments are estimated using the fees currently charged to enter into similar agreements, taking into account the terms of the agreements. The fair values of letters of credit are based on fees currently charged for similar agreements.

The estimated fair values of the Company’s financial instruments that are reported at amortized cost in the Company’s consolidated balance sheets, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value, are as follows:

	December 31,
	2023				2022
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(Dollars in thousands)
FINANCIAL ASSETS
Level 2 inputs:
Cash and cash equivalents	$	2,397,463	$	2,397,463	$	3,168,910	$	3,168,910
Federal funds sold		1,316		1,316		2,850		2,850
Debt securities held for investment		5		5		13		13
Loans held for sale		3,489		3,489		6,232		6,232
Level 3 inputs:
Debt securities held for investment		1,185		1,185		2,370		2,370
Loans held for investment, net of allowance for credit losses		7,559,845		7,356,768		6,850,835		6,563,755
FINANCIAL LIABILITIES
Level 2 inputs:
Deposits		10,700,122		10,413,348		10,974,228		10,614,840
Short-term borrowings		3,351		3,351		300		300
Subordinated debt		86,101		79,271		86,044		82,385
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS
Loan commitments				4,875				4,598
Letters of credit				637				542

Non-financial Assets and Non-financial Liabilities Measured at Fair Value

The Company has no non-financial assets or non-financial liabilities measured at fair value on a recurring basis. Certain non-financial assets and non-financial liabilities measured at fair value on a nonrecurring basis include intangible assets and other non-financial long-lived assets measured at fair value and adjusted for impairment. These items are evaluated at least annually for impairment, of which there was none as of December 31, 2023 or 2022. The overall levels of non-financial assets and non-financial liabilities measured at fair value on a nonrecurring basis were not considered to be significant to the Company at December 31, 2023 or 2022.

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(22) DERIVATIVE FINANCIAL INSTRUMENTS

The Company enters into oil and gas swaps and options contracts to accommodate the business needs of its customers. Upon the origination of an oil or gas swap or option contract with a customer, to mitigate the exposure to fluctuations in oil and gas prices, the Company simultaneously enters into an offsetting contract with a counterparty. These derivatives are not designated as hedged instruments and are recorded on the Company's consolidated balance sheet at fair value and are included in other assets. The Company's derivative financial instruments require a daily margin to be posted, which fluctuates with oil and gas prices. At December 31, 2023, the Company had a margin liability in other liabilities in the amount of $15.5 million. At December 31, 2022, the Company had a margin asset included in other assets in the amount of $6.6 million.

The Company utilizes dealer quotations and observable market data inputs to substantiate internal valuation models. The notional amounts and estimated fair values of oil and gas derivative positions outstanding are presented in the following table:

		December 31,
		2023						2022
Oil and Natural Gas Swaps and Options	Notional Units	Notional Amount			Estimated Fair Value			Notional Amount			Estimated Fair Value
		(Notional amounts and dollars in thousands)
Oil
Derivative assets	Barrels		3,896		$	20,567			2,698		$	8,868
Derivative liabilities	Barrels		(3,896	)		(19,512	)		(2,698	)		(8,259	)
Gas/Natural Gas Liquids
Derivative assets	MMBTUs/Gallons		46,140			20,532			25,059			11,877
Derivative liabilities	MMBTUs/Gallons		(46,140	)		(19,664	)		(25,059	)		(11,424	)
Total Fair Value	Included in
Derivative assets	Other assets					41,099						20,745
Derivative liabilities	Other liabilities					(39,176	)					(19,683	)

The following table is a summary of the Company’s recognized income related to the activity, which was included in other noninterest income:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Derivative income	$	701	$	416	$	266

The Company’s credit exposure on oil and gas swaps and options varies based on the current market prices of oil and natural gas. Other than credit risk, changes in the fair value of customer positions will be offset by equal and opposite changes in the counterparty positions. The net positive fair value of the contracts represents the profit derived from the activity and is unaffected by market price movements. The Company’s share of total profit is approximately 35%.

Customer credit exposure is managed by strict position limits and is primarily offset by first liens on production while the remainder is offset by cash. Counterparty credit exposure is managed by selecting highly rated counterparties (rated A- or better by Standard and Poor’s) and monitoring market information.

The following table is a summary of the Company’s net credit exposure relating to oil and gas swaps and options with bank counterparties:

	December 31,
	2023		2022
	(Dollars in thousands)
Credit exposure	$	39,527	$	6,560

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Balance Sheet Offsetting

Derivatives may be eligible for offset in the consolidated balance sheet and/or subject to master netting arrangements. The Company’s derivative transactions with upstream financial institution counterparties and bank customers are generally executed under International Swaps and Derivative Association (“ISDA”) master agreements, which include “right of set-off” provisions. In such cases there is generally a legally enforceable right to offset recognized amounts and there may be an intention to settle such amounts on a net basis. Nonetheless, the Company does not generally offset such financial instruments for financial reporting purposes.

(23) SEGMENT INFORMATION

The Company evaluates its performance with an internal profitability measurement system that measures the profitability of its business units on a pre-tax basis. The six principal business units are BancFirst metropolitan banks, BancFirst community banks, Pegasus, Worthington, other financial services and executive, operations and support. BancFirst metropolitan banks, BancFirst community banks, Pegasus and Worthington offer traditional banking products such as commercial and retail lending and a full line of deposit accounts. BancFirst metropolitan banks consist of banking locations in the metropolitan Oklahoma City and Tulsa areas. BancFirst community banks consist of banking locations in communities in Oklahoma outside the Oklahoma City and Tulsa metropolitan areas. Pegasus consists of banking locations in the Dallas metropolitan area. Worthington consists of banking locations in the Dallas-Fort Worth-Arlington metropolitan area. Other financial services are specialty product business units including guaranteed small business lending, residential mortgage lending, trust services, securities brokerage, electronic banking and insurance. The executive, operations and support groups represent executive management, operational support and corporate functions that are not allocated to the other business units.

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The results of operations and selected financial information for the six business units are as follows:

	BancFirst Metropolitan Banks			BancFirst Community Banks			Pegasus			Worthington			Other Financial Services			Executive, Operations & Support			Eliminations			Consolidated
	(Dollars in thousands)
December 31, 2023
Net interest income	$	120,226		$	229,196		$	51,277		$	17,395		$	4,164		$	2,198		$	—		$	424,456
Provision for/(benefit    from) credit losses		4,836			2,331			(328	)		564			79			(24	)		—			7,458
Noninterest income		24,793			70,824			1,646			1,170			52,711			250,968			(216,704	)		185,408
Depreciation and    amortization		2,347			10,514			804			496			481			7,547			—			22,189
Other expenses		46,329			123,554			20,084			13,636			37,495			70,293			(1,122	)		310,269
Income before taxes	$	91,507		$	163,621		$	32,363		$	3,869		$	18,820		$	175,350		$	(215,582	)	$	269,948
Total assets	$	3,598,888		$	7,012,905		$	1,280,618		$	600,364		$	121,601		$	1,307,714		$	(1,550,048	)	$	12,372,042
Capital expenditures	$	2,752		$	5,156		$	528		$	5,497		$	108		$	8,463		$	—		$	22,504
December 31, 2022
Net interest income	$	97,728		$	208,728		$	46,439		$	14,919		$	8,065		$	(2,226	)	$	20		$	373,673
(Benefit from)/provision    for credit losses		2,186			2,451			2,840			(43	)		(161	)		2,803			—			10,076
Noninterest income		32,756			72,385			1,026			1,034			50,643			223,844			(197,941	)		183,747
Depreciation and    amortization		2,821			10,453			789			398			519			7,068			—			22,048
Other expenses		42,583			117,248			19,013			9,280			36,271			64,325			(856	)		287,864
Income before taxes	$	82,894		$	150,961		$	24,823		$	6,318		$	22,079		$	147,422		$	(197,065	)	$	237,432
Total assets	$	3,412,369		$	6,886,066		$	1,404,033		$	541,002		$	171,679		$	1,473,443		$	(1,500,729	)	$	12,387,863
Capital expenditures	$	2,026		$	10,146		$	311		$	262		$	67		$	6,973		$	—		$	19,785
December 31, 2021
Net interest income	$	77,840		$	180,925		$	24,222		$	—		$	35,244		$	(3,295	)	$	721		$	315,657
Provision for credit losses		(5,474	)		(4,694	)		1,395			—			109			(26	)		—			(8,690	)
Noninterest income		23,257			65,600			1,448			—			47,124			203,005			(170,402	)		170,032
Depreciation and    amortization		2,593			10,483			782			—			557			5,626			—			20,041
Other expenses		39,356			110,574			15,317			—			60,435			41,199			(941	)		265,940
Income before taxes	$	64,622		$	130,162		$	8,176		$	—		$	21,267		$	152,911		$	(168,740	)	$	208,398
Total assets	$	2,627,874		$	5,821,220		$	1,045,699		$	—		$	71,694		$	1,201,974		$	(1,362,849	)	$	9,405,612
Capital expenditures	$	1,612		$	7,390		$	363		$	—		$	400		$	17,486		$	—		$	27,251

The financial information for each business unit is presented on the basis used internally by management to evaluate performance and allocate resources. The Company utilizes a transfer pricing system to allocate the benefit or cost of funds provided or used by the various business units. Certain services provided by the support group to other business units, such as item processing, are allocated at rates approximating the cost of providing the services. Eliminations are adjustments to consolidate the business units and companies. Capital expenditures are generally charged to the business unit using the asset.

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Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

There were no disagreements with accountants regarding accounting and financial disclosure matters during the year ended December 31, 2023.

Item 9A. Controls and Procedures.

Pursuant to Rule 13a-15 of the Securities Exchange Act of 1934 (the “Exchange Act”), the Company’s Chief Executive Officer, Chief Financial Officer and its Disclosure Committee, which includes the Company’s Executive Chairman, Chief Risk Officer, Chief Internal Auditor, Chief Asset Quality Officer, Controller, General Counsel and Director of Financial Reporting, have evaluated, as of the last day of the period covered by this Annual Report on Form 10-K, the effectiveness of the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act). Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the disclosure controls and procedures of the Company were effective as of the end of the period covered by this Annual Report on Form 10-K.

No changes were made to the Company’s internal control over financial reporting (as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934) during the last fiscal quarter of 2023 that has materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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Management’s Report On Internal Control Over Financial Reporting

Management is responsible for establishing and maintaining internal control over financial reporting and for assessing the effectiveness of internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Management has assessed the effectiveness of the Company’s internal control over financial reporting based on the criteria established in “Internal Control—Integrated Framework (2013 edition),” issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”). Based on that assessment and criteria, management has determined that the Company has maintained effective internal control over financial reporting as of December 31, 2023.

FORVIS LLP, an independent registered public accounting firm, has audited the effectiveness of the Company’s internal control over financial reporting as of December 31, 2023 and has issued an unqualified report thereon.

BancFirst Corporation

Oklahoma City, Oklahoma

February 27, 2024

/s/ David Harlow

David Harlow

President and Chief Executive Officer

(Principal Executive Officer)

/s/ Kevin Lawrence

Kevin Lawrence

Executive Vice President,

Chief Financial Officer

(Principal Financial Officer)

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Report of Independent Registered Public Accounting Firm

Shareholders, Board of Directors and Audit Committee

BancFirst Corporation

Oklahoma City, Oklahoma

Opinion on the Internal Control over Financial Reporting

We have audited BancFirst Corporation’s (the Company) internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control – Integrated Framework (2013), issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control – Integrated Framework: (2013) issued by COSO.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements of the Company as of December 31, 2023 and 2022 and for each of the three years in the period ended December 31, 2023, and our report dated February 27, 2024, expressed an unqualified opinion on those consolidated financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit.

We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definitions and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of reliable financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that 1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; 2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and 3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions or that the degree of compliance with the policies or procedures may deteriorate.

/s/ FORVIS, LLP

Oklahoma City, Oklahoma

February 27, 2024

106

Item 9B. Other Information.

During the fiscal quarter ended December 31, 2023, none of our directors or officers (as defined in Rule 16a-1(f) under the Exchange Act) informed us of the adoption, modification or termination of a Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement (in each case, as defined in Item 408(a) of Regulation S-K).

There is no information required to be disclosed in a report on Form 8-K during the fourth quarter of the year that was not reported.

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections.

Not applicable.

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

The information required by this Item is incorporated herein by reference to our Proxy Statement (Schedule 14A) for our 2024 Annual Meeting of Shareholders to be filed with the SEC within 120 days of our fiscal year-end.

Item 11. Executive Compensation.

The information required by this Item is incorporated herein by reference to our Proxy Statement (Schedule 14A) for our 2024 Annual Meeting of Shareholders to be filed with the SEC within 120 days of our fiscal year-end.

Item 12. Security Ownership of Certain Beneficial Owners and Management.

Certain information regarding securities authorized for issuance under our equity compensation plans is included under the section captioned “Equity Compensation Plan Information” in Part II, Item 5, elsewhere in this Annual Report on Form 10-K. Other information required by this Item is incorporated herein by reference to our Proxy Statement (Schedule 14A) for our 2024 Annual Meeting of Shareholders to be filed with the SEC within 120 days of our fiscal year-end.

Item 13. Certain Relationships and Related Transactions and Director Independence.

The information required by this Item is incorporated herein by reference to our Proxy Statement (Schedule 14A) for our 2024 Annual Meeting of Shareholders to be filed with the SEC within 120 days of our fiscal year-end.

Item 14. Principal Accountant Fees and Services.

The information required by this Item is incorporated herein by reference to our Proxy Statement (Schedule 14A) for our 2024 Annual Meeting of Shareholders to be filed with the SEC within 120 days of our fiscal year-end. Our independent registered public accounting firm is FORVIS, LLP Oklahoma City, OK PCAOB ID: 686.

107

PART IV

Item 15. Exhibits and Financial Statement Schedules.

(a)For the financial statements of BancFirst Corporation, reference is made to Part II, Item 8, of this Annual Report on Form 10-K.

(1)Financial Statements:

Report of Independent Registered Public Accounting Firm

Consolidated Balance Sheets at December 31, 2023 and 2022

Consolidated Statements of Comprehensive Income for the three years ended December 31, 2023, 2022 and 2021

Consolidated Statements of Stockholders’ Equity for the three years ended December 31, 2023, 2022 and 2021

Consolidated Statements of Cash Flow for the three years ended December 31, 2023, 2022 and 2021

Notes to Consolidated Financial Statements

(2)All other schedules are omitted because they are not applicable or the required information is shown in the financial statements or notes thereto.

(3)The following Exhibits are filed with this Report or are incorporated by reference as set forth below:

108

Index to Exhibits
Exhibit Number	Exhibit
2.1	Share Exchange Agreement by and between BancFirst Corporation and Pegasus Bank dated April 23, 2019 (filed as Exhibit 2.1 to the Company’s Current Report on Form 8-K/A dated April 25, 2019 and incorporated herein by reference).
3.1	Amended and Restated By-Laws of BancFirst Corporation (filed as Exhibit 3.1 to the Company’s Quarterly Report on Form 10-Q for the Quarter Ended March 31, 2023 and incorporated herein by reference).
3.2	Restated Certificate of Incorporation of BancFirst Corporation dated August 5, 2021 (filed as exhibit 3.2 to the Company's Quarterly Report on Form 10-Q for the Quarter Ended June 30, 2021 and incorporated herein by reference).
4.1	Instruments defining the rights of securities holders (see Exhibits 3.1 and 3.2 above).
4.2	Description of Registrant’s Securities (filed as Exhibit 4.2 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2019 and incorporated herein by reference).
4.3	Form of Amended and Restated Trust Agreement relating to the 7.20% Cumulative Trust Preferred Securities of BFC Capital Trust II (filed as Exhibit 4.5 to the Company’s registration statement on Form S-3/A, File No. 333-112488 dated February 23, 2004 and incorporated herein by reference).
4.4	Form of 7.20% Cumulative Trust Preferred Security Certificate for BFC Capital Trust II (filed as Exhibit D to Exhibit 4.5 to the Company’s registration statement on Form S-3/A, File No. 333-112488 dated February 23, 2004, and incorporated herein by reference).
4.5	Form of Indenture relating to the 7.20% Junior Subordinated Deferrable Interest Debentures of BancFirst Corporation issued to BFC Capital Trust II (filed as Exhibit 4.1 to the Company’s registration statement on Form S-3, File No. 333-112488 dated February 4, 2004 and incorporated herein by reference).
4.6	Form of Certificate of 7.20% Junior Subordinated Deferrable Interest Debenture of BancFirst Corporation (filed as Exhibit 4.2 on Form S-3 to the Company’s registration statement, File No. 333-112488 dated February 4, 2004 and incorporated herein by reference).
4.7	Form of Guarantee of BancFirst Corporation relating to the 7.20% Cumulative Trust Preferred Securities of BFC Capital Trust II (filed as Exhibit 4.7 to the Company’s registration statement on Form S-3/A, File No. 333-112488 dated February 23, 2004 and incorporated herein by reference).
10.1	Amended and Restated BancFirst Corporation Directors’ Deferred Stock Compensation Plan (filed as exhibit 10.12 to the Company's Quarterly Report on Form 10-Q for the Quarter Ended June 30, 2021 and incorporated herein by reference).
10.2	Subordinated Note Purchase Agreement (filed as exhibit 10.1 to the Company's Current Report on Form 8-K dated June 17, 2021 and incorporated herein by reference).
10.3	Amended and Restated BancFirst Corporation Stock Option Plan (filed as exhibit 10.9 to the Company's Quarterly Report on Form 10-Q for the Quarter Ended June 30, 2022 and incorporated herein by reference).
10.4	Amended and Restated BancFirst Corporation Non-Employee Directors’ Stock Option Plan (filed as exhibit 10.10 to the Company's Quarterly Report on Form 10-Q for the Quarter Ended June 30, 2022 and incorporated herein by reference).
10.5	BancFirst Corporation Employee Stock Ownership Plan Amendment to Implement Secure Act and Other Law Changes. (filed as exhibit 10.11 to the Company's Quarterly Report on Form 10-Q for the Quarter Ended June 30, 2022, and incorporated herein by reference).
10.6	Adoption Agreement for McAfee & Taft Professional Corporation Non-Standardized Employee Stock Ownership Pre-Approved Plan. (filed as exhibit 10.12 to the Company's Quarterly Report on Form 10-Q for the Quarter Ended June 30 2022 and incorporated herein by reference).
10.7	BancFirst Corporation Thrift Plan Amended and Restated Adoption Agreement. (filed as exhibit 10.12 to the Company's Quarterly Report on Form 10-Q for the Quarter Ended September 30, 2022 and incorporated herein by reference).

109

10.8	2023 First Amendment to the BancFirst Corporation Thrift Plan (filed as exhibit 10.14 to the Company's Annual Report on Form 10-K for the year ended December 31, 2022 and incorporated herein by reference).
10.9	2023 First Amendment to the BancFirst Corporation Employee Stock Ownership Plan (filed as exhibit 10.15 to the Company's Annual Report on Form 10-K for the year ended December 31 2022 and incorporated herein by reference).
10.10	BancFirst Corporation 2023 Restricted Stock Unit Plan (filed as Exhibit 10.1 to the Company's Current Report on Form 8-K dated May 25, 2023 and incorporated herein by reference).
14*	BancFirst Corporation Corporate Code of Conduct.
21.1*	Subsidiaries of the Registrant.
23.1*	Consent of Independent Registered Public Accounting Firm.
31.1*	Chief Executive Officer's Certification pursuant to Rule 13a-14(a) or Rule 15d-14(a).
31.2*	Chief Financial Officer's Certification pursuant to Rule 13a-14(a) or Rule 15d-14(a).
32*	CEO’s and CFO’s Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
97*	Recovery of Erroneously Awarded Executive Compensation.
101.SCH	Inline XBRL Taxonomy Extension Schema with Embedded Linkbase Documents.
101.INS	Inline XBRL Instance Document.
104	Cover page Interactive Data File (formatted as Inline XBRL and included in Exhibit 101).

* Filed herewith.

110

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

February 27, 2024	BANCFIRST CORPORATION
	/s/ David Harlow
	David Harlow
	President and Chief Executive Officer (Principal Executive Officer)

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities indicated on February 27, 2024.

/s/ David E. Rainbolt	/s/ David R. Harlow
David E. Rainbolt	David R. Harlow
Executive Chairman	President and Chief Executive Officer (Principal Executive Officer)
/s/ F. Ford Drummond	/s/ Joseph Ford
F. Ford Drummond	Joseph Ford
Director	Director
/s/ Joe R. Goyne
Joe R. Goyne	William O. Johnstone
Director	Vice Chairman of the Board
/s/ Mautra Staley Jones
Mautra Staley Jones	Bill G. Lance
Director	Director
	/s/ William Scott Martin
Dave R. Lopez	William Scott Martin
Director	Director
/s/ Tom H. McCasland, III	/s/ Leslie Rainbolt
Tom H. McCasland, III	Leslie Rainbolt
Director	Director
/s/ Robin Roberson	/s/ Darryl W. Schmidt
Robin Roberson	Darryl W. Schmidt
Director	Chief Executive Officer, BancFirst and Director
/s/ Natalie Shirley	/s/ Michael K. Wallace
Natalie Shirley	Michael K. Wallace
Director	Director
/s/ Gregory G. Wedel	/s/ G. Rainey Williams, Jr
Gregory G. Wedel	G. Rainey Williams, Jr
Director	Director
/s/ Kevin Lawrence	/s/ Randy Foraker
Kevin Lawrence	Randy Foraker
Executive Vice President and Chief Financial Officer (Principal Financial Officer)	Executive Vice President and Chief Risk Officer (Principal Accounting Officer)

111

PERFORMANCE GRAPH

The performance graph below compares the cumulative total shareholder return on the Company’s Common Stock to the cumulative total return of the NASDAQ Stock Market (U.S. Companies) Index and the NASDAQ Bank Stock Index. The graph assumes an investment on December 31, 2018 of $100 in the Company’s Common Stock and in each index, and that any dividends were reinvested. The performance graph represents past performance and should not be considered an indication of future performance.

 

	As of December 31,
	2018		2019		2020		2021		2022		2023
BancFirst Corporation (BANF)	$	100.00	$	127.91	$	124.13	$	152.39	$	193.72	$	217.80
NASDAQ Bank Stocks (U.S.)		100.00		124.38		115.04		164.41		137.65		132.92
NASDAQ Composite Stock Market (U.S)		100.00		136.73		198.33		242.38		163.58		236.70

112

EX-14

Exhibit 14

BANCFIRST CORPORATION CORPORATE CODE OF CONDUCT

(Revised June 28, 2018)

Purpose

The purpose of this Corporate Code of Conduct is to set forth the Company’s standards regarding the ethical and legal behavior expected of its directors, officers and employees.

The ethical and legal conduct of our business is critical to achieving our Company’s mission. Our corporate ethics are based on a set of core values:

Asset Quality	Community Leadership
Customer Care	Employee Development
Integrity	Profitability

We expect our directors, officers and employees to conduct themselves with integrity both on and off the job. It is essential that all of our business activities be carried out in an atmosphere of mutual respect and courtesy, and in an ethical manner. The manner in which we conduct ourselves away from work also influences the public’s trust and opinion of the Company.

This Corporate Code of Conduct applies to all directors, officers and employees of the Company. The Company requires that all directors and executive officers sign the form attached to this Code acknowledging their understanding of the Code and agreeing to comply with it at all times.

Conflicts of Interest

The Company’s Conflicts of Interest policy is a part of this Corporate Code of Conduct. All directors, officers and employees are expected to be familiar with the policy and comply with its requirements.

Corporate Opportunities

Directors, officers and employees are prohibited from (a) taking for themselves personally opportunities that are properly within the scope of the Company's activities, (b) using corporate property, information or position for personal gain, and (c) competing with the Company. Directors, officers and employees owe a duty to the Company to advance its legitimate business interests to the best of their abilities.

No director, officer, employee or an immediate family member, who is in a position to influence or control decisions affecting business transaction or relationships of the Company shall have any obligation to, have any material interest in, or receive any benefit from, any outside person, company or vendor which either directly or indirectly competes with or does business with the Company. If an obligation or material interest exists or develops, the director, officer or employee must make full disclosure of the obligation or material interest and obtain the approval of the appropriate authority.

Confidential Nature of Bank and Customer Affairs

The Company’s Confidential Nature of Bank and Customer Affairs policy is a part of this Corporate Code of Conduct. All directors, officers and employees are expected to be familiar with the policy and comply with its requirements.

Inside Information/Insider Trading

BancFirst Corporation is a registered public company and is subject to laws, rules and regulations regarding the use of non-public inside information and insider trading. In the course of performing their duties directors, officers and employees may receive information about the Company or its customers which, if known to the public, might affect the decision of a reasonable investor to buy, sell, or hold securities of the Company or that customer’s business. Directors, officers and employees are prohibited from acting upon material inside information prior to public disclosure through the purchase or sale of such securities for their own accounts or for fiduciary or agency accounts, and from divulging such information to others except as required by Company business. All directors, officers and employees will promptly report suspected abuse of inside information to the Executive Chairman or Chief Executive Officer, or through the Reporting Hotline as described below.

All directors, officers and employees are prohibited from engaging in “short-swing” trading of securities issued by the Company by purchasing and selling, or selling and repurchasing such securities within a period of less than six months.

Illegal Payments, Bribes, Kickbacks

Directors, officers and employees shall not authorize or make any improper payment for any form of bribery, payoff, illegal contribution, or other payment of a questionable nature to individuals, businesses or government entities. Under no circumstances should the purchase or sale of products and/or services result in any Company director, officer or employee or an immediate family member receiving any form of kickback, rebate or gratuity. If you are approached by anyone to make or receive a questionable payment, immediately contact the appropriate authority.

Foreign Corrupt Practices Act (“FCPA”)

The Company and the law prohibit giving and/or offering money or anything of value to a foreign governmental official, agency, political party, party official or candidate under any circumstances which appears that such items were offered or given to induce the recipient to benefit the Company's business in their country. The FCPA, as well as Company policy, prohibits bribing a governmental official or any other form of commercial bribery. If you are approached by anyone to make a questionable payment, immediately contact the appropriate authority.

Public Reporting and Disclosure

All directors, officers and employees of the Company should ensure that all information contained in reports and documents that the Company files with the banking regulatory agencies, the Securities and Exchange Commission, or other regulatory agencies, and/or contained in other public communications made by the Company is complete, accurate, timely, and in accordance with applicable requirements. In the event that a director, officer or employee has reason to believe that any such information does not meet these standards, then he or she should contact the Executive Chairman or the Chairman of the Audit Committee, or file a report through the Reporting Hotline as described below.

Books and Records

Laws, rules and regulations require, and it is the Company's policy, that all business records (including customer records, transaction records, invoices, statements, tax records, payroll records, time cards, expense reports, benefit plan information, and documentation supporting financial and other reports) be prepared accurately, reliably, and in a timely manner. It is very important that no director, officer or employee create or participate in the creation of (or falsification or alteration of) any Company records which are intended to mislead anyone or conceal anything improper. Company books and records should be maintained in confidence, be safeguarded from loss and destruction, and be under effective internal controls. Directors, officers and employees should always be honest and straightforward when dealing with internal or outside auditors with respect to the Company's transactions, records, accounts, and financial statements.

Appropriate Authority for Disclosure/Waiver

If any director, officer or employee becomes aware of a possible violation of this Code, he or she should report such possible violation immediately to any director or the Executive Chairman, Chief Executive Officer, or Director of Human Resources, or through the Reporting Hotline. Only the Board of Directors may grant waivers or exceptions to this Code for directors or executive officers.

Reporting Hotline

The Company provides an anonymous Internet and telephone based reporting tool that assists management and employees to work together to address fraud, abuse, misconduct, and other violations in the workplace. Instructions to file a report can be found in the Human Resources folder of the Document Library on HelpNet.

Every effort will be made to protect the confidentiality of those furnishing information. The Company will not tolerate retaliation in any form against any person for complaints or reports made in good faith.

Any intentional violation of this Code by directors, officers or employees will lead to appropriate action, up to and including termination of the violator's position and/or employment.

BANCFIRST CORPORATION CORPORATE CODE OF CONDUCT

ACKNOWLEDGEMENT

I understand that BancFirst Corporation and its subsidiaries (the "Company") have adopted a Corporate Code of Conduct that requires all directors, officers and employees conduct the business affairs of the Company and their personal affairs ethically and in compliance with both the letter and spirit of the law. I have read, understand and approve the Corporate Code of Conduct and agree to act consistently with it at all times. I have no knowledge or information of any unreported possible violations of the Code and will report them as required if such possible violations come to my attention.

Signature

Print Name

Date

EX-21.1

Exhibit 21.1

Subsidiaries of BancFirst Corporation

Subsidiary Name	State of Incorporation	Percentage of Ownership
BancFirst	Oklahoma	100.00%
Pegasus Bank	Texas	100.00%
BFC Capital Trust II	Delaware	100.00%
Council Oak Partners, LLC	Oklahoma	100.00%
BancFirst Insurance Services, Inc.	Oklahoma	100.00%
Worthington Bank	Texas	100.00%

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Audit Committee, Board of Directors, and Stockholders

BancFirst Corporation

Oklahoma City, Oklahoma

We consent to the incorporation by reference in the registration statement of BancFirst Corporation on Forms S-8 (File No. 333-272368, effective June 2, 2023, File No.333-268168, effective November 4, 2022; File No. 333-259292, effective September 3, 2021; File No. 333-233241, effective August 13, 2019; File No. 333-228152, effective November 2, 2018; File No. 333-201524, effective January 15, 2015; and File No. 333-175914, effective July 29, 2011) of our report dated February 27, 2024 on our audits of the consolidated financial statements of BancFirst Corporation as of December 31, 2023 and 2022, and for each of the years in the three-year period ended December 31, 2023, which is included in the Annual Report on Form 10-K. We also consent to the incorporation by reference of our report dated February 27, 2024 on our audit of the internal control over financial reporting of BancFirst Corporation as of December 31, 2023, which is included in the Annual Report on Form 10-K.

/s/ FORVIS, LLP

Oklahoma City, Oklahoma

February 27, 2024

EX-31.1

Exhibit 31.1

CEO’S CERTIFICATION PURSUANT TO RULE 13a-14(a) OR RULE 15d-14(a)

I, David Harlow, certify that:

1.I have reviewed this annual report on Form 10-K of BancFirst Corporation;

2.Based on my knowledge, this annual report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this annual report;

3.Based on my knowledge, the financial statements, and other financial information included in this annual report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this annual report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a – 15(e) and 15d – 15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a – 15(f) and 15d – 15(f)) for the registrant and have:

a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this annual report is being prepared;

b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this annual report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this annual report based on such evaluation; and

d)Disclosed in this annual report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls over financial reporting.

Date:	February 27, 2024	/s/ David Harlow
		David Harlow
		President and Chief Executive Officer
		(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CFO’S CERTIFICATION PURSUANT TO RULE 13a-14(a) OR RULE 15d-14(a)

I, Kevin Lawrence, certify that:

1.I have reviewed this annual report on Form 10-K of BancFirst Corporation;

2.Based on my knowledge, this annual report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this annual report;

3.Based on my knowledge, the financial statements, and other financial information included in this annual report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this annual report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a – 15(e) and 15d – 15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a – 15(f) and 15d – 15(f)) for the registrant and have:

a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this annual report is being prepared;

b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this annual report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this annual report based on such evaluation; and

d)Disclosed in this annual report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls over financial reporting.

Date:	February 27, 2024	/s/ Kevin Lawrence
		Kevin Lawrence
		Executive Vice President and Chief Financial Officer
		(Principal Financial Officer)

EX-32

Exhibit 32

CERTIFICATION

I, David Harlow, Chief Executive Officer and Kevin Lawrence, Chief Financial Officer of BancFirst Corporation (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1)The Annual Report on Form 10-K of the Company for the annual period ended December 31, 2023 (the “Report”) fully complies with the requirements of section 13(a) of the Securities Exchange Act of 1934 (15 U.S.C. 78m); and

(2)The information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ David Harlow

David Harlow

President and Chief Executive Officer

(Principal Executive Officer)

February 27, 2024

/s/ Kevin Lawrence

Kevin Lawrence

Executive Vice President

 and Chief Executive Officer

(Principal Financial Officer)

February 27, 2024

EX-97

Exhibit 97

Section: BancFirst Corporation Effective Date: October 26, 2023

Subject: Recovery of Erroneously Awarded Revision Date:

Executive Compensation

Purpose: To establish the requirements for recovery of erroneously awarded executive compensation in accordance with the requirements of Section 5608 of the Nasdaq Stock Market Corporate Governance Requirements.

Policy:

In the event BancFirst Corporation (the “Company”) is required to issue an accounting restatement of its financial statements due to material noncompliance with any financial reporting requirement under securities laws, the Board of Directors of the Company (the “Board”), or a designated committee or committees authorized by the Board, will enforce the reimbursement or forfeiture of incentive compensation received by any current or former executive officer (those that perform “policy-making functions”, that is Section 16 officers) during the three-year period preceding the date when the Company is required to prepare the accounting restatement. This reimbursement or forfeiture should be the amount of incentive compensation received that exceeds the amount that otherwise would have been received had it been determined based on the restated amounts, without regard to any taxes. The recovery of any amounts from an executive officer who participates in the Deferred Bonus Pool shall be made first against the balance of that officer’s deferred bonus in the pool. It is important to note that incentive-based compensation, for the purpose of this policy, does not include any equity granted, such as stock options or restricted stock units. These equity awards are subject to vesting solely upon the completion of a specified employment period, without any performance condition.

XML

Document and Entity Information - USD ($)

12 Months Ended

Dec. 31, 2023

Jan. 31, 2024

Jun. 30, 2023

Document And Entity Information [Line Items]

Document Type

10-K

Amendment Flag

false

Document Period End Date

Dec. 31, 2023

Document Fiscal Year Focus

2023

Document Fiscal Period Focus

FY

Trading Symbol

BANF

Entity Registrant Name

BANCFIRST CORPORATION

Entity Central Index Key

0000760498

Current Fiscal Year End Date

--12-31

Entity Filer Category

Large Accelerated Filer

Entity Small Business

false

Entity Emerging Growth Company

false

ICFR Auditor Attestation Flag

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Entity Shell Company

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Entity Current Reporting Status

Yes

Entity Interactive Data Current

Yes

Entity Well-known Seasoned Issuer

Yes

Entity Voluntary Filers

No

Title of 12(b) Security

Common Stock, $1.00 Par Value Per Share

Security Exchange Name

NASDAQ

Entity File Number

0-14384

Entity Incorporation, State or Country Code

OK

Entity Tax Identification Number

73-1221379

Entity Address, Address Line One

100 N. Broadway Ave.

Entity Address, City or Town

Oklahoma City

Entity Address, State or Province

OK

Entity Address, Postal Zip Code

73102

City Area Code

405

Local Phone Number

270-1086

Document Annual Report

true

Document Transition Report

false

Entity Common Stock, Shares Outstanding

32,936,410

Entity Public Float

$ 1,879,822,752

Documents Incorporated by Reference

Portions of the Proxy Statement for the 2024 Annual Meeting of Stockholders of the registrant (the “2024 Proxy Statement”) to be filed pursuant to Regulation 14A are incorporated by reference into Part III of this report.

Auditor Name

FORVIS, LLP

Auditor Location

Oklahoma City, OK

Auditor Firm ID

686

Document Financial Statement Error Correction [Flag]

false

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
ASSETS
Cash and due from banks	$ 225,462	$ 259,049
Interest-bearing deposits with banks	2,172,001	2,909,861
Federal funds sold	1,316	2,850
Debt securities held for investment (fair value: $1,190 and $2,383, respectively)	1,190	2,383
Debt securities available for sale at fair value	1,553,905	1,538,221
Loans held for sale	3,489	6,232
Loans held for investment (net of unearned interest)	7,656,645	6,943,563
Allowance for credit losses	(96,800)	(92,728)
Loans, net of allowance for credit losses	7,559,845	6,850,835
Premises and equipment, net	278,594	278,088
Other real estate owned	33,718	36,756
Intangible assets, net	16,704	19,983
Goodwill	182,263	182,055
Accrued interest receivable and other assets	343,555	301,550
Total assets	12,372,042	12,387,863
Deposits:
Noninterest-bearing	3,982,226	4,944,730
Interest-bearing	6,717,896	6,029,498
Total deposits	10,700,122	10,974,228
Short-term borrowings	3,351	300
Accrued interest payable and other liabilities	148,577	76,455
Subordinated debt	86,101	86,044
Total liabilities	10,938,151	11,137,027
Commitments and contingent liabilities (Note 19)
Stockholders' equity:
Common stock, $1.00 par, 40,000,000 shares authorized; shares issued and outstanding: 32,933,018 and 32,875,560, respectively	32,933	32,876
Capital surplus	174,695	169,231
Retained earnings	1,276,305	1,120,292
Accumulated other comprehensive loss, net of income tax benefit of $15,473 and $22,107, respectively	(50,042)	(71,563)
Total stockholders' equity	1,433,891	1,250,836
Total liabilities and stockholders' equity	$ 12,372,042	$ 12,387,863

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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Securities, fair value	$ 1,190	$ 2,383
Common stock, par value	$ 1.00	$ 1.00
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	32,933,018	32,875,560
Common stock, shares outstanding	32,933,018	32,875,560
Accumulated other comprehensive loss, net of tax benefit	$ 15,473	$ 22,107
Senior Preferred Stock [Member]
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Cumulative Preferred Stock [Member]
Preferred stock, par value	$ 5.00	$ 5.00
Preferred stock, shares authorized	900,000	900,000
Preferred stock, shares issued	0	0

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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
INTEREST INCOME
Loans, including fees	$ 467,540	$ 336,340	$ 316,124
Debt securities:
Taxable	36,838	24,456	6,327
Tax-exempt	72	93	204
Federal funds sold	226	83
Interest-bearing deposits with banks	119,260	58,848	4,366
Total interest income	623,936	419,820	327,021
INTEREST EXPENSE
Deposits	195,046	41,965	8,232
Short-term borrowings	312	60	2
Subordinated debt	4,122	4,122	3,130
Total interest expense	199,480	46,147	11,364
Net interest income	424,456	373,673	315,657
Provision for/(benefit from) credit losses	7,458	10,076	(8,690)
Net interest income after provision for (benefit from) credit losses	416,998	363,597	324,347
NONINTEREST INCOME
Securities transactions (includes accumulated other comprehensive income reclassifications of $0, $1,536 and $0, respectively	(1,828)	(1,833)	1,047
Income from sales of loans	2,607	4,548	7,282
Insurance commissions	30,615	26,883	23,745
Cash management	30,716	19,326	12,313
Gain on sale of other assets	1,603	448	2,762
Other	25,544	31,973	26,546
Total noninterest income	185,408	183,747	170,032
NONINTEREST EXPENSE
Salaries and employee benefits	199,986	184,976	166,723
Occupancy, net	21,027	19,326	18,483
Depreciation	18,657	18,600	16,925
Amortization of intangible assets	3,532	3,448	3,116
Data processing services	8,368	7,584	6,735
Net expense from other real estate owned	15,938	9,911	9,089
Marketing and business promotion	9,114	8,074	7,403
Deposit insurance	5,827	4,735	3,456
Other	50,009	53,258	54,051
Total noninterest expense	332,458	309,912	285,981
Income before taxes	269,948	237,432	208,398
Income tax expense	57,483	44,332	40,768
Net income	$ 212,465	$ 193,100	$ 167,630
NET INCOME PER COMMON SHARE
Basic	$ 6.45	$ 5.89	$ 5.12
Diluted	$ 6.34	$ 5.77	$ 5.03
OTHER COMPREHENSIVE (LOSS)/GAIN
Unrealized gains/(losses) on available for sale debt securities, net of tax (expense)/benefit of $(6,634), $23,160 and $1,829, respectively	$ 21,521	$ (74,880)	$ (5,280)
Reclassification adjustment for available for sale debt security gains included in net income, net of tax expense of $0, $(369) and $0, respectively		1,167
Other comprehensive gain/(loss), net of tax (expense)/benefit of $(6,634), $22,791 and $1,829, respectively	21,521	(73,713)	(5,280)
Comprehensive income	233,986	119,387	162,350
Trust Revenue [Member]
NONINTEREST INCOME
Revenue	18,784	15,645	12,912
Service Charges on Deposits [Member]
NONINTEREST INCOME
Revenue	$ 77,367	$ 86,757	$ 83,425

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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Securities transactions accumulated other comprehensive income reclassifications	$ 0	$ 1,536	$ 0
Unrealized gains/(losses) on available for sale debt securities, net of tax (expense)/benefit	(6,634)	23,160	1,829
Reclassification adjustment for available for sale debt security gains included in net income, net of tax expense	0	(369)	0
Other comprehensive gain/(loss), net of tax (expense)/benefit	$ (6,634)	$ 22,791	$ 1,829

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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	COMMON STOCK [Member]	CAPITAL SURPLUS [Member]	RETAINED EARNINGS [Member]	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Balance at beginning of period, Shares at Dec. 31, 2020		32,719,852
Balance at beginning of period at Dec. 31, 2020		$ 32,720	$ 156,574	$ 871,161	$ 7,430
Shares issued for stock options, Shares		95,562
Shares issued for stock options, Value		$ 95	2,165
Net income	$ 167,630			167,630
Net change					(5,280)
Dividends on common stock				(45,752)
Net cash settlement of options			(958)	(4,521)
Stock-based compensation arrangements			2,133
Shares acquired and canceled, Shares		(212,296)
Shares acquired and canceled, Value		$ (212)		(11,451)
Balance at end of period, Shares at Dec. 31, 2021	32,603,118	32,603,118
Balance at end of period at Dec. 31, 2021	$ 1,171,734	$ 32,603	159,914	977,067	2,150
Shares issued for stock options, Shares		272,442
Shares issued for stock options, Value		$ 273	7,376
Net income	$ 193,100			193,100
Net change					(73,713)
Dividends on common stock				(49,875)
Stock-based compensation arrangements			1,941
Balance at end of period, Shares at Dec. 31, 2022	32,875,560	32,875,560
Balance at end of period at Dec. 31, 2022	$ 1,250,836	$ 32,876	169,231	1,120,292	(71,563)
Shares issued for stock options, Shares		78,160
Shares issued for stock options, Value		$ 78	2,465
Net income	$ 212,465			212,465
Net change					21,521
Dividends on common stock				(54,653)
Stock-based compensation arrangements			2,999
Shares acquired and canceled, Shares		(20,702)
Shares acquired and canceled, Value		$ (21)		(1,799)
Balance at end of period, Shares at Dec. 31, 2023	32,933,018	32,933,018
Balance at end of period at Dec. 31, 2023	$ 1,433,891	$ 32,933	$ 174,695	$ 1,276,305	$ (50,042)

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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
RETAINED EARNINGS [Member]
Dividend on common stock	$ 1.66	$ 1.52	$ 1.4

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Consolidated Statements of Cash Flow - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income (Loss)	$ 212,465,000	$ 193,100,000	$ 167,630,000
Adjustments to reconcile to net cash provided by operating activities:
Provision for/(benefit from) credit losses	7,458,000	10,076,000	(8,690,000)
Depreciation and amortization	22,189,000	22,048,000	20,041,000
Net amortization of securities premiums and discounts	(1,269,000)	2,619,000	4,409,000
Realized securities losses (gains)	1,828,000	1,833,000	(1,047,000)
Gain on sales of loans	(2,607,000)	(4,548,000)	(7,282,000)
Cash receipts from the sale of loans originated for sale	149,825,000	246,499,000	369,301,000
Cash disbursements for loans originated for sale	(144,476,000)	(223,407,000)	(354,674,000)
Deferred income tax (benefit) provision	(2,787,000)	322,000	7,044,000
Gain on sale of other real estate owned and other assets	(2,330,000)	(4,682,000)	(3,379,000)
(Increase)/decrease in interest receivable	(9,876,000)	(16,914,000)	4,214,000
Increase/(decrease) in interest payable	7,719,000	3,192,000	(617,000)
Stock-based compensation arrangements	2,999,000	1,941,000	2,133,000
Excess tax benefit from stock-based compensation arrangements	(899,000)	(3,325,000)	(1,932,000)
Other, net	(7,194,000)	(2,482,000)	6,783,000
Net cash provided by operating activities	233,045,000	226,272,000	203,934,000
INVESTING ACTIVITIES
Net cash received from acquisitions, net of cash paid	8,045,000	121,099,000	12,599,000
Net cash paid from sale of assets and liabilities, net of cash received			(13,733,000)
Net decrease in federal funds sold	1,534,000	563,000	14,200,000
Purchases of held for investment debt securities			(845,000)
Purchases of available for sale debt securities	(454,019,000)	(1,881,784,000)	(462,304,000)
Proceeds from maturities, calls and paydowns of held for investment debt securities	1,351,000	74,000	831,000
Proceeds from maturities, calls and paydowns of available for sale debt securities	467,601,000	550,018,000	506,737,000
Proceeds from sales of available for sale debt securities	0	222,474,000	0
Purchase of equity securities	(310,000)	(4,309,000)	(904,000)
Proceeds from paydowns and sales of equity securities	850,000	1,620,000	1,459,000
Net change in loans	(719,287,000)	(521,220,000)	404,393,000
Net receipts (payments) on derivative asset contracts	21,192,000	7,294,000	(14,146,000)
Purchases of premises, equipment and computer software	(22,504,000)	(19,785,000)	(27,251,000)
Purchase of tax credits	(7,635,000)	(9,706,000)	(7,456,000)
Other, net	33,477,000	14,494,000	9,305,000
Net cash (used in) provided by investing activities	(669,705,000)	(1,519,168,000)	422,885,000
FINANCING ACTIVITIES
Net change in deposits	(284,919,000)	2,452,297,000	(191,737,000)
Net change in short-term borrowings	3,051,000	300,000	(1,100,000)
Issuance of common stock in connection with stock options, net	2,543,000	7,649,000	2,260,000
Common stock acquired	(1,820,000)		(11,663,000)
Proceeds from issuance of subordinated notes, net of debt issuance costs			59,150,000
Net cash settlement of options			(5,479,000)
Cash dividends paid	(53,642,000)	(48,462,000)	(45,140,000)
Net cash (used in) provided by financing activities	(334,787,000)	2,411,784,000	(193,709,000)
Net (decrease)/increase in cash, due from banks and interest-bearing deposits	(771,447,000)	1,118,888,000	433,110,000
Cash, due from banks and interest-bearing deposits at the beginning of the period	3,168,910,000	2,050,022,000	1,616,912,000
Cash, due from banks and interest-bearing deposits at the end of the period	2,397,463,000	3,168,910,000	2,050,022,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	191,760,000	42,930,000	11,993,000
Cash paid during the period for income taxes	52,398,000	34,640,000	30,600,000
Noncash investing and financing activities:
Cash (received)/paid consideration for acquisitions	(7,833,000)	77,685,000	21,000,000
Fair value of assets acquired in acquisitions	2,981,000	511,595,000	283,711,000
Liabilities assumed in acquisitions	10,814,000	433,911,000	257,915,000
Unpaid common stock dividends declared	$ 14,161,000	$ 13,150,000	$ 11,737,000

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Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pay vs Performance Disclosure
Net Income (Loss)	$ 212,465	$ 193,100	$ 167,630

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Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false
Rule 10b5-1 Arrangement Modification	false
Non-Rule 10b5-1 Arrangement Modification	false

XML

Description of Business and Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Description of Business and Summary of Significant Accounting Policies

(1) DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

The accounting and reporting policies of BancFirst Corporation and its subsidiaries (the “Company”) conform to accounting principles generally accepted in the United States of America (U.S. GAAP) and general practice within the banking industry. A summary of the significant accounting policies follows.

Nature of Operations

BancFirst Corporation is an Oklahoma business corporation and a financial holding company under federal law. It conducts virtually all of its operating activities through its principal wholly-owned subsidiary, BancFirst (“BancFirst”), an Oklahoma state-chartered bank headquartered in Oklahoma City, Oklahoma. The Company also conducts operating activities through its wholly-owned subsidiaries, Pegasus Bank (“Pegasus”), a Texas state-chartered bank headquartered in Dallas, Texas and Worthington Bank ("Worthington"), a Texas state-chartered bank headquartered in Arlington, Texas. BancFirst, Pegasus and Worthington provide a wide range of retail and commercial banking services, including: commercial, real estate, agricultural and consumer lending; depository and funds transfer services; collections; safe deposit boxes; cash management services; and other services tailored for both individual and corporate customers. BancFirst also offers trust services and acts as executor, administrator, trustee, transfer agent and in various other fiduciary capacities. BancFirst provides item processing, research and other correspondent banking services to financial institutions and governmental units. The Company’s wholly-owned subsidiary, BancFirst Insurance Services, Inc., an independent insurance agency, offers a variety of commercial and personal insurance products. In addition, the Company’s wholly-owned subsidiary, Council Oak Partners, LLC, an Oklahoma limited liability company, engages in investing activities.

Basis of Presentation

The accompanying consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., Pegasus, Worthington and BancFirst and its subsidiaries. The principal operating subsidiaries of BancFirst are BFTower, LLC, BFC-PNC LLC, BF Brazito, LLC, and BancFirst Agency, Inc. All significant intercompany accounts and transactions have been eliminated. Assets held in a fiduciary or agency capacity are not assets of the Company and, accordingly, are not included in the consolidated financial statements. Certain amounts from 2022 and 2021 have been reclassified to conform to the 2023 presentation. These reclassifications were not material to the Company’s consolidated financial statements.

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with U.S. GAAP inherently involves the use of estimates and assumptions that affect the amounts reported in the financial statements and the related disclosures. These estimates relate principally to the determination of the allowance for credit losses, income taxes, the fair value of financial instruments and the valuation of assets and liabilities acquired in a business combination, including identifiable intangible assets. Such estimates and assumptions may change over time and actual amounts realized may differ from those reported.

Securities

The Company invests in debt securities. Any sales of debt securities are for the purpose of executing the Company’s asset/liability management strategy, eliminating a perceived credit risk in a specific security or providing liquidity. Debt securities that are being held for indefinite periods of time, or that may be sold as part of the Company’s asset/liability management strategy, to provide liquidity or for other reasons, are classified as available for sale and are stated at estimated fair value. Unrealized gains or losses on debt securities available for sale are reported as a component of stockholders’ equity, net of income tax. Gains or losses from sales of debt securities are based upon the book values of the specific debt securities sold. Debt securities for which the Company has the intent and ability to hold to maturity are classified as held for investment and are stated at cost, adjusted for amortization of premiums and accretion of discounts computed under the interest method. The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. The Company first assesses whether it intends to sell or it is more-likely-than-not that it will be required to sell the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities amortized cost basis is written down to fair value as a current period expense. If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. The Company does not consider the unrealized position of its debt securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for

credit losses against its debt securities portfolio, as the credit risk is not material. The Company does not engage in securities trading activities.

The Company invests in equity securities without readily determinable fair values and utilizes Level 3 inputs. These securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income. Equity securities are reported in other assets on the consolidated balance sheet. The Company reviews its portfolio of equity securities for impairment at least quarterly.

Loans

The lending function is governed by written policies and procedures, as determined by senior management and approved by the Board of Directors. The policies and procedures set the standards for lending in each major loan category by collateral type and use of loan proceeds. The objectives of these policies and procedures are to identify profitable markets, determine appropriate risk tolerance levels for each type of loan, establish limits for loan officer approval, set concentration limits, establish loan-to-value thresholds, set repayment terms and loan structure guidelines and adhere to documentation requirements. Interest rate risk is controlled by the use of variable rate provisions, the vast majority of which have a rate floor, limits on fixing rates for longer periods and the use of prepayment penalties.

Loans originated within the Company are stated at the principal amount outstanding, net of unearned interest, loan fees and allowance for credit losses. Interest on all performing loans is recognized, on a simple interest basis, based upon the principal amount outstanding. See Note (5) for loan disclosures.

Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts. The Company has made the accounting policy election to exclude accrued interest receivable on loans from the estimate of credit losses because it writes off uncollectible accrued interest in a timely manner. Interest income is accrued on the unpaid principal balance using the simple-interest method on the daily balances of the principal amounts outstanding.

The Company writes off accrued interest once a loan enters non-accrual status. The Company debits interest income for the interest accrued. No interest will be accrued on loans, for which a default of principal or interest has existed for a period of at least 90 days unless the collateral margin or guarantor support are such that full collection of principal and interest are not in doubt and an orderly plan for collection is in process. The Company also suspends interest recognition on any other loan for which it is more likely than not that future contractual payments will not be collected.

Interest income on consumer and commercial loans is discontinued and placed on nonaccrual status at the time the loan is 90 days delinquent unless the loan is well secured and in process of collection. Consumer loans are charged off at 180 days past due and commercial loans are charged off to the extent principal or interest is deemed uncollectible. Past-due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful.

All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. The amount of interest accrued but not received for loans placed on nonaccrual and reversed against interest income was $429,000, $147,000 and $83,000 for the years ended December 31, 2023, 2022 and 2021, respectively. Interest received on such loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Under the cost-recovery method, interest income is not recognized until the loan balance is reduced to zero. Under the cash-basis method, interest income is recorded when the payment is received in cash. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.

Modifications of loans to existing borrowers generally consist of interest rate reductions, extension of payment terms, or a combination of these. Modifications may arise either voluntarily through negotiations with the borrower or involuntarily through court order. Payment deferrals up to six months are generally considered to be short-term modifications. Generally, principal and accrued but unpaid interest is not voluntarily forgiven. A change to the allowance for credit losses is generally not recorded upon modification because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the allowance methodology.

Residential real estate loans are made in accordance with underwriting policies and are fully documented. Credit worthiness is assessed based on significant credit characteristics including credit history and residential and employment stability. The Company does not engage in any hybrid loan programs. In addition, the Company does not have any exposure to loans with negative amortization, interest rate carryover or discounting of the initial rates (teaser rates).

An updated appraisal of the collateral is obtained when a loan is first identified as a problem loan. Appraisals are reviewed annually and are updated as needed or are updated more frequently if significant changes are believed to have occurred in the collateral or market conditions. Appraisals of other real estate owned are also reviewed and updated consistent with this policy.

When a loan deteriorates to the point that the account officer or the Loan Committee concludes it no longer represents a viable asset, it will be charged off. Similarly, any portion of a loan that is deemed to no longer be a viable asset will be charged off. A loan will not be charged off unless such action has been approved by the branch President.

Acquired Loans

Loans acquired through business combinations are required to be carried at fair value as of the date of the combination. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date. The methodology of allowance for credit loss recorded for these acquired loans depends on whether the acquired loans are purchase credit deteriorated or non-purchase credit deteriorated. An allowance for credit loss for non-purchase credit deteriorated loans is determined and recorded in a manner consistent with originated loans. That is, the allowance for credit loss is calculated based on the loan’s amortized cost basis (i.e., the acquisition date fair value in a business combination) and is established through a charge to provision expense at the acquisition date. An allowance for credit loss for purchase credit deteriorated loans is recorded as an adjustment to the loans, in addition to the fair value amount recorded, as of the acquisition date, and not through provision expense. The acquisition date fair value plus the allowance for credit loss equals the loans new amortized cost basis as of the acquisition date. The difference between the new amortized cost basis and the unpaid principal balance of the loan represents the non-credit purchase discount/premium recorded. The difference between the fair value of loans which do not have specific evidence of deterioration of credit quality since origination and their principal balance is recognized in interest income on a level-yield method over the life of the loans. For loans which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments (as determined by the present value of expected future cash flows), the difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” is recognized in interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “nonaccretable difference,” are not recognized as yield adjustments or as loss accruals or valuation allowances. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining life. Decreases in expected cash flows are recognized as impairments. Any probable loss due to subsequent credit deterioration of the loans since acquisition is provided for in the allowance for credit losses.

Purchased Credit Deteriorated (PCD) Loans

The Company has purchased loans, some of which have experienced more than insignificant credit deterioration since origination. An allowance for credit losses is determined using the same methodology as other loans held for investment. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The sum of the loan’s purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the allowance for credit losses are recorded through provision expense.

Loans Held for Sale

The Company originates mortgage loans to be sold. At the time of origination, the acquiring bank has already been determined and the terms of the loan, including the interest rate, have already been set by the acquiring bank allowing the Company to originate the loan at fair value. Mortgage loans are generally sold within 30 days of origination. Loans held for sale are carried at the lower of cost or fair value. Gains or losses recognized upon the sale of the loans are determined on a specific identification basis. The Company does not sell residential mortgage loans with recourse other than obligations under standard representations and warranties or for fraud. These obligations relate to loan performance for the life of the loan. The amount of loans repurchased since the inception of the program is not considered to be material, and therefore, no reserve has been required.

Allowance for Credit Losses

The allowance for credit losses is a valuation account that is deducted from the loans amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the uncollectibility of a

loan balance is confirmed. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. The allowance for credit losses is increased by provisions charged to operating expense and is reduced by net loan charge-offs.

The Company considers various factors to monitor the credit risk in the loan portfolio including volume and severity of loan delinquencies, nonaccrual loans, internal grading of loans, historical loan loss experience and economic conditions.

Management estimates the allowance balance using relevant available information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, delinquency level, or term as well as for changes in environmental conditions, such as the political, legal, and regulatory environment, technology and consumer preferences. Historical loss information is also adjusted for reasonable and supportable changes in national and local economic conditions, such as consumer loans 90 days past due and commercial bankruptcies. Economic conditions are forecast as "current conditions" over the forecast period. Forecast models were used to validate credit performance during the forecast period. Beyond the reasonable and supportable forecast, the economic expectation reverts to the historical average, which is determined by the weighted average life of each loan pool.

If a loan is individually evaluated a specific allowance is provided, if necessary, so that the loan is reported net, at the fair value of collateral. Interest payments on collateral dependent loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Loans, or portions thereof, are charged off when deemed uncollectible. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist.

Determining the Contractual Term

Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications unless the following applies: the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company.

Allowance for Credit Losses on Off-Balance Sheet Credit Exposures

The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The allowance for credit losses on off-balance sheet credit exposures is adjusted as a provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. Based on a low likelihood that funding will occur and the Company’s ability to manage the extension of credit to our borrowers, the allowance for credit losses on off-balance sheet credit exposure is not material.

Allowance for Credit Losses on Available-for-Sale Debt Securities

The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. The Company first assesses whether it intends to sell or it is more-likely-than-not that it will be required to sell the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities amortized cost basis is written down to fair value as a current period expense. If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. At December 31, 2023 and December 31, 2022 approximately 98% of the available for sale debt securities held by the Company were issued by the U.S. Treasury, or U.S. government-sponsored entities and agencies. The Company does not consider the unrealized loss position of these securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for credit losses against its debt securities portfolio, as the credit risk is not material.

Nonaccrual Policy

A loan is placed on nonaccrual status when, in the opinion of management, the future collectability of both interest and principal is not probable. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest income is recognized on certain of these loans on a cash basis if the full collection of the remaining principal balance is reasonably expected. Otherwise, interest income is not recognized until the principal balance is fully collected.

The Company does not accrue interest on (1) any loan upon which a default of principal or interest has existed for a period of 90 days or over unless the collateral margin or guarantor support are such that full collection of principal and interest are not in doubt, and an orderly plan for collection is in process; and (2) any other loan for which it is expected full collection of principal and interest is not probable.

A nonaccrual loan may be restored to an accrual status when none of its principal and interest are past due and unpaid or otherwise becomes well secured and in the process of collection and when prospects for collection of future contractual payments are no longer in doubt. With the exception of a formal debt forgiveness agreement, no loan which has had principal charged-off shall be restored to accrual status unless the charged-off principal has been recovered.

Premises and Equipment

Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is charged to operating expense and is computed using the straight-line method over the estimated useful lives of the assets. Maintenance and repairs are charged to expense as incurred while improvements are capitalized. Premises and equipment is tested for impairment if events or changes in circumstances occur that indicate that the carrying amount of any premises and equipment may not be recoverable. Impairment losses are measured by comparing the fair values of the premises and equipment with their recorded amounts. Premises that are identified to be sold are transferred to other real estate owned at the lower of their carrying amounts or their fair values less estimated costs to sell. Any losses on premises identified to be sold are charged to operating expense. When premises and equipment are transferred to other real estate owned, sold, or otherwise retired, the cost and applicable accumulated depreciation are removed from the respective accounts and any resulting gains or losses are reported in the consolidated statements of comprehensive income. Construction in progress includes all the costs of construction associated with the building of fixed long-term assets and is included in premises and equipment, net as an asset. When construction is completed, the asset is reclassified as a building or a leasehold improvement and depreciated over its applicable useful life.

Leases

Certain operating leases are included as right of use lease assets in accrued interest receivable and other assets on the consolidated balance sheet and a related lease liability is included in accrued interest payable and other liabilities on the consolidated balance sheet. Right of use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The lease liability is measured as the present value of the unpaid lease payments, and the right of use assets value is derived from the calculation of the lease liability. To calculate the discount rate for each lease, the Company uses the rate implicit in the lease if available, otherwise an appropriate Federal Home Loan Bank ("FHLB") advance borrowing rate is used that correlates with the term of the lease.

Other Real Estate Owned

Other real estate owned ("OREO") consists of properties acquired through foreclosure proceedings or acceptance of a deed in lieu of foreclosure, and premises held for sale. These properties are carried at the lower of the book values of the related loans or fair values based upon appraisals, less estimated costs to sell. Losses arising at the time of reclassification of such properties from loans to OREO are charged directly to the allowance for credit losses. Any losses on premises identified to be sold are charged to operating expense at the time of transfer from premises to OREO. Losses from declines in value of the properties subsequent to classification as OREO are charged to operating expense. Revenues and expenses for OREO property are included in the consolidated statements of comprehensive income for the period in which they occur. Gross rental income for OREO is included in other non-interest income. The expenses of operating or holding OREO property are included in noninterest expense.

Intangible Assets and Goodwill

Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives of seven to ten years and customer relationship intangibles are amortized on a straight-line basis over the estimated useful life of three to eighteen years. Goodwill is not amortized but is evaluated at a reporting unit level at least annually for impairment, or more frequently if other indicators of impairment are present. At least annually in the fourth quarter, intangible assets are evaluated for possible impairment. Impairment losses are measured by comparing the fair values of the intangible assets with their recorded amounts. Any impairment losses are reported in the consolidated statements of comprehensive income.

Advertising Costs

Advertising costs are expensed as incurred. Advertising costs for the year ended December 31, 2023 were $3.2 million. Advertising costs for the years ended December 31, 2022 and 2021 were both $3.0 million.

Stock-based Compensation

The Company recognizes stock-based compensation as compensation expense in the consolidated statements of comprehensive income based on the fair value of the Company’s stock options and restricted stock units ("RSU's") on the measurement date, which, for the Company, is the date of the grant. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model and is based on certain assumptions including risk-free rate of return, dividend yield, stock price volatility and the expected term. The fair value of each RSU granted is equal to the market price of the Company’s stock at the date of grant. The fair value of each option and RSU is expensed over its vesting period.

Income Taxes

The Company files a consolidated income tax return with its subsidiaries. Federal and state income tax expense or benefit has been allocated to subsidiaries on a separate return basis. Deferred taxes are recognized under the balance sheet method based upon the future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities, using the tax rates expected to apply to taxable income in the periods when the related temporary differences are expected to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years. Although realization is not assured, management believes it is more likely than not that all of the deferred tax assets will be realized.

Earnings Per Common Share

Basic earnings per common share is computed by dividing net income, less any preferred dividends requirement, by the weighted average of common shares outstanding. Diluted earnings per common share reflects the potential dilution that could occur if options, RSU's, convertible securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the Company.

Revenue Recognition

In addition to lending and related activities, the Company offers various services to customers that generate revenue. Contract performance typically occurs in one year or less. Incremental costs of obtaining a contract are expensed when incurred when the amortization period is one year or less.

Sales of real estate

The sale of real estate property is generally recognized, along with any associated gain or loss, when control of the property transfers to the buyer.

Service and transaction fees on depository accounts

Customers often pay certain fees to the bank to access the cash on deposit including certain non-transactional fees such as account maintenance or dormancy fees, and certain transaction-based fees such as non-sufficient funds fees, overdraft, ATM, wire transfer, or foreign exchange fees. Revenue is recognized when the transactions occur or as services are performed over primarily monthly or quarterly periods. Payment is typically received in the period the transactions occur, or in some cases, within 90 days of the service period.

Interchange Fees

Interchange fees, or “swipe” fees, are charges that merchants pay to the processors who, in turn, share that revenue with us and other card-issuing banks for processing electronic payment transactions. Interchange fees represent the portion of the debit card transaction amount that the card issuer retains to compensate it for processing transactions and providing rewards. Interchange fees are settled and recognized on a daily or monthly basis.

Insurance Commissions and Fees

Insurance commissions are received on the sale of insurance products, and revenue is recognized upon the placement date of the insurance policies or when such commissions are received. Payment is normally received within the policy period. In addition to placement, the Company also provides insurance policy related risk management services. Revenue is recognized as these services are provided. Performance-based commissions are recognized when received or earlier when, upon consideration of past results and current condition, the revenue is deemed not probable of reversal.

For accounts billed by BancFirst Insurance Services, Inc., commission revenue is recognized at the later of the billing date or the effective date of the related insurance policies. Commission revenue, for accounts that are directly billed by the insurance company to the insured, is recognized when determinable by BancFirst Insurance Services, Inc., which is generally when such commissions are received.

BancFirst Insurance Services, Inc. also receives contingent commissions from insurance companies as additional incentive for achieving specified premium volume goals and/or loss experience parameters relating to the insurance they place. Contingent commissions from insurance companies are recognized when determinable, which is generally when such commissions are received.

Trust

BancFirst offers trust services and acts as executor, administrator, trustee, transfer agent and in various other fiduciary capacities. There are four basic types of fees that are included in the trust department income. Administrative fees are assessed for managing trust accounts. Shareholder fees are received in connection with holding specific fund share classes. In return for these services, the mutual fund (or its distributor or investment advisor) pay a fee to BancFirst. Oil and gas fees are assessed for management of oil and gas related activities. There are also other types of fees charged on a one time basis such as those related to opening and closing trust accounts. BancFirst records trust fees on a monthly, quarterly or annual basis based on the size of the asset being managed. Fees may be fixed or, where applicable, based on a percentage of transaction size of managed assets. These fees are recorded as revenue at the time the fee is billed, according to the agreement with the customer.

Comprehensive Income

Comprehensive income includes all changes in stockholders’ equity during a period, except those resulting from transactions with stockholders. Besides net income, other components of the Company’s comprehensive income includes the after tax effect of changes in the net unrealized gain/loss on debt securities available for sale. The Company’s policy is to release material stranded tax effects included in accumulated other comprehensive income on a specific identification basis.

Consolidated Statements of Cash Flows

For purposes of the consolidated statements of cash flows, the Company considers cash and due from banks and interest-bearing deposits with banks as cash equivalents.

Recent Accounting Pronouncements

Standards Not Yet Adopted:

In November 2023, the Financial Accounting Standards Board (“FASB“) issued Accounting Standards Update (“ASU”) 2023-07, “Segment Reporting - Improvements to Reportable Segment Disclosures” requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal year beginning after December 15, 2024 on a retrospective basis. The amendments are to be applied retrospectively to all periods presented and segment expense categories should be based on the categories identified at adoption. The Company does not expect adoption of the standard to have a material impact on its consolidated financial statements.

In December 2023, FASB issued ASU No. 2023-09, “Income Taxes - Improvements to Income Tax Disclosures” requiring enhancements and further transparency to certain income tax disclosures, most notably the tax rate reconciliation and income taxes paid. This ASU is effective for fiscal years beginning after December 15, 2024 on a prospective basis and retrospective application is permitted. The Company does not expect adoption of the standard to have a material impact on its consolidated financial statements.

Standards Adopted During the Current Period:

In March 2022, FASB issued ASU No. 2022-02, “Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” ASU 2022-02 eliminated the Troubled Debt Restructurings (“TDR”) recognition and measurement guidance and, instead, required that the Company evaluate, based on the accounting for loan modifications, whether the modification represents a new loan or a continuation of an existing loan when a borrower is experiencing financial difficulty. In addition, the update required that the Company disclose current-period charge-offs by year of origination for financing receivables. The current-period charge-off amendment was applied prospectively. The amendments were effective for annual periods beginning after December 15, 2022, including interim periods within those annual periods. The Company adopted ASU 2022-02 on a prospective basis on January 1, 2023. ASU No. 2022-02 did not have a significant impact on the Company’s consolidated financial statements.

Prior to the adoption of ASU 2022-02, a TDR occurred when a loan to a borrower experiencing financial difficulty was restructured with a concession provided that a creditor would not otherwise consider. For the Company's accounting policy related to TDRs granted prior to the adoption of ASU 2022-02, refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

In March 2023, FASB issued ASU No. 2023-02, “Investments - Equity Method and Joint Ventures (Topic 323)”. ASU 2023-02 permits the election of accounting for tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method, if certain conditions are met. Using the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the income tax credits and other income tax benefits received and recognizes the net amortization and income tax credits and other income tax benefits in the income statement as a component of income tax expense (benefit). The amendments are effective for annual periods beginning after December 15, 2023, including interim periods within those annual periods. Early adoption is permitted for all entities in any interim period. The Company adopted the amendment as of January 1, 2023 using the modified retrospective transition. The Company has investments in New Markets Tax Credits ("NMTC"), Low-Income Housing Tax Credits ("LIHTC") and other tax credits that were affected by ASU 2023-02. As a result of the adoption of ASU No. 2023-02, the Company recorded $25.1 million in other assets and other liabilities on the consolidated balance sheet during 2023 for unfunded LIHTC commitments and amortized $6.0 million of NMTC and other tax credit investments to income tax expense during the period that would have previously been recorded to other expense. ASU No. 2023-02 did not have a significant impact on the Company’s consolidated financial statements as disclosed above.

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Recent Developments, Including Mergers and Acquisitions

12 Months Ended

Dec. 31, 2023

Recent Developments Including Mergers And Acquisitions [Abstract]

Recent Developments, Including Mergers and Acquisitions

(2) RECENT DEVELOPMENTS, INCLUDING MERGERS AND ACQUISITIONS

BancFirst Corporation is regulated by the Federal Reserve System as a financial holding company. On August 11, 2023, BancFirst became a Federal Reserve System member bank, which changed its primary regulator from the Federal Deposit Insurance Corporation (“FDIC”) to the Federal Reserve System. Worthington became a Federal Reserve System member bank on September 1, 2023, and Pegasus became a Federal Reserve System member bank on October 12, 2023, which changed their primary regulator from the FDIC to the Federal Reserve System.

On July 20, 2023, BancFirst purchased approximately $2.5 million in total assets, which included $2.1 million in loans, and assumed $10.8 million in deposits and other obligations, from RCB Bank's Stroud, Oklahoma branch. RCB Bank paid BancFirst $7.8 million as a result of this transaction. In addition, the Company recorded a core deposit intangible of $252,000 and goodwill of $209,000. The Company did not incur a material amount of purchase-related expenses. The effect of this purchase was included in the consolidated financial statement of the Company from the date of purchase forward. The purchase did not have a material effect on the Company's consolidated financial statements. The purchase of this branch strengthens BancFirst's presence in the Stroud, Oklahoma community.

On February 8, 2022, the Company acquired Worthington for an aggregate cash purchase price of $77.7 million. At the time of the acquisition, Worthington was chartered and regulated by the Texas State Banking Department with one banking location in Arlington, Texas, one in Colleyville, Texas and two in Fort Worth, Texas. Worthington had approximately $478 million in total assets, $257 million in loans and $430 million in deposits. Worthington will continue to operate under a separate charter and remain a separate subsidiary of the Company governed by its existing board of directors. The Company intends to provide an appropriate amount of capital or other support to increase Worthington’s ability to approve larger loans and allow Worthington to continue to grow earning assets. As a result of the acquisition, the Company recorded a core deposit intangible of $5.9 million and goodwill of $32.1 million. The Company did not incur a material amount of acquisition-related expenses. The effect of this acquisition was included in the consolidated financial statements of the Company from the date of acquisition forward. Pro forma information has not been presented because the acquisition did not have a material effect on the Company’s consolidated financial statements. The acquisition of Worthington complemented the Company's growing presence in the Dallas-Fort Worth market.

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Cash, Due from Banks, Interest-Bearing Deposits and Federal Funds Sold

12 Months Ended

Dec. 31, 2023

Cash and Cash Equivalents [Abstract]

Cash, Due from Banks, Interest-Bearing Deposits and Federal Funds Sold

(3) CASH, DUE FROM BANKS, INTEREST-BEARING DEPOSITS AND FEDERAL FUNDS SOLD

The Company maintains accounts with the Federal Reserve Bank and various other financial institutions primarily for the purpose of holding excess liquidity and clearing cash items. It may also sell federal funds to certain of these institutions on an overnight basis. At December 31, 2023 and 2022, the Company had no significant concentrations of credit risk with other financial institutions. The Company maintained vault cash and funds on deposit with the Federal Reserve Bank, which is included in the following table:

	December 31,
	2023		2022
	(Dollars in thousands)
Vault cash and funds on deposit with the Federal Reserve Bank	$	2,255,198	$	2,942,665

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Securities

12 Months Ended

Dec. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Securities

(4) SECURITIES

The following table summarizes the amortized cost and estimated fair values of debt securities held for investment:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(Dollars in thousands)
December 31, 2023
Mortgage backed securities (1)	$	5	$	—	$	—	$	5
States and political subdivisions		685		—		—		685
Other securities		500		—		—		500
Total	$	1,190	$	—	$	—	$	1,190
December 31, 2022
Mortgage backed securities (1)	$	13	$	—	$	—	$	13
States and political subdivisions		1,870		—		—		1,870
Other securities		500		—		—		500
Total	$	2,383	$	—	$	—	$	2,383

The following table summarizes the amortized cost and estimated fair values of debt securities available for sale:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(Dollars in thousands)
December 31, 2023
U.S. treasuries	$	1,560,265	$	415	$	(62,635	)	$	1,498,045
U.S. federal agencies		11,631		142		(3	)		11,770
Mortgage backed securities (1)		16,459		13		(1,677	)		14,795
States and political subdivisions		10,108		16		(114	)		10,010
Asset backed securities		12,794		—		(282	)		12,512
Other securities		8,163		—		(1,390	)		6,773
Total	$	1,619,420	$	586	$	(66,101	)	$	1,553,905
December 31, 2022
U.S. treasuries	$	1,568,563	$	—	$	(90,699	)	$	1,477,864
U.S. federal agencies		15,025		198		(1	)		15,222
Mortgage backed securities (1)		18,449		21		(1,884	)		16,586
States and political subdivisions		8,320		35		(221	)		8,134
Asset backed securities		13,371		—		(361	)		13,010
Other securities		8,163		—		(758	)		7,405
Total	$	1,631,891	$	254	$	(93,924	)	$	1,538,221

(1)Primarily consists of FHLMC, FNMA, GNMA and mortgage backed securities through U.S. agencies.

The maturities of debt securities held for investment and available for sale are summarized in the following table using contractual maturities. Actual maturities may differ from contractual maturities due to obligations that are called or prepaid. For purposes of the maturity table, mortgage-backed securities, which are not due at a single maturity date, have been presented at their contractual maturity.

	December 31,
	2023				2022
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
	(Dollars in thousands)
Held for Investment
Contractual maturity of debt securities:
Within one year	$	350	$	350	$	1,186	$	1,186
After one year but within five years		840		840		1,195		1,195
After five years but within ten years		—		—		2		2
After ten years		—		—		—		—
Total	$	1,190	$	1,190	$	2,383	$	2,383
Available for Sale
Contractual maturity of debt securities:
Within one year	$	348,318	$	341,645	$	101,607	$	100,655
After one year but within five years		1,223,529		1,167,973		1,316,874		1,233,725
After five years but within ten years		10,331		8,851		170,513		163,101
After ten years		37,242		35,436		42,897		40,740
Total debt securities	$	1,619,420	$	1,553,905	$	1,631,891	$	1,538,221

The following is a detail of proceeds from sales and the realized losses on available for sale debt securities:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Proceeds	$	—	$	222,474	$	—
Gross losses realized		—		3,990		—

In March 2022, the Company sold $226 million of debt securities with an average yield of 0.16%, the proceeds of which were subsequently reinvested in $220 million of debt securities with an average yield of 1.86%. The Company used specific identification to reclassify the unrealized loss in other comprehensive income to a realized loss, as shown in the consolidated statements of comprehensive income. There were no sales of securities and therefore no proceeds from sales or realized securities losses on available for sale debt securities for the years ended December 31, 2023 and 2021, respectively.

Realized gains/losses on debt and equity securities are reported as securities transactions within the noninterest income section of the consolidated statements of comprehensive income.

The following table is a summary of the Company’s book value of debt securities that were pledged as collateral for public funds on deposit, repurchase agreements and for other purposes as required or permitted by law:

	December 31,
	2023		2022
	(Dollars in thousands)
Book value of pledged securities	$	591,324	$	573,952

The following table summarizes debt securities with unrealized losses, segregated by the duration of the unrealized loss, at December 31, 2023 and 2022 respectively:

			Less than 12 Months				More than 12 Months				Total
	Number of investments		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
			(Dollars in thousands)
December 31, 2023
Available for Sale
U.S. treasuries		68	$	4,838	$	90	$	1,401,669	$	62,545	$	1,406,507	$	62,635
U.S. federal agencies		3		1,100		3		—		—		1,100		3
Mortgage backed    securities		74		80		—		13,261		1,677		13,341		1,677
States and political    subdivisions		6		306		4		1,847		110		2,153		114
Asset backed securities		1		—		—		12,512		282		12,512		282
Other securities		3		—		—		6,773		1,390		6,773		1,390
Total		155	$	6,324	$	97	$	1,436,062	$	66,004	$	1,442,386	$	66,101
December 31, 2022
Available for Sale
U.S. treasuries		74	$	787,925	$	27,078	$	689,939	$	63,621	$	1,477,864	$	90,699
U.S. federal agencies		1		—		—		349		1		349		1
Mortgage backed    securities		92		10,001		1,239		5,055		645		15,056		1,884
States and political    subdivisions		8		2,308		184		464		37		2,772		221
Asset backed securities		1		13,010		361		—		—		13,010		361
Other securities		3		4,871		291		2,534		467		7,405		758
Total		179	$	818,115	$	29,153	$	698,341	$	64,771	$	1,516,456	$	93,924

The Company has the ability and intent to hold the debt securities classified as held for investment until they mature, at which time the Company will receive full value for the debt securities. Furthermore, as of December 31, 2023 and 2022, the Company also had the ability and intent to hold the debt securities classified as available for sale for a period of time sufficient for a recovery of cost. The unrealized losses are due to increases in market interest rates over the yields available at the time the underlying debt securities were purchased. The fair value of those debt securities having unrealized losses is expected to recover as the securities approach their maturity date or repricing date, or if market yields for such investments decline. The Company has no intent or requirement to sell before the recovery of the unrealized loss; therefore, no impairment loss was realized in the Company’s consolidated statements of comprehensive income.

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Loans Held for Investment and Allowance for Credit Losses on Loans

12 Months Ended

Dec. 31, 2023

Receivables [Abstract]

Loans Held for Investment and Allowance for Credit Losses on Loans

(5) LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES ON LOANS

Loans held for investment are summarized by portfolio segment as follows:

	December 31,
	2023		2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	960,944	$	908,494
Commercial real estate non-owner occupied		1,486,420		1,383,150
Construction and development < 60 months		642,643		475,236
Construction residential real estate < 60 months		283,486		303,305
Residential real estate first lien		1,258,744		1,117,899
Residential real estate all other		244,696		196,198
Agriculture		427,139		408,037
Commercial non-real estate		1,289,452		1,241,454
Consumer non-real estate		476,467		446,756
Oil and gas		586,654		463,034
Total (1)	$	7,656,645	$	6,943,563
(1) Excludes accrued interest receivable of $39.4 million at December 31, 2023 and $30.6 million at December 31, 2022, that is recorded in accrued interest
receivable and other assets.

Certain loan segments for 2022 were reclassified to conform to the 2023 presentation. Each loan segment consists of loan categories possessing similar risk characteristics. The Company’s re-alignment of the segments primarily consisted of reclassifying farmland and agriculture related loans that were previously included in consumer-related and commercial-related loans to the agriculture category. Management believes this accurately represents the risk profile of each loan segment. These reclassifications did not have a significant impact on the allowance for credit losses.

The Company's loans are currently 84% held by BancFirst and 16% held by Pegasus and Worthington. In addition, approximately 69% of the Company's loans are secured by real estate. Credit risk on loans is managed through limits on amounts loaned to individual and related borrowers, underwriting standards and loan monitoring procedures. The amounts and types of collateral obtained, if any, to secure loans are based upon the Company’s underwriting standards and management’s credit evaluation. Collateral varies, but may include real estate, equipment, accounts receivable, inventory, livestock and securities. The Company’s interest in collateral is secured through filing mortgages and liens, and in some cases, by possession of the collateral.

The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist. The Company has identified the following portfolio segments, which includes the applicable weighted average remaining life, and measures the allowance for credit losses using the vintage loss analysis adjusted for qualitative factors:

Portfolio Segments	Life (in years)
Real estate:
Commercial real estate owner occupied		9
Commercial real estate non-owner occupied		6
Construction and development < 60 months		3
Construction residential real estate < 60 months		2
Residential real estate first lien		15
Residential real estate all other		8
Agriculture		9
Commercial non-real estate		4
Consumer non-real estate		4
Oil and gas		2

These portfolio segments are separately identified because they exhibit distinctive risk characteristics, such as financial asset types, loan purpose, collateral, and industry of the borrower. A summary of our primary portfolio segments is as follows:

Commercial real estate owner occupied. Commercial real estate owner occupied are nonresidential property loans for which the primary source of repayment is the cash flow from the ongoing operations and activities conducted by the entity, or an affiliate of the entity, who owns the property. This category includes, among other loans, loans secured by office buildings, garden office buildings, manufacturing facilities, warehouse and flex warehouse facilities, hospitals, and car washes unless the property is owned by an investor who leases the property to the operator who, in turn, is not related to or affiliated with the investor.

Commercial real estate non-owner occupied. Commercial real estate non-owner occupied are nonresidential property loans where the primary source of repayment is derived from rental income associated with the property or the proceeds of the sale, refinancing, or permanent financing of the property. This category includes, among other loans, loans secured by shopping centers, office buildings, hotels/motels, nursing homes, assisted-living facilities, mini-storage warehouse facilities, and similar properties.

Construction and development < 60 months. Residential development loans include loans to develop raw land into a residential development. Advances on the loans typically include land costs, hard costs (grading, utilities, roads, etc.), soft costs (engineering fees, development fees, entitlement fees, etc.) and carrying costs until the development is completed. Upon completion of the development, the loan is typically repaid through the sale of lots to homebuilders.

Construction residential real estate < 60 months. Residential construction includes loans to builders for speculative or custom homes, as well as direct loans to individuals for construction of their personal residence. Custom construction and self-construction loans typically will have commitments in place for long-term financing at the completion of construction. Speculative construction loans generally will have periodic curtailment plans beginning after completion of construction and a reasonable time for sales to have occurred.

Residential real estate first lien. Residential real estate first lien loans includes all closed-end loans secured by first liens on 1-to-4 family residential properties. This category includes property containing 1-to-4 dwelling units (including vacation homes) or more than four dwelling units if each is separated from other units by dividing walls that extend from ground to roof. This category also includes individual condominium dwelling units and loans secured by an interest in individual cooperative housing units, even if in a building with five or more dwelling units.

Residential real estate all other. Residential real estate all other loans includes loans secured by junior (i.e., other than first) liens on 1-to-4 family residential properties. This category includes loans secured by junior liens even if the Company also holds a loan secured by a first lien on the same 1-to-4 family residential property.

Agricultural. This category includes loans secured by all land known to be used or usable for agricultural purposes, such as crop and livestock production.

Commercial non-real estate. Commercial non-real estate represent loans for working capital, facilities acquisition or expansion, purchase of equipment and other needs of commercial customers primarily located within Oklahoma. Loans in this category include commercial and industrial and state and political subdivisions.

Consumer non-real estate. Consumer loans are loans to individuals for household, family and other personal expenditures. Commonly, such loans are made to finance purchases of consumer goods, such as automobiles, boats, household goods, vacations and education.

Oil and gas. Oil and gas loans represent loans for producing oil and gas properties and any other mineral interests that may be pumped, mined, quarried or otherwise extracted from the earth. These loans also include upstream and midstream energy loans, and loans to companies that provide ancillary services to the energy industry, such as transportation, wellsite preparation contractors and equipment manufacturers.

Loan Modifications, Other Real Estate Owned and Repossessed Assets and Held for Sale Assets

The following is a summary of other real estate owned and repossessed assets:

	December 31,
	2023		2022
	(Dollars in thousands)
Other real estate owned and repossessed assets	$	34,200	$	36,936

As of both December 31, 2023 and December 31, 2022, other real estate owned included a larger commercial real estate property recorded at $29.4 million. Rental income for this property is included in other noninterest income on the consolidated statements of comprehensive income. Operating expense for this property is included in net expense from other real estate owned in other noninterest expense on the consolidated statements of comprehensive income.

This property had the following rental income and operating expenses for the periods presented.

	For the Twelve Months Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Rental income	$	11,224	$	10,340	$	9,975
Operating expense		10,868		9,863		8,727

During 2023, the Company sold property held in other real estate owned for a total gain of $728,000 compared to gains of $4.2 million in 2022 and $618,000 in 2021.

During 2023, the Company wrote down property held in other real estate owned for a total of $5.2 million compared to write downs of $3.7 million in 2022 and $538,000 in 2021.

The Company charges interest on principal balances outstanding on modified loans during deferral periods. The current and future financial effects of the recorded balance of loans considered to be modified during the period were not considered to be material. The recorded balance of modified loans was approximately $5.3 million during the year ended December 31, 2023.

Nonaccrual loans

The Company did not recognize any interest income on nonaccrual loans for any of the years ended December 31, 2023, 2022 or 2021. In addition, there were no nonaccrual loans for which there is no related allowance for credit losses at both December 31, 2023 and December 31, 2022. Had nonaccrual loans performed in accordance with their original contractual terms, the Company would have recognized additional interest income of $1.6 million in 2023, $1.3 million in 2022 and $2.2 million in 2021.

Nonaccrual loans guaranteed by government agencies totaled $6.7 million at December 31, 2023 and $4.7 million at December 31, 2022.

The following table is a summary of amounts included in nonaccrual loans, segregated by portfolio segment.

	December 31, 2023		December 31, 2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	1,686	$	1,795
Commercial real estate non-owner occupied		874		667
Construction and development < 60 months		800		93
Construction residential real estate < 60 months		638		430
Residential real estate first lien		3,336		1,947
Residential real estate all other		899		55
Agriculture		3,662		2,734
Commercial non-real estate		10,101		7,066
Consumer non-real estate		449		192
Oil and gas		2,128		320
Total	$	24,573	$	15,299

Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. The following table presents an age analysis of the Company's loans held for investment:

	Age Analysis of Past Due Loans
	30-59 Days Past Due		60-89 Days Past Due		90 Days and Greater		Total Past Due Loans		Current Loans		Total Loans		Accruing Loans 90 Days or More Past Due
	(Dollars in thousands)
December 31, 2023
Real estate:
Commercial real estate owner    occupied	$	1,386	$	26	$	5,598	$	7,010	$	953,934	$	960,944	$	4,377
Commercial real estate non-owner    occupied		2,224		7,371		1,786		11,381		1,475,039		1,486,420		913
Construction and development <60    months		198		158		800		1,156		641,487		642,643		—
Construction residential real estate    < 60 months		1,542		206		405		2,153		281,333		283,486		332
Residential real estate first lien		3,879		1,204		1,849		6,932		1,251,812		1,258,744		731
Residential real estate all other		757		190		613		1,560		243,136		244,696		549
Agriculture		1,694		724		1,227		3,645		423,494		427,139		579
Commercial non-real estate		1,501		436		10,028		11,965		1,277,487		1,289,452		1,714
Consumer non-real estate		3,248		1,090		594		4,932		471,535		476,467		347
Oil and gas		—		—		92		92		586,562		586,654		—
Total	$	16,429	$	11,405	$	22,992	$	50,826	$	7,605,819	$	7,656,645	$	9,542
	30-59 Days Past Due		60-89 Days Past Due		90 Days and Greater		Total Past Due Loans		Current Loans		Total Loans		Accruing Loans 90 Days or More Past Due
	(Dollars in thousands)
December 31, 2022
Real estate:
Commercial real estate owner    occupied	$	1,314	$	1,524	$	4,580	$	7,418	$	901,076	$	908,494	$	4,580
Commercial real estate non-owner    occupied		6,237		—		42		6,279		1,376,871		1,383,150		43
Construction and development <60    months		535		40		114		689		474,547		475,236		81
Construction residential real estate    < 60 months		1,320		282		148		1,750		301,555		303,305		—
Residential real estate first lien		3,415		1,076		844		5,335		1,112,564		1,117,899		349
Residential real estate all other		265		37		185		487		195,711		196,198		166
Agriculture		2,357		34		2,265		4,656		403,381		408,037		1,054
Commercial non-real estate		2,490		2,142		2,772		7,404		1,234,050		1,241,454		345
Consumer non-real estate		2,591		648		585		3,824		442,932		446,756		467
Oil and gas		654		—		—		654		462,380		463,034		—
Total	$	21,178	$	5,783	$	11,535	$	38,496	$	6,905,067	$	6,943,563	$	7,085

Credit Quality Indicators

The Company considers credit quality indicators to monitor the credit risk in the loan portfolio including volume and severity of loan delinquencies, nonaccrual loans, internal grading of loans, historical credit loss experience and economic conditions. These indicators are reviewed and updated regularly throughout the year. An internal risk grading system is used to indicate the credit risk of loans. The loan grades used by the Company are for internal risk identification purposes and do not directly correlate to regulatory classification categories or any financial reporting definitions.

The general characteristics of the risk grades are as follows:

Grade 1 – Acceptable - Loans graded 1 represent reasonable and satisfactory credit risk which requires normal attention and supervision. Capacity to repay through primary and/or secondary sources is not questioned.

Grade 2 – Acceptable - Increased Attention - This category consists of loans that have credit characteristics deserving management’s close attention. These complexities or potential weaknesses could result in deterioration of the repayment prospects for the loan or the Company's credit position at some future date. Such credit characteristics include loans to highly leveraged borrowers in cyclical industries, adverse financial trends which could potentially weaken repayment capacity, loans that have fundamental structure complexity or deficiencies, loans lacking secondary sources of repayment where prudent, and loans with deficiencies in essential documentation, including financial information.

Grade 3 – Loans with Problem Potential - This category consists of performing loans which are considered to exhibit problem potential. Loans in this category would generally include, but not be limited to, borrowers with a weakened financial condition or poor performance history, past dues, loans restructured to reduce payments to an amount that is below market standards and/or loans with severe documentation problems. In general, these loans have no identifiable loss potential in the near future; however, the possibility of a loss developing is heightened.

Grade 4 - Problem Loans/Assets – Nonperforming - This category consists of nonperforming loans/assets which are considered to be problems. Nonperforming loans are described as being 90 days and over past due and still accruing, and loans that are nonaccrual. The government guaranteed portion of SBA loans is excluded.

Grade 5 - Loss Potential - This category consists of loans/assets which are considered to possess loss potential. While the loss may not occur in the current year, management expects that loans/assets in this category will ultimately result in a loss, unless substantial improvement occurs.

Grade 6 - Charge Off - This category consists of loans that are considered uncollectible and other assets with little or no value.

The Company’s revolving loans that are converted to term loans are not material and therefore have not been presented.

The following tables summarizes the Company's gross loans held for investment by year of origination and internally assigned credit grades:

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
	(Dollars in thousands)
December 31, 2023
Commercial real estate owner occupied
Grade 1	$	125,041	$	144,429	$	124,113	$	85,619	$	77,400	$	135,064	$	23,004	$	714,670
Grade 2		39,735		61,879		28,506		22,473		19,617		24,199		33,304		229,713
Grade 3		140		3,580		4,262		644		1,432		1,051		2,450		13,559
Grade 4		399		90		—		352		656		1,016		150		2,663
Grade 5		—		—		—		—		339		—		—		339
Total commercial real estate owner occupied		165,315		209,978		156,881		109,088		99,444		161,330		58,908		960,944
Commercial real estate non-owner occupied
Grade 1		221,014		271,637		172,291		113,676		56,831		68,576		44,878		948,903
Grade 2		82,206		139,982		79,204		53,154		63,331		72,075		28,844		518,796
Grade 3		2,135		6,666		1,715		—		6,207		251		—		16,974
Grade 4		200		632		349		—		—		566		—		1,747
Total commercial real estate non-owner occupied		305,555		418,917		253,559		166,830		126,369		141,468		73,722		1,486,420
Construction and development < 60 months
Grade 1		124,218		133,254		65,472		5,828		3,392		5,019		76,831		414,014
Grade 2		95,138		43,884		28,772		6,625		13,406		2,146		34,559		224,530
Grade 3		2,051		893		101		235		—		19		—		3,299
Grade 4		—		800		—		—		—		—		—		800
Total construction and development < 60 months		221,407		178,831		94,345		12,688		16,798		7,184		111,390		642,643
Construction residential real estate < 60 months
Grade 1		158,161		7,551		1,421		100		105		467		49,284		217,089
Grade 2		57,172		2,365		27		12		—		—		98		59,674
Grade 3		5,457		387		—		—		—		—		—		5,844
Grade 4		673		206		—		—		—		—		—		879
Total construction residential real estate <60 months		221,463		10,509		1,448		112		105		467		49,382		283,486
Residential real estate first lien
Grade 1		294,363		226,557		174,325		115,055		71,941		149,836		6,047		1,038,124
Grade 2		51,619		39,146		35,226		24,738		12,591		39,264		—		202,584
Grade 3		2,175		2,187		2,630		773		1,140		4,009		—		12,914
Grade 4		759		122		1,144		651		355		2,091		—		5,122
Total residential real estate first lien		348,916		268,012		213,325		141,217		86,027		195,200		6,047		1,258,744
Residential real estate all other
Grade 1		44,475		24,861		8,381		8,122		3,753		12,827		46,479		148,898
Grade 2		4,244		5,819		1,415		1,652		1,308		2,527		74,388		91,353
Grade 3		355		262		198		40		23		391		1,942		3,211
Grade 4		119		24		—		—		55		89		947		1,234
Total residential real estate all other		49,193		30,966		9,994		9,814		5,139		15,834		123,756		244,696
Agriculture
Grade 1		52,934		51,099		34,840		26,603		17,863		33,052		46,981		263,372
Grade 2		28,829		20,931		18,245		9,826		8,207		15,833		41,018		142,889
Grade 3		9,516		1,185		789		2,570		296		2,372		2,454		19,182
Grade 4		265		633		55		131		370		241		1		1,696
Total agriculture		91,544		73,848		53,929		39,130		26,736		51,498		90,454		427,139
Commercial non-real estate
Grade 1		252,112		176,013		159,470		39,097		36,907		33,824		277,740		975,163
Grade 2		95,590		35,955		19,519		6,591		6,456		8,071		127,800		299,982
Grade 3		2,206		2,598		1,011		109		121		164		1,779		7,988
Grade 4		1,181		1,691		400		686		309		154		1,425		5,846
Grade 5		—		—		—		—		473		—		—		473
Total commercial non-real estate		351,089		216,257		180,400		46,483		44,266		42,213		408,744		1,289,452
Consumer non-real estate
Grade 1		211,028		105,365		55,079		18,529		8,939		3,301		22,184		424,425
Grade 2		19,085		14,919		6,764		2,062		702		910		2,085		46,527
Grade 3		941		1,424		932		326		299		156		11		4,089
Grade 4		361		452		409		117		72		10		5		1,426
Total consumer non-real estate		231,415		122,160		63,184		21,034		10,012		4,377		24,285		476,467
Oil and gas
Grade 1		147,902		29,658		72,127		13,898		1,553		15,015		180,321		460,474
Grade 2		66,080		4,851		1,019		402		279		177		50,201		123,009
Grade 3		1,758		132		225		—		—		—		323		2,438
Grade 4		313		83		166		—		10		161		—		733
Total oil and gas		216,053		34,724		73,537		14,300		1,842		15,353		230,845		586,654
Total loans held for investment	$	2,201,950	$	1,564,202	$	1,100,602	$	560,696	$	416,738	$	634,924	$	1,177,533	$	7,656,645

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
	2022		2021		2020		2019		2018		Prior		Amortized Cost Basis		Total
	(Dollars in thousands)
December 31, 2022
Commercial real estate owner occupied
Grade 1	$	173,596	$	145,425	$	106,285	$	91,892	$	44,086	$	119,755	$	53,026	$	734,065
Grade 2		34,774		34,283		27,153		17,999		8,528		29,638		14,737		167,112
Grade 3		235		1,718		387		1,334		332		1,161		62		5,229
Grade 4		40		269		—		1,110		180		489		—		2,088
Total commercial real estate owner occupied		208,645		181,695		133,825		112,335		53,126		151,043		67,825		908,494
Commercial real estate non-owner occupied
Grade 1		349,333		239,369		170,186		107,983		24,075		66,546		45,372		1,002,864
Grade 2		115,372		50,573		29,031		46,870		24,877		69,601		31,928		368,252
Grade 3		7,677		—		153		2,733		64		1,318		—		11,945
Grade 4		—		—		—		—		42		47		—		89
Total commercial real estate non-owner occupied		472,382		289,942		199,370		157,586		49,058		137,512		77,300		1,383,150
Construction and development < 60 months
Grade 1		164,865		92,595		39,819		5,558		3,146		4,993		40,474		351,450
Grade 2		36,090		20,273		1,413		14,248		1,648		774		47,973		122,419
Grade 3		967		—		141		—		—		8		158		1,274
Grade 4		—		—		33		47		—		13		—		93
Total construction and development < 60 months		201,922		112,868		41,406		19,853		4,794		5,788		88,605		475,236
Construction residential real estate < 60 months
Grade 1		209,699		12,612		259		18		—		42		36,114		258,744
Grade 2		39,174		1,152		102		—		—		400		2,091		42,919
Grade 3		1,212		—		—		—		—		—		—		1,212
Grade 4		420		10		—		—		—		—		—		430
Total construction residential real estate < 60 months		250,505		13,774		361		18		—		442		38,205		303,305
Residential real estate first lien
Grade 1		303,369		205,377		141,752		85,850		55,631		136,776		4,242		932,997
Grade 2		46,751		36,453		25,623		13,414		11,687		37,167		—		171,095
Grade 3		1,940		1,903		1,065		1,689		497		3,826		—		10,920
Grade 4		55		311		175		386		144		1,816		—		2,887
Total residential real estate first lien		352,115		244,044		168,615		101,339		67,959		179,585		4,242		1,117,899
Residential real estate all other
Grade 1		31,741		11,012		10,696		5,458		3,607		11,198		41,653		115,365
Grade 2		5,683		1,887		1,744		1,589		1,237		2,574		62,395		77,109
Grade 3		381		186		71		50		201		786		1,828		3,503
Grade 4		—		18		28		32		39		53		51		221
Total residential real estate all other		37,805		13,103		12,539		7,129		5,084		14,611		105,927		196,198
Agriculture
Grade 1		73,722		44,037		35,684		22,094		12,064		31,517		42,542		261,660
Grade 2		28,351		22,773		9,638		10,548		6,025		15,233		33,844		126,412
Grade 3		6,435		476		3,427		140		320		2,703		4,452		17,953
Grade 4		660		221		498		80		144		393		16		2,012
Total agriculture		109,168		67,507		49,247		32,862		18,553		49,846		80,854		408,037
Commercial non-real estate
Grade 1		282,252		205,516		67,229		50,725		13,780		40,989		280,774		941,265
Grade 2		88,017		46,604		17,420		11,447		15,628		3,582		105,783		288,481
Grade 3		2,093		461		346		738		1,566		180		2,544		7,928
Grade 4		240		415		656		745		348		929		183		3,516
Grade 5		—		—		—		264		—		—		—		264
Total commercial non-real estate		372,602		252,996		85,651		63,919		31,322		45,680		389,284		1,241,454
Consumer non-real estate
Grade 1		203,238		104,380		39,779		21,035		6,589		2,187		26,263		403,471
Grade 2		21,011		10,538		3,978		1,541		822		1,340		825		40,055
Grade 3		827		671		405		282		134		63		4		2,386
Grade 4		229		351		54		141		56		13		—		844
Total consumer non-real estate		225,305		115,940		44,216		22,999		7,601		3,603		27,092		446,756
Oil and gas
Grade 1		24,303		125,209		16,482		682		1,678		880		199,995		369,229
Grade 2		7,610		10,668		766		23,040		3,167		327		45,240		90,818
Grade 3		2,117		47		5		—		—		—		498		2,667
Grade 4		—		320		—		—		—		—		—		320
Total oil and gas		34,030		136,244		17,253		23,722		4,845		1,207		245,733		463,034
Total loans held for investment	$	2,264,479	$	1,428,113	$	752,483	$	541,762	$	242,342	$	589,317	$	1,125,067	$	6,943,563

The following tables summarize the Company’s gross charge-offs by year of origination for the periods indicated:

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
	(Dollars in thousands)
Year ended December 31, 2023
Commercial real estate owner occupied
Current-period gross charge-offs	$	174	$	196	$	26	$	203	$	165	$	158	$	—	$	922
Commercial real estate non-owner occupied
Current-period gross charge-offs		—		—		—		—		—		3		—		3
Construction and development < 60 months
Current-period gross charge-offs		—		3		—		2		—		1		—		6
Construction residential real estate < 60 months
Current-period gross charge-offs		—		94		—		—		—		—		—		94
Residential real estate first lien
Current-period gross charge-offs		—		—		91		44		5		25		—		165
Residential real estate all other
Current-period gross charge-offs		—		4		19		—		1		36		—		60
Agriculture
Current-period gross charge-offs		—		154		9		317		14		2		—		496
Commercial non-real estate
Current-period gross charge-offs		390		351		111		22		51		160		—		1,085
Consumer non-real estate
Current-period gross charge-offs		312		632		261		45		41		40		19		1,350
Oil and gas
Current-period gross charge-offs		57		2		—		—		—		—		—		59
Total current-period gross charge-offs	$	933	$	1,436	$	517	$	633	$	277	$	425	$	19	$	4,240

Allowance for Credit Losses Methodology

The Company determines its provision for credit losses and allowance for credit losses using the current expected credit loss methodology that is referred to as the current expected credit loss ("CECL") model. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist.

The Company elected to utilize a methodology known as vintage loss analysis for BancFirst, Pegasus, and Worthington. Vintage loss analysis measures impairment based on the age of the accounts and the historical asset performance of assets with similar risk characteristics. Vintage loss analysis determines expected losses by allowing the Company to calculate the cumulative loss rates of a given loan pool and in so doing, determine the loan pool’s lifetime expected loss experience relative to the appropriate type of financial assets that share similar risk characteristics. Vintage loss analysis uses different “vintages” analyzed by year of origination through the weighted average maturity of each loan pool. The key quantitative inputs used in the Company’s estimate of the allowance for credit losses include 1) all available loan data tracked by year of origination, 2) total charge-offs for each specific loan pool recorded since year of origination, 3) recovery rate calculated by the average recovery over the previous seven years across all loan pools, and 4) a weighting factor biased to more recent loss experience. The quantitative expected credit loss is calculated by dividing each year’s net charge-offs by the original balance. The respective vintage’s original balance remains the denominator in each annual calculation, as it references the specific vintage’s initial balance. The loss experience of this original balance is tracked annually and summed over the life of the loan for each separate loan pool, leaving a cumulative life of credit loss rate based on historic averages weighted towards more recent loss experience. These key quantitative inputs change from period to period as new loans are originated, and charge-offs and recoveries are recognized. The recovery rate is revised on an annual basis, taking into consideration the most recent seven years. The weighting factor percentages remain static, however, the most recent year receives the highest weighting percentage.

The BancFirst Senior Loan Committee (“the SLC”) sets BancFirst qualitative adjustments. In setting the qualitative adjustments, they consider several factors, including external economic information, peer bank comparisons and experience with the loan portfolio. The SLC also considers Moody’s Analytics dataset. From this dataset, BancFirst selects a range of 4 probability scenarios from two economic forecasts. To determine the appropriate correlation to our loss experience, BancFirst compares the economic indicators over

the past ten years of charge-off history to arrive at a correlation factor. BancFirst then applies the correlation factor to the change in the forecast of the aforementioned economic indicators over the next 18-24 months, which is driven by management’s judgment of a reasonable and supportable forecast period to arrive at a percentage range of qualitative loss adjustment attributable to economic forecasts. The SLC establishes a qualitative adjustment for each loan pool using these factors. For periods beyond which BancFirst is able to make or obtain reasonable and supportable forecasts of expected credit losses, BancFirst reverts to historical loss information.

In some cases, management may determine a loan to be collateral dependent. A loan is considered collateral-dependent when the repayment is expected to be provided substantially through the operation or sale of the collateral when the borrower is experiencing financial difficulty based on the Company's assessment as of the reporting date. For collateral dependent loans, the standard allows institutions to use, as a practical expedient, the fair value of the collateral to measure expected credit losses on collateral-dependent financial assets. This amount is included in the allowance for credit losses.

The increase in allowance for credit losses during 2023 was related to loan growth during the year. The increase in allowance for credit losses during 2022 was related to the purchase of loans without credit deterioration during the year along with loan growth.

The following table details activity in the allowance for credit losses on loans for the period presented. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

	Allowance for Credit Losses
	Balance at beginning of period		Charge- offs			Recoveries		Net charge-offs			Provision for/(benefit from) credit losses on loans			Balance at end of period
	(Dollars in thousands)
Year ended December 31, 2023
Real estate:
Commercial real estate owner occupied	$	6,416	$	(922	)	$	68	$	(854	)	$	1,921		$	7,483
Commercial real estate non-owner occupied		30,190		(3	)		—		(3	)		2,893			33,080
Construction and development < 60 months		3,778		(6	)		11		5			167			3,950
Construction residential real estate < 60 months		3,275		(94	)		—		(94	)		233			3,414
Residential real estate first lien		4,092		(165	)		15		(150	)		972			4,914
Residential real estate all other		1,418		(60	)		5		(55	)		283			1,646
Agriculture		6,217		(496	)		127		(369	)		289			6,137
Commercial non-real estate		25,106		(1,085	)		446		(639	)		(1,722	)		22,745
Consumer non-real estate		4,132		(1,350	)		182		(1,168	)		1,437			4,401
Oil and gas		8,104		(59	)		—		(59	)		985			9,030
Total	$	92,728	$	(4,240	)	$	854	$	(3,386	)	$	7,458		$	96,800

	Allowance for Credit Losses
	Balance at beginning of period		Initial allowance on loans purchased with credit deterioration		Charge- offs			Recoveries		Net charge-offs			Provision for/(benefit from) credit losses on loans			Balance at end of period
	(Dollars in thousands)
Year ended December 31, 2022
Real estate:
Commercial real estate owner occupied	$	7,550	$	—	$	(20	)	$	507	$	487		$	(1,621	)	$	6,416
Commercial real estate non-owner occupied		16,807		—		—			—		—			13,383			30,190
Construction and development < 60 months		3,454		—		(93	)		12		(81	)		405			3,778
Construction residential real estate    < 60 months		1,051		—		—			—		—			2,224			3,275
Residential real estate first lien		3,048		2		(106	)		87		(19	)		1,061			4,092
Residential real estate all other		1,567		—		(38	)		405		367			(516	)		1,418
Agriculture		8,392		—		(205	)		13		(192	)		(1,983	)		6,217
Commercial non-real estate		25,565		44		(1,551	)		209		(1,342	)		839			25,106
Consumer non-real estate		3,694		25		(768	)		193		(575	)		988			4,132
Oil and gas		12,808		—		—			—		—			(4,704	)		8,104
Total	$	83,936	$	71	$	(2,781	)	$	1,426	$	(1,355	)	$	10,076		$	92,728

Purchased Credit Deteriorated Loans

The Company has purchased loans, for which there was, at acquisition, evidence of more than insignificant deterioration of credit quality since origination. The Company did not purchase credit-deteriorated loans during the year ended December 31, 2023. The credit-deteriorated loans purchased during the year ended December 31, 2022 were as follows:

	Loans acquired with deteriorated credit quality
	(Dollars in thousands)
For the year ended December 31, 2022
Purchase price of loans at acquisition	$	668
Allowance for credit losses at acquisition		71
Par value of acquired loans at acquisition	$	739

Collateral Dependent Loans

A loan is considered collateral-dependent when the borrower is experiencing financial difficulty and repayment is expected to be provided substantially through the operation or sale of the collateral. During the years ended December 31, 2023 and 2022, no material amount of interest income was recognized on collateral-dependent loans subsequent to their classification as collateral-dependent. The following table summarizes collateral-dependent gross loans held for investment by collateral type and the related specific allocation as follows:

	Collateral Type
	Real Estate		Business Assets		Energy Reserves		Other Assets		Total		Specific Allocation
As of December 31, 2023	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate non-owner occupied		632		—		—		—		632		250
Construction and development < 60 months		800		—		—		—		800		225
Construction residential real estate < 60 months		638		—		—		—		638		134
Residential real estate first lien		189		—		—		—		189		62
Residential real estate all other		140		—		—		—		140		140
Agriculture		1,841		593		—		15		2,449		1,386
Commercial non-real estate		—		6,090		—		241		6,331		1,867
Consumer non-real estate		—		—		—		147		147		88
Oil and gas		—		—		—		—		—		—
Total collateral-dependent loans held for investment	$	4,240	$	6,683	$	—	$	403	$	11,326	$	4,152
	Collateral Type
	Real Estate		Business Assets		Energy Reserves		Other Assets		Total		Specific Allocation
As of December 31, 2022	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	2,213	$	—	$	—	$	—	$	2,213	$	870
Commercial real estate non-owner occupied		1,263		—		—		—		1,263		333
Construction and development < 60 months		—		—		—		—		—		—
Construction residential real estate < 60 months		420		—		—		—		420		45
Residential real estate first lien		481		—		—		—		481		207
Residential real estate all other		9		—		—		—		9		9
Agriculture		3,447		701		—		3,592		7,740		3,114
Commercial non-real estate		—		5,924		—		4		5,928		1,938
Consumer non-real estate		—		—		—		117		117		81
Oil and gas		—		—		—		—		—		—
Total collateral-dependent loans held for investment	$	7,833	$	6,625	$	—	$	3,713	$	18,171	$	6,597

Non-Cash Transfers from Loans and Premises and Equipment

Transfers from loans and premises and equipment to other real estate owned, repossessed assets, and other assets are non-cash transactions, and are not included in the consolidated statements of cash flow.

Transfers from loans and premises and equipment to other real estate owned, repossessed assets, and other assets during the periods presented are summarized as follows:

	Year ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Other real estate owned	$	3,459	$	2,563	$	12,651
Repossessed assets		2,019		1,040		844
Other assets		—		1,943		—
Total	$	5,478	$	5,546	$	13,495

Related Party Loans

The Company has made loans in the ordinary course of business to the executive officers and directors of the Company and to certain affiliates of these executive officers and directors. Management believes that all such loans were made on substantially the same terms as those prevailing at the time for comparable transactions with other persons and do not represent more than a normal risk of collectability or present other unfavorable features. A summary of these loans is as follows:

Year Ended December 31,	Balance Beginning of the Period		Additions		Collections/ Terminations			Balance End of the Period
	(Dollars in thousands)
2023	$	23,167	$	106,819	$	(45,722	)	$	84,264
2022		28,292		46,124		(51,249	)		23,167
2021		22,057		31,574		(25,339	)		28,292

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Premises and Equipment, Net and Other Assets

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Premises and Equipment, Net and Other Assets

(6) PREMISES AND EQUIPMENT, NET AND OTHER ASSETS

The following is a summary of premises and equipment by classification:

		December 31,
	Estimated Useful Lives	2023			2022
		(Dollars in thousands)
Land		$	49,173		$	47,856
Buildings	10 to 40 years		288,391			266,660
Furniture, fixtures and equipment	3 to 15 years		94,851			91,340
Construction in progress			4,213			16,613
Accumulated depreciation			(158,034	)		(144,381	)
Premises and equipment, net		$	278,594		$	278,088

Non-cash items in Premises and Equipment, Net

The Company had $195,000 in construction in progress for retainage payable at December 31, 2023 and $1.1 million at December 31, 2022. Retainage payable is not remitted to the vendor until completion of the project and is therefore not included in the consolidated statements of cash flow.

Construction in Progress

Construction in progress included in the table above is primarily related to the renovation of BancFirst Tower, which began in 2018. When renovations on the building are completed, the asset is reclassified as buildings and depreciated over its applicable useful life.

Other Assets

Other assets includes the cash surrender value of key-man life insurance policies totaling $84.4 million at December 31, 2023 and $82.7 million at December 31, 2022.

Equity securities are reported in other assets on the consolidated balance sheet. The Company invests in equity securities without readily determinable fair values. These equity securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income. The balance of equity securities was $13.1 million at December 31, 2023 and $15.5 million at December 31, 2022.

The balance of other assets included an equity interest of a former borrower in the oil and gas industry, which was received through bankruptcy proceedings, with a value of $21.4 million at December 31, 2022. This equity interest was sold during the second quarter of 2023 resulting in a zero balance at December 31, 2023. Under the equity method, the carrying value of a bank’s investment in an investee is originally recorded at cost but is adjusted periodically to record as income the bank’s proportionate share of the investee’s earnings or losses and decreased by the amount of cash dividends or similar distributions received from the investee.

Low Income Housing Tax Credit Investments

The Company invests in affordable housing projects that qualify for the low-income housing tax credit (LIHTC), which is designed to promote private development of low-income housing. These investments generate a return primarily through realization of federal tax credits, and also through a tax deduction generated by operating losses of the investments. The investments are amortized through tax expense using the proportional amortization method as related tax credits are utilized. The Company is periodically required to provide additional contributions at the discretion of the project sponsors. Although in some cases the Company’s investment may exceed 50% of the equity interest in an entity, the Company does not consolidate these structures as variable interest entities due to the project sponsor’s ability to manage the projects, which is indicative of power over them.

Total LIHTC investments were $46.4 million and $24.7 million at December 31, 2023 and 2022, respectively and are included in other assets on the consolidated balance sheet. The Company recognized tax credits and other tax benefits of $7.3 million, $6.4 million and $6.5 million in 2023, 2022 and 2021, respectively and amortization expense of $5.6 million, $5.1 million and $5.5 million in 2023, 2022 and 2021, respectively resulting from LIHTC investments. Additional contributions are committed during the investment periods through the year 2035. Unfunded commitments to these investments as of December 31, 2023 totaled $26.8 million.

New Market Tax Credit Investments

The Company also invests in active low-income community businesses that qualify for New Market Tax Credits (NMTC). NMTC investments are made through Community Development Entities (CDEs) and such entities are qualified through the US Department of the Treasury. NMTCs are earned for a qualified entity investment made by a taxpayer in a CDE if substantially all of the investment is used by the CDE to make qualified investments. It is through its equity contributions into the CDE entities that the Company is able to receive the benefits of the NMTCs. The amount of the NMTC is equal to 39% of the qualified investment taken over a seven year period. The investments are amortized through tax expense using the proportional amortization method as related tax credits are utilized. The Company does not consolidate these CDEs as variable interest entities due to the control the allocatee of the tax credits has over the entity.

Total NMTC investments were $12.1 million and $11.3 million at December 31, 2023 and 2022, respectively, and are included in other assets on the consolidated balance sheet. The Company recognized tax credits of $5.6 million, $4.7 million and $4.0 million in 2023, 2022 and 2021, respectively and amortization expense of $4.6 million, $3.9 million, and $3.3 million in 2023, 2022 and 2021, respectively resulting from NMTC investments. NMTC investments are funded in full in the year they begin. There are no unfunded commitments.

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Intangible Assets and Goodwill

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets and Goodwill

(7) INTANGIBLE ASSETS AND GOODWILL

The following is a summary of intangible assets:

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Dollars in thousands)
As of December 31, 2023
Core deposit intangibles	$	33,550	$	(17,027	)	$	16,523
Customer relationship intangibles		3,350		(3,169	)		181
Total	$	36,900	$	(20,196	)	$	16,704
As of December 31, 2022
Core deposit intangibles	$	33,298	$	(13,615	)	$	19,683
Customer relationship intangibles		3,350		(3,050	)		300
Total	$	36,648	$	(16,665	)	$	19,983

Estimated amortization of intangible assets for the next five years, as of December 31, 2023, is as follows (dollars in thousands):

Estimated Amortization
2024	$	3,474
2025		3,249
2026		2,645
2027		2,641
2028		1,821

At December 31, 2023, the weighted-average remaining life of all intangible assets was approximately 5.8 years, which consisted of customer relationship intangibles with a weighted-average life of 1.6 years and core deposit intangibles with a weighted-average life of 5.9 years.

The following is a summary of goodwill by business segment:

	BancFirst Metropolitan Banks		BancFirst Community Banks		Pegasus		Worthington		Other Financial Services		Executive, Operations & Support		Consolidated
	(Dollars in thousands)
Year Ended December 31, 2023
Balance at beginning of period	$	13,767	$	61,212	$	68,855	$	32,133	$	5,464	$	624	$	182,055
Acquisitions		—		208		—		—		—		—		208
Balance at end of period	$	13,767	$	61,420	$	68,855	$	32,133	$	5,464	$	624	$	182,263
Year Ended December 31, 2022
Balance at beginning of period	$	13,767	$	61,212	$	68,855	$	—	$	5,464	$	624	$	149,922
Acquisitions		—		—		—		32,133		—		—		32,133
Balance at end of period	$	13,767	$	61,212	$	68,855	$	32,133	$	5,464	$	624	$	182,055

The Company purchased a branch from RCB Bank on July 20, 2023, which added goodwill as shown in the table above. The Company acquired Worthington on February 8, 2022, which added core deposit intangibles and goodwill shown in the tables above. See Note (2) of the Notes to Consolidated Financial Statements for disclosure regarding the Company’s recent developments, including mergers and acquisitions.

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Deposits

12 Months Ended

Dec. 31, 2023

Deposits [Abstract]

Deposits

(8) DEPOSITS

Year-end deposits were as follows:

	December 31,
	2023		2022
	(Dollars in thousands)
Noninterest-bearing demand deposits	$	3,982,226	$	4,944,730
Money market and interest-bearing checking deposits		4,699,865		4,173,268
Savings deposits		1,056,404		1,143,176
Time deposits		961,627		713,054
Total deposits	$	10,700,122	$	10,974,228

The aggregate amount of overdrawn customer transaction deposits that have been reclassified as loan balances was $6.2 million at December 31, 2023 and $4.4 million at December 31, 2022.

Time deposits include certificates of deposit and individual retirement accounts. At December 31, 2023, the scheduled maturities of all time deposits are as follows (Dollars in thousands):

2024	$	774,008
2025		120,976
2026		27,347
2027		17,093
2028		22,199
Thereafter		4
Total	$	961,627

The following table is a summary of time deposits that meet or exceed the current Federal Deposit Insurance Corporation ("FDIC") insurance limit for the periods presented:

	December 31,
	2023		2022
	(Dollars in thousands)
Time deposits of $250,000 or more	$	299,018	$	224,517

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Short-Term Borrowings

12 Months Ended

Dec. 31, 2023

Short-Term Debt [Abstract]

Short-Term Borrowings

(9) SHORT-TERM BORROWINGS

The following is a summary of short-term borrowings:

	December 31,
	2023			2022
	(Dollars in thousands)
Federal funds purchased	$	2,525		$	300
Repurchase agreements		826			—
Total short-term borrowings	$	3,351		$	300
Weighted average interest rate		4.84	%		1.39	%
End of period interest rate		4.06	%		4.30	%

Federal funds purchased represent borrowings of overnight funds from other financial institutions.

The Company enters into sales of securities to certain of its customers with simultaneous agreements to repurchase. These agreements represent an overnight borrowing of funds.

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Line of Credit

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Line of Credit

(10) LINES OF CREDIT

BancFirst has a line of credit from the FHLB of Topeka, Kansas to use for liquidity or to match-fund certain long-term fixed rate loans. BancFirst's assets, including residential first mortgages of $1.1 billion, are pledged as collateral for the borrowings under the line of credit. As of December 31, 2023, BancFirst had the ability to draw up to $793.3 million on the FHLB line of credit based on FHLB stock holdings of $658,300 with no advances outstanding. In addition, BancFirst has a $25.0 million line of credit with another financial institution that is an overnight federal funds facility. As of December 31, 2023, BancFirst had no advances outstanding under either line of credit. Worthington has $10.5 million in lines of credit with other financial institutions that serve as overnight federal funds facilities, a Federal Reserve discount window capacity of $26.3 million, a $75.2 million line of credit from the FHLB of Dallas, Texas to use for liquidity or to match-fund certain long-term fixed rate loans, and a brokered certificate of deposit capacity of $72.1 million. Worthington had no advances outstanding as of December 31, 2023 under any line of credit.

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Subordinated Debt

12 Months Ended

Dec. 31, 2023

Broker-Dealer [Abstract]

Subordinated Debt

(11) SUBORDINATED DEBT

In January 2004, the Company established BFC Capital Trust II (“BFC II”), a trust formed under the Delaware Business Trust Act. The Company owns all of the common securities of BFC II. In February 2004, BFC II issued $25 million of aggregate liquidation amount of 7.20% Cumulative Trust Preferred Securities (the “Cumulative Trust Preferred Securities”) to other investors. In March 2004, BFC II issued an additional $1 million in Cumulative Trust Preferred Securities through the execution of an over-allotment option. The proceeds from the sale of the Cumulative Trust Preferred Securities and the common securities of BFC II were invested in $26.8 million of 7.20% Junior Subordinated Debentures of the Company. Interest payments on the $26.8 million of 7.20% Junior Subordinated Debentures are payable January 15, April 15, July 15 and October 15 of each year. Such interest payments may be deferred for up to twenty consecutive quarters. The stated maturity date of the $26.8 million of 7.20% Junior Subordinated Debentures is March 31, 2034, but they are subject to mandatory redemption pursuant to optional prepayment terms. The Cumulative Trust Preferred Securities represent an undivided interest in the $26.8 million of 7.20% Junior Subordinated Debentures and are guaranteed by the Company. During any deferral period or during any event of default, the Company may not declare or pay any dividends on any of its capital stock. The Cumulative Trust Preferred Securities have been callable at par, in whole or in part, since March 31, 2009.

On June 17, 2021, the Company completed a private placement, under Regulation D of the Securities Act of 1933, of $60 million aggregate principal amount of 3.50% Fixed-to-Floating Rate Subordinated Notes due 2036 (the “Subordinated Notes”) to various institutional accredited investors. The sale of the Subordinated Notes was pursuant to a Subordinated Note Purchase Agreement entered into with each of the investors. The Subordinated Notes have been structured to qualify as Tier 2 capital under bank regulatory guidelines. The net proceeds to the Company from the sale of the Subordinated Notes were $59.15 million after deducting commissions and offering expenses of $850,000. The Company used the proceeds from the sale of the Subordinated Notes for general corporate purposes. The Subordinated Notes will initially bear interest at a fixed rate of 3.50% per annum, from and including June 17, 2021 to but excluding June 30, 2031, payable semi-annually in arrears on June 30 and December 31 of each year, commencing December 31, 2021. Then, from and including June 30, 2031, to but excluding the maturity date, the Subordinated Notes will bear interest at a floating rate equal to the benchmark (initially, three-month term SOFR), reset quarterly, plus a spread of 229 basis points, payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year. The Subordinated Notes mature on June 30, 2036.

The Company may, at its option, beginning with the interest payment date of June 30, 2031, and on any scheduled interest payment date thereafter, redeem the Subordinated Notes, in whole or in part. In addition, the Company may redeem all, but not less than all, of the Subordinated Notes at any time upon the occurrence of a “Tier 2 Capital Event,” a “Tax Event” or an “Investment Company Event” (each as defined in the Subordinated Notes). Any such redemption is subject to obtaining the prior approval of the Board of Governors of the Federal Reserve System (or its designee). The redemption price with respect to any such redemption will be equal to 100% of the principal amount of the Subordinated Note, or portion thereof, to be redeemed, plus accrued but unpaid interest, if any, thereon to, but excluding, the redemption date.

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Income Taxes

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Income Taxes

(12) INCOME TAXES

The components of the Company’s income tax expense (benefit) are as follows:

	Year Ended December 31,
	2023			2022		2021
	(Dollars in thousands)
Current taxes:
Federal	$	53,247		$	39,197	$	28,359
State		7,023			4,813		5,365
Deferred taxes		(2,787	)		322		7,044
Total income taxes	$	57,483		$	44,332	$	40,768

Income tax (benefit) expense applicable to securities transactions approximated $(384,000), $453,000 and $220,000 for the years ended December 31, 2023, 2022 and 2021, respectively.

A reconciliation of tax expense at the federal statutory tax rate applied to income before taxes is presented in the following table. The federal statutory tax rate was 21% in 2023, 2022 and 2021:

	Year Ended December 31,
	2023			2022			2021
	(Dollars in thousands)
Tax expense at the federal statutory tax rate	$	56,689		$	49,861		$	43,764
Increase (decrease) in tax expense from:
Tax-exempt income, net		(343	)		(337	)		(436	)
Modified endowment life contracts		(497	)		(487	)		(501	)
Share based compensation excess tax benefit		(786	)		(2,905	)		(1,643	)
Tax deductible dividends paid on ESOP		(505	)		(481	)		(490	)
State tax expense, net of federal tax benefit		4,945			3,788			4,779
Bargain purchase gain		—			—			(1,007	)
Utilization of tax credits:
New markets tax credits, net of amortization		(777	)		(3,745	)		(3,192	)
Low-income housing tax credits, net of amortization		(1,106	)		(1,024	)		(1,533	)
Other tax credits, net of amortization		(192	)		(91	)		(379	)
Other, net		55			(247	)		1,406
Total tax expense	$	57,483		$	44,332		$	40,768

The net deferred tax asset consisted of the following and is reported in other assets:

	December 31,
	2023			2022
	(Dollars in thousands)
Unrealized net losses on securities	$	15,473		$	22,107
Provision for credit losses		22,782			20,988
Write-downs of other real estate owned		2,522			938
Deferred compensation		2,116			2,142
Stock-based compensation		2,199			1,643
Investments in partnership interests		7,260			6,056
Other		911			1,123
Gross deferred tax assets		53,263			54,997
Intangibles		(5,639	)		(6,346	)
Basis difference related to tax credits		(5,462	)		(4,118	)
Depreciation		(21,833	)		(20,360	)
Prepaid expense deducted		(1,243	)		(1,139	)
Other		(181	)		(283	)
Gross deferred tax liabilities		(34,358	)		(32,246	)
Net deferred tax asset	$	18,905		$	22,751

The Company recognizes accrued interest and penalties related to unrecognized tax benefits, if applicable, in income tax expense. During the years ended December 31, 2023, 2022 and 2021, the Company did not recognize or accrue any interest and penalties related to unrecognized tax benefits. Federal and various state income tax statutes dictate that tax returns filed in any of the previous three reporting periods remain open to examination, which includes tax return years 2020 to 2022. The Company has no open examinations with either the Internal Revenue Service or any state agency.

Management performs an analysis of the Company’s tax position annually and believes it is more likely than not that all of its tax positions will be utilized in future years.

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Stock-Based Compensation

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

(13) STOCK-BASED COMPENSATION

On May 25, 2023, the shareholders of the Company adopted the BancFirst Corporation 2023 Restricted Stock Unit Plan (the "RSU Plan"). The RSU Plan was effective as of June 1, 2023 and for a period of ten years thereafter. The RSU Plan will continue in effect after such ten-year period until all matters relating to the payment of awards and administration of the RSU Plan have been settled. At December 31, 2023 there were 467,925 shares available for future grants. The restricted stock units ("RSU's") vest beginning two years from the date of grant at the rate of 20% per year for five years. The RSUs are settled and distributed as of each vesting date. The fair value of each RSU granted is equal to the market price of the Company’s stock at the date of grant.

The following table is a summary of the activity under the Company's RSU plan.

			Wgtd. Avg.
	Restricted		Grant Date
	Stock Units		Fair Value
Year Ended December 31, 2023
Nonvested at December 31, 2022		—
Granted		32,075	$	87.23
Nonvested at December 31, 2023		32,075

The Company has had the BancFirst Corporation Directors’ Deferred Stock Compensation Plan (the “Deferred Stock Compensation Plan”) since May 1999. As of December 31, 2023, there are 18,186 shares available for future issuance under the Deferred Stock Compensation Plan. The Deferred Stock Compensation Plan will terminate on December 31, 2024, if not extended. Under the plan, directors and members of the community advisory boards of the Company and its subsidiaries may defer up to 100% of their board fees. They are credited for each deferral with a number of stock units based on the current market price of the Company’s stock, which

accumulate in an account until such time as the director or community board member terminates serving as a board member. Shares of common stock of the Company are then distributed to the terminating director or community board member based upon the number of stock units accumulated in his or her account. There were 18,136 and 30,982 shares of common stock distributed from the Deferred Stock Compensation Plan during the years ended December 31, 2023 and 2022, respectively.

A summary of the accumulated stock units is as follows:

	December 31,
	2023		2022
Accumulated stock units		119,575		129,609
Average price	$	40.03	$	34.91

The Company had the BancFirst Corporation Stock Option Plan (the “Employee Plan”), which was terminated on June 1, 2023. The remaining options will continue to vest and are exercisable beginning four years from the date of grant at the rate of 25% per year for four years, and expire no later than the end of fifteen years from the date of grant.

The Company had the BancFirst Corporation Non-Employee Directors’ Stock Option Plan (the “Non-Employee Directors’ Plan”), which was terminated on June 1, 2023. The remaining options will continue to vest and are exercisable beginning one year from the date of grant at the rate of 25% per year for four years, and expire no later than the end of fifteen years from the date of grant.

The following table is a summary of the activity under both the Employee Plan and the Non-Employee Directors’ Plan:

						Wgtd. Avg.
				Wgtd. Avg.		Remaining	Aggregate
				Exercise		Contractual	Intrinsic
	Options			Price		Term	Value
	(Dollars in thousands, except option data)
Year Ended December 31, 2023
Outstanding at December 31, 2022		1,310,290		$	52.51
Options exercised		(60,024	)		34.83
Options canceled, forfeited, or expired		(8,875	)		86.42
Outstanding at December 31, 2023		1,241,391			53.12	9.70Yrs	$	54,882
Exercisable at December 31, 2023		524,016			34.53	6.39Yrs	$	32,908
Year Ended December 31, 2022
Outstanding at December 31, 2021		1,303,250		$	40.90
Options granted		278,500			87.13
Options exercised		(241,460	)		28.06
Options canceled, forfeited, or expired		(30,000	)		66.31
Outstanding at December 31, 2022		1,310,290			52.51	8.73Yrs	$	46,741
Exercisable at December 31, 2022		489,540			30.82	6.80Yrs	$	28,082

The following table has additional information regarding options exercised under both the Employee Plan and the Non-Employee Directors’ Plan:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Total intrinsic value of options exercised	$	3,055	$	14,837	$	9,264
Cash received from options exercised		2,090		6,776		5,015
Tax benefit realized from options exercised		734		3,567		2,360

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model and is based on certain assumptions including risk-free rate of return, dividend yield, stock price volatility and the expected term. The fair value of each option is expensed over its vesting period. The risk-free interest rate is determined by reference to the spot zero-coupon rate for the U.S.

Treasury security with a maturity similar to the expected term of the options. The dividend yield is the expected yield for the expected term. The stock price volatility is estimated from the recent historical volatility of the Company’s stock. The expected term is estimated from the historical option exercise experience. The Company accounts for forfeitures as they occur. No stock options were granted during the year ended December 31, 2023.

The following table shows the assumptions used for computing stock-based compensation expense under the fair value method on options granted during the periods presented:

	Year Ended December 31,
	2022		2021
Weighted average grant-date fair value per share of options granted	$	31.90	$	21.16
Risk-free interest rate	1.75 to 4.17%		1.30 to 1.74%
Dividend yield	2.00%		2.00%
Stock price volatility	34.61 to 35.60%		35.55 to 36.39%
Expected term	10 Yrs		10 Yrs

The Company currently uses newly issued shares for stock option exercises and restricted stock units, but reserves the right to use shares purchased under the Company’s Stock Repurchase Program (the “SRP”) in the future.

Although not required or expected, the Company may settle some options or restricted stock units in cash on a limited basis at the discretion of the Company. During the years ended December 31, 2023 and 2022, the Company had no cash settlements. During the year ended December 31, 2021, the Company had cash settlements for 121,330 shares for a total net cash settlement of options of $5.5 million that did not increase the outstanding shares of the Company.

Stock-based compensation expense is charged to salaries and benefits expense on the Consolidated Statements of Comprehensive Income.

The components of stock-based compensation expense for all share-based compensation plans and related tax benefits are as follows:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Stock-based compensation expense	$	2,999	$	1,941	$	2,133
Tax benefit		721		467		513
Stock-based compensation expense, net of tax	$	2,278	$	1,474	$	1,620

The Company will continue to amortize the unearned stock-based compensation expense over the remaining vesting period of approximately five years for unvested stock options and six years for unvested RSU's. The following table shows the unearned stock-based compensation expense for unvested stock options and unvested RSU's:

	December 31, 2023
	(Dollars in thousands)
Unearned stock-based compensation expense for unvested stock options	$	10,316
Unearned stock-based compensation expense for unvested RSU's		2,672

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Retirement Plans

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Retirement Plans

(14) RETIREMENT PLANS

The Company has two separate retirement plans, the Thrift Plan (“401(k)”) and the Employee Stock Ownership Plan (“ESOP”). These two plans cover all eligible employees, as defined in the plans, of the Company and its subsidiaries. The 401(k) allows employees to defer up to the maximum legal limit of their compensation, of which the Company may match up to 3% of their compensation. In addition, the Company may make discretionary contributions based on employee contributions or eligible compensation to the ESOP, as determined by the Company’s Board of Directors. The ESOP sponsor purchases shares from the open market. These shares are

included in the calculation of the basic earnings per share. Dividends issued on these shares are reinvested into the ESOP. The ESOP is not leveraged. The aggregate amounts of contributions by the Company to the 401(k) and ESOP are shown in the following table:

	December 31,
	2023		2022		2021
	(Dollars in thousands)
401(k) contributions	$	3,410	$	3,011	$	2,856
ESOP contributions		5,747		4,807		4,317
Total contributions	$	9,157	$	7,818	$	7,173

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Stockholders' Equity

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Stockholders' Equity

(15) STOCKHOLDERS’ EQUITY

As of December 31, 2023, 2022 and 2021 the Company’s authorized and outstanding preferred and common stock was as follows:

	No. of Shares Authorized at		No. of Shares Outstanding at December 31,						Par Value
Class of Stock	December 31, 2023		2023		2022		2021		Per Share		Dividends	Voting Rights
Senior Preferred		10,000,000		—		—		—	$	1.00	As declared	Voting
10% Cumulative Preferred		900,000		—		—		—		5.00	As declared	Non-voting
Common		40,000,000		32,933,018		32,875,560		32,603,118		1.00	As declared	Voting

The following is a description of the capital stock of the Company:

(a) Senior Preferred Stock: No shares issued or outstanding. Shares may be issued with such voting, dividend, redemption, sinking fund, conversion, exchange, liquidation and other rights as shall be determined by the Company’s Board of Directors, without approval of the stockholders. The Senior Preferred Stock would have a preference over common stock as to payment of dividends, as to the right to distribution of assets upon redemption of such shares or upon liquidation of the Company.

(b) 10% Cumulative Preferred Stock: Redeemable at the Company’s option at $5.00 per share plus accumulated dividends; non-voting; cumulative dividends at the rate of 10% payable semi-annually on January 15 and July 15; no shares issued or outstanding.

(c) Common stock: At December 31, 2023, 2022 and 2021 the shares issued equaled shares outstanding.

The Company has adopted a Stock Repurchase Program (the “SRP”). The SRP may be used as a means to increase earnings per share and return on equity. In addition, the SRP may be used to purchase treasury stock for the exercise of stock options or for distributions under the Deferred Stock Compensation Plan, to provide liquidity for optionees to dispose of stock from exercises of their stock options, and to provide liquidity for stockholders wishing to sell their stock. All shares repurchased under the SRP have been retired and not held as treasury stock. The timing, price and amount of stock repurchases under the SRP may be determined by management and approved by the Company’s Executive Committee.

The following table is a summary of the shares purchased under the program and the shares remaining to be repurchased in the program:

	Year Ended December 31,
	2023		2022		2021
Number of shares repurchased		20,702		—		212,296
Average price of shares repurchased	$	87.88	$	—	$	54.94
Shares remaining to be repurchased		479,784		500,486		500,486

The Company’s ability to pay dividends is dependent upon dividend payments received from BancFirst. Banking regulations limit bank dividends based upon net earnings retained and minimum capital requirements. Dividends in excess of these requirements require regulatory approval. At January 1, 2024, approximately $145.7 million of the equity of BancFirst was available for dividend payments to the Company. During any deferral period or any event of default on the Junior Subordinated Debentures, the Company may not declare or pay any dividends on any of its capital stock.

BancFirst Corporation, BancFirst, Pegasus and Worthington are subject to risk-based capital guidelines issued by the Board of Governors of the Federal Reserve System and the Federal Deposit Insurance Corporation ("FDIC"). These guidelines are used to evaluate capital adequacy and involve both quantitative and qualitative evaluations of BancFirst Corporation’s, BancFirst’s, Pegasus’s and Worthington's assets, liabilities, and certain off-balance-sheet items calculated under regulatory practices. Failure to meet the minimum capital requirements can initiate certain mandatory or discretionary actions by the regulatory agencies that could have a direct material effect on the Company’s consolidated financial statements. The Company believes that as of December 31, 2023, BancFirst Corporation, BancFirst, Pegasus and Worthington met all capital adequacy requirements to which they are subject. The actual and required capital amounts and ratios are shown in the following table:

	Actual					Required For Capital Adequacy Purposes					With Capital Conservation Buffer					To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
	(Dollars in thousands)
As of December 31, 2023:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,467,062		16.90	%	$	694,520		8.00	%	$	911,558		10.50	%	N/A		N/A
BancFirst		1,166,750		15.68	%		595,191		8.00	%		781,189		10.50	%	$	743,989		10.00	%
Pegasus		139,472		16.98	%		65,706		8.00	%		86,239		10.50	%		82,132		10.00	%
Worthington		51,608		12.30	%		33,571		8.00	%		44,061		10.50	%		41,963		10.00	%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,284,966		14.80	%	$	390,668		4.50	%	$	607,705		7.00	%	N/A		N/A
BancFirst		1,061,943		14.27	%		334,795		4.50	%		520,792		7.00	%	$	483,593		6.50	%
Pegasus		130,792		15.92	%		36,959		4.50	%		57,492		7.00	%		53,386		6.50	%
Worthington		47,690		11.36	%		18,883		4.50	%		29,374		7.00	%		27,276		6.50	%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,310,966		15.10	%	$	520,890		6.00	%	$	737,928		8.50	%	N/A		N/A
BancFirst		1,081,943		14.54	%		446,393		6.00	%		632,391		8.50	%	$	595,191		8.00	%
Pegasus		130,792		15.92	%		49,279		6.00	%		69,812		8.50	%		65,706		8.00	%
Worthington		47,690		11.36	%		25,178		6.00	%		35,669		8.50	%		33,571		8.00	%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	1,310,966		10.76	%	$	487,279		4.00	%	N/A		N/A			N/A		N/A
BancFirst		1,081,943		10.43	%		414,882		4.00	%	N/A		N/A			$	518,603		5.00	%
Pegasus		130,792		10.56	%		49,529		4.00	%	N/A		N/A				61,911		5.00	%
Worthington		47,690		8.62	%		22,140		4.00	%	N/A		N/A				27,675		5.00	%
As of December 31, 2022:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,298,329		16.61	%	$	625,387		8.00	%	$	820,821		10.50	%	N/A		N/A
BancFirst		1,092,098		16.68	%		523,932		8.00	%		687,661		10.50	%	$	654,916		10.00	%
Pegasus		117,445		12.91	%		77,802		8.00	%		95,553		10.50	%		91,003		10.00	%
Worthington		47,554		14.09	%		27,006		8.00	%		35,446		10.50	%		33,758		10.00	%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,120,361		14.33	%	$	351,780		4.50	%	$	547,214		7.00	%	N/A		N/A
BancFirst		991,050		15.13	%		294,712		4.50	%		458,441		7.00	%	$	425,695		6.50	%
Pegasus		108,437		11.92	%		40,951		4.50	%		63,702		7.00	%		59,152		6.50	%
Worthington		44,207		13.10	%		15,191		4.50	%		23,631		7.00	%		21,943		6.50	%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,146,361		14.66	%	$	469,041		6.00	%	$	664,474		8.50	%	N/A		N/A
BancFirst		1,011,050		15.44	%		392,949		6.00	%		556,678		8.50	%	$	523,932		8.00	%
Pegasus		108,437		11.92	%		54,602		6.00	%		77,352		8.50	%		72,802		8.00	%
Worthington		44,207		13.10	%		20,255		6.00	%		28,694		8.50	%		27,006		8.00	%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	1,146,361		9.30	%	$	493,191		4.00	%	N/A		N/A			N/A		N/A
BancFirst		1,011,050		9.72	%		416,004		4.00	%	N/A		N/A			$	520,005		5.00	%
Pegasus		108,437		8.00	%		54,238		4.00	%	N/A		N/A				67,798		5.00	%
Worthington		44,207		8.53	%		20,738		4.00	%	N/A		N/A				25,922		5.00	%

As of December 31, 2023, the most recent notifications from the Federal Reserve Bank of Kansas City, the FDIC and the Comptroller of the Currency, categorized BancFirst, Pegasus and Worthington as “well capitalized” under the prompt corrective action provisions. The Common Equity Tier 1 Capital of BancFirst Corporation, BancFirst, Pegasus and Worthington includes common stock and related paid-in capital and retained earnings. In connection with the adoption of the Basel III Capital Rules, the election was made

to opt-out of the requirement to include most components of accumulated other comprehensive income in Common Equity Tier 1 Capital. Common Equity Tier 1 Capital for BancFirst Corporation, BancFirst, Pegasus and Worthington is reduced by goodwill and other intangible assets, net of associated deferred tax liabilities. The Company’s trust preferred securities have continued to be included in Tier 1 capital, as the Company’s total assets do not exceed $15 billion. The Company's Subordinated Notes have been structured to qualify as Tier 2 capital under bank regulatory guidelines. There are no conditions or events since the most recent notifications to BancFirst Corporation, BancFirst, Pegasus and Worthington of their capital category that management believes would materially change their category under capital requirements existing as of the report date.

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Net Income Per Common Share

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Net Income Per Common Share

(16) NET INCOME PER COMMON SHARE

Basic and diluted net income per common share are calculated as follows:

	Year ended December 31,
	2023		2022		2021
	(Dollars in thousands, except per share data)
(Numerator)
Income available to common stockholders	$	212,465	$	193,100	$	167,630
(Denominator)
Weighted-average shares outstanding for basic earnings per common share		32,919,348		32,778,355		32,716,099
Dilutive effect of stock compensation		575,139		661,141		598,047
Weighted-average shares outstanding for diluted earnings per common share		33,494,487		33,439,496		33,314,146
Basic earnings per share	$	6.45	$	5.89	$	5.12
Diluted earnings per share	$	6.34	$	5.77	$	5.03

The following table shows the number of options and RSU's that were excluded from the computation of diluted net income per common share for each period because they were anti-dilutive for the period:

	Shares
December 31, 2023		280,150
December 31, 2022		155,316
December 31, 2021		189,780

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Condensed Parent Company Financial Statements

12 Months Ended

Dec. 31, 2023

Condensed Financial Information Disclosure [Abstract]

Condensed Parent Company Financial Statements

(17) CONDENSED PARENT COMPANY FINANCIAL STATEMENTS

BALANCE SHEETS

	December 31,
	2023		2022
	(Dollars in thousands)
ASSETS
Cash	$	91,454	$	17,806
Investments in subsidiaries		1,315,124		1,206,246
Goodwill		101,611		101,611
Core deposit premium		10,428		12,009
Dividends receivable		17,091		15,682
Other assets		2,262		1,731
Total assets	$	1,537,970	$	1,355,085
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	$	17,978	$	18,205
Subordinated debt		86,101		86,044
Stockholders’ equity		1,433,891		1,250,836
Total liabilities and stockholders’ equity	$	1,537,970	$	1,355,085

STATEMENTS OF INCOME

	Year Ended December 31,
	2023			2022			2021
	(Dollars in thousands)
OPERATING INCOME
Dividends from subsidiaries	$	137,275		$	93,139		$	54,480
Interest on interest-bearing deposits		1,178			94			41
Other		726			1,338			1,071
Total operating income		139,179			94,571			55,592
OPERATING EXPENSE
Interest		4,122			4,122			3,130
Other		3,206			7,190			3,340
Total operating expense		7,328			11,312			6,470
Income before taxes and equity in undistributed earnings of subsidiaries		131,851			83,259			49,122
Allocated income tax benefit		2,249			5,857			4,191
Income before equity in undistributed earnings of subsidiaries		134,100			89,116			53,313
Equity in undistributed earnings of subsidiaries		81,275			105,817			116,365
Amortization of stock-based compensation arrangements of subsidiaries		(2,910	)		(1,833	)		(2,048	)
Net income	$	212,465		$	193,100		$	167,630

STATEMENTS OF CASH FLOW

	Year Ended December 31,
	2023			2022			2021
	(Dollars in thousands)
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	212,465		$	193,100		$	167,630
Adjustments to reconcile to net cash provided by operating activities:
Equity in undistributed earnings of subsidiaries		(81,275	)		(105,817	)		(116,365	)
Amortization of stock-based compensation arrangements of subsidiaries		2,910			1,833			2,048
Other, net		(655	)		3,815			5,056
Net cash provided by operating activities		133,445			92,931			58,369
INVESTING ACTIVITIES
Payments for investments in subsidiaries		(6,100	)		(94,967	)		(9,000	)
Other, net		(778	)		(1,352	)		4,429
Net cash used in investing activities		(6,878	)		(96,319	)		(4,571	)
FINANCING ACTIVITIES
Issuance of common stock		2,543			7,649			2,260
Common stock acquired		(1,820	)		—			(11,663	)
Net cash settlement of options		—			—			(5,479	)
Cash dividends paid		(53,642	)		(48,462	)		(45,140	)
Proceeds from the issuance of subordinated notes, net of debt issuance costs		—			—			59,150
Net cash used in financing activities		(52,919	)		(40,813	)		(872	)
Net increase/(decrease) in cash and due from banks		73,648			(44,201	)		52,926
Cash and due from banks at the beginning of the period		17,806			62,007			9,081
Cash and due from banks at the end of the period	$	91,454		$	17,806		$	62,007
SUPPLEMENTAL DISCLOSURE
Cash paid during the period for interest	$	4,122		$	4,122		$	3,130
Cash received during the period for income taxes, net	$	1,746		$	6,667		$	4,411

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Related Party Transactions

12 Months Ended

Dec. 31, 2023

Related Party Transactions [Abstract]

Related Party Transactions

(18) RELATED PARTY TRANSACTIONS

The Company had, and expects to have in the future, transactions with the Company’s directors and executive officers, companies with which these individuals are associated and certain related individuals. Such transactions were made in the ordinary course of business and included loans, leases and professional services.

Refer to Note (5) for information regarding loan transactions with related parties.

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Commitments and Contingent Liabilities

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingent Liabilities

(19) COMMITMENTS AND CONTINGENT LIABILITIES

The Company is a party to financial instruments with off balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include loan commitments and standby letters of credit, which involve elements of credit and interest rate risk to varying degrees. The Company’s exposure to credit loss in the event of nonperformance by the other party to the instrument is represented by the instrument’s contractual amount. To control this credit risk, the Company uses the same underwriting standards as it uses for loans recorded on the consolidated balance sheet. The amounts of financial instruments with off-balance-sheet risk are as follows:

	December 31,
	2023		2022
	(Dollars in thousands)
Loan commitments	$	2,785,673	$	2,627,552
Stand-by letters of credit		84,947		72,237

Loan commitments are agreements to lend to a customer, as long as there is no violation of any condition established in the contract. Stand-by letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. These instruments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the instruments are expected to expire without being drawn upon, the total amounts do not necessarily represent commitments that will be funded in the future.

The Company is a defendant in legal actions arising from normal business activities. Management believes that all legal actions against the Company are without merit or that the ultimate liability, if any, resulting from them will not materially affect the Company’s consolidated financial statements.

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Leases

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Leases

(20) LEASES

Lessee

The Company has operating leases, which primarily consist of office space in buildings, ATM locations, storage facilities, parking lots, equipment and land on which it owns certain buildings.

Rental expense on all operating leases, including those rented on a monthly or temporary basis were as follows (Dollars in thousands):

Year Ending December 31:
2023	$	2,066
2022		1,865
2021		1,560

A right of use lease asset included in accrued interest receivable and other assets on the consolidated balance sheet totaled $5.9 million at December 31, 2023 compared to $5.6 million at December 31, 2022, and a related lease liability included in accrued interest payable and other liabilities on the consolidated balance sheet totaled $5.8 million at December 31, 2023 compared to $5.4 million at December 31, 2022. As of December 31, 2023, our operating leases have a weighted-average remaining lease term of 3.2 years and a weighted-average discount rate of 2.6 percent.

Maturity of Operating Lease Liabilities

The following table presents minimum future commitments by year for the Company’s operating leases. Such commitments are reflected as undiscounted values and are reconciled to the discounted present value recognized on the consolidated balance sheet.

	December 31, 2023
	(Dollars in thousands)
2024	$	2,022
2025		1,653
2026		1,085
2027		731
2028		409
Thereafter		312
Total lease payments		6,212
Less imputed interest		(375	)
Operating lease liability	$	5,837

Lessor

The Company is a lessor of operating leases, which primarily consist of office space in buildings and parking lots. These assets are classified on the consolidated balance sheet as premises and equipment. The Company had operating lease revenue of $5.9 million,

$5.4 million and $4.9 million for the years ended December 31, 2023, 2022 and 2021, respectively. Lease revenue is included in occupancy, net on the consolidated statements of comprehensive income.

Future Minimum Lease Payments to be received

The Company does not have operating leases that extend beyond 2031. The following table presents the scheduled minimum future contractual rent to be received under the remaining non-cancelable term of the operating leases:

	December 31, 2023
	(Dollars in thousands)
2024	$	3,555
2025		2,796
2026		2,535
2027		2,181
2028		1,951
2029-2031		4,269
Total future minimum lease payments	$	17,287

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Fair Value Measurements

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

(21) FAIR VALUE MEASUREMENTS

Accounting standards define fair value as the price that would be received to sell an asset or the price paid to transfer a liability in the principal or most advantageous market available to the entity in an orderly transaction between market participants on the measurement date.

FASB Accounting Standards Codification (“ASC”) Topic 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

•Level 1 Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets.

•Level 2 Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset and liability, either directly or indirectly, for substantially the full term of the financial instrument.

•Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose values are determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. This category includes certain collaterally dependent loans, impaired loans, repossessed assets, other real estate owned, goodwill and other intangible assets.

Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis

A description of the valuation methodologies and key inputs used to measure financial assets and financial liabilities at fair value on a recurring basis, as well as the general classification of such instruments pursuant to the valuation hierarchy, is set forth below. These valuation methodologies were applied to the following categories of the Company’s financial assets and financial liabilities.

Debt Securities Available for Sale

Debt securities classified as available for sale are reported at fair value. U.S. Treasuries are valued using Level 1 inputs. Other debt securities available for sale including U.S. federal agencies, registered mortgage backed debt securities and state and political subdivisions are valued using prices from an independent pricing service utilizing Level 2 data. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other things. The Company also invests in private label mortgage backed debt securities for which observable information is not readily available. These debt securities are reported at fair value utilizing Level 3 inputs. For these debt securities, management determines the fair value based on replacement cost, the income approach or information provided by outside consultants or lead investors. Discount rates are primarily based on reference to interest rate spreads on comparable debt securities of similar duration and credit rating as determined by the

nationally recognized rating agencies adjusted for a lack of trading volume. Significant unobservable inputs are developed by investment securities professionals involved in the active trading of similar debt securities.

The Company reviews the prices for Level 1 and Level 2 debt securities supplied by the independent pricing service for reasonableness and to ensure such prices are aligned with traditional pricing matrices. In general, the Company does not purchase investment portfolio debt securities that are esoteric or that have complicated structures. The Company’s portfolio primarily consists of traditional investments including U.S. Treasury obligations, federal agency mortgage pass-through debt securities, general obligation municipal bonds and a small amount of municipal revenue bonds. Pricing for such instruments is fairly generic and is easily obtained. For in-state bond issues that have relatively low issue sizes and liquidity, the Company utilizes the same parameters for pricing mentioned in the preceding paragraph adjusted for the specific issue. Periodically, the Company will validate prices supplied by the independent pricing service by comparison to prices obtained from third party sources.

Derivatives

Derivatives are reported at fair value utilizing Level 2 inputs. The Company obtains dealer and market quotations to value its oil and gas swaps and options. The Company utilizes dealer quotes and observable market data inputs to substantiate internal valuation models.

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of the periods presented, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
	(Dollars in thousands)
December 31, 2023
Debt securities available for sale:
U.S. Treasury	$	1,498,045	$	—	$	—	$	1,498,045
U.S. federal agencies		—		11,770		—		11,770
Mortgage-backed securities		—		14,795		—		14,795
States and political subdivisions		—		9,830		180		10,010
Asset backed securities		—		12,512		—		12,512
Other debt securities		—		6,773		—		6,773
Derivative assets		—		41,099		—		41,099
Derivative liabilities		—		39,176		—		39,176
December 31, 2022
Debt securities available for sale:
U.S. Treasury	$	1,477,864	$	—	$	—	$	1,477,864
U.S. federal agencies		—		15,222		—		15,222
Mortgage-backed securities		—		16,586		—		16,586
States and political subdivisions		—		7,680		454		8,134
Asset backed securities		—		13,010		—		13,010
Other debt securities		—		7,405		—		7,405
Derivative assets		—		20,745		—		20,745
Derivative liabilities		—		19,683		—		19,683

The changes in Level 3 assets measured at estimated fair value on a recurring basis during the periods presented were as follows:

	Twelve Months Ended December 31,
	2023			2022
	(Dollars in thousands)
Balance at the beginning of the year	$	454		$	320
Transfers to level 2		(244	)		—
Purchases		—			255
Settlements		(30	)		(110	)
Total unrealized losses		—			(11	)
Balance at the end of the period	$	180		$	454

The Company’s policy is to recognize transfers in and transfers out of Levels 1, 2 and 3 as of the end of the reporting period. During the year ended December 31, 2023, the Company transferred debt securities from Level 3 to Level 2 due to a review of the pricing models that determined some state and political subdivision securities to be Level 2. During the year ended December 31, 2022, the Company did not transfer any debt securities.

Financial Assets and Financial Liabilities Measured at Fair Value on a Nonrecurring Basis

Certain financial assets and financial liabilities are measured at fair value on a nonrecurring basis; that is, the instruments are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). These financial assets and financial liabilities are reported at fair value utilizing Level 3 inputs.

The Company invests in equity securities without readily determinable fair values and utilizes Level 3 inputs. These equity securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income.

Collateral dependent loans are reported at the fair value of the underlying collateral if repayment is dependent on liquidation of the collateral. When the Company determines that foreclosure is probable or when the borrower is experiencing financial difficulty at the reporting date and repayment is expected to be provided substantially through the operation or sale of the collateral, expected credit losses are based on the fair value of the collateral at the reporting date, adjusted for selling costs as appropriate. In no case does the fair value of a collateral dependent loan exceed the fair value of the underlying collateral. The collateral dependent loans are adjusted to fair value through a specific allocation of the allowance for credit losses or a direct charge-down of the loan.

Repossessed assets, upon initial recognition, are measured and adjusted to fair value through a charge-off to the allowance for possible credit losses based upon the fair value of the repossessed asset.

Other real estate owned is revalued at fair value subsequent to initial recognition, with any losses recognized in net expense from other real estate owned.

The following table summarizes assets measured at fair value on a nonrecurring basis during the period presented. These nonrecurring fair values do not represent all assets, only those assets that have been adjusted during the reporting period:

	Total Fair Value Level 3
	(Dollars in thousands)
As of and for the Year-to-date Period Ended December 31, 2023
Equity securities	$	13,144
Collateral dependent loans		1,894
Repossessed assets		474
Other real estate owned		31,773
As of and for the Year-to-date Period Ended December 31, 2022
Equity securities	$	15,512
Collateral dependent loans		1,618
Repossessed assets		180
Other real estate owned		34,999

Estimated Fair Value of Financial Instruments

The Company is required under current authoritative accounting guidance to disclose the estimated fair value of their financial instruments that are not recorded at fair value. For the Company, as for most financial institutions, substantially all of its assets and liabilities are considered financial instruments. A financial instrument is defined as cash, evidence of an ownership interest in an entity or a contract that creates a contractual obligation or right to deliver or receive cash or another financial instrument from a second entity. The following methods and assumptions were used to estimate the fair value of each class of financial instruments:

Cash and Cash Equivalents Include: Cash and Due from Banks and Interest-Bearing Deposits with Banks

The carrying amount of these short-term instruments is a reasonable estimate of fair value.

Federal Funds Sold

The carrying amount of these short-term instruments is a reasonable estimate of fair value.

Debt Securities Held for Investment

For debt securities held for investment, which are generally traded in secondary markets, fair values are based on quoted market prices or dealer quotes, if available. If a quoted market price is not available, fair value is estimated using quoted market prices for similar securities making adjustments for credit or liquidity if applicable.

Loans Held for Sale

The Company originates mortgage loans to be sold. At the time of origination, the acquiring bank has already been determined and the terms of the loan, including interest rate, have already been set by the acquiring bank allowing the Company to originate the loan at fair value. Mortgage loans are generally sold within 30 days of origination. Loans held for sale are valued using Level 2 inputs. Gains or losses recognized upon the sale of the loans are determined on a specific identification basis.

Loans Held for Investment

To determine the fair value of loans held for investment, the Company uses an exit price calculation, which takes into account factors such as liquidity, credit and the nonperformance risk of loans. For certain homogeneous categories of loans, such as some residential mortgages, fair values are estimated using the quoted market prices for securities backed by similar loans, adjusted for differences in loan characteristics. The fair values of other types of loans are estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities.

Deposits

The fair values of transaction and savings accounts are the amounts payable on demand at the reporting date. The fair values of fixed-maturity certificates of deposit are estimated using the rates currently offered for deposits of similar remaining maturities.

Short-term Borrowings

The amounts payable on these short-term instruments are reasonable estimates of fair value.

Subordinated Debt

The fair values of subordinated debt are estimated using the rates that would be charged for subordinated debt of similar remaining maturities.

Loan Commitments and Letters of Credit

The fair values of commitments are estimated using the fees currently charged to enter into similar agreements, taking into account the terms of the agreements. The fair values of letters of credit are based on fees currently charged for similar agreements.

The estimated fair values of the Company’s financial instruments that are reported at amortized cost in the Company’s consolidated balance sheets, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value, are as follows:

	December 31,
	2023				2022
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(Dollars in thousands)
FINANCIAL ASSETS
Level 2 inputs:
Cash and cash equivalents	$	2,397,463	$	2,397,463	$	3,168,910	$	3,168,910
Federal funds sold		1,316		1,316		2,850		2,850
Debt securities held for investment		5		5		13		13
Loans held for sale		3,489		3,489		6,232		6,232
Level 3 inputs:
Debt securities held for investment		1,185		1,185		2,370		2,370
Loans held for investment, net of allowance for credit losses		7,559,845		7,356,768		6,850,835		6,563,755
FINANCIAL LIABILITIES
Level 2 inputs:
Deposits		10,700,122		10,413,348		10,974,228		10,614,840
Short-term borrowings		3,351		3,351		300		300
Subordinated debt		86,101		79,271		86,044		82,385
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS
Loan commitments				4,875				4,598
Letters of credit				637				542

Non-financial Assets and Non-financial Liabilities Measured at Fair Value

The Company has no non-financial assets or non-financial liabilities measured at fair value on a recurring basis. Certain non-financial assets and non-financial liabilities measured at fair value on a nonrecurring basis include intangible assets and other non-financial long-lived assets measured at fair value and adjusted for impairment. These items are evaluated at least annually for impairment, of which there was none as of December 31, 2023 or 2022. The overall levels of non-financial assets and non-financial liabilities measured at fair value on a nonrecurring basis were not considered to be significant to the Company at December 31, 2023 or 2022.

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Derivative Financial Instruments

12 Months Ended

Dec. 31, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

(22) DERIVATIVE FINANCIAL INSTRUMENTS

The Company enters into oil and gas swaps and options contracts to accommodate the business needs of its customers. Upon the origination of an oil or gas swap or option contract with a customer, to mitigate the exposure to fluctuations in oil and gas prices, the Company simultaneously enters into an offsetting contract with a counterparty. These derivatives are not designated as hedged instruments and are recorded on the Company's consolidated balance sheet at fair value and are included in other assets. The Company's derivative financial instruments require a daily margin to be posted, which fluctuates with oil and gas prices. At December 31, 2023, the Company had a margin liability in other liabilities in the amount of $15.5 million. At December 31, 2022, the Company had a margin asset included in other assets in the amount of $6.6 million.

The Company utilizes dealer quotations and observable market data inputs to substantiate internal valuation models. The notional amounts and estimated fair values of oil and gas derivative positions outstanding are presented in the following table:

		December 31,
		2023						2022
Oil and Natural Gas Swaps and Options	Notional Units	Notional Amount			Estimated Fair Value			Notional Amount			Estimated Fair Value
		(Notional amounts and dollars in thousands)
Oil
Derivative assets	Barrels		3,896		$	20,567			2,698		$	8,868
Derivative liabilities	Barrels		(3,896	)		(19,512	)		(2,698	)		(8,259	)
Gas/Natural Gas Liquids
Derivative assets	MMBTUs/Gallons		46,140			20,532			25,059			11,877
Derivative liabilities	MMBTUs/Gallons		(46,140	)		(19,664	)		(25,059	)		(11,424	)
Total Fair Value	Included in
Derivative assets	Other assets					41,099						20,745
Derivative liabilities	Other liabilities					(39,176	)					(19,683	)

The following table is a summary of the Company’s recognized income related to the activity, which was included in other noninterest income:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Derivative income	$	701	$	416	$	266

The Company’s credit exposure on oil and gas swaps and options varies based on the current market prices of oil and natural gas. Other than credit risk, changes in the fair value of customer positions will be offset by equal and opposite changes in the counterparty positions. The net positive fair value of the contracts represents the profit derived from the activity and is unaffected by market price movements. The Company’s share of total profit is approximately 35%.

Customer credit exposure is managed by strict position limits and is primarily offset by first liens on production while the remainder is offset by cash. Counterparty credit exposure is managed by selecting highly rated counterparties (rated A- or better by Standard and Poor’s) and monitoring market information.

The following table is a summary of the Company’s net credit exposure relating to oil and gas swaps and options with bank counterparties:

	December 31,
	2023		2022
	(Dollars in thousands)
Credit exposure	$	39,527	$	6,560

Balance Sheet Offsetting

Derivatives may be eligible for offset in the consolidated balance sheet and/or subject to master netting arrangements. The Company’s derivative transactions with upstream financial institution counterparties and bank customers are generally executed under International Swaps and Derivative Association (“ISDA”) master agreements, which include “right of set-off” provisions. In such cases there is generally a legally enforceable right to offset recognized amounts and there may be an intention to settle such amounts on a net basis. Nonetheless, the Company does not generally offset such financial instruments for financial reporting purposes.

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Segment Information

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Segment Information

(23) SEGMENT INFORMATION

The Company evaluates its performance with an internal profitability measurement system that measures the profitability of its business units on a pre-tax basis. The six principal business units are BancFirst metropolitan banks, BancFirst community banks, Pegasus, Worthington, other financial services and executive, operations and support. BancFirst metropolitan banks, BancFirst community banks, Pegasus and Worthington offer traditional banking products such as commercial and retail lending and a full line of deposit accounts. BancFirst metropolitan banks consist of banking locations in the metropolitan Oklahoma City and Tulsa areas. BancFirst community banks consist of banking locations in communities in Oklahoma outside the Oklahoma City and Tulsa metropolitan areas. Pegasus consists of banking locations in the Dallas metropolitan area. Worthington consists of banking locations in the Dallas-Fort Worth-Arlington metropolitan area. Other financial services are specialty product business units including guaranteed small business lending, residential mortgage lending, trust services, securities brokerage, electronic banking and insurance. The executive, operations and support groups represent executive management, operational support and corporate functions that are not allocated to the other business units.

The results of operations and selected financial information for the six business units are as follows:

	BancFirst Metropolitan Banks			BancFirst Community Banks			Pegasus			Worthington			Other Financial Services			Executive, Operations & Support			Eliminations			Consolidated
	(Dollars in thousands)
December 31, 2023
Net interest income	$	120,226		$	229,196		$	51,277		$	17,395		$	4,164		$	2,198		$	—		$	424,456
Provision for/(benefit    from) credit losses		4,836			2,331			(328	)		564			79			(24	)		—			7,458
Noninterest income		24,793			70,824			1,646			1,170			52,711			250,968			(216,704	)		185,408
Depreciation and    amortization		2,347			10,514			804			496			481			7,547			—			22,189
Other expenses		46,329			123,554			20,084			13,636			37,495			70,293			(1,122	)		310,269
Income before taxes	$	91,507		$	163,621		$	32,363		$	3,869		$	18,820		$	175,350		$	(215,582	)	$	269,948
Total assets	$	3,598,888		$	7,012,905		$	1,280,618		$	600,364		$	121,601		$	1,307,714		$	(1,550,048	)	$	12,372,042
Capital expenditures	$	2,752		$	5,156		$	528		$	5,497		$	108		$	8,463		$	—		$	22,504
December 31, 2022
Net interest income	$	97,728		$	208,728		$	46,439		$	14,919		$	8,065		$	(2,226	)	$	20		$	373,673
(Benefit from)/provision    for credit losses		2,186			2,451			2,840			(43	)		(161	)		2,803			—			10,076
Noninterest income		32,756			72,385			1,026			1,034			50,643			223,844			(197,941	)		183,747
Depreciation and    amortization		2,821			10,453			789			398			519			7,068			—			22,048
Other expenses		42,583			117,248			19,013			9,280			36,271			64,325			(856	)		287,864
Income before taxes	$	82,894		$	150,961		$	24,823		$	6,318		$	22,079		$	147,422		$	(197,065	)	$	237,432
Total assets	$	3,412,369		$	6,886,066		$	1,404,033		$	541,002		$	171,679		$	1,473,443		$	(1,500,729	)	$	12,387,863
Capital expenditures	$	2,026		$	10,146		$	311		$	262		$	67		$	6,973		$	—		$	19,785
December 31, 2021
Net interest income	$	77,840		$	180,925		$	24,222		$	—		$	35,244		$	(3,295	)	$	721		$	315,657
Provision for credit losses		(5,474	)		(4,694	)		1,395			—			109			(26	)		—			(8,690	)
Noninterest income		23,257			65,600			1,448			—			47,124			203,005			(170,402	)		170,032
Depreciation and    amortization		2,593			10,483			782			—			557			5,626			—			20,041
Other expenses		39,356			110,574			15,317			—			60,435			41,199			(941	)		265,940
Income before taxes	$	64,622		$	130,162		$	8,176		$	—		$	21,267		$	152,911		$	(168,740	)	$	208,398
Total assets	$	2,627,874		$	5,821,220		$	1,045,699		$	—		$	71,694		$	1,201,974		$	(1,362,849	)	$	9,405,612
Capital expenditures	$	1,612		$	7,390		$	363		$	—		$	400		$	17,486		$	—		$	27,251

The financial information for each business unit is presented on the basis used internally by management to evaluate performance and allocate resources. The Company utilizes a transfer pricing system to allocate the benefit or cost of funds provided or used by the various business units. Certain services provided by the support group to other business units, such as item processing, are allocated at rates approximating the cost of providing the services. Eliminations are adjustments to consolidate the business units and companies. Capital expenditures are generally charged to the business unit using the asset.

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Description of Business and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Nature of Operations

Nature of Operations

BancFirst Corporation is an Oklahoma business corporation and a financial holding company under federal law. It conducts virtually all of its operating activities through its principal wholly-owned subsidiary, BancFirst (“BancFirst”), an Oklahoma state-chartered bank headquartered in Oklahoma City, Oklahoma. The Company also conducts operating activities through its wholly-owned subsidiaries, Pegasus Bank (“Pegasus”), a Texas state-chartered bank headquartered in Dallas, Texas and Worthington Bank ("Worthington"), a Texas state-chartered bank headquartered in Arlington, Texas. BancFirst, Pegasus and Worthington provide a wide range of retail and commercial banking services, including: commercial, real estate, agricultural and consumer lending; depository and funds transfer services; collections; safe deposit boxes; cash management services; and other services tailored for both individual and corporate customers. BancFirst also offers trust services and acts as executor, administrator, trustee, transfer agent and in various other fiduciary capacities. BancFirst provides item processing, research and other correspondent banking services to financial institutions and governmental units. The Company’s wholly-owned subsidiary, BancFirst Insurance Services, Inc., an independent insurance agency, offers a variety of commercial and personal insurance products. In addition, the Company’s wholly-owned subsidiary, Council Oak Partners, LLC, an Oklahoma limited liability company, engages in investing activities.

Basis of Presentation

Basis of Presentation

The accompanying consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., Pegasus, Worthington and BancFirst and its subsidiaries. The principal operating subsidiaries of BancFirst are BFTower, LLC, BFC-PNC LLC, BF Brazito, LLC, and BancFirst Agency, Inc. All significant intercompany accounts and transactions have been eliminated. Assets held in a fiduciary or agency capacity are not assets of the Company and, accordingly, are not included in the consolidated financial statements. Certain amounts from 2022 and 2021 have been reclassified to conform to the 2023 presentation. These reclassifications were not material to the Company’s consolidated financial statements.

Use of Estimates in the Preparation of Financial Statements

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with U.S. GAAP inherently involves the use of estimates and assumptions that affect the amounts reported in the financial statements and the related disclosures. These estimates relate principally to the determination of the allowance for credit losses, income taxes, the fair value of financial instruments and the valuation of assets and liabilities acquired in a business combination, including identifiable intangible assets. Such estimates and assumptions may change over time and actual amounts realized may differ from those reported.

Securities

Securities

The Company invests in debt securities. Any sales of debt securities are for the purpose of executing the Company’s asset/liability management strategy, eliminating a perceived credit risk in a specific security or providing liquidity. Debt securities that are being held for indefinite periods of time, or that may be sold as part of the Company’s asset/liability management strategy, to provide liquidity or for other reasons, are classified as available for sale and are stated at estimated fair value. Unrealized gains or losses on debt securities available for sale are reported as a component of stockholders’ equity, net of income tax. Gains or losses from sales of debt securities are based upon the book values of the specific debt securities sold. Debt securities for which the Company has the intent and ability to hold to maturity are classified as held for investment and are stated at cost, adjusted for amortization of premiums and accretion of discounts computed under the interest method. The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. The Company first assesses whether it intends to sell or it is more-likely-than-not that it will be required to sell the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities amortized cost basis is written down to fair value as a current period expense. If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. The Company does not consider the unrealized position of its debt securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for

credit losses against its debt securities portfolio, as the credit risk is not material. The Company does not engage in securities trading activities.

The Company invests in equity securities without readily determinable fair values and utilizes Level 3 inputs. These securities are reported at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The realized and unrealized gains and losses are reported as securities transactions in the noninterest income section of the consolidated statements of comprehensive income. Equity securities are reported in other assets on the consolidated balance sheet. The Company reviews its portfolio of equity securities for impairment at least quarterly.

Loans

Loans

The lending function is governed by written policies and procedures, as determined by senior management and approved by the Board of Directors. The policies and procedures set the standards for lending in each major loan category by collateral type and use of loan proceeds. The objectives of these policies and procedures are to identify profitable markets, determine appropriate risk tolerance levels for each type of loan, establish limits for loan officer approval, set concentration limits, establish loan-to-value thresholds, set repayment terms and loan structure guidelines and adhere to documentation requirements. Interest rate risk is controlled by the use of variable rate provisions, the vast majority of which have a rate floor, limits on fixing rates for longer periods and the use of prepayment penalties.

Loans originated within the Company are stated at the principal amount outstanding, net of unearned interest, loan fees and allowance for credit losses. Interest on all performing loans is recognized, on a simple interest basis, based upon the principal amount outstanding. See Note (5) for loan disclosures.

Loans that management has the intent and ability to hold for the foreseeable future or until maturity or payoff are reported at amortized cost. Amortized cost is the principal balance outstanding, net of purchase premiums and discounts. The Company has made the accounting policy election to exclude accrued interest receivable on loans from the estimate of credit losses because it writes off uncollectible accrued interest in a timely manner. Interest income is accrued on the unpaid principal balance using the simple-interest method on the daily balances of the principal amounts outstanding.

The Company writes off accrued interest once a loan enters non-accrual status. The Company debits interest income for the interest accrued. No interest will be accrued on loans, for which a default of principal or interest has existed for a period of at least 90 days unless the collateral margin or guarantor support are such that full collection of principal and interest are not in doubt and an orderly plan for collection is in process. The Company also suspends interest recognition on any other loan for which it is more likely than not that future contractual payments will not be collected.

Interest income on consumer and commercial loans is discontinued and placed on nonaccrual status at the time the loan is 90 days delinquent unless the loan is well secured and in process of collection. Consumer loans are charged off at 180 days past due and commercial loans are charged off to the extent principal or interest is deemed uncollectible. Past-due status is based on the contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged off at an earlier date if collection of principal or interest is considered doubtful.

All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. The amount of interest accrued but not received for loans placed on nonaccrual and reversed against interest income was $429,000, $147,000 and $83,000 for the years ended December 31, 2023, 2022 and 2021, respectively. Interest received on such loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual. Under the cost-recovery method, interest income is not recognized until the loan balance is reduced to zero. Under the cash-basis method, interest income is recorded when the payment is received in cash. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.

Modifications of loans to existing borrowers generally consist of interest rate reductions, extension of payment terms, or a combination of these. Modifications may arise either voluntarily through negotiations with the borrower or involuntarily through court order. Payment deferrals up to six months are generally considered to be short-term modifications. Generally, principal and accrued but unpaid interest is not voluntarily forgiven. A change to the allowance for credit losses is generally not recorded upon modification because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the allowance methodology.

Residential real estate loans are made in accordance with underwriting policies and are fully documented. Credit worthiness is assessed based on significant credit characteristics including credit history and residential and employment stability. The Company does not engage in any hybrid loan programs. In addition, the Company does not have any exposure to loans with negative amortization, interest rate carryover or discounting of the initial rates (teaser rates).

An updated appraisal of the collateral is obtained when a loan is first identified as a problem loan. Appraisals are reviewed annually and are updated as needed or are updated more frequently if significant changes are believed to have occurred in the collateral or market conditions. Appraisals of other real estate owned are also reviewed and updated consistent with this policy.

When a loan deteriorates to the point that the account officer or the Loan Committee concludes it no longer represents a viable asset, it will be charged off. Similarly, any portion of a loan that is deemed to no longer be a viable asset will be charged off. A loan will not be charged off unless such action has been approved by the branch President.

Acquired Loans

Acquired Loans

Loans acquired through business combinations are required to be carried at fair value as of the date of the combination. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date. The methodology of allowance for credit loss recorded for these acquired loans depends on whether the acquired loans are purchase credit deteriorated or non-purchase credit deteriorated. An allowance for credit loss for non-purchase credit deteriorated loans is determined and recorded in a manner consistent with originated loans. That is, the allowance for credit loss is calculated based on the loan’s amortized cost basis (i.e., the acquisition date fair value in a business combination) and is established through a charge to provision expense at the acquisition date. An allowance for credit loss for purchase credit deteriorated loans is recorded as an adjustment to the loans, in addition to the fair value amount recorded, as of the acquisition date, and not through provision expense. The acquisition date fair value plus the allowance for credit loss equals the loans new amortized cost basis as of the acquisition date. The difference between the new amortized cost basis and the unpaid principal balance of the loan represents the non-credit purchase discount/premium recorded. The difference between the fair value of loans which do not have specific evidence of deterioration of credit quality since origination and their principal balance is recognized in interest income on a level-yield method over the life of the loans. For loans which it is probable, at acquisition, that the Company will be unable to collect all contractually required payments (as determined by the present value of expected future cash flows), the difference between the undiscounted cash flows expected at acquisition and the investment in the loan, or the “accretable yield,” is recognized in interest income on a level-yield method over the life of the loan. Contractually required payments for interest and principal that exceed the undiscounted cash flows expected at acquisition, or the “nonaccretable difference,” are not recognized as yield adjustments or as loss accruals or valuation allowances. Increases in expected cash flows subsequent to the initial investment are recognized prospectively through adjustment of the yield on the loan over its remaining life. Decreases in expected cash flows are recognized as impairments. Any probable loss due to subsequent credit deterioration of the loans since acquisition is provided for in the allowance for credit losses.

Purchased Credit Deteriorated (PCD) Loans

Purchased Credit Deteriorated (PCD) Loans

The Company has purchased loans, some of which have experienced more than insignificant credit deterioration since origination. An allowance for credit losses is determined using the same methodology as other loans held for investment. The initial allowance for credit losses determined on a collective basis is allocated to individual loans. The sum of the loan’s purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the allowance for credit losses are recorded through provision expense.

Loans Held for Sale

Loans Held for Sale

The Company originates mortgage loans to be sold. At the time of origination, the acquiring bank has already been determined and the terms of the loan, including the interest rate, have already been set by the acquiring bank allowing the Company to originate the loan at fair value. Mortgage loans are generally sold within 30 days of origination. Loans held for sale are carried at the lower of cost or fair value. Gains or losses recognized upon the sale of the loans are determined on a specific identification basis. The Company does not sell residential mortgage loans with recourse other than obligations under standard representations and warranties or for fraud. These obligations relate to loan performance for the life of the loan. The amount of loans repurchased since the inception of the program is not considered to be material, and therefore, no reserve has been required.

Allowance for Credit Losses

Allowance for Credit Losses

The allowance for credit losses is a valuation account that is deducted from the loans amortized cost basis to present the net amount expected to be collected on the loans. Loans are charged off against the allowance when management believes the uncollectibility of a

loan balance is confirmed. Expected recoveries do not exceed the aggregate of amounts previously charged-off and expected to be charged-off. The allowance for credit losses is increased by provisions charged to operating expense and is reduced by net loan charge-offs.

The Company considers various factors to monitor the credit risk in the loan portfolio including volume and severity of loan delinquencies, nonaccrual loans, internal grading of loans, historical loan loss experience and economic conditions.

Management estimates the allowance balance using relevant available information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. Historical credit loss experience provides the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, delinquency level, or term as well as for changes in environmental conditions, such as the political, legal, and regulatory environment, technology and consumer preferences. Historical loss information is also adjusted for reasonable and supportable changes in national and local economic conditions, such as consumer loans 90 days past due and commercial bankruptcies. Economic conditions are forecast as "current conditions" over the forecast period. Forecast models were used to validate credit performance during the forecast period. Beyond the reasonable and supportable forecast, the economic expectation reverts to the historical average, which is determined by the weighted average life of each loan pool.

If a loan is individually evaluated a specific allowance is provided, if necessary, so that the loan is reported net, at the fair value of collateral. Interest payments on collateral dependent loans are typically applied to principal unless collectability of the principal amount is reasonably assured, in which case interest is recognized on a cash basis. Loans, or portions thereof, are charged off when deemed uncollectible. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist.

Determining the Contractual Term

Determining the Contractual Term

Expected credit losses are estimated over the contractual term of the loans, adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications unless the following applies: the extension or renewal options are included in the original or modified contract at the reporting date and are not unconditionally cancellable by the Company.

Allowance for Credit Losses on Off-Balance Sheet Credit Exposures

Allowance for Credit Losses on Off-Balance Sheet Credit Exposures

The Company estimates expected credit losses over the contractual period in which the Company is exposed to credit risk via a contractual obligation to extend credit, unless that obligation is unconditionally cancellable by the Company. The allowance for credit losses on off-balance sheet credit exposures is adjusted as a provision for credit loss expense. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated life. Based on a low likelihood that funding will occur and the Company’s ability to manage the extension of credit to our borrowers, the allowance for credit losses on off-balance sheet credit exposure is not material.

Allowance for Credit Losses on Available-for-Sale Debt Securities

Allowance for Credit Losses on Available-for-Sale Debt Securities

The Company reviews its portfolio of debt securities in an unrealized loss position at least quarterly. The Company first assesses whether it intends to sell or it is more-likely-than-not that it will be required to sell the securities before recovery of the amortized cost basis. If either of these criteria is met, the securities amortized cost basis is written down to fair value as a current period expense. If either of the above criteria is not met, the Company evaluates whether the decline in fair value is the result of credit losses or other factors. In making this assessment, the Company considers, among other things, the performance of any underlying collateral and adverse conditions specifically related to the security. At December 31, 2023 and December 31, 2022 approximately 98% of the available for sale debt securities held by the Company were issued by the U.S. Treasury, or U.S. government-sponsored entities and agencies. The Company does not consider the unrealized loss position of these securities to be the result of credit factors, because the decline in fair value is attributable to changes in interest rates and illiquidity, and not credit quality, and the Company does not have the intent to sell these securities and it is likely that it will not be required to sell the securities before their anticipated recovery. Therefore, the Company has not recorded an allowance for credit losses against its debt securities portfolio, as the credit risk is not material.

Nonaccrual Policy

Nonaccrual Policy

A loan is placed on nonaccrual status when, in the opinion of management, the future collectability of both interest and principal is not probable. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest income is recognized on certain of these loans on a cash basis if the full collection of the remaining principal balance is reasonably expected. Otherwise, interest income is not recognized until the principal balance is fully collected.

The Company does not accrue interest on (1) any loan upon which a default of principal or interest has existed for a period of 90 days or over unless the collateral margin or guarantor support are such that full collection of principal and interest are not in doubt, and an orderly plan for collection is in process; and (2) any other loan for which it is expected full collection of principal and interest is not probable.

A nonaccrual loan may be restored to an accrual status when none of its principal and interest are past due and unpaid or otherwise becomes well secured and in the process of collection and when prospects for collection of future contractual payments are no longer in doubt. With the exception of a formal debt forgiveness agreement, no loan which has had principal charged-off shall be restored to accrual status unless the charged-off principal has been recovered.

Premises and Equipment

Premises and Equipment

Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is charged to operating expense and is computed using the straight-line method over the estimated useful lives of the assets. Maintenance and repairs are charged to expense as incurred while improvements are capitalized. Premises and equipment is tested for impairment if events or changes in circumstances occur that indicate that the carrying amount of any premises and equipment may not be recoverable. Impairment losses are measured by comparing the fair values of the premises and equipment with their recorded amounts. Premises that are identified to be sold are transferred to other real estate owned at the lower of their carrying amounts or their fair values less estimated costs to sell. Any losses on premises identified to be sold are charged to operating expense. When premises and equipment are transferred to other real estate owned, sold, or otherwise retired, the cost and applicable accumulated depreciation are removed from the respective accounts and any resulting gains or losses are reported in the consolidated statements of comprehensive income. Construction in progress includes all the costs of construction associated with the building of fixed long-term assets and is included in premises and equipment, net as an asset. When construction is completed, the asset is reclassified as a building or a leasehold improvement and depreciated over its applicable useful life.

Leases

Leases

Certain operating leases are included as right of use lease assets in accrued interest receivable and other assets on the consolidated balance sheet and a related lease liability is included in accrued interest payable and other liabilities on the consolidated balance sheet. Right of use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. The lease liability is measured as the present value of the unpaid lease payments, and the right of use assets value is derived from the calculation of the lease liability. To calculate the discount rate for each lease, the Company uses the rate implicit in the lease if available, otherwise an appropriate Federal Home Loan Bank ("FHLB") advance borrowing rate is used that correlates with the term of the lease.

Other Real Estate Owned

Other Real Estate Owned

Other real estate owned ("OREO") consists of properties acquired through foreclosure proceedings or acceptance of a deed in lieu of foreclosure, and premises held for sale. These properties are carried at the lower of the book values of the related loans or fair values based upon appraisals, less estimated costs to sell. Losses arising at the time of reclassification of such properties from loans to OREO are charged directly to the allowance for credit losses. Any losses on premises identified to be sold are charged to operating expense at the time of transfer from premises to OREO. Losses from declines in value of the properties subsequent to classification as OREO are charged to operating expense. Revenues and expenses for OREO property are included in the consolidated statements of comprehensive income for the period in which they occur. Gross rental income for OREO is included in other non-interest income. The expenses of operating or holding OREO property are included in noninterest expense.

Intangible Assets and Goodwill

Intangible Assets and Goodwill

Core deposit intangibles are amortized on a straight-line basis over the estimated useful lives of seven to ten years and customer relationship intangibles are amortized on a straight-line basis over the estimated useful life of three to eighteen years. Goodwill is not amortized but is evaluated at a reporting unit level at least annually for impairment, or more frequently if other indicators of impairment are present. At least annually in the fourth quarter, intangible assets are evaluated for possible impairment. Impairment losses are measured by comparing the fair values of the intangible assets with their recorded amounts. Any impairment losses are reported in the consolidated statements of comprehensive income.

Advertising Costs

Advertising Costs

Advertising costs are expensed as incurred. Advertising costs for the year ended December 31, 2023 were $3.2 million. Advertising costs for the years ended December 31, 2022 and 2021 were both $3.0 million.

Stock-based Compensation

Stock-based Compensation

The Company recognizes stock-based compensation as compensation expense in the consolidated statements of comprehensive income based on the fair value of the Company’s stock options and restricted stock units ("RSU's") on the measurement date, which, for the Company, is the date of the grant. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model and is based on certain assumptions including risk-free rate of return, dividend yield, stock price volatility and the expected term. The fair value of each RSU granted is equal to the market price of the Company’s stock at the date of grant. The fair value of each option and RSU is expensed over its vesting period.

Income Taxes

Income Taxes

The Company files a consolidated income tax return with its subsidiaries. Federal and state income tax expense or benefit has been allocated to subsidiaries on a separate return basis. Deferred taxes are recognized under the balance sheet method based upon the future tax consequences of temporary differences between the carrying amounts and tax basis of assets and liabilities, using the tax rates expected to apply to taxable income in the periods when the related temporary differences are expected to be realized. Realization of deferred tax assets is dependent upon the generation of a sufficient level of future taxable income and recoverable taxes paid in prior years. Although realization is not assured, management believes it is more likely than not that all of the deferred tax assets will be realized.

Earnings Per Common Share

Earnings Per Common Share

Basic earnings per common share is computed by dividing net income, less any preferred dividends requirement, by the weighted average of common shares outstanding. Diluted earnings per common share reflects the potential dilution that could occur if options, RSU's, convertible securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the Company.

Revenue Recognition

Revenue Recognition

In addition to lending and related activities, the Company offers various services to customers that generate revenue. Contract performance typically occurs in one year or less. Incremental costs of obtaining a contract are expensed when incurred when the amortization period is one year or less.

Sales of real estate

The sale of real estate property is generally recognized, along with any associated gain or loss, when control of the property transfers to the buyer.

Service and transaction fees on depository accounts

Customers often pay certain fees to the bank to access the cash on deposit including certain non-transactional fees such as account maintenance or dormancy fees, and certain transaction-based fees such as non-sufficient funds fees, overdraft, ATM, wire transfer, or foreign exchange fees. Revenue is recognized when the transactions occur or as services are performed over primarily monthly or quarterly periods. Payment is typically received in the period the transactions occur, or in some cases, within 90 days of the service period.

Interchange Fees

Interchange fees, or “swipe” fees, are charges that merchants pay to the processors who, in turn, share that revenue with us and other card-issuing banks for processing electronic payment transactions. Interchange fees represent the portion of the debit card transaction amount that the card issuer retains to compensate it for processing transactions and providing rewards. Interchange fees are settled and recognized on a daily or monthly basis.

Insurance Commissions and Fees

Insurance commissions are received on the sale of insurance products, and revenue is recognized upon the placement date of the insurance policies or when such commissions are received. Payment is normally received within the policy period. In addition to placement, the Company also provides insurance policy related risk management services. Revenue is recognized as these services are provided. Performance-based commissions are recognized when received or earlier when, upon consideration of past results and current condition, the revenue is deemed not probable of reversal.

For accounts billed by BancFirst Insurance Services, Inc., commission revenue is recognized at the later of the billing date or the effective date of the related insurance policies. Commission revenue, for accounts that are directly billed by the insurance company to the insured, is recognized when determinable by BancFirst Insurance Services, Inc., which is generally when such commissions are received.

BancFirst Insurance Services, Inc. also receives contingent commissions from insurance companies as additional incentive for achieving specified premium volume goals and/or loss experience parameters relating to the insurance they place. Contingent commissions from insurance companies are recognized when determinable, which is generally when such commissions are received.

Trust

BancFirst offers trust services and acts as executor, administrator, trustee, transfer agent and in various other fiduciary capacities. There are four basic types of fees that are included in the trust department income. Administrative fees are assessed for managing trust accounts. Shareholder fees are received in connection with holding specific fund share classes. In return for these services, the mutual fund (or its distributor or investment advisor) pay a fee to BancFirst. Oil and gas fees are assessed for management of oil and gas related activities. There are also other types of fees charged on a one time basis such as those related to opening and closing trust accounts. BancFirst records trust fees on a monthly, quarterly or annual basis based on the size of the asset being managed. Fees may be fixed or, where applicable, based on a percentage of transaction size of managed assets. These fees are recorded as revenue at the time the fee is billed, according to the agreement with the customer.

Comprehensive Income

Comprehensive Income

Comprehensive income includes all changes in stockholders’ equity during a period, except those resulting from transactions with stockholders. Besides net income, other components of the Company’s comprehensive income includes the after tax effect of changes in the net unrealized gain/loss on debt securities available for sale. The Company’s policy is to release material stranded tax effects included in accumulated other comprehensive income on a specific identification basis.

Consolidated Statement of Cash Flows

Consolidated Statements of Cash Flows

For purposes of the consolidated statements of cash flows, the Company considers cash and due from banks and interest-bearing deposits with banks as cash equivalents.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Standards Not Yet Adopted:

In November 2023, the Financial Accounting Standards Board (“FASB“) issued Accounting Standards Update (“ASU”) 2023-07, “Segment Reporting - Improvements to Reportable Segment Disclosures” requiring disclosure of incremental segment information on an annual and interim basis for all public entities to enable investors to develop more decision-useful financial analyses. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal year beginning after December 15, 2024 on a retrospective basis. The amendments are to be applied retrospectively to all periods presented and segment expense categories should be based on the categories identified at adoption. The Company does not expect adoption of the standard to have a material impact on its consolidated financial statements.

In December 2023, FASB issued ASU No. 2023-09, “Income Taxes - Improvements to Income Tax Disclosures” requiring enhancements and further transparency to certain income tax disclosures, most notably the tax rate reconciliation and income taxes paid. This ASU is effective for fiscal years beginning after December 15, 2024 on a prospective basis and retrospective application is permitted. The Company does not expect adoption of the standard to have a material impact on its consolidated financial statements.

Standards Adopted During the Current Period:

In March 2022, FASB issued ASU No. 2022-02, “Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” ASU 2022-02 eliminated the Troubled Debt Restructurings (“TDR”) recognition and measurement guidance and, instead, required that the Company evaluate, based on the accounting for loan modifications, whether the modification represents a new loan or a continuation of an existing loan when a borrower is experiencing financial difficulty. In addition, the update required that the Company disclose current-period charge-offs by year of origination for financing receivables. The current-period charge-off amendment was applied prospectively. The amendments were effective for annual periods beginning after December 15, 2022, including interim periods within those annual periods. The Company adopted ASU 2022-02 on a prospective basis on January 1, 2023. ASU No. 2022-02 did not have a significant impact on the Company’s consolidated financial statements.

Prior to the adoption of ASU 2022-02, a TDR occurred when a loan to a borrower experiencing financial difficulty was restructured with a concession provided that a creditor would not otherwise consider. For the Company's accounting policy related to TDRs granted prior to the adoption of ASU 2022-02, refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

In March 2023, FASB issued ASU No. 2023-02, “Investments - Equity Method and Joint Ventures (Topic 323)”. ASU 2023-02 permits the election of accounting for tax equity investments, regardless of the tax credit program from which the income tax credits are received, using the proportional amortization method, if certain conditions are met. Using the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the income tax credits and other income tax benefits received and recognizes the net amortization and income tax credits and other income tax benefits in the income statement as a component of income tax expense (benefit). The amendments are effective for annual periods beginning after December 15, 2023, including interim periods within those annual periods. Early adoption is permitted for all entities in any interim period. The Company adopted the amendment as of January 1, 2023 using the modified retrospective transition. The Company has investments in New Markets Tax Credits ("NMTC"), Low-Income Housing Tax Credits ("LIHTC") and other tax credits that were affected by ASU 2023-02. As a result of the adoption of ASU No. 2023-02, the Company recorded $25.1 million in other assets and other liabilities on the consolidated balance sheet during 2023 for unfunded LIHTC commitments and amortized $6.0 million of NMTC and other tax credit investments to income tax expense during the period that would have previously been recorded to other expense. ASU No. 2023-02 did not have a significant impact on the Company’s consolidated financial statements as disclosed above.

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Cash, Due from Banks, Interest-Bearing Deposits and Federal Funds Sold (Tables)

12 Months Ended

Dec. 31, 2023

Cash and Cash Equivalents [Abstract]

Summary of Vault Cash and Funds on Deposit with Federal Reserve Bank

The Company maintained vault cash and funds on deposit with the Federal Reserve Bank, which is included in the following table:

	December 31,
	2023		2022
	(Dollars in thousands)
Vault cash and funds on deposit with the Federal Reserve Bank	$	2,255,198	$	2,942,665

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Securities (Tables)

12 Months Ended

Dec. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Summary of Amortized Cost and Estimated Fair Values of Debt Securities Held for Investment

The following table summarizes the amortized cost and estimated fair values of debt securities held for investment:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
	(Dollars in thousands)
December 31, 2023
Mortgage backed securities (1)	$	5	$	—	$	—	$	5
States and political subdivisions		685		—		—		685
Other securities		500		—		—		500
Total	$	1,190	$	—	$	—	$	1,190
December 31, 2022
Mortgage backed securities (1)	$	13	$	—	$	—	$	13
States and political subdivisions		1,870		—		—		1,870
Other securities		500		—		—		500
Total	$	2,383	$	—	$	—	$	2,383

Summary of Amortized Cost and Estimated Fair Values of Debt Securities Available for Sale

The following table summarizes the amortized cost and estimated fair values of debt securities available for sale:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(Dollars in thousands)
December 31, 2023
U.S. treasuries	$	1,560,265	$	415	$	(62,635	)	$	1,498,045
U.S. federal agencies		11,631		142		(3	)		11,770
Mortgage backed securities (1)		16,459		13		(1,677	)		14,795
States and political subdivisions		10,108		16		(114	)		10,010
Asset backed securities		12,794		—		(282	)		12,512
Other securities		8,163		—		(1,390	)		6,773
Total	$	1,619,420	$	586	$	(66,101	)	$	1,553,905
December 31, 2022
U.S. treasuries	$	1,568,563	$	—	$	(90,699	)	$	1,477,864
U.S. federal agencies		15,025		198		(1	)		15,222
Mortgage backed securities (1)		18,449		21		(1,884	)		16,586
States and political subdivisions		8,320		35		(221	)		8,134
Asset backed securities		13,371		—		(361	)		13,010
Other securities		8,163		—		(758	)		7,405
Total	$	1,631,891	$	254	$	(93,924	)	$	1,538,221

(1)Primarily consists of FHLMC, FNMA, GNMA and mortgage backed securities through U.S. agencies.

Maturity of Debt Securities

The maturities of debt securities held for investment and available for sale are summarized in the following table using contractual maturities. Actual maturities may differ from contractual maturities due to obligations that are called or prepaid. For purposes of the maturity table, mortgage-backed securities, which are not due at a single maturity date, have been presented at their contractual maturity.

	December 31,
	2023				2022
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
	(Dollars in thousands)
Held for Investment
Contractual maturity of debt securities:
Within one year	$	350	$	350	$	1,186	$	1,186
After one year but within five years		840		840		1,195		1,195
After five years but within ten years		—		—		2		2
After ten years		—		—		—		—
Total	$	1,190	$	1,190	$	2,383	$	2,383
Available for Sale
Contractual maturity of debt securities:
Within one year	$	348,318	$	341,645	$	101,607	$	100,655
After one year but within five years		1,223,529		1,167,973		1,316,874		1,233,725
After five years but within ten years		10,331		8,851		170,513		163,101
After ten years		37,242		35,436		42,897		40,740
Total debt securities	$	1,619,420	$	1,553,905	$	1,631,891	$	1,538,221

Proceeds from Sales and Realized Losses on Available for Sale Debt Securities

The following is a detail of proceeds from sales and the realized losses on available for sale debt securities:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Proceeds	$	—	$	222,474	$	—
Gross losses realized		—		3,990		—

Company's Book Value of Pledged Debt Securities

The following table is a summary of the Company’s book value of debt securities that were pledged as collateral for public funds on deposit, repurchase agreements and for other purposes as required or permitted by law:

	December 31,
	2023		2022
	(Dollars in thousands)
Book value of pledged securities	$	591,324	$	573,952

Summary of Debt Securities with Unrealized Losses, Segregated by Duration of Unrealized Loss

The following table summarizes debt securities with unrealized losses, segregated by the duration of the unrealized loss, at December 31, 2023 and 2022 respectively:

			Less than 12 Months				More than 12 Months				Total
	Number of investments		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
			(Dollars in thousands)
December 31, 2023
Available for Sale
U.S. treasuries		68	$	4,838	$	90	$	1,401,669	$	62,545	$	1,406,507	$	62,635
U.S. federal agencies		3		1,100		3		—		—		1,100		3
Mortgage backed    securities		74		80		—		13,261		1,677		13,341		1,677
States and political    subdivisions		6		306		4		1,847		110		2,153		114
Asset backed securities		1		—		—		12,512		282		12,512		282
Other securities		3		—		—		6,773		1,390		6,773		1,390
Total		155	$	6,324	$	97	$	1,436,062	$	66,004	$	1,442,386	$	66,101
December 31, 2022
Available for Sale
U.S. treasuries		74	$	787,925	$	27,078	$	689,939	$	63,621	$	1,477,864	$	90,699
U.S. federal agencies		1		—		—		349		1		349		1
Mortgage backed    securities		92		10,001		1,239		5,055		645		15,056		1,884
States and political    subdivisions		8		2,308		184		464		37		2,772		221
Asset backed securities		1		13,010		361		—		—		13,010		361
Other securities		3		4,871		291		2,534		467		7,405		758
Total		179	$	818,115	$	29,153	$	698,341	$	64,771	$	1,516,456	$	93,924

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Loans Held for Investment and Allowance for Credit Losses on Loans (Tables)

12 Months Ended

Dec. 31, 2023

Receivables [Abstract]

Summary of Loans Held for Investment by Portfolio Segment

Loans held for investment are summarized by portfolio segment as follows:

	December 31,
	2023		2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	960,944	$	908,494
Commercial real estate non-owner occupied		1,486,420		1,383,150
Construction and development < 60 months		642,643		475,236
Construction residential real estate < 60 months		283,486		303,305
Residential real estate first lien		1,258,744		1,117,899
Residential real estate all other		244,696		196,198
Agriculture		427,139		408,037
Commercial non-real estate		1,289,452		1,241,454
Consumer non-real estate		476,467		446,756
Oil and gas		586,654		463,034
Total (1)	$	7,656,645	$	6,943,563
(1) Excludes accrued interest receivable of $39.4 million at December 31, 2023 and $30.6 million at December 31, 2022, that is recorded in accrued interest
receivable and other assets.

Schedule of Portfolio Segments Weighted Average Life, and Measures the Allowance for Credit Losses

The Company has identified the following portfolio segments, which includes the applicable weighted average remaining life, and measures the allowance for credit losses using the vintage loss analysis adjusted for qualitative factors:

Portfolio Segments	Life (in years)
Real estate:
Commercial real estate owner occupied		9
Commercial real estate non-owner occupied		6
Construction and development < 60 months		3
Construction residential real estate < 60 months		2
Residential real estate first lien		15
Residential real estate all other		8
Agriculture		9
Commercial non-real estate		4
Consumer non-real estate		4
Oil and gas		2

Summary of Other Real Estate Owned and Repossessed Assets

The following is a summary of other real estate owned and repossessed assets:

	December 31,
	2023		2022
	(Dollars in thousands)
Other real estate owned and repossessed assets	$	34,200	$	36,936

Summary of Rental Income and Operating Expenses

This property had the following rental income and operating expenses for the periods presented.

	For the Twelve Months Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Rental income	$	11,224	$	10,340	$	9,975
Operating expense		10,868		9,863		8,727

Summary of Amounts Included in Nonaccrual Loans Segregated by Portfolio Segment

The following table is a summary of amounts included in nonaccrual loans, segregated by portfolio segment.

	December 31, 2023		December 31, 2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	1,686	$	1,795
Commercial real estate non-owner occupied		874		667
Construction and development < 60 months		800		93
Construction residential real estate < 60 months		638		430
Residential real estate first lien		3,336		1,947
Residential real estate all other		899		55
Agriculture		3,662		2,734
Commercial non-real estate		10,101		7,066
Consumer non-real estate		449		192
Oil and gas		2,128		320
Total	$	24,573	$	15,299

Age Analysis of Loans Held for Investments

Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. The following table presents an age analysis of the Company's loans held for investment:

	Age Analysis of Past Due Loans
	30-59 Days Past Due		60-89 Days Past Due		90 Days and Greater		Total Past Due Loans		Current Loans		Total Loans		Accruing Loans 90 Days or More Past Due
	(Dollars in thousands)
December 31, 2023
Real estate:
Commercial real estate owner    occupied	$	1,386	$	26	$	5,598	$	7,010	$	953,934	$	960,944	$	4,377
Commercial real estate non-owner    occupied		2,224		7,371		1,786		11,381		1,475,039		1,486,420		913
Construction and development <60    months		198		158		800		1,156		641,487		642,643		—
Construction residential real estate    < 60 months		1,542		206		405		2,153		281,333		283,486		332
Residential real estate first lien		3,879		1,204		1,849		6,932		1,251,812		1,258,744		731
Residential real estate all other		757		190		613		1,560		243,136		244,696		549
Agriculture		1,694		724		1,227		3,645		423,494		427,139		579
Commercial non-real estate		1,501		436		10,028		11,965		1,277,487		1,289,452		1,714
Consumer non-real estate		3,248		1,090		594		4,932		471,535		476,467		347
Oil and gas		—		—		92		92		586,562		586,654		—
Total	$	16,429	$	11,405	$	22,992	$	50,826	$	7,605,819	$	7,656,645	$	9,542
	30-59 Days Past Due		60-89 Days Past Due		90 Days and Greater		Total Past Due Loans		Current Loans		Total Loans		Accruing Loans 90 Days or More Past Due
	(Dollars in thousands)
December 31, 2022
Real estate:
Commercial real estate owner    occupied	$	1,314	$	1,524	$	4,580	$	7,418	$	901,076	$	908,494	$	4,580
Commercial real estate non-owner    occupied		6,237		—		42		6,279		1,376,871		1,383,150		43
Construction and development <60    months		535		40		114		689		474,547		475,236		81
Construction residential real estate    < 60 months		1,320		282		148		1,750		301,555		303,305		—
Residential real estate first lien		3,415		1,076		844		5,335		1,112,564		1,117,899		349
Residential real estate all other		265		37		185		487		195,711		196,198		166
Agriculture		2,357		34		2,265		4,656		403,381		408,037		1,054
Commercial non-real estate		2,490		2,142		2,772		7,404		1,234,050		1,241,454		345
Consumer non-real estate		2,591		648		585		3,824		442,932		446,756		467
Oil and gas		654		—		—		654		462,380		463,034		—
Total	$	21,178	$	5,783	$	11,535	$	38,496	$	6,905,067	$	6,943,563	$	7,085

Gross Loans Held for Investment by Year of Origination and Internally Assigned Credit Grades

The following tables summarizes the Company's gross loans held for investment by year of origination and internally assigned credit grades:

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
	(Dollars in thousands)
December 31, 2023
Commercial real estate owner occupied
Grade 1	$	125,041	$	144,429	$	124,113	$	85,619	$	77,400	$	135,064	$	23,004	$	714,670
Grade 2		39,735		61,879		28,506		22,473		19,617		24,199		33,304		229,713
Grade 3		140		3,580		4,262		644		1,432		1,051		2,450		13,559
Grade 4		399		90		—		352		656		1,016		150		2,663
Grade 5		—		—		—		—		339		—		—		339
Total commercial real estate owner occupied		165,315		209,978		156,881		109,088		99,444		161,330		58,908		960,944
Commercial real estate non-owner occupied
Grade 1		221,014		271,637		172,291		113,676		56,831		68,576		44,878		948,903
Grade 2		82,206		139,982		79,204		53,154		63,331		72,075		28,844		518,796
Grade 3		2,135		6,666		1,715		—		6,207		251		—		16,974
Grade 4		200		632		349		—		—		566		—		1,747
Total commercial real estate non-owner occupied		305,555		418,917		253,559		166,830		126,369		141,468		73,722		1,486,420
Construction and development < 60 months
Grade 1		124,218		133,254		65,472		5,828		3,392		5,019		76,831		414,014
Grade 2		95,138		43,884		28,772		6,625		13,406		2,146		34,559		224,530
Grade 3		2,051		893		101		235		—		19		—		3,299
Grade 4		—		800		—		—		—		—		—		800
Total construction and development < 60 months		221,407		178,831		94,345		12,688		16,798		7,184		111,390		642,643
Construction residential real estate < 60 months
Grade 1		158,161		7,551		1,421		100		105		467		49,284		217,089
Grade 2		57,172		2,365		27		12		—		—		98		59,674
Grade 3		5,457		387		—		—		—		—		—		5,844
Grade 4		673		206		—		—		—		—		—		879
Total construction residential real estate <60 months		221,463		10,509		1,448		112		105		467		49,382		283,486
Residential real estate first lien
Grade 1		294,363		226,557		174,325		115,055		71,941		149,836		6,047		1,038,124
Grade 2		51,619		39,146		35,226		24,738		12,591		39,264		—		202,584
Grade 3		2,175		2,187		2,630		773		1,140		4,009		—		12,914
Grade 4		759		122		1,144		651		355		2,091		—		5,122
Total residential real estate first lien		348,916		268,012		213,325		141,217		86,027		195,200		6,047		1,258,744
Residential real estate all other
Grade 1		44,475		24,861		8,381		8,122		3,753		12,827		46,479		148,898
Grade 2		4,244		5,819		1,415		1,652		1,308		2,527		74,388		91,353
Grade 3		355		262		198		40		23		391		1,942		3,211
Grade 4		119		24		—		—		55		89		947		1,234
Total residential real estate all other		49,193		30,966		9,994		9,814		5,139		15,834		123,756		244,696
Agriculture
Grade 1		52,934		51,099		34,840		26,603		17,863		33,052		46,981		263,372
Grade 2		28,829		20,931		18,245		9,826		8,207		15,833		41,018		142,889
Grade 3		9,516		1,185		789		2,570		296		2,372		2,454		19,182
Grade 4		265		633		55		131		370		241		1		1,696
Total agriculture		91,544		73,848		53,929		39,130		26,736		51,498		90,454		427,139
Commercial non-real estate
Grade 1		252,112		176,013		159,470		39,097		36,907		33,824		277,740		975,163
Grade 2		95,590		35,955		19,519		6,591		6,456		8,071		127,800		299,982
Grade 3		2,206		2,598		1,011		109		121		164		1,779		7,988
Grade 4		1,181		1,691		400		686		309		154		1,425		5,846
Grade 5		—		—		—		—		473		—		—		473
Total commercial non-real estate		351,089		216,257		180,400		46,483		44,266		42,213		408,744		1,289,452
Consumer non-real estate
Grade 1		211,028		105,365		55,079		18,529		8,939		3,301		22,184		424,425
Grade 2		19,085		14,919		6,764		2,062		702		910		2,085		46,527
Grade 3		941		1,424		932		326		299		156		11		4,089
Grade 4		361		452		409		117		72		10		5		1,426
Total consumer non-real estate		231,415		122,160		63,184		21,034		10,012		4,377		24,285		476,467
Oil and gas
Grade 1		147,902		29,658		72,127		13,898		1,553		15,015		180,321		460,474
Grade 2		66,080		4,851		1,019		402		279		177		50,201		123,009
Grade 3		1,758		132		225		—		—		—		323		2,438
Grade 4		313		83		166		—		10		161		—		733
Total oil and gas		216,053		34,724		73,537		14,300		1,842		15,353		230,845		586,654
Total loans held for investment	$	2,201,950	$	1,564,202	$	1,100,602	$	560,696	$	416,738	$	634,924	$	1,177,533	$	7,656,645

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
	2022		2021		2020		2019		2018		Prior		Amortized Cost Basis		Total
	(Dollars in thousands)
December 31, 2022
Commercial real estate owner occupied
Grade 1	$	173,596	$	145,425	$	106,285	$	91,892	$	44,086	$	119,755	$	53,026	$	734,065
Grade 2		34,774		34,283		27,153		17,999		8,528		29,638		14,737		167,112
Grade 3		235		1,718		387		1,334		332		1,161		62		5,229
Grade 4		40		269		—		1,110		180		489		—		2,088
Total commercial real estate owner occupied		208,645		181,695		133,825		112,335		53,126		151,043		67,825		908,494
Commercial real estate non-owner occupied
Grade 1		349,333		239,369		170,186		107,983		24,075		66,546		45,372		1,002,864
Grade 2		115,372		50,573		29,031		46,870		24,877		69,601		31,928		368,252
Grade 3		7,677		—		153		2,733		64		1,318		—		11,945
Grade 4		—		—		—		—		42		47		—		89
Total commercial real estate non-owner occupied		472,382		289,942		199,370		157,586		49,058		137,512		77,300		1,383,150
Construction and development < 60 months
Grade 1		164,865		92,595		39,819		5,558		3,146		4,993		40,474		351,450
Grade 2		36,090		20,273		1,413		14,248		1,648		774		47,973		122,419
Grade 3		967		—		141		—		—		8		158		1,274
Grade 4		—		—		33		47		—		13		—		93
Total construction and development < 60 months		201,922		112,868		41,406		19,853		4,794		5,788		88,605		475,236
Construction residential real estate < 60 months
Grade 1		209,699		12,612		259		18		—		42		36,114		258,744
Grade 2		39,174		1,152		102		—		—		400		2,091		42,919
Grade 3		1,212		—		—		—		—		—		—		1,212
Grade 4		420		10		—		—		—		—		—		430
Total construction residential real estate < 60 months		250,505		13,774		361		18		—		442		38,205		303,305
Residential real estate first lien
Grade 1		303,369		205,377		141,752		85,850		55,631		136,776		4,242		932,997
Grade 2		46,751		36,453		25,623		13,414		11,687		37,167		—		171,095
Grade 3		1,940		1,903		1,065		1,689		497		3,826		—		10,920
Grade 4		55		311		175		386		144		1,816		—		2,887
Total residential real estate first lien		352,115		244,044		168,615		101,339		67,959		179,585		4,242		1,117,899
Residential real estate all other
Grade 1		31,741		11,012		10,696		5,458		3,607		11,198		41,653		115,365
Grade 2		5,683		1,887		1,744		1,589		1,237		2,574		62,395		77,109
Grade 3		381		186		71		50		201		786		1,828		3,503
Grade 4		—		18		28		32		39		53		51		221
Total residential real estate all other		37,805		13,103		12,539		7,129		5,084		14,611		105,927		196,198
Agriculture
Grade 1		73,722		44,037		35,684		22,094		12,064		31,517		42,542		261,660
Grade 2		28,351		22,773		9,638		10,548		6,025		15,233		33,844		126,412
Grade 3		6,435		476		3,427		140		320		2,703		4,452		17,953
Grade 4		660		221		498		80		144		393		16		2,012
Total agriculture		109,168		67,507		49,247		32,862		18,553		49,846		80,854		408,037
Commercial non-real estate
Grade 1		282,252		205,516		67,229		50,725		13,780		40,989		280,774		941,265
Grade 2		88,017		46,604		17,420		11,447		15,628		3,582		105,783		288,481
Grade 3		2,093		461		346		738		1,566		180		2,544		7,928
Grade 4		240		415		656		745		348		929		183		3,516
Grade 5		—		—		—		264		—		—		—		264
Total commercial non-real estate		372,602		252,996		85,651		63,919		31,322		45,680		389,284		1,241,454
Consumer non-real estate
Grade 1		203,238		104,380		39,779		21,035		6,589		2,187		26,263		403,471
Grade 2		21,011		10,538		3,978		1,541		822		1,340		825		40,055
Grade 3		827		671		405		282		134		63		4		2,386
Grade 4		229		351		54		141		56		13		—		844
Total consumer non-real estate		225,305		115,940		44,216		22,999		7,601		3,603		27,092		446,756
Oil and gas
Grade 1		24,303		125,209		16,482		682		1,678		880		199,995		369,229
Grade 2		7,610		10,668		766		23,040		3,167		327		45,240		90,818
Grade 3		2,117		47		5		—		—		—		498		2,667
Grade 4		—		320		—		—		—		—		—		320
Total oil and gas		34,030		136,244		17,253		23,722		4,845		1,207		245,733		463,034
Total loans held for investment	$	2,264,479	$	1,428,113	$	752,483	$	541,762	$	242,342	$	589,317	$	1,125,067	$	6,943,563

Gross Charge-offs by Year of Origination

The following tables summarize the Company’s gross charge-offs by year of origination for the periods indicated:

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
	(Dollars in thousands)
Year ended December 31, 2023
Commercial real estate owner occupied
Current-period gross charge-offs	$	174	$	196	$	26	$	203	$	165	$	158	$	—	$	922
Commercial real estate non-owner occupied
Current-period gross charge-offs		—		—		—		—		—		3		—		3
Construction and development < 60 months
Current-period gross charge-offs		—		3		—		2		—		1		—		6
Construction residential real estate < 60 months
Current-period gross charge-offs		—		94		—		—		—		—		—		94
Residential real estate first lien
Current-period gross charge-offs		—		—		91		44		5		25		—		165
Residential real estate all other
Current-period gross charge-offs		—		4		19		—		1		36		—		60
Agriculture
Current-period gross charge-offs		—		154		9		317		14		2		—		496
Commercial non-real estate
Current-period gross charge-offs		390		351		111		22		51		160		—		1,085
Consumer non-real estate
Current-period gross charge-offs		312		632		261		45		41		40		19		1,350
Oil and gas
Current-period gross charge-offs		57		2		—		—		—		—		—		59
Total current-period gross charge-offs	$	933	$	1,436	$	517	$	633	$	277	$	425	$	19	$	4,240

Activity in Allowance for Credit Losses on Loans

The following table details activity in the allowance for credit losses on loans for the period presented. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories.

	Allowance for Credit Losses
	Balance at beginning of period		Charge- offs			Recoveries		Net charge-offs			Provision for/(benefit from) credit losses on loans			Balance at end of period
	(Dollars in thousands)
Year ended December 31, 2023
Real estate:
Commercial real estate owner occupied	$	6,416	$	(922	)	$	68	$	(854	)	$	1,921		$	7,483
Commercial real estate non-owner occupied		30,190		(3	)		—		(3	)		2,893			33,080
Construction and development < 60 months		3,778		(6	)		11		5			167			3,950
Construction residential real estate < 60 months		3,275		(94	)		—		(94	)		233			3,414
Residential real estate first lien		4,092		(165	)		15		(150	)		972			4,914
Residential real estate all other		1,418		(60	)		5		(55	)		283			1,646
Agriculture		6,217		(496	)		127		(369	)		289			6,137
Commercial non-real estate		25,106		(1,085	)		446		(639	)		(1,722	)		22,745
Consumer non-real estate		4,132		(1,350	)		182		(1,168	)		1,437			4,401
Oil and gas		8,104		(59	)		—		(59	)		985			9,030
Total	$	92,728	$	(4,240	)	$	854	$	(3,386	)	$	7,458		$	96,800

	Allowance for Credit Losses
	Balance at beginning of period		Initial allowance on loans purchased with credit deterioration		Charge- offs			Recoveries		Net charge-offs			Provision for/(benefit from) credit losses on loans			Balance at end of period
	(Dollars in thousands)
Year ended December 31, 2022
Real estate:
Commercial real estate owner occupied	$	7,550	$	—	$	(20	)	$	507	$	487		$	(1,621	)	$	6,416
Commercial real estate non-owner occupied		16,807		—		—			—		—			13,383			30,190
Construction and development < 60 months		3,454		—		(93	)		12		(81	)		405			3,778
Construction residential real estate    < 60 months		1,051		—		—			—		—			2,224			3,275
Residential real estate first lien		3,048		2		(106	)		87		(19	)		1,061			4,092
Residential real estate all other		1,567		—		(38	)		405		367			(516	)		1,418
Agriculture		8,392		—		(205	)		13		(192	)		(1,983	)		6,217
Commercial non-real estate		25,565		44		(1,551	)		209		(1,342	)		839			25,106
Consumer non-real estate		3,694		25		(768	)		193		(575	)		988			4,132
Oil and gas		12,808		—		—			—		—			(4,704	)		8,104
Total	$	83,936	$	71	$	(2,781	)	$	1,426	$	(1,355	)	$	10,076		$	92,728

Purchased Credit Deteriorated Loans

The Company has purchased loans, for which there was, at acquisition, evidence of more than insignificant deterioration of credit quality since origination. The Company did not purchase credit-deteriorated loans during the year ended December 31, 2023. The credit-deteriorated loans purchased during the year ended December 31, 2022 were as follows:

	Loans acquired with deteriorated credit quality
	(Dollars in thousands)
For the year ended December 31, 2022
Purchase price of loans at acquisition	$	668
Allowance for credit losses at acquisition		71
Par value of acquired loans at acquisition	$	739

Collateral-Dependent Gross Loans Held for Investment by Collateral Type and Related Specific Allocation

The following table summarizes collateral-dependent gross loans held for investment by collateral type and the related specific allocation as follows:

	Collateral Type
	Real Estate		Business Assets		Energy Reserves		Other Assets		Total		Specific Allocation
As of December 31, 2023	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate non-owner occupied		632		—		—		—		632		250
Construction and development < 60 months		800		—		—		—		800		225
Construction residential real estate < 60 months		638		—		—		—		638		134
Residential real estate first lien		189		—		—		—		189		62
Residential real estate all other		140		—		—		—		140		140
Agriculture		1,841		593		—		15		2,449		1,386
Commercial non-real estate		—		6,090		—		241		6,331		1,867
Consumer non-real estate		—		—		—		147		147		88
Oil and gas		—		—		—		—		—		—
Total collateral-dependent loans held for investment	$	4,240	$	6,683	$	—	$	403	$	11,326	$	4,152
	Collateral Type
	Real Estate		Business Assets		Energy Reserves		Other Assets		Total		Specific Allocation
As of December 31, 2022	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	2,213	$	—	$	—	$	—	$	2,213	$	870
Commercial real estate non-owner occupied		1,263		—		—		—		1,263		333
Construction and development < 60 months		—		—		—		—		—		—
Construction residential real estate < 60 months		420		—		—		—		420		45
Residential real estate first lien		481		—		—		—		481		207
Residential real estate all other		9		—		—		—		9		9
Agriculture		3,447		701		—		3,592		7,740		3,114
Commercial non-real estate		—		5,924		—		4		5,928		1,938
Consumer non-real estate		—		—		—		117		117		81
Oil and gas		—		—		—		—		—		—
Total collateral-dependent loans held for investment	$	7,833	$	6,625	$	—	$	3,713	$	18,171	$	6,597

Transfers from Loans and Premises and Equipment to Other Real Estate Owned, Repossessed Assets and Other Assets

Transfers from loans and premises and equipment to other real estate owned, repossessed assets, and other assets during the periods presented are summarized as follows:

	Year ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Other real estate owned	$	3,459	$	2,563	$	12,651
Repossessed assets		2,019		1,040		844
Other assets		—		1,943		—
Total	$	5,478	$	5,546	$	13,495

Related Party Loans

A summary of these loans is as follows:

Year Ended December 31,	Balance Beginning of the Period		Additions		Collections/ Terminations			Balance End of the Period
	(Dollars in thousands)
2023	$	23,167	$	106,819	$	(45,722	)	$	84,264
2022		28,292		46,124		(51,249	)		23,167
2021		22,057		31,574		(25,339	)		28,292

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Premises and Equipment, Net and Other Assets (Tables)

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Summary of Premises and Equipment by Classification

The following is a summary of premises and equipment by classification:

		December 31,
	Estimated Useful Lives	2023			2022
		(Dollars in thousands)
Land		$	49,173		$	47,856
Buildings	10 to 40 years		288,391			266,660
Furniture, fixtures and equipment	3 to 15 years		94,851			91,340
Construction in progress			4,213			16,613
Accumulated depreciation			(158,034	)		(144,381	)
Premises and equipment, net		$	278,594		$	278,088

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Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

The following is a summary of intangible assets:

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Dollars in thousands)
As of December 31, 2023
Core deposit intangibles	$	33,550	$	(17,027	)	$	16,523
Customer relationship intangibles		3,350		(3,169	)		181
Total	$	36,900	$	(20,196	)	$	16,704
As of December 31, 2022
Core deposit intangibles	$	33,298	$	(13,615	)	$	19,683
Customer relationship intangibles		3,350		(3,050	)		300
Total	$	36,648	$	(16,665	)	$	19,983

Estimated Amortization of Intangible Assets

Estimated amortization of intangible assets for the next five years, as of December 31, 2023, is as follows (dollars in thousands):

Estimated Amortization
2024	$	3,474
2025		3,249
2026		2,645
2027		2,641
2028		1,821

Summary of Goodwill by Business Segment

The following is a summary of goodwill by business segment:

	BancFirst Metropolitan Banks		BancFirst Community Banks		Pegasus		Worthington		Other Financial Services		Executive, Operations & Support		Consolidated
	(Dollars in thousands)
Year Ended December 31, 2023
Balance at beginning of period	$	13,767	$	61,212	$	68,855	$	32,133	$	5,464	$	624	$	182,055
Acquisitions		—		208		—		—		—		—		208
Balance at end of period	$	13,767	$	61,420	$	68,855	$	32,133	$	5,464	$	624	$	182,263
Year Ended December 31, 2022
Balance at beginning of period	$	13,767	$	61,212	$	68,855	$	—	$	5,464	$	624	$	149,922
Acquisitions		—		—		—		32,133		—		—		32,133
Balance at end of period	$	13,767	$	61,212	$	68,855	$	32,133	$	5,464	$	624	$	182,055

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Deposits (Tables)

12 Months Ended

Dec. 31, 2023

Deposits [Abstract]

Schedule of Year-end deposits

Year-end deposits were as follows:

	December 31,
	2023		2022
	(Dollars in thousands)
Noninterest-bearing demand deposits	$	3,982,226	$	4,944,730
Money market and interest-bearing checking deposits		4,699,865		4,173,268
Savings deposits		1,056,404		1,143,176
Time deposits		961,627		713,054
Total deposits	$	10,700,122	$	10,974,228

Schedule of Maturities of Time Deposits

At December 31, 2023, the scheduled maturities of all time deposits are as follows (Dollars in thousands):

2024	$	774,008
2025		120,976
2026		27,347
2027		17,093
2028		22,199
Thereafter		4
Total	$	961,627

Summary of time Deposits Meet or Exceed Current Federal Deposit Insurance Corporation Insurance Limit for Periods Presented

The following table is a summary of time deposits that meet or exceed the current Federal Deposit Insurance Corporation ("FDIC") insurance limit for the periods presented:

	December 31,
	2023		2022
	(Dollars in thousands)
Time deposits of $250,000 or more	$	299,018	$	224,517

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Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2023

Short-Term Debt [Abstract]

Summary of Short-Term Borrowings

The following is a summary of short-term borrowings:

	December 31,
	2023			2022
	(Dollars in thousands)
Federal funds purchased	$	2,525		$	300
Repurchase agreements		826			—
Total short-term borrowings	$	3,351		$	300
Weighted average interest rate		4.84	%		1.39	%
End of period interest rate		4.06	%		4.30	%

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Components of the Company's Income Tax Expense (Benefit)

The components of the Company’s income tax expense (benefit) are as follows:

	Year Ended December 31,
	2023			2022		2021
	(Dollars in thousands)
Current taxes:
Federal	$	53,247		$	39,197	$	28,359
State		7,023			4,813		5,365
Deferred taxes		(2,787	)		322		7,044
Total income taxes	$	57,483		$	44,332	$	40,768

Reconciliation of Tax Expense at the Federal Statutory Tax Rate

A reconciliation of tax expense at the federal statutory tax rate applied to income before taxes is presented in the following table. The federal statutory tax rate was 21% in 2023, 2022 and 2021:

	Year Ended December 31,
	2023			2022			2021
	(Dollars in thousands)
Tax expense at the federal statutory tax rate	$	56,689		$	49,861		$	43,764
Increase (decrease) in tax expense from:
Tax-exempt income, net		(343	)		(337	)		(436	)
Modified endowment life contracts		(497	)		(487	)		(501	)
Share based compensation excess tax benefit		(786	)		(2,905	)		(1,643	)
Tax deductible dividends paid on ESOP		(505	)		(481	)		(490	)
State tax expense, net of federal tax benefit		4,945			3,788			4,779
Bargain purchase gain		—			—			(1,007	)
Utilization of tax credits:
New markets tax credits, net of amortization		(777	)		(3,745	)		(3,192	)
Low-income housing tax credits, net of amortization		(1,106	)		(1,024	)		(1,533	)
Other tax credits, net of amortization		(192	)		(91	)		(379	)
Other, net		55			(247	)		1,406
Total tax expense	$	57,483		$	44,332		$	40,768

Summary of Net Deferred Tax Asset Reported in Other Assets

The net deferred tax asset consisted of the following and is reported in other assets:

	December 31,
	2023			2022
	(Dollars in thousands)
Unrealized net losses on securities	$	15,473		$	22,107
Provision for credit losses		22,782			20,988
Write-downs of other real estate owned		2,522			938
Deferred compensation		2,116			2,142
Stock-based compensation		2,199			1,643
Investments in partnership interests		7,260			6,056
Other		911			1,123
Gross deferred tax assets		53,263			54,997
Intangibles		(5,639	)		(6,346	)
Basis difference related to tax credits		(5,462	)		(4,118	)
Depreciation		(21,833	)		(20,360	)
Prepaid expense deducted		(1,243	)		(1,139	)
Other		(181	)		(283	)
Gross deferred tax liabilities		(34,358	)		(32,246	)
Net deferred tax asset	$	18,905		$	22,751

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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Activity Under RSU Plan

The following table is a summary of the activity under the Company's RSU plan.

			Wgtd. Avg.
	Restricted		Grant Date
	Stock Units		Fair Value
Year Ended December 31, 2023
Nonvested at December 31, 2022		—
Granted		32,075	$	87.23
Nonvested at December 31, 2023		32,075

Summary of Accumulated Stock Units

A summary of the accumulated stock units is as follows:

	December 31,
	2023		2022
Accumulated stock units		119,575		129,609
Average price	$	40.03	$	34.91

Summary of Activity Under Stock Option Plan

The following table is a summary of the activity under both the Employee Plan and the Non-Employee Directors’ Plan:

						Wgtd. Avg.
				Wgtd. Avg.		Remaining	Aggregate
				Exercise		Contractual	Intrinsic
	Options			Price		Term	Value
	(Dollars in thousands, except option data)
Year Ended December 31, 2023
Outstanding at December 31, 2022		1,310,290		$	52.51
Options exercised		(60,024	)		34.83
Options canceled, forfeited, or expired		(8,875	)		86.42
Outstanding at December 31, 2023		1,241,391			53.12	9.70Yrs	$	54,882
Exercisable at December 31, 2023		524,016			34.53	6.39Yrs	$	32,908
Year Ended December 31, 2022
Outstanding at December 31, 2021		1,303,250		$	40.90
Options granted		278,500			87.13
Options exercised		(241,460	)		28.06
Options canceled, forfeited, or expired		(30,000	)		66.31
Outstanding at December 31, 2022		1,310,290			52.51	8.73Yrs	$	46,741
Exercisable at December 31, 2022		489,540			30.82	6.80Yrs	$	28,082

Options Exercised Under Stock Option Plan

The following table has additional information regarding options exercised under both the Employee Plan and the Non-Employee Directors’ Plan:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Total intrinsic value of options exercised	$	3,055	$	14,837	$	9,264
Cash received from options exercised		2,090		6,776		5,015
Tax benefit realized from options exercised		734		3,567		2,360

Assumptions Used for Computing Stock-Based Compensation Expense

he following table shows the assumptions used for computing stock-based compensation expense under the fair value method on options granted during the periods presented:

	Year Ended December 31,
	2022		2021
Weighted average grant-date fair value per share of options granted	$	31.90	$	21.16
Risk-free interest rate	1.75 to 4.17%		1.30 to 1.74%
Dividend yield	2.00%		2.00%
Stock price volatility	34.61 to 35.60%		35.55 to 36.39%
Expected term	10 Yrs		10 Yrs

Stock-based Employee Compensation Expense

The components of stock-based compensation expense for all share-based compensation plans and related tax benefits are as follows:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Stock-based compensation expense	$	2,999	$	1,941	$	2,133
Tax benefit		721		467		513
Stock-based compensation expense, net of tax	$	2,278	$	1,474	$	1,620

Unearned Stock-based Compensation Expense

	December 31, 2023
	(Dollars in thousands)
Unearned stock-based compensation expense for unvested stock options	$	10,316
Unearned stock-based compensation expense for unvested RSU's		2,672

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Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Aggregate Amounts of Contributions to the 401(k) and ESOP Plans

The aggregate amounts of contributions by the Company to the 401(k) and ESOP are shown in the following table:

	December 31,
	2023		2022		2021
	(Dollars in thousands)
401(k) contributions	$	3,410	$	3,011	$	2,856
ESOP contributions		5,747		4,807		4,317
Total contributions	$	9,157	$	7,818	$	7,173

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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Summary of Authorized Outstanding Preferred and Common Stock

As of December 31, 2023, 2022 and 2021 the Company’s authorized and outstanding preferred and common stock was as follows:

	No. of Shares Authorized at		No. of Shares Outstanding at December 31,						Par Value
Class of Stock	December 31, 2023		2023		2022		2021		Per Share		Dividends	Voting Rights
Senior Preferred		10,000,000		—		—		—	$	1.00	As declared	Voting
10% Cumulative Preferred		900,000		—		—		—		5.00	As declared	Non-voting
Common		40,000,000		32,933,018		32,875,560		32,603,118		1.00	As declared	Voting

Summary of Shares Repurchased Under Stock Purchase Program

The following table is a summary of the shares purchased under the program and the shares remaining to be repurchased in the program:

	Year Ended December 31,
	2023		2022		2021
Number of shares repurchased		20,702		—		212,296
Average price of shares repurchased	$	87.88	$	—	$	54.94
Shares remaining to be repurchased		479,784		500,486		500,486

Required Capital Amounts and Company's Respective Ratios

The actual and required capital amounts and ratios are shown in the following table:

	Actual					Required For Capital Adequacy Purposes					With Capital Conservation Buffer					To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio			Amount		Ratio			Amount		Ratio			Amount		Ratio
	(Dollars in thousands)
As of December 31, 2023:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,467,062		16.90	%	$	694,520		8.00	%	$	911,558		10.50	%	N/A		N/A
BancFirst		1,166,750		15.68	%		595,191		8.00	%		781,189		10.50	%	$	743,989		10.00	%
Pegasus		139,472		16.98	%		65,706		8.00	%		86,239		10.50	%		82,132		10.00	%
Worthington		51,608		12.30	%		33,571		8.00	%		44,061		10.50	%		41,963		10.00	%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,284,966		14.80	%	$	390,668		4.50	%	$	607,705		7.00	%	N/A		N/A
BancFirst		1,061,943		14.27	%		334,795		4.50	%		520,792		7.00	%	$	483,593		6.50	%
Pegasus		130,792		15.92	%		36,959		4.50	%		57,492		7.00	%		53,386		6.50	%
Worthington		47,690		11.36	%		18,883		4.50	%		29,374		7.00	%		27,276		6.50	%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,310,966		15.10	%	$	520,890		6.00	%	$	737,928		8.50	%	N/A		N/A
BancFirst		1,081,943		14.54	%		446,393		6.00	%		632,391		8.50	%	$	595,191		8.00	%
Pegasus		130,792		15.92	%		49,279		6.00	%		69,812		8.50	%		65,706		8.00	%
Worthington		47,690		11.36	%		25,178		6.00	%		35,669		8.50	%		33,571		8.00	%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	1,310,966		10.76	%	$	487,279		4.00	%	N/A		N/A			N/A		N/A
BancFirst		1,081,943		10.43	%		414,882		4.00	%	N/A		N/A			$	518,603		5.00	%
Pegasus		130,792		10.56	%		49,529		4.00	%	N/A		N/A				61,911		5.00	%
Worthington		47,690		8.62	%		22,140		4.00	%	N/A		N/A				27,675		5.00	%
As of December 31, 2022:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,298,329		16.61	%	$	625,387		8.00	%	$	820,821		10.50	%	N/A		N/A
BancFirst		1,092,098		16.68	%		523,932		8.00	%		687,661		10.50	%	$	654,916		10.00	%
Pegasus		117,445		12.91	%		77,802		8.00	%		95,553		10.50	%		91,003		10.00	%
Worthington		47,554		14.09	%		27,006		8.00	%		35,446		10.50	%		33,758		10.00	%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,120,361		14.33	%	$	351,780		4.50	%	$	547,214		7.00	%	N/A		N/A
BancFirst		991,050		15.13	%		294,712		4.50	%		458,441		7.00	%	$	425,695		6.50	%
Pegasus		108,437		11.92	%		40,951		4.50	%		63,702		7.00	%		59,152		6.50	%
Worthington		44,207		13.10	%		15,191		4.50	%		23,631		7.00	%		21,943		6.50	%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,146,361		14.66	%	$	469,041		6.00	%	$	664,474		8.50	%	N/A		N/A
BancFirst		1,011,050		15.44	%		392,949		6.00	%		556,678		8.50	%	$	523,932		8.00	%
Pegasus		108,437		11.92	%		54,602		6.00	%		77,352		8.50	%		72,802		8.00	%
Worthington		44,207		13.10	%		20,255		6.00	%		28,694		8.50	%		27,006		8.00	%
Tier 1 Capital
(to Total Assets)-
BancFirst Corporation	$	1,146,361		9.30	%	$	493,191		4.00	%	N/A		N/A			N/A		N/A
BancFirst		1,011,050		9.72	%		416,004		4.00	%	N/A		N/A			$	520,005		5.00	%
Pegasus		108,437		8.00	%		54,238		4.00	%	N/A		N/A				67,798		5.00	%
Worthington		44,207		8.53	%		20,738		4.00	%	N/A		N/A				25,922		5.00	%

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Net Income Per Common Share (Tables)

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Basic and Diluted Net Income Per Common Share

Basic and diluted net income per common share are calculated as follows:

	Year ended December 31,
	2023		2022		2021
	(Dollars in thousands, except per share data)
(Numerator)
Income available to common stockholders	$	212,465	$	193,100	$	167,630
(Denominator)
Weighted-average shares outstanding for basic earnings per common share		32,919,348		32,778,355		32,716,099
Dilutive effect of stock compensation		575,139		661,141		598,047
Weighted-average shares outstanding for diluted earnings per common share		33,494,487		33,439,496		33,314,146
Basic earnings per share	$	6.45	$	5.89	$	5.12
Diluted earnings per share	$	6.34	$	5.77	$	5.03

Average Exercise Price of Options And RSUs Excluded from Computation of Diluted Net Income Per Common Share

The following table shows the number of options and RSU's that were excluded from the computation of diluted net income per common share for each period because they were anti-dilutive for the period:

	Shares
December 31, 2023		280,150
December 31, 2022		155,316
December 31, 2021		189,780

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Condensed Parent Company Financial Statements (Tables)

12 Months Ended

Dec. 31, 2023

Condensed Financial Information Disclosure [Abstract]

Summary of Balance Sheet of Parent Company

BALANCE SHEETS

	December 31,
	2023		2022
	(Dollars in thousands)
ASSETS
Cash	$	91,454	$	17,806
Investments in subsidiaries		1,315,124		1,206,246
Goodwill		101,611		101,611
Core deposit premium		10,428		12,009
Dividends receivable		17,091		15,682
Other assets		2,262		1,731
Total assets	$	1,537,970	$	1,355,085
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	$	17,978	$	18,205
Subordinated debt		86,101		86,044
Stockholders’ equity		1,433,891		1,250,836
Total liabilities and stockholders’ equity	$	1,537,970	$	1,355,085

Summary of Income Statement of Parent Company

STATEMENTS OF INCOME

	Year Ended December 31,
	2023			2022			2021
	(Dollars in thousands)
OPERATING INCOME
Dividends from subsidiaries	$	137,275		$	93,139		$	54,480
Interest on interest-bearing deposits		1,178			94			41
Other		726			1,338			1,071
Total operating income		139,179			94,571			55,592
OPERATING EXPENSE
Interest		4,122			4,122			3,130
Other		3,206			7,190			3,340
Total operating expense		7,328			11,312			6,470
Income before taxes and equity in undistributed earnings of subsidiaries		131,851			83,259			49,122
Allocated income tax benefit		2,249			5,857			4,191
Income before equity in undistributed earnings of subsidiaries		134,100			89,116			53,313
Equity in undistributed earnings of subsidiaries		81,275			105,817			116,365
Amortization of stock-based compensation arrangements of subsidiaries		(2,910	)		(1,833	)		(2,048	)
Net income	$	212,465		$	193,100		$	167,630

Summary of Cash Flow of Parent Company

STATEMENTS OF CASH FLOW

	Year Ended December 31,
	2023			2022			2021
	(Dollars in thousands)
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	212,465		$	193,100		$	167,630
Adjustments to reconcile to net cash provided by operating activities:
Equity in undistributed earnings of subsidiaries		(81,275	)		(105,817	)		(116,365	)
Amortization of stock-based compensation arrangements of subsidiaries		2,910			1,833			2,048
Other, net		(655	)		3,815			5,056
Net cash provided by operating activities		133,445			92,931			58,369
INVESTING ACTIVITIES
Payments for investments in subsidiaries		(6,100	)		(94,967	)		(9,000	)
Other, net		(778	)		(1,352	)		4,429
Net cash used in investing activities		(6,878	)		(96,319	)		(4,571	)
FINANCING ACTIVITIES
Issuance of common stock		2,543			7,649			2,260
Common stock acquired		(1,820	)		—			(11,663	)
Net cash settlement of options		—			—			(5,479	)
Cash dividends paid		(53,642	)		(48,462	)		(45,140	)
Proceeds from the issuance of subordinated notes, net of debt issuance costs		—			—			59,150
Net cash used in financing activities		(52,919	)		(40,813	)		(872	)
Net increase/(decrease) in cash and due from banks		73,648			(44,201	)		52,926
Cash and due from banks at the beginning of the period		17,806			62,007			9,081
Cash and due from banks at the end of the period	$	91,454		$	17,806		$	62,007
SUPPLEMENTAL DISCLOSURE
Cash paid during the period for interest	$	4,122		$	4,122		$	3,130
Cash received during the period for income taxes, net	$	1,746		$	6,667		$	4,411

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Commitments and Contingent Liabilities (Tables)

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Summary of Financial Instruments with Off-Balance-Sheet Risks

The amounts of financial instruments with off-balance-sheet risk are as follows:

	December 31,
	2023		2022
	(Dollars in thousands)
Loan commitments	$	2,785,673	$	2,627,552
Stand-by letters of credit		84,947		72,237

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Leases (Tables)

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Schedule of Rent Expense of Operating Leases

Rental expense on all operating leases, including those rented on a monthly or temporary basis were as follows (Dollars in thousands):

Year Ending December 31:
2023	$	2,066
2022		1,865
2021		1,560

Schedule of Minimum Future Commitments of Operating Leases

The following table presents minimum future commitments by year for the Company’s operating leases. Such commitments are reflected as undiscounted values and are reconciled to the discounted present value recognized on the consolidated balance sheet.

	December 31, 2023
	(Dollars in thousands)
2024	$	2,022
2025		1,653
2026		1,085
2027		731
2028		409
Thereafter		312
Total lease payments		6,212
Less imputed interest		(375	)
Operating lease liability	$	5,837

Scheduled of Minimum Future Contractual Rent To be Received Under The Remaining Non-Cancelable Term of Operating Leases

The following table presents the scheduled minimum future contractual rent to be received under the remaining non-cancelable term of the operating leases:

	December 31, 2023
	(Dollars in thousands)
2024	$	3,555
2025		2,796
2026		2,535
2027		2,181
2028		1,951
2029-2031		4,269
Total future minimum lease payments	$	17,287

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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value of Financial Assets and Liabilities Measured on Recurring Basis

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of the periods presented, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
	(Dollars in thousands)
December 31, 2023
Debt securities available for sale:
U.S. Treasury	$	1,498,045	$	—	$	—	$	1,498,045
U.S. federal agencies		—		11,770		—		11,770
Mortgage-backed securities		—		14,795		—		14,795
States and political subdivisions		—		9,830		180		10,010
Asset backed securities		—		12,512		—		12,512
Other debt securities		—		6,773		—		6,773
Derivative assets		—		41,099		—		41,099
Derivative liabilities		—		39,176		—		39,176
December 31, 2022
Debt securities available for sale:
U.S. Treasury	$	1,477,864	$	—	$	—	$	1,477,864
U.S. federal agencies		—		15,222		—		15,222
Mortgage-backed securities		—		16,586		—		16,586
States and political subdivisions		—		7,680		454		8,134
Asset backed securities		—		13,010		—		13,010
Other debt securities		—		7,405		—		7,405
Derivative assets		—		20,745		—		20,745
Derivative liabilities		—		19,683		—		19,683

Changes in Level 3 Assets Measured at Estimated Fair Value on Recurring Basis

The changes in Level 3 assets measured at estimated fair value on a recurring basis during the periods presented were as follows:

	Twelve Months Ended December 31,
	2023			2022
	(Dollars in thousands)
Balance at the beginning of the year	$	454		$	320
Transfers to level 2		(244	)		—
Purchases		—			255
Settlements		(30	)		(110	)
Total unrealized losses		—			(11	)
Balance at the end of the period	$	180		$	454

Assets Measured at Fair Value on Nonrecurring Basis

	Total Fair Value Level 3
	(Dollars in thousands)
As of and for the Year-to-date Period Ended December 31, 2023
Equity securities	$	13,144
Collateral dependent loans		1,894
Repossessed assets		474
Other real estate owned		31,773
As of and for the Year-to-date Period Ended December 31, 2022
Equity securities	$	15,512
Collateral dependent loans		1,618
Repossessed assets		180
Other real estate owned		34,999

Estimated Fair Values of Financial Instruments

he estimated fair values of the Company’s financial instruments that are reported at amortized cost in the Company’s consolidated balance sheets, segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value, are as follows:

	December 31,
	2023				2022
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(Dollars in thousands)
FINANCIAL ASSETS
Level 2 inputs:
Cash and cash equivalents	$	2,397,463	$	2,397,463	$	3,168,910	$	3,168,910
Federal funds sold		1,316		1,316		2,850		2,850
Debt securities held for investment		5		5		13		13
Loans held for sale		3,489		3,489		6,232		6,232
Level 3 inputs:
Debt securities held for investment		1,185		1,185		2,370		2,370
Loans held for investment, net of allowance for credit losses		7,559,845		7,356,768		6,850,835		6,563,755
FINANCIAL LIABILITIES
Level 2 inputs:
Deposits		10,700,122		10,413,348		10,974,228		10,614,840
Short-term borrowings		3,351		3,351		300		300
Subordinated debt		86,101		79,271		86,044		82,385
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS
Loan commitments				4,875				4,598
Letters of credit				637				542

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Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Summary of Notional Amounts and Estimated Fair Values of Oil and Gas Derivative Positions Outstanding

The Company utilizes dealer quotations and observable market data inputs to substantiate internal valuation models. The notional amounts and estimated fair values of oil and gas derivative positions outstanding are presented in the following table:

		December 31,
		2023						2022
Oil and Natural Gas Swaps and Options	Notional Units	Notional Amount			Estimated Fair Value			Notional Amount			Estimated Fair Value
		(Notional amounts and dollars in thousands)
Oil
Derivative assets	Barrels		3,896		$	20,567			2,698		$	8,868
Derivative liabilities	Barrels		(3,896	)		(19,512	)		(2,698	)		(8,259	)
Gas/Natural Gas Liquids
Derivative assets	MMBTUs/Gallons		46,140			20,532			25,059			11,877
Derivative liabilities	MMBTUs/Gallons		(46,140	)		(19,664	)		(25,059	)		(11,424	)
Total Fair Value	Included in
Derivative assets	Other assets					41,099						20,745
Derivative liabilities	Other liabilities					(39,176	)					(19,683	)

Summary of Company's Recognized Income Related to Activity Included in Other Noninterest Income

The following table is a summary of the Company’s recognized income related to the activity, which was included in other noninterest income:

	Year Ended December 31,
	2023		2022		2021
	(Dollars in thousands)
Derivative income	$	701	$	416	$	266

Summary of Company's Net Credit Exposure Relating to Oil and Gas Swaps and Options with Bank Counterparties

The following table is a summary of the Company’s net credit exposure relating to oil and gas swaps and options with bank counterparties:

	December 31,
	2023		2022
	(Dollars in thousands)
Credit exposure	$	39,527	$	6,560

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Segment Information (Tables)

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Results of Operations and Selected Financial Information

The results of operations and selected financial information for the six business units are as follows:

	BancFirst Metropolitan Banks			BancFirst Community Banks			Pegasus			Worthington			Other Financial Services			Executive, Operations & Support			Eliminations			Consolidated
	(Dollars in thousands)
December 31, 2023
Net interest income	$	120,226		$	229,196		$	51,277		$	17,395		$	4,164		$	2,198		$	—		$	424,456
Provision for/(benefit    from) credit losses		4,836			2,331			(328	)		564			79			(24	)		—			7,458
Noninterest income		24,793			70,824			1,646			1,170			52,711			250,968			(216,704	)		185,408
Depreciation and    amortization		2,347			10,514			804			496			481			7,547			—			22,189
Other expenses		46,329			123,554			20,084			13,636			37,495			70,293			(1,122	)		310,269
Income before taxes	$	91,507		$	163,621		$	32,363		$	3,869		$	18,820		$	175,350		$	(215,582	)	$	269,948
Total assets	$	3,598,888		$	7,012,905		$	1,280,618		$	600,364		$	121,601		$	1,307,714		$	(1,550,048	)	$	12,372,042
Capital expenditures	$	2,752		$	5,156		$	528		$	5,497		$	108		$	8,463		$	—		$	22,504
December 31, 2022
Net interest income	$	97,728		$	208,728		$	46,439		$	14,919		$	8,065		$	(2,226	)	$	20		$	373,673
(Benefit from)/provision    for credit losses		2,186			2,451			2,840			(43	)		(161	)		2,803			—			10,076
Noninterest income		32,756			72,385			1,026			1,034			50,643			223,844			(197,941	)		183,747
Depreciation and    amortization		2,821			10,453			789			398			519			7,068			—			22,048
Other expenses		42,583			117,248			19,013			9,280			36,271			64,325			(856	)		287,864
Income before taxes	$	82,894		$	150,961		$	24,823		$	6,318		$	22,079		$	147,422		$	(197,065	)	$	237,432
Total assets	$	3,412,369		$	6,886,066		$	1,404,033		$	541,002		$	171,679		$	1,473,443		$	(1,500,729	)	$	12,387,863
Capital expenditures	$	2,026		$	10,146		$	311		$	262		$	67		$	6,973		$	—		$	19,785
December 31, 2021
Net interest income	$	77,840		$	180,925		$	24,222		$	—		$	35,244		$	(3,295	)	$	721		$	315,657
Provision for credit losses		(5,474	)		(4,694	)		1,395			—			109			(26	)		—			(8,690	)
Noninterest income		23,257			65,600			1,448			—			47,124			203,005			(170,402	)		170,032
Depreciation and    amortization		2,593			10,483			782			—			557			5,626			—			20,041
Other expenses		39,356			110,574			15,317			—			60,435			41,199			(941	)		265,940
Income before taxes	$	64,622		$	130,162		$	8,176		$	—		$	21,267		$	152,911		$	(168,740	)	$	208,398
Total assets	$	2,627,874		$	5,821,220		$	1,045,699		$	—		$	71,694		$	1,201,974		$	(1,362,849	)	$	9,405,612
Capital expenditures	$	1,612		$	7,390		$	363		$	—		$	400		$	17,486		$	—		$	27,251

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Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Days from origination after which mortgage loans are sold	30 days
Loan upon which a default of principal or interest has existed for a period	90 days
Accrued interest receivable	$ 39,400,000	$ 30,600,000
Accrued Interest and reversed against interest income	$ 429,000	147,000	$ 83,000
Intangible assets, Estimated useful lives	5 years 9 months 18 days
Advertising costs	$ 3,200,000	$ 3,000,000.0	$ 3,000,000.0
Revenue recognition, description of performance obligation	the Company offers various services to customers that generate revenue. Contract performance typically occurs in one year or less.
Incremental cost of obtaining contract	true
Revenue recognition, description of payment terms	Revenue is recognized when the transactions occur or as services are performed over primarily monthly or quarterly periods. Payment is typically received in the period the transactions occur, or in some cases, within 90 days of the service period.
Delinquency period placed on nonaccrual status loan	90 days
Commercial loans are charged off deemed uncollectible period	180 days
Accounting Standards Update 2022-02 [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	false
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true
Accounting Standards Update 2023-02 [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	false
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true
Unfunded other tax credit (LIHTC)	$ 25,100,000
Amortization and other tax credit of NMTC	$ 6,000,000
U.S. Treasury or U.S. Government-sponsored Entities and Agencies [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of available for sale securities held	98.00%	98.00%
Core Deposit Intangibles [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Estimated useful lives	5 years 10 months 24 days
Core Deposit Intangibles [Member] | Minimum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Estimated useful lives	7 years
Core Deposit Intangibles [Member] | Maximum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Estimated useful lives	10 years
Customer Relationship Intangibles [Member] | Minimum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Estimated useful lives	3 years
Customer Relationship Intangibles [Member] | Maximum [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, Estimated useful lives	18 years

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Recent Developments Including Mergers and Acquisitions - Additional Information (Detail)	Jul. 20, 2023 USD ($)	Feb. 08, 2022 USD ($) Location	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Business Combination Separately Recognized Transactions [Line Items]
Total assets			$ 12,372,042,000	$ 12,387,863,000	$ 9,405,612,000
Loans held for investment (net of unearned interest)			7,656,645,000	6,943,563,000
Deposits			10,700,122,000	10,974,228,000
Goodwill			$ 182,263,000	$ 182,055,000	$ 149,922,000
RCB Bank [Member]
Business Combination Separately Recognized Transactions [Line Items]
Total assets	$ 2,500,000
Loans held for investment (net of unearned interest)	2,100,000
Deposits	10,800,000
Proceeds from acquisition	7,800,000
Intangibles assets, net	252,000
Goodwill	$ 209,000
Worthington [Member]
Business Combination Separately Recognized Transactions [Line Items]
Purchase price		$ 77,700,000
Total assets		478,000,000
Loans held for investment (net of unearned interest)		257,000,000
Deposits		430,000,000
Intangibles assets, net		5,900,000
Goodwill		$ 32,100,000
Worthington [Member] | Arlington, Texas [Member]
Business Combination Separately Recognized Transactions [Line Items]
Number of banking locations | Location		1
Worthington [Member] | Colleyville, Texas [Member]
Business Combination Separately Recognized Transactions [Line Items]
Number of banking locations | Location		1
Worthington [Member] | Fort Worth, Texas [Member]
Business Combination Separately Recognized Transactions [Line Items]
Number of banking locations | Location		2

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Cash Due from Banks, Interest-Bearing Deposits and Federal Funds Sold - Summary of Vault Cash and Funds on Deposit with Federal Reserve Bank (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Average Amount Of Required Reserves [Abstract]
Vault cash and funds on deposit with the Federal Reserve Bank	$ 2,255,198	$ 2,942,665

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Securities - Summary of Amortized Cost and Estimated Fair Values of Debt Securities Held for Investment (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 1,190	$ 2,383
Estimated Fair Value	1,190	2,383
Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	5	13
Estimated Fair Value	5	13
States and Political Subdivisions [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	685	1,870
Estimated Fair Value	685	1,870
Other Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	500	500
Estimated Fair Value	$ 500	$ 500

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Securities - Summary of Amortized Cost and Estimated Fair Values of Debt Securities Available for Sale (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,619,420	$ 1,631,891
Gross Unrealized Gains	586	254
Gross Unrealized Losses	(66,101)	(93,924)
Estimated Fair Value	1,553,905	1,538,221
U.S. Treasuries [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,560,265	1,568,563
Gross Unrealized Gains	415
Gross Unrealized Losses	(62,635)	(90,699)
Estimated Fair Value	1,498,045	1,477,864
U.S. Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,631	15,025
Gross Unrealized Gains	142	198
Gross Unrealized Losses	(3)	(1)
Estimated Fair Value	11,770	15,222
Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	16,459	18,449
Gross Unrealized Gains	13	21
Gross Unrealized Losses	(1,677)	(1,884)
Estimated Fair Value	14,795	16,586
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,108	8,320
Gross Unrealized Gains	16	35
Gross Unrealized Losses	(114)	(221)
Estimated Fair Value	10,010	8,134
Asset backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12,794	13,371
Gross Unrealized Losses	(282)	(361)
Estimated Fair Value	12,512	13,010
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,163	8,163
Gross Unrealized Losses	(1,390)	(758)
Estimated Fair Value	$ 6,773	$ 7,405

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Securities - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-Sale [Line Items]
Proceeds from sales of available for sale securities		$ 0	$ 222,474,000	$ 0
Avaliable for sale of debt securities realized gains or losses		$ 0		$ 0
Reinvested in debt securities	$ 220,000,000
Reinvested debt securities, average yield percentage	1.86%
Sale of low yielding securities	$ 226,000,000
Debt securities. average yield percentage	0.16%
Gross losses realized			$ 3,990,000

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Securities - Maturity of Debt Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Held for Investment, Contractual maturity of debt securities, Amortized Cost
Amortized cost, Within one year	$ 350	$ 1,186
Amortized cost, After one year but within five years	840	1,195
Amortized cost, After five years but within ten years		2
Amortized Cost	1,190	2,383
Available for sale, Contractual maturity of debt securities, Amortized Cost
Amortized Cost, Within one year	348,318	101,607
Amortized Cost, After one year but within five years	1,223,529	1,316,874
Amortized Cost, After five years but within ten years	10,331	170,513
Amortized Cost, After ten years	37,242	42,897
Amortized Cost	1,619,420	1,631,891
Held for Investment, Contractual maturity of debt securities, Estimated Fair Value
Estimated Fair Value, Within one year	350	1,186
Estimated Fair Value, After one year but within five years	840	1,195
Estimated Fair Value, After five years but within ten years		2
Estimated Fair Value	1,190	2,383
Available for sale, Contractual maturity of debt securities, Estimated Fair Value
Estimated Fair Value, Within one year	341,645	100,655
Estimated Fair Value, After one year but within five years	1,167,973	1,233,725
Estimated Fair Value, After five years but within ten years	8,851	163,101
Estimated Fair Value, After ten years	35,436	40,740
Total debt securities	$ 1,553,905	$ 1,538,221

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Securities - Company's Book Value of Pledged Debt Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Financial Instruments Owned and Pledged as Collateral [Line Items]
Book value of pledged securities			$ 220,000
Asset Pledged as Collateral without Right [Member]
Financial Instruments Owned and Pledged as Collateral [Line Items]
Book value of pledged securities	$ 591,324	$ 573,952

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Securities - Proceeds from Sales and Realized Losses on Available for Sale Debt Securities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 0	$ 222,474,000	$ 0
Gross losses realized		$ 3,990,000

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Securities - Summary of Debt Securities with Unrealized Losses, Segregated by Duration of Unrealized Loss (Detail) $ in Thousands	Dec. 31, 2023 USD ($) Investments	Dec. 31, 2022 USD ($) Investments
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	155	179
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 6,324	$ 818,115
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	97	29,153
Available-for-sale Securities, 12 Months or Longer, Fair Value	1,436,062	698,341
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	66,004	64,771
Available-for-sale Securities, Fair Value, Total	1,442,386	1,516,456
Available-for-sale Securities, Unrealized Losses, Total	$ 66,101	$ 93,924
U.S. Treasuries [Member]
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	68	74
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 4,838	$ 787,925
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	90	27,078
Available-for-sale Securities, 12 Months or Longer, Fair Value	1,401,669	689,939
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	62,545	63,621
Available-for-sale Securities, Fair Value, Total	1,406,507	1,477,864
Available-for-sale Securities, Unrealized Losses, Total	$ 62,635	$ 90,699
U.S. Federal Agencies [Member]
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	3	1
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 1,100
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	3
Available-for-sale Securities, 12 Months or Longer, Fair Value		$ 349
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses		1
Available-for-sale Securities, Fair Value, Total	1,100	349
Available-for-sale Securities, Unrealized Losses, Total	$ 3	$ 1
Mortgage Backed Securities [Member]
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	74	92
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 80	$ 10,001
Available-for-sale Securities, Less than 12 Months, Unrealized Losses		1,239
Available-for-sale Securities, 12 Months or Longer, Fair Value	13,261	5,055
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	1,677	645
Available-for-sale Securities, Fair Value, Total	13,341	15,056
Available-for-sale Securities, Unrealized Losses, Total	$ 1,677	$ 1,884
States and Political Subdivisions [Member]
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	6	8
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 306	$ 2,308
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	4	184
Available-for-sale Securities, 12 Months or Longer, Fair Value	1,847	464
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	110	37
Available-for-sale Securities, Fair Value, Total	2,153	2,772
Available-for-sale Securities, Unrealized Losses, Total	$ 114	$ 221
Asset backed Securities [Member]
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	1	1
Available-for-sale Securities, Less than 12 Months, Fair Value		$ 13,010
Available-for-sale Securities, Less than 12 Months, Unrealized Losses		361
Available-for-sale Securities, 12 Months or Longer, Fair Value	$ 12,512
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	282
Available-for-sale Securities, Fair Value, Total	12,512	13,010
Available-for-sale Securities, Unrealized Losses, Total	$ 282	$ 361
Other Securities [Member]
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	3	3
Available-for-sale Securities, Less than 12 Months, Fair Value		$ 4,871
Available-for-sale Securities, Less than 12 Months, Unrealized Losses		291
Available-for-sale Securities, 12 Months or Longer, Fair Value	$ 6,773	2,534
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	1,390	467
Available-for-sale Securities, Fair Value, Total	6,773	7,405
Available-for-sale Securities, Unrealized Losses, Total	$ 1,390	$ 758

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Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Loans Held for Investment by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	$ 7,656,645	$ 6,943,563
Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	427,139	408,037
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	7,656,645	6,943,563
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	960,944	908,494
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	1,486,420	1,383,150
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	642,643	475,236
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	283,486	303,305
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	1,258,744	1,117,899
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	244,696	196,198
Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	427,139	408,037
Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	1,289,452	1,241,454
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	476,467	446,756
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	$ 586,654	$ 463,034

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Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Loans Held for Investment by Portfolio Segment (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Receivables [Abstract]
Accrued interest receivable	$ 39.4	$ 30.6

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Loans Held for Investment and Allowance for Credit Losses on Loans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 7,656,645,000	$ 6,943,563,000
Gains (losses) on sale of property held in other real estate owned	728,000	4,200,000	$ 618,000
Write down of property held in other real estate owned	5,200,000	3,700,000	538,000
Balance of modifies loans	5,300,000
Interest income recognized on nonaccrual loans	0	0	0
Nonaccrual loans with no related allowance for credit losses	0	0
Interest income that would have been recognized	1,600,000	1,300,000	2,200,000
Provision for/(benefit from) credit losses	7,458,000	10,076,000	$ (8,690,000)
Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Other real estate	29,400,000	29,400,000
U.S. Federal Agencies [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans guaranteed by government agencies	$ 6,700,000	$ 4,700,000
BancFirst [Member]
Financing Receivable Recorded Investment [Line Items]
Loan percentage	84.00%
Pegasus and Worthington [Member]
Financing Receivable Recorded Investment [Line Items]
Loan percentage	16.00%
Parent Company [Member]
Financing Receivable Recorded Investment [Line Items]
Percentage of loans secured by real estate	69.00%

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Loans Held for Investment and Allowance for Credit Losses on Loans - Schedule of Portfolio Segments Weighted Average Life, and Measures the Allowance for Credit Losses (Detail) - ASC 326 [Member]	12 Months Ended
	Dec. 31, 2023
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	9 years
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	6 years
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	3 years
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	2 years
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	15 years
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	8 years
Real Estate [Member] | Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	9 years
Commercial Non-real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	4 years
Consumer Non-real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	4 years
Oil and Gas [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Loan Segment, Life (in years)	2 years

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Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Other Real Estate Owned and Repossessed Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Summary Of Nonperforming And Restructured Assets [Abstract]
Other real estate owned and repossessed assets	$ 34,200	$ 36,936

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Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Rental Income and Operating Expenses (Details) - Commercial Real Estate [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Rental income	$ 11,224	$ 10,340	$ 9,975
Operating expense	$ 10,868	$ 9,863	$ 8,727

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Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Amounts Included in Nonaccrual Loans Segregated by Portfolio Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	$ 24,573	$ 15,299
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	1,686	1,795
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	874	667
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	800	93
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	638	430
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	3,336	1,947
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	899	55
Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	3,662	2,734
Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	10,101	7,066
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	449	192
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	$ 2,128	$ 320

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Loans Held for Investment and Allowance for Credit Losses on Loans - Age Analysis of Loans Held for Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 7,656,645	$ 6,943,563
Accruing Loans 90 Days or More Past Due	9,542	7,085
Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	427,139	408,037
Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	7,656,645	6,943,563
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	960,944	908,494
Accruing Loans 90 Days or More Past Due	4,377	4,580
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,486,420	1,383,150
Accruing Loans 90 Days or More Past Due	913	43
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	642,643	475,236
Accruing Loans 90 Days or More Past Due		81
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	283,486	303,305
Accruing Loans 90 Days or More Past Due	332
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,258,744	1,117,899
Accruing Loans 90 Days or More Past Due	731	349
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	244,696	196,198
Accruing Loans 90 Days or More Past Due	549	166
Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	427,139	408,037
Accruing Loans 90 Days or More Past Due	579	1,054
Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,289,452	1,241,454
Accruing Loans 90 Days or More Past Due	1,714	345
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	476,467	446,756
Accruing Loans 90 Days or More Past Due	347	467
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	586,654	463,034
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	16,429	21,178
30 to 59 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,386	1,314
30 to 59 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	2,224	6,237
30 to 59 Days Past Due [Member] | Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	198	535
30 to 59 Days Past Due [Member] | Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,542	1,320
30 to 59 Days Past Due [Member] | Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,879	3,415
30 to 59 Days Past Due [Member] | Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	757	265
30 to 59 Days Past Due [Member] | Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,694	2,357
30 to 59 Days Past Due [Member] | Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,501	2,490
30 to 59 Days Past Due [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,248	2,591
30 to 59 Days Past Due [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans		654
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	11,405	5,783
60 to 89 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	26	1,524
60 to 89 Days Past Due [Member] | Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	7,371
60 to 89 Days Past Due [Member] | Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	158	40
60 to 89 Days Past Due [Member] | Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	206	282
60 to 89 Days Past Due [Member] | Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,204	1,076
60 to 89 Days Past Due [Member] | Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	190	37
60 to 89 Days Past Due [Member] | Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	724	34
60 to 89 Days Past Due [Member] | Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	436	2,142
60 to 89 Days Past Due [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,090	648
90 Days and Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	22,992	11,535
90 Days and Greater [Member] | Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	5,598	4,580
90 Days and Greater [Member] | Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,786	42
90 Days and Greater [Member] | Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	800	114
90 Days and Greater [Member] | Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	405	148
90 Days and Greater [Member] | Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,849	844
90 Days and Greater [Member] | Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	613	185
90 Days and Greater [Member] | Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,227	2,265
90 Days and Greater [Member] | Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	10,028	2,772
90 Days and Greater [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	594	585
90 Days and Greater [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	92
Past Due Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	50,826	38,496
Past Due Loans [Member] | Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	7,010	7,418
Past Due Loans [Member] | Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	11,381	6,279
Past Due Loans [Member] | Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,156	689
Past Due Loans [Member] | Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	2,153	1,750
Past Due Loans [Member] | Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	6,932	5,335
Past Due Loans [Member] | Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,560	487
Past Due Loans [Member] | Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,645	4,656
Past Due Loans [Member] | Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	11,965	7,404
Past Due Loans [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	4,932	3,824
Past Due Loans [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	92	654
Current Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	7,605,819	6,905,067
Current Loans [Member] | Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	953,934	901,076
Current Loans [Member] | Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,475,039	1,376,871
Current Loans [Member] | Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	641,487	474,547
Current Loans [Member] | Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	281,333	301,555
Current Loans [Member] | Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,251,812	1,112,564
Current Loans [Member] | Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	243,136	195,711
Current Loans [Member] | Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	423,494	403,381
Current Loans [Member] | Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,277,487	1,234,050
Current Loans [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	471,535	442,932
Current Loans [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	$ 586,562	$ 462,380

XML

Loans Held for Investment and Allowance for Credit Losses on Loans - Gross Loans Held for Investment by Year of Origination and Internally Assigned Credit Grades (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	$ 2,201,950	$ 2,264,479
Fiscal year before current fiscal year	1,564,202	1,428,113
Two years before current fiscal year	1,100,602	752,483
Three years before current fiscal year	560,696	541,762
Four years before current fiscal year	416,738	242,342
Prior	634,924	589,317
Revolving Loans Amortized Cost Basis	1,177,533	1,125,067
Total Loans	7,656,645	6,943,563
Agriculture [Member]
Financing Receivable Recorded Investment [Line Items]
Total Loans	427,139	408,037
Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total Loans	7,656,645	6,943,563
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	165,315	208,645
Fiscal year before current fiscal year	209,978	181,695
Two years before current fiscal year	156,881	133,825
Three years before current fiscal year	109,088	112,335
Four years before current fiscal year	99,444	53,126
Prior	161,330	151,043
Revolving Loans Amortized Cost Basis	58,908	67,825
Total Loans	960,944	908,494
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	125,041	173,596
Fiscal year before current fiscal year	144,429	145,425
Two years before current fiscal year	124,113	106,285
Three years before current fiscal year	85,619	91,892
Four years before current fiscal year	77,400	44,086
Prior	135,064	119,755
Revolving Loans Amortized Cost Basis	23,004	53,026
Total Loans	714,670	734,065
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	39,735	34,774
Fiscal year before current fiscal year	61,879	34,283
Two years before current fiscal year	28,506	27,153
Three years before current fiscal year	22,473	17,999
Four years before current fiscal year	19,617	8,528
Prior	24,199	29,638
Revolving Loans Amortized Cost Basis	33,304	14,737
Total Loans	229,713	167,112
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	140	235
Fiscal year before current fiscal year	3,580	1,718
Two years before current fiscal year	4,262	387
Three years before current fiscal year	644	1,334
Four years before current fiscal year	1,432	332
Prior	1,051	1,161
Revolving Loans Amortized Cost Basis	2,450	62
Total Loans	13,559	5,229
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	399	40
Fiscal year before current fiscal year	90	269
Three years before current fiscal year	352	1,110
Four years before current fiscal year	656	180
Prior	1,016	489
Revolving Loans Amortized Cost Basis	150
Total Loans	2,663	2,088
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 5 [Member]
Financing Receivable Recorded Investment [Line Items]
Four years before current fiscal year	339
Total Loans	339
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	305,555	472,382
Fiscal year before current fiscal year	418,917	289,942
Two years before current fiscal year	253,559	199,370
Three years before current fiscal year	166,830	157,586
Four years before current fiscal year	126,369	49,058
Prior	141,468	137,512
Revolving Loans Amortized Cost Basis	73,722	77,300
Total Loans	1,486,420	1,383,150
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	221,014	349,333
Fiscal year before current fiscal year	271,637	239,369
Two years before current fiscal year	172,291	170,186
Three years before current fiscal year	113,676	107,983
Four years before current fiscal year	56,831	24,075
Prior	68,576	66,546
Revolving Loans Amortized Cost Basis	44,878	45,372
Total Loans	948,903	1,002,864
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	82,206	115,372
Fiscal year before current fiscal year	139,982	50,573
Two years before current fiscal year	79,204	29,031
Three years before current fiscal year	53,154	46,870
Four years before current fiscal year	63,331	24,877
Prior	72,075	69,601
Revolving Loans Amortized Cost Basis	28,844	31,928
Total Loans	518,796	368,252
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	2,135	7,677
Fiscal year before current fiscal year	6,666
Two years before current fiscal year	1,715	153
Three years before current fiscal year		2,733
Four years before current fiscal year	6,207	64
Prior	251	1,318
Total Loans	16,974	11,945
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	200
Fiscal year before current fiscal year	632
Two years before current fiscal year	349
Four years before current fiscal year		42
Prior	566	47
Total Loans	1,747	89
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	221,407	201,922
Fiscal year before current fiscal year	178,831	112,868
Two years before current fiscal year	94,345	41,406
Three years before current fiscal year	12,688	19,853
Four years before current fiscal year	16,798	4,794
Prior	7,184	5,788
Revolving Loans Amortized Cost Basis	111,390	88,605
Total Loans	642,643	475,236
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	124,218	164,865
Fiscal year before current fiscal year	133,254	92,595
Two years before current fiscal year	65,472	39,819
Three years before current fiscal year	5,828	5,558
Four years before current fiscal year	3,392	3,146
Prior	5,019	4,993
Revolving Loans Amortized Cost Basis	76,831	40,474
Total Loans	414,014	351,450
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	95,138	36,090
Fiscal year before current fiscal year	43,884	20,273
Two years before current fiscal year	28,772	1,413
Three years before current fiscal year	6,625	14,248
Four years before current fiscal year	13,406	1,648
Prior	2,146	774
Revolving Loans Amortized Cost Basis	34,559	47,973
Total Loans	224,530	122,419
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	2,051	967
Fiscal year before current fiscal year	893
Two years before current fiscal year	101	141
Three years before current fiscal year	235
Prior	19	8
Revolving Loans Amortized Cost Basis		158
Total Loans	3,299	1,274
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	800
Two years before current fiscal year		33
Three years before current fiscal year		47
Prior		13
Total Loans	800	93
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	221,463	250,505
Fiscal year before current fiscal year	10,509	13,774
Two years before current fiscal year	1,448	361
Three years before current fiscal year	112	18
Four years before current fiscal year	105
Prior	467	442
Revolving Loans Amortized Cost Basis	49,382	38,205
Total Loans	283,486	303,305
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	158,161	209,699
Fiscal year before current fiscal year	7,551	12,612
Two years before current fiscal year	1,421	259
Three years before current fiscal year	100	18
Four years before current fiscal year	105
Prior	467	42
Revolving Loans Amortized Cost Basis	49,284	36,114
Total Loans	217,089	258,744
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	57,172	39,174
Fiscal year before current fiscal year	2,365	1,152
Two years before current fiscal year	27	102
Three years before current fiscal year	12
Prior		400
Revolving Loans Amortized Cost Basis	98	2,091
Total Loans	59,674	42,919
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	5,457	1,212
Fiscal year before current fiscal year	387
Total Loans	5,844	1,212
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	673	420
Fiscal year before current fiscal year	206	10
Total Loans	879	430
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	348,916	352,115
Fiscal year before current fiscal year	268,012	244,044
Two years before current fiscal year	213,325	168,615
Three years before current fiscal year	141,217	101,339
Four years before current fiscal year	86,027	67,959
Prior	195,200	179,585
Revolving Loans Amortized Cost Basis	6,047	4,242
Total Loans	1,258,744	1,117,899
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	294,363	303,369
Fiscal year before current fiscal year	226,557	205,377
Two years before current fiscal year	174,325	141,752
Three years before current fiscal year	115,055	85,850
Four years before current fiscal year	71,941	55,631
Prior	149,836	136,776
Revolving Loans Amortized Cost Basis	6,047	4,242
Total Loans	1,038,124	932,997
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	51,619	46,751
Fiscal year before current fiscal year	39,146	36,453
Two years before current fiscal year	35,226	25,623
Three years before current fiscal year	24,738	13,414
Four years before current fiscal year	12,591	11,687
Prior	39,264	37,167
Total Loans	202,584	171,095
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	2,175	1,940
Fiscal year before current fiscal year	2,187	1,903
Two years before current fiscal year	2,630	1,065
Three years before current fiscal year	773	1,689
Four years before current fiscal year	1,140	497
Prior	4,009	3,826
Total Loans	12,914	10,920
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	759	55
Fiscal year before current fiscal year	122	311
Two years before current fiscal year	1,144	175
Three years before current fiscal year	651	386
Four years before current fiscal year	355	144
Prior	2,091	1,816
Total Loans	5,122	2,887
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	49,193	37,805
Fiscal year before current fiscal year	30,966	13,103
Two years before current fiscal year	9,994	12,539
Three years before current fiscal year	9,814	7,129
Four years before current fiscal year	5,139	5,084
Prior	15,834	14,611
Revolving Loans Amortized Cost Basis	123,756	105,927
Total Loans	244,696	196,198
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	44,475	31,741
Fiscal year before current fiscal year	24,861	11,012
Two years before current fiscal year	8,381	10,696
Three years before current fiscal year	8,122	5,458
Four years before current fiscal year	3,753	3,607
Prior	12,827	11,198
Revolving Loans Amortized Cost Basis	46,479	41,653
Total Loans	148,898	115,365
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	4,244	5,683
Fiscal year before current fiscal year	5,819	1,887
Two years before current fiscal year	1,415	1,744
Three years before current fiscal year	1,652	1,589
Four years before current fiscal year	1,308	1,237
Prior	2,527	2,574
Revolving Loans Amortized Cost Basis	74,388	62,395
Total Loans	91,353	77,109
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	355	381
Fiscal year before current fiscal year	262	186
Two years before current fiscal year	198	71
Three years before current fiscal year	40	50
Four years before current fiscal year	23	201
Prior	391	786
Revolving Loans Amortized Cost Basis	1,942	1,828
Total Loans	3,211	3,503
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	119
Fiscal year before current fiscal year	24	18
Two years before current fiscal year		28
Three years before current fiscal year		32
Four years before current fiscal year	55	39
Prior	89	53
Revolving Loans Amortized Cost Basis	947	51
Total Loans	1,234	221
Real Estate [Member] | Agriculture [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	91,544	109,168
Fiscal year before current fiscal year	73,848	67,507
Two years before current fiscal year	53,929	49,247
Three years before current fiscal year	39,130	32,862
Four years before current fiscal year	26,736	18,553
Prior	51,498	49,846
Revolving Loans Amortized Cost Basis	90,454	80,854
Total Loans	427,139	408,037
Real Estate [Member] | Agriculture [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	52,934	73,722
Fiscal year before current fiscal year	51,099	44,037
Two years before current fiscal year	34,840	35,684
Three years before current fiscal year	26,603	22,094
Four years before current fiscal year	17,863	12,064
Prior	33,052	31,517
Revolving Loans Amortized Cost Basis	46,981	42,542
Total Loans	263,372	261,660
Real Estate [Member] | Agriculture [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	28,829	28,351
Fiscal year before current fiscal year	20,931	22,773
Two years before current fiscal year	18,245	9,638
Three years before current fiscal year	9,826	10,548
Four years before current fiscal year	8,207	6,025
Prior	15,833	15,233
Revolving Loans Amortized Cost Basis	41,018	33,844
Total Loans	142,889	126,412
Real Estate [Member] | Agriculture [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	9,516	6,435
Fiscal year before current fiscal year	1,185	476
Two years before current fiscal year	789	3,427
Three years before current fiscal year	2,570	140
Four years before current fiscal year	296	320
Prior	2,372	2,703
Revolving Loans Amortized Cost Basis	2,454	4,452
Total Loans	19,182	17,953
Real Estate [Member] | Agriculture [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	265	660
Fiscal year before current fiscal year	633	221
Two years before current fiscal year	55	498
Three years before current fiscal year	131	80
Four years before current fiscal year	370	144
Prior	241	393
Revolving Loans Amortized Cost Basis	1	16
Total Loans	1,696	2,012
Commercial Non-real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	351,089	372,602
Fiscal year before current fiscal year	216,257	252,996
Two years before current fiscal year	180,400	85,651
Three years before current fiscal year	46,483	63,919
Four years before current fiscal year	44,266	31,322
Prior	42,213	45,680
Revolving Loans Amortized Cost Basis	408,744	389,284
Total Loans	1,289,452	1,241,454
Commercial Non-real Estate [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	252,112	282,252
Fiscal year before current fiscal year	176,013	205,516
Two years before current fiscal year	159,470	67,229
Three years before current fiscal year	39,097	50,725
Four years before current fiscal year	36,907	13,780
Prior	33,824	40,989
Revolving Loans Amortized Cost Basis	277,740	280,774
Total Loans	975,163	941,265
Commercial Non-real Estate [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	95,590	88,017
Fiscal year before current fiscal year	35,955	46,604
Two years before current fiscal year	19,519	17,420
Three years before current fiscal year	6,591	11,447
Four years before current fiscal year	6,456	15,628
Prior	8,071	3,582
Revolving Loans Amortized Cost Basis	127,800	105,783
Total Loans	299,982	288,481
Commercial Non-real Estate [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	2,206	2,093
Fiscal year before current fiscal year	2,598	461
Two years before current fiscal year	1,011	346
Three years before current fiscal year	109	738
Four years before current fiscal year	121	1,566
Prior	164	180
Revolving Loans Amortized Cost Basis	1,779	2,544
Total Loans	7,988	7,928
Commercial Non-real Estate [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	1,181	240
Fiscal year before current fiscal year	1,691	415
Two years before current fiscal year	400	656
Three years before current fiscal year	686	745
Four years before current fiscal year	309	348
Prior	154	929
Revolving Loans Amortized Cost Basis	1,425	183
Total Loans	5,846	3,516
Commercial Non-real Estate [Member] | Grade 5 [Member]
Financing Receivable Recorded Investment [Line Items]
Three years before current fiscal year		264
Four years before current fiscal year	473
Total Loans	473	264
Consumer Non-real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	231,415	225,305
Fiscal year before current fiscal year	122,160	115,940
Two years before current fiscal year	63,184	44,216
Three years before current fiscal year	21,034	22,999
Four years before current fiscal year	10,012	7,601
Prior	4,377	3,603
Revolving Loans Amortized Cost Basis	24,285	27,092
Total Loans	476,467	446,756
Consumer Non-real Estate [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	211,028	203,238
Fiscal year before current fiscal year	105,365	104,380
Two years before current fiscal year	55,079	39,779
Three years before current fiscal year	18,529	21,035
Four years before current fiscal year	8,939	6,589
Prior	3,301	2,187
Revolving Loans Amortized Cost Basis	22,184	26,263
Total Loans	424,425	403,471
Consumer Non-real Estate [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	19,085	21,011
Fiscal year before current fiscal year	14,919	10,538
Two years before current fiscal year	6,764	3,978
Three years before current fiscal year	2,062	1,541
Four years before current fiscal year	702	822
Prior	910	1,340
Revolving Loans Amortized Cost Basis	2,085	825
Total Loans	46,527	40,055
Consumer Non-real Estate [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	941	827
Fiscal year before current fiscal year	1,424	671
Two years before current fiscal year	932	405
Three years before current fiscal year	326	282
Four years before current fiscal year	299	134
Prior	156	63
Revolving Loans Amortized Cost Basis	11	4
Total Loans	4,089	2,386
Consumer Non-real Estate [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	361	229
Fiscal year before current fiscal year	452	351
Two years before current fiscal year	409	54
Three years before current fiscal year	117	141
Four years before current fiscal year	72	56
Prior	10	13
Revolving Loans Amortized Cost Basis	5
Total Loans	1,426	844
Oil and Gas [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	216,053	34,030
Fiscal year before current fiscal year	34,724	136,244
Two years before current fiscal year	73,537	17,253
Three years before current fiscal year	14,300	23,722
Four years before current fiscal year	1,842	4,845
Prior	15,353	1,207
Revolving Loans Amortized Cost Basis	230,845	245,733
Total Loans	586,654	463,034
Oil and Gas [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	147,902	24,303
Fiscal year before current fiscal year	29,658	125,209
Two years before current fiscal year	72,127	16,482
Three years before current fiscal year	13,898	682
Four years before current fiscal year	1,553	1,678
Prior	15,015	880
Revolving Loans Amortized Cost Basis	180,321	199,995
Total Loans	460,474	369,229
Oil and Gas [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	66,080	7,610
Fiscal year before current fiscal year	4,851	10,668
Two years before current fiscal year	1,019	766
Three years before current fiscal year	402	23,040
Four years before current fiscal year	279	3,167
Prior	177	327
Revolving Loans Amortized Cost Basis	50,201	45,240
Total Loans	123,009	90,818
Oil and Gas [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	1,758	2,117
Fiscal year before current fiscal year	132	47
Two years before current fiscal year	225	5
Revolving Loans Amortized Cost Basis	323	498
Total Loans	2,438	2,667
Oil and Gas [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	313
Fiscal year before current fiscal year	83	320
Two years before current fiscal year	166
Four years before current fiscal year	10
Prior	161
Total Loans	$ 733	$ 320

XML

Loans Held for Investment and Allowance for Credit Losses on Loans - Gross Charges-offs by Year of Orgination (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year gross charge-offs	$ 933
Fiscal year before current fiscal year gross charge-offs	1,436
Two years before current fiscal year gross charge-offs	517
Three years before current fiscal year gross charge-offs	633
Four years before current fiscal year gross charge-offs	277
Prior gross charge-offs	425
Revolving Loans Amortized Cost Basis gross charge-offs	19
Total current-period gross charge-offs	4,240
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year gross charge-offs	174
Fiscal year before current fiscal year gross charge-offs	196
Two years before current fiscal year gross charge-offs	26
Three years before current fiscal year gross charge-offs	203
Four years before current fiscal year gross charge-offs	165
Prior gross charge-offs	158
Total current-period gross charge-offs	922
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior gross charge-offs	3
Total current-period gross charge-offs	3
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Fiscal year before current fiscal year gross charge-offs	3
Three years before current fiscal year gross charge-offs	2
Prior gross charge-offs	1
Total current-period gross charge-offs	6
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Fiscal year before current fiscal year gross charge-offs	94
Total current-period gross charge-offs	94
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Two years before current fiscal year gross charge-offs	91
Three years before current fiscal year gross charge-offs	44
Four years before current fiscal year gross charge-offs	5
Prior gross charge-offs	25
Total current-period gross charge-offs	165
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Fiscal year before current fiscal year gross charge-offs	4
Two years before current fiscal year gross charge-offs	19
Four years before current fiscal year gross charge-offs	1
Prior gross charge-offs	36
Total current-period gross charge-offs	60
Real Estate [Member] | Agriculture Member
Financing Receivable, Credit Quality Indicator [Line Items]
Fiscal year before current fiscal year gross charge-offs	154
Two years before current fiscal year gross charge-offs	9
Three years before current fiscal year gross charge-offs	317
Four years before current fiscal year gross charge-offs	14
Prior gross charge-offs	2
Total current-period gross charge-offs	496
Commercial Non-real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year gross charge-offs	390
Fiscal year before current fiscal year gross charge-offs	351
Two years before current fiscal year gross charge-offs	111
Three years before current fiscal year gross charge-offs	22
Four years before current fiscal year gross charge-offs	51
Prior gross charge-offs	160
Total current-period gross charge-offs	1,085
Consumer Non-real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year gross charge-offs	312
Fiscal year before current fiscal year gross charge-offs	632
Two years before current fiscal year gross charge-offs	261
Three years before current fiscal year gross charge-offs	45
Four years before current fiscal year gross charge-offs	41
Prior gross charge-offs	40
Revolving Loans Amortized Cost Basis gross charge-offs	19
Total current-period gross charge-offs	1,350
Oil and Gas [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year gross charge-offs	57
Fiscal year before current fiscal year gross charge-offs	2
Total current-period gross charge-offs	$ 59

XML

Loans Held for Investment and Allowance for Credit Losses on Loans - Activity in Allowance for Credit Losses on Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	$ 92,728	$ 83,936
Initial allowance on loans purchased with credit deterioration		71
Charge- offs	(4,240)	(2,781)
Recoveries	854	1,426
Net charge-offs	(3,386)	(1,355)
Provision for/(benefit from) credit losses	7,458	10,076	$ (8,690)
Balance at end of period	96,800	92,728	83,936
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	6,416	7,550
Charge- offs	(922)	(20)
Recoveries	68	507
Net charge-offs	(854)	487
Provision for/(benefit from) credit losses	1,921	(1,621)
Balance at end of period	7,483	6,416	7,550
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	30,190	16,807
Charge- offs	(3)
Net charge-offs	(3)
Provision for/(benefit from) credit losses	2,893	13,383
Balance at end of period	33,080	30,190	16,807
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	3,778	3,454
Charge- offs	(6)	(93)
Recoveries	11	12
Net charge-offs	5	(81)
Provision for/(benefit from) credit losses	167	405
Balance at end of period	3,950	3,778	3,454
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	3,275	1,051
Charge- offs	(94)
Net charge-offs	(94)
Provision for/(benefit from) credit losses	233	2,224
Balance at end of period	3,414	3,275	1,051
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	4,092	3,048
Initial allowance on loans purchased with credit deterioration		2
Charge- offs	(165)	(106)
Recoveries	15	87
Net charge-offs	(150)	(19)
Provision for/(benefit from) credit losses	972	1,061
Balance at end of period	4,914	4,092	3,048
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	1,418	1,567
Charge- offs	(60)	(38)
Recoveries	5	405
Net charge-offs	(55)	367
Provision for/(benefit from) credit losses	283	(516)
Balance at end of period	1,646	1,418	1,567
Commercial Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	25,106	25,565
Initial allowance on loans purchased with credit deterioration		44
Charge- offs	(1,085)	(1,551)
Recoveries	446	209
Net charge-offs	(639)	(1,342)
Provision for/(benefit from) credit losses	(1,722)	839
Balance at end of period	22,745	25,106	25,565
Consumer Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	4,132	3,694
Initial allowance on loans purchased with credit deterioration		25
Charge- offs	(1,350)	(768)
Recoveries	182	193
Net charge-offs	(1,168)	(575)
Provision for/(benefit from) credit losses	1,437	988
Balance at end of period	4,401	4,132	3,694
Oil and Gas [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	8,104	12,808
Charge- offs	(59)
Net charge-offs	(59)
Provision for/(benefit from) credit losses	985	(4,704)
Balance at end of period	9,030	8,104	12,808
Agriculture [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	6,217	8,392
Charge- offs	(496)	(205)
Recoveries	127	13
Net charge-offs	(369)	(192)
Provision for/(benefit from) credit losses	289	(1,983)
Balance at end of period	$ 6,137	$ 6,217	$ 8,392

XML

Loans Held for Investment and Allowance for Credit Losses on Loans - Purchased Credit Deteriorated Loans (Detail) - Loans Acquired with Deteriorated Credit Quality [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Financing Receivable Allowance For Credit Losses [Line Items]
Purchase price of loans at acquisition	$ 668
Allowance for credit losses at acquisition	71
Par value of acquired loans at acquisition	$ 739

XML

Loans Held for Investment and Allowance for Credit Losses on Loans - Collateral-dependent Gross Loans Held for Investment by Collateral Type and Related Specific Allocation (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	$ 11,326	$ 18,171
Specific Allocation	96,800	92,728	$ 83,936
Real Estate Asset [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	4,240	7,833
Business Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	6,683	6,625
Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	403	3,713
Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	4,152	6,597
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans		2,213
Specific Allocation	7,483	6,416	7,550
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	632	1,263
Specific Allocation	33,080	30,190	16,807
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	800
Specific Allocation	3,950	3,778	3,454
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	638	420
Specific Allocation	3,414	3,275	1,051
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	189	481
Specific Allocation	4,914	4,092	3,048
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	140	9
Specific Allocation	1,646	1,418	1,567
Real Estate [Member] | Agriculture [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	2,449	7,740
Real Estate [Member] | Real Estate Asset [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans		2,213
Real Estate [Member] | Real Estate Asset [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	632	1,263
Real Estate [Member] | Real Estate Asset [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	800
Real Estate [Member] | Real Estate Asset [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	638	420
Real Estate [Member] | Real Estate Asset [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	189	481
Real Estate [Member] | Real Estate Asset [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	140	9
Real Estate [Member] | Real Estate Asset [Member] | Agriculture [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	1,841	3,447
Real Estate [Member] | Business Assets [Member] | Agriculture [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	593	701
Real Estate [Member] | Other Assets [Member] | Agriculture [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	15	3,592
Real Estate [Member] | Specific Allocation [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation		870
Real Estate [Member] | Specific Allocation [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	250	333
Real Estate [Member] | Specific Allocation [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	225
Real Estate [Member] | Specific Allocation [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	134	45
Real Estate [Member] | Specific Allocation [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	62	207
Real Estate [Member] | Specific Allocation [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	140	9
Real Estate [Member] | Specific Allocation [Member] | Agriculture [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	1,386	3,114
Commercial Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	6,331	5,928
Specific Allocation	22,745	25,106	25,565
Commercial Non-real Estate [Member] | Business Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	6,090	5,924
Commercial Non-real Estate [Member] | Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	241	4
Commercial Non-real Estate [Member] | Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	1,867	1,938
Consumer Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	147	117
Specific Allocation	4,401	4,132	$ 3,694
Consumer Non-real Estate [Member] | Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	147	117
Consumer Non-real Estate [Member] | Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	$ 88	$ 81

XML

Loans Held for Investment and Allowance for Credit Losses on Loans - Transfers from Loans and Premises and Equipment to Other Real Estate Owned, Repossessed Assets and Other Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Noncash Investing and Financing Items [Abstract]
Other real estate owned	$ 3,459	$ 2,563	$ 12,651
Repossessed assets	2,019	1,040	844
Other assets	0	1,943
Total	$ 5,478	$ 5,546	$ 13,495

XML

Loans Held for Investment and Allowance for Credit Losses on Loans - Related Party Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Balance Beginning of the Period	$ 23,167	$ 28,292	$ 22,057
Additions	106,819	46,124	31,574
Collections/ Terminations	(45,722)	(51,249)	(25,339)
Balance End of the Period	$ 84,264	$ 23,167	$ 28,292

XML

Premises and Equipment, Net and Other Assets - Summary of Premises and Equipment by Classification (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property Plant And Equipment [Line Items]
Accumulated depreciation	$ (158,034)	$ (144,381)
Premises and equipment, net	278,594	278,088
Land [Member]
Property Plant And Equipment [Line Items]
Premises and Equipment, gross	49,173	47,856
Buildings [Member]
Property Plant And Equipment [Line Items]
Premises and Equipment, gross	$ 288,391	266,660
Buildings [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated Useful Lives	10 years
Buildings [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated Useful Lives	40 years
Furniture Fixtures and Equipment [Member]
Property Plant And Equipment [Line Items]
Premises and Equipment, gross	$ 94,851	91,340
Furniture Fixtures and Equipment [Member] | Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated Useful Lives	3 years
Furniture Fixtures and Equipment [Member] | Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated Useful Lives	15 years
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Premises and Equipment, gross	$ 4,213	$ 16,613

XML

Premises and Equipment, Net and Other Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Noncash construction in progress for retainage payable	$ 195,000	$ 1,100,000
Cash surrender value of life insurance policies	$ 84,400,000	82,700,000
Percentage of equity investment	50.00%
Low income housing tax credit investments	$ 46,400,000	24,700,000
Tax credits and other tax benefits recognized from LIHTC investments	7,300,000	6,400,000	$ 6,500,000
Equity securities	13,100,000	15,500,000
Other assets in equity interest	0	21,400,000
Amortization expense resulting from LIHTC investments	5,600,000	5,100,000	5,500,000
Unfunded commitment on investments	$ 26,800,000
Percentage of qualified investment	39.00%
Period of qualified investments taken	7 years
New market tax credit investments	$ 12,100,000	11,300,000
Tax credits and other tax benefits recognized from NMTC investments	5,600,000	4,700,000	4,000,000
Amortization expense resulting from NMTC investments	4,600,000	$ 3,900,000	$ 3,300,000
Unfunded commitment on NMTC investments	$ 0

XML

Intangible Assets and Goodwill - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 36,900	$ 36,648
Accumulated Amortization	(20,196)	(16,665)
Net Carrying Amount	16,704	19,983
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,550	33,298
Accumulated Amortization	(17,027)	(13,615)
Net Carrying Amount	16,523	19,683
Customer Relationship Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,350	3,350
Accumulated Amortization	(3,169)	(3,050)
Net Carrying Amount	$ 181	$ 300

XML

Intangible Assets and Goodwill - Additional Information (Detail)	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Weighted-average life	5 years 9 months 18 days
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-average life	1 year 7 months 6 days
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-average life	5 years 10 months 24 days

XML

Intangible Assets and Goodwill - Estimated Amortization of Intangible Assets (Detail) $ in Thousands	Dec. 31, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2024	$ 3,474
2025	3,249
2026	2,645
2027	2,641
2028	$ 1,821

XML

Intangible Assets and Goodwill - Summary of Goodwill by Business Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Balance at beginning of period	$ 182,055	$ 149,922
Acquisitions	208	32,133
Balance at end of period	182,263	182,055
BancFirst Metropolitan Banks [Member]
Goodwill [Line Items]
Balance at beginning of period	13,767	13,767
Balance at end of period	13,767	13,767
BancFirst Community Banks [Member]
Goodwill [Line Items]
Balance at beginning of period	61,212	61,212
Acquisitions	208
Balance at end of period	61,420	61,212
Pegasus [Member]
Goodwill [Line Items]
Balance at beginning of period	68,855	68,855
Balance at end of period	68,855	68,855
Worthington [Member]
Goodwill [Line Items]
Balance at beginning of period	32,133	0
Acquisitions		32,133
Balance at end of period	32,133	32,133
Other Financial Services [Member]
Goodwill [Line Items]
Balance at beginning of period	5,464	5,464
Balance at end of period	5,464	5,464
Executive, Operations & Support [Member]
Goodwill [Line Items]
Balance at beginning of period	624	624
Balance at end of period	$ 624	$ 624

XML

Deposits - Summary of Year-end deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deposits [Abstract]
Noninterest-bearing demand deposits	$ 3,982,226	$ 4,944,730
Money market and interest-bearing checking deposits	4,699,865	4,173,268
Savings deposits	1,056,404	1,143,176
Time deposits	961,627	713,054
Total deposits	$ 10,700,122	$ 10,974,228

XML

Deposits - Summary of Scheduled Maturities of all Time Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deposits [Abstract]
2024	$ 774,008
2025	120,976
2026	27,347
2027	17,093
2028	22,199
Thereafter	4
Total	$ 961,627	$ 713,054

XML

Deposits - Summary of time Deposits Meet or Exceed Current Federal Deposit Insurance Corporation Insurance Limit for Periods Presented (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deposits [Abstract]
Time deposits of $250,000 or more	$ 299,018	$ 224,517

XML

Deposits - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deposits [Abstract]
Overdrawn customer transaction deposits reclassified as loan balances	$ 6.2	$ 4.4

XML

Short-Term Borrowings - Summary of Short-Term Borrowings (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Short-term Debt [Line Items]
Total short-term borrowings	$ 3,351	$ 300
Weighted average interest rate	4.84%	1.39%
Federal Funds Purchased [Member]
Short-term Debt [Line Items]
Total short-term borrowings	$ 2,525	$ 300
Repurchase Agreements [Member]
Short-term Debt [Line Items]
Total short-term borrowings	$ 826
Short-term Debt [Member]
Short-term Debt [Line Items]
End of period interest rate	4.06%	4.30%

XML

Line of Credit - Additional Information (Detail)	Dec. 31, 2023 USD ($)
Debt Instrument [Line Items]
Maximum drawing capacity	$ 793,300,000
FHLB stock holdings	658,300
Advances outstanding	0
Federal reserve discount window capacity	26,300,000
Brokered certificate of deposit capacity	72,100,000
BancFirst [Member]
Debt Instrument [Line Items]
Advances outstanding	0
Worthington [Member]
Debt Instrument [Line Items]
Advances outstanding	0
Residential Mortgage [Member]
Debt Instrument [Line Items]
Line of credit assets pledged as collateral	1,100,000,000
Federal Home Loan Bank [Member]
Debt Instrument [Line Items]
Maximum drawing capacity	75,200,000
Revolving Line of Credit Member] | BancFirst [Member]
Debt Instrument [Line Items]
Maximum drawing capacity	25,000,000
Revolving Line of Credit Member] | Worthington [Member]
Debt Instrument [Line Items]
Maximum drawing capacity	$ 10,500,000

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Subordinated Debt - Additional Information (Detail) - USD ($)		1 Months Ended		12 Months Ended
	Jun. 17, 2021	Mar. 31, 2004	Feb. 29, 2004	Dec. 31, 2023
Subordinated Notes due 2036 [Member] | Private Placement [Member]
Subordinated Borrowing [Line Items]
Interest rate of securities	3.50%
Debt instrument maturity date				Jun. 30, 2036
Aggregate principal amount	$ 60,000,000
Net proceeds from sale of notes	59,150,000
Commissions and offering expenses	$ 850,000
Debt instrument, redemption, description				the Company may redeem all, but not less than all, of the Subordinated Notes at any time upon the occurrence of a “Tier 2 Capital Event,” a “Tax Event” or an “Investment Company Event” (each as defined in the Subordinated Notes). Any such redemption is subject to obtaining the prior approval of the Board of Governors of the Federal Reserve System (or its designee). The redemption price with respect to any such redemption will be equal to 100% of the principal amount of the Subordinated Note, or portion thereof, to be redeemed, plus accrued but unpaid interest, if any, thereon to, but excluding, the redemption date.
Debt instrument, redemption price, percentage of principal amount to be redeemed				100.00%
Subordinated Notes due 2036 [Member] | Private Placement [Member] | Bear Interest at Fixed Rate of 3.50% [Member]
Subordinated Borrowing [Line Items]
Frequency of payment				payable semi-annually in arrears on June 30 and December 31 of each year
Debt instrument, payment terms				The Subordinated Notes will initially bear interest at a fixed rate of 3.50% per annum, from and including June 17, 2021 to but excluding June 30, 2031, payable semi-annually in arrears on June 30 and December 31 of each year, commencing December 31, 2021. Then, from and including June 30, 2031, to but excluding the maturity date, the Subordinated Notes will bear interest at a floating rate equal to the benchmark (initially, three-month term SOFR), reset quarterly, plus a spread of 229 basis points, payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year. The Subordinated Notes mature on June 30, 2036.
Fixed rate				3.50%
Debt instrument, commencing date				Dec. 31, 2021
Subordinated Notes due 2036 [Member] | Private Placement [Member] | Three-Month Term SOFR [Member]
Subordinated Borrowing [Line Items]
Frequency of payment				payable quarterly in arrears on March 31, June 30, September 30 and December 31 of each year
Debt instrument, Basis point rate				2.29%
BancFirst Capital Trust Two [Member] | Subordinated Debentures Subject to Mandatory Redemption [Member]
Subordinated Borrowing [Line Items]
Interest rate of securities				7.20%
Junior subordinated notes assumed				$ 26,800,000
Frequency of payment				payable January 15, April 15, July 15 and October 15 of each year.
Debt instrument maturity date				Mar. 31, 2034
BancFirst Capital Trust Two [Member] | Cumulative Preferred Stock [Member]
Subordinated Borrowing [Line Items]
Issue of securities		$ 1,000,000	$ 25,000,000
Cumulative trust preferred securities interest rate				7.20%

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Income Taxes - Components of the Company's Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current taxes:
Federal	$ 53,247	$ 39,197	$ 28,359
State	7,023	4,813	5,365
Deferred taxes	(2,787)	322	7,044
Total income taxes	$ 57,483	$ 44,332	$ 40,768

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Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Line Items]
Securities transactions income tax (benefit) expense	$ (384,000)	$ 453,000	$ 220,000
Federal tax rate, percentage	21.00%	21.00%	21.00%
Recognition of interest and penalties related to unrecognized tax benefits	$ 0	$ 0	$ 0
Earliest Tax Year [Member]
Income Taxes [Line Items]
Year under examination	2020
Latest Tax Year [Member]
Income Taxes [Line Items]
Year under examination	2022

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Income Taxes - Reconciliation of Tax Expense at the Federal Statutory Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Tax expense at the federal statutory tax rate	$ 56,689	$ 49,861	$ 43,764
Increase (decrease) in tax expense from:
Tax-exempt income, net	(343)	(337)	(436)
Modified endowment life contracts	(497)	(487)	(501)
Share based compensation excess tax benefit	(786)	(2,905)	(1,643)
Tax deductible dividends paid on ESOP	(505)	(481)	(490)
State tax expense, net of federal tax benefit	4,945	3,788	4,779
Bargain purchase gain			(1,007)
Utilization of tax credits:
New markets tax credits, net of amortization	(777)	(3,745)	(3,192)
Low-income housing tax credits, net of amortization	(1,106)	(1,024)	(1,533)
Other tax credits, net of amortization	(192)	(91)	(379)
Other, net	55	(247)	1,406
Total income taxes	$ 57,483	$ 44,332	$ 40,768

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Income Taxes - Summary of Net Deferred Tax Asset Reported in Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Unrealized net losses on securities	$ 15,473	$ 22,107
Provision for credit losses	22,782	20,988
Write-downs of other real estate owned	2,522	938
Deferred compensation	2,116	2,142
Stock-based compensation	2,199	1,643
Investments in partnership interests	7,260	6,056
Other	911	1,123
Gross deferred tax assets	53,263	54,997
Intangibles	(5,639)	(6,346)
Basis difference related to tax credits	(5,462)	(4,118)
Depreciation	(21,833)	(20,360)
Prepaid expense deducted	(1,243)	(1,139)
Other	(181)	(283)
Gross deferred tax liabilities	(34,358)	(32,246)
Net deferred tax asset	$ 18,905	$ 22,751

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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands			12 Months Ended
	Jun. 01, 2023	May 25, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Cash settlement for stock options, number of shares					121,330
Net cash settlement for stock options, cost			$ 0	$ 0	$ 5,500
Deferred board fees percentage for stock units accumulation			100.00%
Stock option granted			0
RSU's Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares for future grants		467,925
Option exercisable rate		20.00%
Option exercisable period		2 years
Options expire period		10 years
Options vest and exercisable Description			The restricted stock units ("RSU's") vest beginning two years from the date of grant at the rate of 20% per year for five years.
Vesting period in years		5 years
Non-Employee Directors Stock Option Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option plan termination date	Jun. 01, 2023
Option exercisable rate			25.00%
Option exercisable period			1 year
Options expire period			15 years
Options vest and exercisable Description			The remaining options will continue to vest and are exercisable beginning one year from the date of grant at the rate of 25% per year for four years
Vesting period in years			4 years
Banc First Deferred Stock Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option plan termination date			Dec. 31, 2024
Number of shares available for future issuance under deferred compensation plan			18,186
Number of shares of common stock distributed			18,136	30,982
Employee Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option plan termination date	Jun. 01, 2023
Option exercisable rate			25.00%
Options expire period			15 years
Vesting period in years, start			4 years
Options vest and exercisable Description			and are exercisable beginning four years from the date of grant at the rate of 25% per year for four years, and expire no later than the end of fifteen years from the date of grant
Vesting period in years			4 years
Employee Plan [Member] | Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period in years			5 years
Employee Plan [Member] | RSU's Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period in years			6 years

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Stock-Based Compensation - Summary of Activity Under RSU Plan (Details)	12 Months Ended
	Dec. 31, 2023 $ / shares shares
Share-Based Payment Arrangement [Abstract]
Restricted Stock Units, Granted	32,075
Restricted Stock Units, Nonvested Ending Balance	32,075
Weightage Average Grant Date Fair Value, Granted | $ / shares	$ 87.23

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Stock-Based Compensation - Summary of Accumulated Stock Units (Detail) - $ / shares	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Accumulated stock units	119,575	129,609
Average price	$ 40.03	$ 34.91

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Stock-Based Compensation - Summary of Activity Under Stock Option Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Outstanding at beginning period - Options	1,310,290	1,303,250
Options granted		278,500
Options exercised	(60,024)	(241,460)
Options canceled, forfeited, or expired	(8,875)	(30,000)
Outstanding at ending period - Options	1,241,391	1,310,290
Exercisable at ending period - Options	524,016	489,540
Outstanding at beginning period - Wgtd. Avg. Exercise Price	$ 52.51	$ 40.90
Options granted - Wgtd. Avg. Exercise Price		87.13
Options exercised - Wgtd. Avg. Exercise Price	34.83	28.06
Options cancelled, forfeited, or expired - Wgtd. Avg. Exercise Price	86.42	66.31
Outstanding at ending period - Wgtd. Avg. Exercise Price	53.12	52.51
Exercisable at ending period - Wgtd. Avg. Exercise Price	$ 34.53	$ 30.82
Outstanding at ending period - Wgtd. Avg. Remaining Contractual Term, years	9 years 8 months 12 days	8 years 8 months 23 days
Exercisable at ending period - Wgtd. Avg. Remaining Contractual Term, years	6 years 4 months 20 days	6 years 9 months 18 days
Outstanding at ending period - Aggregate Intrinsic Value	$ 54,882	$ 46,741
Exercisable at ending period - Aggregate Intrinsic Value	$ 32,908	$ 28,082

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Stock-Based Compensation - Options Exercised Under Stock Option Plan (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract]
Total intrinsic value of options exercised	$ 3,055	$ 14,837	$ 9,264
Cash received from options exercised	2,090	6,776	5,015
Tax benefit realized from options exercised	$ 734	$ 3,567	$ 2,360

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Stock-Based Compensation - Assumptions Used for Computing Stock-Based Compensation Expense (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Weighted average grant-date fair value per share of options granted	$ 31.9	$ 21.16
Risk-free interest rate, minimum	1.75%	1.30%
Risk-free interest rate, maximum	4.17%	1.74%
Dividend yield	2.00%	2.00%
Stock price volatility, minimum	34.61%	35.55%
Stock price volatility, maximum	35.60%	36.39%
Expected term	10 years	10 years

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Stock-Based Compensation - Stock-Based Employee Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement Compensation Expense Items [Abstract]
Stock-based compensation expense	$ 2,999	$ 1,941	$ 2,133
Tax benefit	721	467	513
Stock-based compensation expense, net of tax	$ 2,278	$ 1,474	$ 1,620

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Stock-Based Compensation - Unearned Stock-based Compensation Expense (Detail) $ in Thousands	Dec. 31, 2023 USD ($)
Employee Stock Option
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Unearned stock-based compensation expense	$ 10,316
RSU's Plan [Member]
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Unearned stock-based compensation expense	$ 2,672

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Retirement Plans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 Plans
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Number of retirement plans	2
Maximum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Maximum legal limit of employer contribution to plan	3.00%

XML

Retirement Plans - Aggregate Amounts of Contributions to the 401(k) and ESOP Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Contribution Plan Disclosure [Line Items]
Total contributions	$ 9,157	$ 7,818	$ 7,173
401(k) contributions [Member]
Defined Contribution Plan Disclosure [Line Items]
Aggregate amounts of contributions	3,410	3,011	2,856
ESOP contributions [Member]
Defined Contribution Plan Disclosure [Line Items]
Aggregate amounts of contributions	$ 5,747	$ 4,807	$ 4,317

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Stockholders' Equity - Summary of Authorized Outstanding Preferred and Common Stock (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares outstanding	32,933,018	32,875,560	32,603,118
Common stock, par value	$ 1.00	$ 1.00
Common stock dividend payment terms	As declared
Common stock, voting rights	Voting
Senior Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares outstanding		0
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, dividend payment terms	As declared
Preferred stock, voting rights	Voting
Cumulative Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized	900,000	900,000
Preferred stock, shares outstanding	0
Preferred stock, par value	$ 5.00	$ 5.00
Preferred stock, dividend payment terms	As declared
Preferred stock, voting rights	Non-voting

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Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Jan. 31, 2024	Dec. 31, 2022	Jun. 17, 2021
Stockholders Equity [Line Items]
Increase to retained earnings for cumulative effect of adopting ASU	$ 1,276,305		$ 1,120,292
Subordinated Notes due 2036 [Member] | Private Placement [Member]
Stockholders Equity [Line Items]
Aggregate principal amount				$ 60,000
Maximum [Member]
Stockholders Equity [Line Items]
Quantitative limit for trust preferred securities to be included in tier 1 capital	$ 15,000,000
Subsequent Event [Member]
Stockholders Equity [Line Items]
Available equity of BancFirst for dividend payments to the company		$ 145,700
Senior Preferred Stock [Member]
Stockholders Equity [Line Items]
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding			0
Cumulative Preferred Stock [Member]
Stockholders Equity [Line Items]
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0
Dividend payable at redemption, per share	$ 5.00
Cumulative preferred stock dividend rate	10.00%

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Stockholders' Equity - Summary of Shares Repurchased Under Stock Purchase Program (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2021	Dec. 31, 2022
Summary Of Shares Repurchased Under Stock Purchase Program [Abstract]
Number of shares repurchased	20,702	212,296
Average price of shares repurchased	$ 87.88	$ 54.94
Shares remaining to be repurchased	479,784	500,486	500,486

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Stockholders' Equity - Required Capital Amounts and Company's Respective Ratios (Detail) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 1,467,062	$ 1,298,329
Total Capital To Risk Weighted Assets Actual Ratio	0.169	0.1661
Capital Required For Capital Adequacy Amount	$ 694,520	$ 625,387
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.08	0.08
Capital With Capital Conservation Buffer Amount	$ 911,558	$ 820,821
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.105	0.105
Common Equity Tier 1 Risk Based Capital Amount	$ 1,284,966	$ 1,120,361
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.148	0.1433
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 390,668	$ 351,780
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.045	0.045
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 607,705	$ 547,214
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.07	0.07
Tier 1 Risk Based Capital Amount	$ 1,310,966	$ 1,146,361
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.151	0.1466
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 520,890	$ 469,041
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.06	0.06
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 737,928	$ 664,474
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.085	0.085
Tier 1 Capital Amount	$ 1,310,966	$ 1,146,361
Tier 1 Capital To Average Assets Ratio	0.1076	0.093
Tier 1 Capital Required For Capital Adequacy Amount	$ 487,279	$ 493,191
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	0.04	0.04
BancFirst [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 1,166,750	$ 1,092,098
Total Capital To Risk Weighted Assets Actual Ratio	0.1568	0.1668
Capital Required For Capital Adequacy Amount	$ 595,191	$ 523,932
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.08	0.08
Capital With Capital Conservation Buffer Amount	$ 781,189	$ 687,661
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.105	0.105
Capital Required To Be Well Capitalized Amount	$ 743,989	$ 654,916
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.10	0.10
Common Equity Tier 1 Risk Based Capital Amount	$ 1,061,943	$ 991,050
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1427	0.1513
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 334,795	$ 294,712
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.045	0.045
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 520,792	$ 458,441
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.07	0.07
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 483,593	$ 425,695
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.065	0.065
Tier 1 Risk Based Capital Amount	$ 1,081,943	$ 1,011,050
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1454	0.1544
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 446,393	$ 392,949
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.06	0.06
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 632,391	$ 556,678
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.085	0.085
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 595,191	$ 523,932
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.08	0.08
Tier 1 Capital Amount	$ 1,081,943	$ 1,011,050
Tier 1 Capital To Average Assets Ratio	0.1043	0.0972
Tier 1 Capital Required For Capital Adequacy Amount	$ 414,882	$ 416,004
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	0.04	0.04
Tier 1 Capital Required To Be Well Capitalized Amount	$ 518,603	$ 520,005
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio	0.05	0.05
Pegasus [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 139,472	$ 117,445
Total Capital To Risk Weighted Assets Actual Ratio	0.1698	0.1291
Capital Required For Capital Adequacy Amount	$ 65,706	$ 77,802
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.08	0.08
Capital With Capital Conservation Buffer Amount	$ 86,239	$ 95,553
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.105	0.105
Capital Required To Be Well Capitalized Amount	$ 82,132	$ 91,003
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.10	0.10
Common Equity Tier 1 Risk Based Capital Amount	$ 130,792	$ 108,437
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1592	0.1192
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 36,959	$ 40,951
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.045	0.045
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 57,492	$ 63,702
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.07	0.07
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 53,386	$ 59,152
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.065	0.065
Tier 1 Risk Based Capital Amount	$ 130,792	$ 108,437
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1592	0.1192
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 49,279	$ 54,602
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.06	0.06
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 69,812	$ 77,352
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.085	0.085
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 65,706	$ 72,802
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.08	0.08
Tier 1 Capital Amount	$ 130,792	$ 108,437
Tier 1 Capital To Average Assets Ratio	0.1056	0.08
Tier 1 Capital Required For Capital Adequacy Amount	$ 49,529	$ 54,238
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	0.04	0.04
Tier 1 Capital Required To Be Well Capitalized Amount	$ 61,911	$ 67,798
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio	0.05	0.05
Worthington [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 51,608	$ 47,554
Total Capital To Risk Weighted Assets Actual Ratio	0.123	0.1409
Capital Required For Capital Adequacy Amount	$ 33,571	$ 27,006
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.08	0.08
Capital With Capital Conservation Buffer Amount	$ 44,061	$ 35,446
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.105	0.105
Capital Required To Be Well Capitalized Amount	$ 41,963	$ 33,758
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.10	0.10
Common Equity Tier 1 Risk Based Capital Amount	$ 47,690	$ 44,207
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1136	0.131
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 18,883	$ 15,191
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.045	0.045
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 29,374	$ 23,631
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.07	0.07
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 27,276	$ 21,943
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.065	0.065
Tier 1 Risk Based Capital Amount	$ 47,690	$ 44,207
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1136	0.131
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 25,178	$ 20,255
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.06	0.06
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 35,669	$ 28,694
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.085	0.085
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 33,571	$ 27,006
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.08	0.08
Tier 1 Capital Amount	$ 47,690	$ 44,207
Tier 1 Capital To Average Assets Ratio	0.0862	0.0853
Tier 1 Capital Required For Capital Adequacy Amount	$ 22,140	$ 20,738
Tier 1 Capital Required For Capital Adequacy To Average Assets Ratio	0.04	0.04
Tier 1 Capital Required To Be Well Capitalized Amount	$ 27,675	$ 25,922
Tier 1 Capital Required To Be Well Capitalized To Average Assets Ratio	0.05	0.05

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Net Income Per Common Share - Basic and Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
(Numerator)
Income available to common stockholders	$ 212,465	$ 193,100	$ 167,630
(Denominator)
Weighted average shares outstanding for basic earnings per common share	32,919,348	32,778,355	32,716,099
Dilutive effect of stock compensation	575,139	661,141	598,047
Weighted-average shares outstanding for diluted earnings per common share	33,494,487	33,439,496	33,314,146
Basic earnings per share	$ 6.45	$ 5.89	$ 5.12
Diluted earnings per share	$ 6.34	$ 5.77	$ 5.03

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Net Income Per Common Share - Average Exercise Price of Options And RSUs Excluded from Computation of Diluted Net Income Per Common Share (Detail) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Abstract]
Shares	280,150	155,316	189,780

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Condensed Parent Company Financial Statements - Summary of Balance Sheet of Parent Company (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Cash	$ 225,462	$ 259,049
Goodwill	182,263	182,055	$ 149,922
Total assets	12,372,042	12,387,863	9,405,612
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities	148,577	76,455
Subordinated debt	86,101	86,044
Stockholders’ equity	1,433,891	1,250,836	$ 1,171,734
Total liabilities and stockholders' equity	12,372,042	12,387,863
Parent Company [Member]
ASSETS
Cash	91,454	17,806
Investments in subsidiaries	1,315,124	1,206,246
Goodwill	101,611	101,611
Core deposit premium	10,428	12,009
Dividends receivable	17,091	15,682
Other assets	2,262	1,731
Total assets	1,537,970	1,355,085
LIABILITIES AND STOCKHOLDERS' EQUITY
Other liabilities	17,978	18,205
Subordinated debt	86,101	86,044
Stockholders’ equity	1,433,891	1,250,836
Total liabilities and stockholders' equity	$ 1,537,970	$ 1,355,085

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Condensed Parent Company Financial Statements- Summary of Income Statement of Parent Company (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
OPERATING INCOME
Interest on interest-bearing deposits	$ 119,260	$ 58,848	$ 4,366
OPERATING EXPENSE
Other	50,009	53,258	54,051
Allocated income tax benefit	(57,483)	(44,332)	(40,768)
Amortization of stock-based compensation arrangements of subsidiaries	(2,999)	(1,941)	(2,133)
Net income	212,465	193,100	167,630
Parent Company [Member]
OPERATING INCOME
Dividends from subsidiaries	137,275	93,139	54,480
Interest on interest-bearing deposits	1,178	94	41
Other	726	1,338	1,071
Total operating income	139,179	94,571	55,592
OPERATING EXPENSE
Interest	4,122	4,122	3,130
Other	3,206	7,190	3,340
Total operating expense	7,328	11,312	6,470
Income before taxes	131,851	83,259	49,122
Allocated income tax benefit	2,249	5,857	4,191
Income before equity in undistributed earnings of subsidiaries	134,100	89,116	53,313
Equity in undistributed earnings of subsidiaries	81,275	105,817	116,365
Amortization of stock-based compensation arrangements of subsidiaries	(2,910)	(1,833)	(2,048)
Net income	$ 212,465	$ 193,100	$ 167,630

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Condensed Parent Company Financial Statements - Summary of Cash Flow of Parent Company (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 212,465	$ 193,100	$ 167,630
Adjustments to reconcile to net cash provided by operating activities:
Amortization of stock-based compensation arrangements of subsidiaries	2,999	1,941	2,133
Other, net	(7,194)	(2,482)	6,783
Net cash provided by operating activities	233,045	226,272	203,934
INVESTING ACTIVITIES
Other, net	33,477	14,494	9,305
Net cash (used in) provided by investing activities	(669,705)	(1,519,168)	422,885
FINANCING ACTIVITIES
Common stock acquired	(1,820)		(11,663)
Net cash settlement of options			(5,479)
Cash dividends paid	(53,642)	(48,462)	(45,140)
Proceeds from issuance of subordinated notes, net of debt issuance costs			59,150
Net cash (used in) provided by financing activities	(334,787)	2,411,784	(193,709)
Net (decrease)/increase in cash, due from banks and interest-bearing deposits	(771,447)	1,118,888	433,110
Cash, due from banks and interest-bearing deposits at the beginning of the period	3,168,910	2,050,022	1,616,912
Cash, due from banks and interest-bearing deposits at the end of the period	2,397,463	3,168,910	2,050,022
SUPPLEMENTAL DISCLOSURE
Cash paid during the period for interest	191,760	42,930	11,993
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	212,465	193,100	167,630
Adjustments to reconcile to net cash provided by operating activities:
Equity in undistributed earnings of subsidiaries	(81,275)	(105,817)	(116,365)
Amortization of stock-based compensation arrangements of subsidiaries	2,910	1,833	2,048
Other, net	(655)	3,815	5,056
Net cash provided by operating activities	133,445	92,931	58,369
INVESTING ACTIVITIES
Payments for investments in subsidiaries	(6,100)	(94,967)	(9,000)
Other, net	(778)	(1,352)	4,429
Net cash (used in) provided by investing activities	(6,878)	(96,319)	(4,571)
FINANCING ACTIVITIES
Issuance of common stock	2,543	7,649	2,260
Common stock acquired	(1,820)		(11,663)
Net cash settlement of options			(5,479)
Cash dividends paid	(53,642)	(48,462)	(45,140)
Proceeds from issuance of subordinated notes, net of debt issuance costs			59,150
Net cash (used in) provided by financing activities	(52,919)	(40,813)	(872)
Net (decrease)/increase in cash, due from banks and interest-bearing deposits	73,648	(44,201)	52,926
Cash, due from banks and interest-bearing deposits at the beginning of the period	17,806	62,007	9,081
Cash, due from banks and interest-bearing deposits at the end of the period	91,454	17,806	62,007
SUPPLEMENTAL DISCLOSURE
Cash paid during the period for interest	4,122	4,122	3,130
Cash received during the period for income taxes, net	$ 1,746	$ 6,667	$ 4,411

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Commitments and Contingent Liabilities - Summary of Financial Instruments with Off-Balance-Sheet Risks (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Loan commitments	$ 2,785,673	$ 2,627,552
Stand-by letters of credit	$ 84,947	$ 72,237

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Leases - Schedule of Rent Expense of Operating Leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Rent expense on all property and equipment rented	$ 2,066	$ 1,865	$ 1,560

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Leases - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Right of use lease asset	$ 5,900	$ 5,600
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Accrued interest receivable and other assets	Accrued interest receivable and other assets
Operating lease liability	$ 5,837	$ 5,400
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Accrued interest payable and other liabilities	Accrued interest payable and other liabilities
Operating lease weighted-average remaining lease term	3 years 2 months 12 days
Operating lease weighted-average discount rate	2.60%
Operating lease revenue	$ 5,900	$ 5,400	$ 4,900
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Occupancy, Net	Occupancy, Net	Occupancy, Net

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Leases - Schedule of Minimum Future Commitments of Operating Leases (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
2024	$ 2,022
2025	1,653
2026	1,085
2027	731
2028	409
Thereafter	312
Total lease payments	6,212
Less imputed interest	(375)
Operating lease liability	$ 5,837	$ 5,400

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Leases - Scheduled of Minimum Future Contractual Rent To be Received Under The Remaining Non-Cancelable Term of Operating Leases (Detail) $ in Thousands	Dec. 31, 2023 USD ($)
Leases [Abstract]
2024	$ 3,555
2025	2,796
2026	2,535
2027	2,181
2028	1,951
2029-2031	4,269
Total future minimum lease payments	$ 17,287

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Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 1,553,905	$ 1,538,221
Derivative assets	$ 41,099	$ 20,745
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Interest Receivable and Other Assets	Interest Receivable and Other Assets
Derivative liabilities	$ 39,176	$ 19,683
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
U.S. Treasury [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 1,498,045	$ 1,477,864
U.S. Federal Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	11,770	15,222
Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	14,795	16,586
States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	10,010	8,134
Asset backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	12,512	13,010
Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	6,773	7,405
Level 1 Inputs [Member] | U.S. Treasury [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	1,498,045	1,477,864
Level 2 Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	41,099	20,745
Derivative liabilities	39,176	19,683
Level 2 Inputs [Member] | U.S. Federal Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	11,770	15,222
Level 2 Inputs [Member] | Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	14,795	16,586
Level 2 Inputs [Member] | States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	9,830	7,680
Level 2 Inputs [Member] | Asset backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	12,512	13,010
Level 2 Inputs [Member] | Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	6,773	7,405
Level 3 Inputs [Member] | States and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 180	$ 454

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Fair Value Measurements - Changes in Level 3 Assets Measured at Estimated Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at the beginning of the year	$ 454	$ 320
Transfers (to)/from level 2	(244)
Purchases		255
Settlements	(30)	(110)
Total unrealized losses		$ (11)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]		OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
Balance at the end of the period	$ 180	$ 454

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Fair Value Measurements - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Days from origination after which mortgage loans are sold	30 days
Amount of non-financial assets (liabilities) measured at fair value on a recurring basis	$ 0	$ 0
Non-financial assets or liabilities for which no impairment was provided	$ 0	$ 0

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Fair Value Measurements - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Level 3 [Member] - Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Equity Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	$ 13,144	$ 15,512
Collateral Dependent Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	1,894	1,618
Repossessed Assets [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	474	180
Other Real Estate Owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	$ 31,773	$ 34,999

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Fair Value Measurements - Estimated Fair Values of Company's Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
FINANCIAL ASSETS
Federal funds sold, Carrying Amount	$ 1,316	$ 2,850
Debt securities held for investment, Carrying Amount	1,190	2,383
Loans held for investment, net of allowance for credit losses Carrying Amount	7,559,845	6,850,835
Debt securities held for investment, Fair Value	1,190	2,383
Loans held for sale, Fair Value	3,489	6,232
FINANCIAL LIABILITIES
Deposits, Carrying Amount	10,700,122	10,974,228
Short-term borrowings, Carrying Amount	3,351	300
Subordinated debt, Carrying Amount	86,101	86,044
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS
Loan commitments, Fair Value	4,875	4,598
Letters of credit, Fair Value	637	542
Level 2 Inputs [Member]
FINANCIAL ASSETS
Cash and cash equivalents, Carrying Amount	2,397,463	3,168,910
Federal funds sold, Carrying Amount	1,316	2,850
Debt securities held for investment, Carrying Amount	5	13
Loans held for sale, Carrying Amount	3,489	6,232
Cash and cash equivalents, Fair Value	2,397,463	3,168,910
Federal funds sold, Fair Value	1,316	2,850
Debt securities held for investment, Fair Value	5	13
Loans held for sale, Fair Value	3,489	6,232
FINANCIAL LIABILITIES
Deposits, Carrying Amount	10,700,122	10,974,228
Short-term borrowings, Carrying Amount	3,351	300
Subordinated debt, Carrying Amount	86,101	86,044
Deposits, Fair Value	10,413,348	10,614,840
Short-term borrowings, Fair Value	3,351	300
Subordinated debt, Fair Value	79,271	82,385
Level 3 Inputs [Member]
FINANCIAL ASSETS
Debt securities held for investment, Carrying Amount	1,185	2,370
Loans held for investment, net of allowance for credit losses Carrying Amount	7,559,845	6,850,835
Debt securities held for investment, Fair Value	1,185	2,370
Loans held for investment, net of allowance for credit losses, Fair Value	$ 7,356,768	$ 6,563,755

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Derivative Financial Instruments - Summary of Notional Amounts and Estimated Fair Values of Oil and Gas Derivative Positions Outstanding (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative assets, Estimated Fair Value	$ 41,099	$ 20,745
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Interest Receivable and Other Assets	Interest Receivable and Other Assets
Derivative liabilities, Estimated Fair Value	$ (39,176)	$ (19,683)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
Not Designated as Hedging Instrument [Member] | Oil and Natural Gas Swaps and Options [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Estimated Fair Value	$ 41,099	$ 20,745
Derivative liabilities, Estimated Fair Value	(39,176)	(19,683)
Not Designated as Hedging Instrument [Member] | Oil and Natural Gas Swaps and Options [Member] | Oil [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Notional Amount	3,896	2,698
Derivative liabilities, Notional Amount	(3,896)	(2,698)
Derivative assets, Estimated Fair Value	20,567	8,868
Derivative liabilities, Estimated Fair Value	(19,512)	(8,259)
Not Designated as Hedging Instrument [Member] | Oil and Natural Gas Swaps and Options [Member] | Natural Gas [Member]
Derivatives, Fair Value [Line Items]
Derivative assets, Notional Amount	46,140	25,059
Derivative liabilities, Notional Amount	(46,140)	(25,059)
Derivative assets, Estimated Fair Value	20,532	11,877
Derivative liabilities, Estimated Fair Value	$ (19,664)	$ (11,424)

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Derivative Financial Instruments - Summary of Company's Recognized Income Related to Activity Included in Other Noninterest Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other	Noninterest Income, Other	Noninterest Income, Other
Oil and Natural Gas Swaps and Options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative income	$ 701	$ 416	$ 266

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Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Percentage share of total profit	35.00%
Other Assets [Member] | Oil and Gas Reserves [Member]
Derivative [Line Items]
Derivative instrument asset margin amount		$ 6.6
Other Liabilities | Oil and Gas Reserves [Member]
Derivative [Line Items]
Derivative instrument liability margin amount	$ 15.5

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Derivative Financial Instruments - Summary of Company's Net Credit Exposure Relating to Oil and Gas Swaps and Options with Bank Counterparties (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Oil and Natural Gas Swaps and Options [Member]
Credit Derivatives [Line Items]
Credit exposure	$ 39,527	$ 6,560

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Segment Information - Results of Operations and Selected Financial Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net interest income	$ 424,456	$ 373,673	$ 315,657
Provision for/(benefit from) credit losses	7,458	10,076	(8,690)
Noninterest income	185,408	183,747	170,032
Depreciation and amortization	22,189	22,048	20,041
Other expenses	310,269	287,864	265,940
Income before taxes	269,948	237,432	208,398
Total assets	12,372,042	12,387,863	9,405,612
Capital expenditures	22,504	19,785	27,251
Operating Segments [Member] | BancFirst Metropolitan Banks [Member]
Segment Reporting Information [Line Items]
Net interest income	120,226	97,728	77,840
Provision for/(benefit from) credit losses	4,836	2,186	(5,474)
Noninterest income	24,793	32,756	23,257
Depreciation and amortization	2,347	2,821	2,593
Other expenses	46,329	42,583	39,356
Income before taxes	91,507	82,894	64,622
Total assets	3,598,888	3,412,369	2,627,874
Capital expenditures	2,752	2,026	1,612
Operating Segments [Member] | BancFirst Community Banks [Member]
Segment Reporting Information [Line Items]
Net interest income	229,196	208,728	180,925
Provision for/(benefit from) credit losses	2,331	2,451	(4,694)
Noninterest income	70,824	72,385	65,600
Depreciation and amortization	10,514	10,453	10,483
Other expenses	123,554	117,248	110,574
Income before taxes	163,621	150,961	130,162
Total assets	7,012,905	6,886,066	5,821,220
Capital expenditures	5,156	10,146	7,390
Operating Segments [Member] | Pegasus [Member]
Segment Reporting Information [Line Items]
Net interest income	51,277	46,439	24,222
Provision for/(benefit from) credit losses	(328)	2,840	1,395
Noninterest income	1,646	1,026	1,448
Depreciation and amortization	804	789	782
Other expenses	20,084	19,013	15,317
Income before taxes	32,363	24,823	8,176
Total assets	1,280,618	1,404,033	1,045,699
Capital expenditures	528	311	363
Operating Segments [Member] | Worthington [Member]
Segment Reporting Information [Line Items]
Net interest income	17,395	14,919
Provision for/(benefit from) credit losses	564	(43)
Noninterest income	1,170	1,034
Depreciation and amortization	496	398
Other expenses	13,636	9,280
Income before taxes	3,869	6,318
Total assets	600,364	541,002
Capital expenditures	5,497	262
Operating Segments [Member] | Other Financial Services [Member]
Segment Reporting Information [Line Items]
Net interest income	4,164	8,065	35,244
Provision for/(benefit from) credit losses	79	(161)	109
Noninterest income	52,711	50,643	47,124
Depreciation and amortization	481	519	557
Other expenses	37,495	36,271	60,435
Income before taxes	18,820	22,079	21,267
Total assets	121,601	171,679	71,694
Capital expenditures	108	67	400
Operating Segments [Member] | Executive, Operations & Support [Member]
Segment Reporting Information [Line Items]
Net interest income	2,198	(2,226)	(3,295)
Provision for/(benefit from) credit losses	(24)	2,803	(26)
Noninterest income	250,968	223,844	203,005
Depreciation and amortization	7,547	7,068	5,626
Other expenses	70,293	64,325	41,199
Income before taxes	175,350	147,422	152,911
Total assets	1,307,714	1,473,443	1,201,974
Capital expenditures	8,463	6,973	17,486
Eliminations [Member]
Segment Reporting Information [Line Items]
Net interest income		20	721
Noninterest income	(216,704)	(197,941)	(170,402)
Other expenses	(1,122)	(856)	(941)
Income before taxes	(215,582)	(197,065)	(168,740)
Total assets	$ (1,550,048)	$ (1,500,729)	$ (1,362,849)

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Subsequent Event - Additional Information (Detail) - USD ($) $ in Thousands	Feb. 08, 2022	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Subsequent Event [Line Items]
Debt securities. average yield percentage				0.16%
Total assets		$ 12,372,042	$ 12,387,863		$ 9,405,612
Total loans		7,656,645	6,943,563
Deposits		$ 10,700,122	$ 10,974,228
Worthington National Bank [Member]
Subsequent Event [Line Items]
Purchase price	$ 77,700
Total assets	478,000
Total loans	257,000
Deposits	$ 430,000