10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

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

For the quarterly period ended June 30, 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 charter)

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

100 N. Broadway Ave., Oklahoma City, Oklahoma	73102-8405
(Address of principal executive offices)	(Zip Code)

(405) 270-1086

(Registrant’s telephone number, including area code)

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

Indicate by check mark whether the registrant (1) has filed all reports required to be filed 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 (sec. 232-405 of this chapter) 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, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” 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 is a shell company (as defined by Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of July 31, 2023 there were 32,941,756 shares of the registrant’s Common Stock outstanding.

BancFirst Corporation

Quarterly Report on Form 10-Q

June 30, 2023

Table of Contents

Item	PART I – Financial Information	Page
1.	Financial Statements (Unaudited)	2
	Consolidated Balance Sheets	2
	Consolidated Statements of Comprehensive Income	3
	Consolidated Statements of Shareholders’ Equity	4
	Consolidated Statements of Cash Flow	5
	Notes to Consolidated Financial Statements	6
2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	30
3.	Quantitative and Qualitative Disclosure About Market Risk	40
4.	Controls and Procedures	40
	PART II – Other Information
1.	Legal Proceedings	41
1A.	Risk Factors	41
2.	Unregistered Sales of Equity Securities	41
3.	Defaults Upon Senior Securities	41
4.	Mine Safety Disclosures	41
5.	Other Information	41
6.	Exhibits	42
Signatures		43

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements.

BANCFIRST CORPORATION

CONSOLIDATED BALANCE SHEETS

(Dollars in thousands)

	June 30,			December 31,
	2023			2022
	(unaudited)			(see Note 1)
ASSETS
Cash and due from banks	$	221,138		$	259,049
Interest-bearing deposits with banks		2,188,004			2,909,861
Federal funds sold		4,481			2,850
Debt securities held for investment (fair value: $1,193 and $2,383, respectively)		1,193			2,383
Debt securities available for sale at fair value		1,569,427			1,538,221
Loans held for sale		8,783			6,232
Loans held for investment (net of unearned interest)		7,298,692			6,943,563
Allowance for credit losses		(96,920	)		(92,728	)
Loans, net of allowance for credit losses		7,201,772			6,850,835
Premises and equipment, net		279,758			278,088
Other real estate owned		41,270			36,756
Intangible assets, net		18,223			19,983
Goodwill		182,055			182,055
Accrued interest receivable and other assets		304,161			301,550
Total assets	$	12,020,265		$	12,387,863
LIABILITIES AND STOCKHOLDERS' EQUITY
Deposits:
Noninterest-bearing	$	4,285,620		$	4,944,730
Interest-bearing		6,189,560			6,029,498
Total deposits		10,475,180			10,974,228
Short-term borrowings		3,893			300
Accrued interest payable and other liabilities		114,329			76,455
Subordinated debt		86,072			86,044
Total liabilities		10,679,474			11,137,027
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: 32,939,256 and 32,875,560, respectively		32,939			32,876
Capital surplus		172,358			169,231
Retained earnings		1,206,499			1,120,292
Accumulated other comprehensive loss, net of tax benefit of $21,953       and $22,107, respectively		(71,005	)		(71,563	)
Total stockholders' equity		1,340,791			1,250,836
Total liabilities and stockholders' equity	$	12,020,265		$	12,387,863

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

2

BANCFIRST CORPORATION

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

(Dollars in thousands, except per share data)

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2023			2022			2023			2022
INTEREST INCOME
Loans, including fees	$	114,612		$	78,726		$	219,008		$	151,680
Debt securities:
Taxable		9,408			5,142			18,399			8,923
Tax-exempt		23			23			30			49
Federal funds sold		81			5			113			6
Interest-bearing deposits with banks		26,694			7,600			58,714			9,357
Total interest income		150,818			91,496			296,264			170,015
INTEREST EXPENSE
Deposits		43,732			3,586			78,909			5,567
Short-term borrowings		129			12			212			13
Subordinated debt		1,031			1,031			2,061			2,061
Total interest expense		44,892			4,629			81,182			7,641
Net interest income		105,926			86,867			215,082			162,374
Provision for credit losses		2,824			501			5,146			3,437
Net interest income after provision for credit losses		103,102			86,366			209,936			158,937
NONINTEREST INCOME
Trust revenue		4,590			3,949			8,812			7,455
Service charges on deposits		22,268			21,618			43,499			42,993
Securities transactions (includes accumulated other comprehensive loss reclassifications of $0, $0, $0 and $1,536, respectively)		110			—			(103	)		(3,915	)
Income from sales of loans		757			1,256			1,361			2,922
Insurance commissions		6,225			5,302			14,966			12,729
Cash management		7,927			4,447			14,661			7,578
Gain on sale of other assets		315			118			794			163
Other		5,782			5,908			11,812			16,323
Total noninterest income		47,974			42,598			95,802			86,248
NONINTEREST EXPENSE
Salaries and employee benefits		49,803			45,284			99,055			89,216
Occupancy, net		5,118			4,734			10,101			9,137
Depreciation		4,769			4,647			9,412			9,422
Amortization of intangible assets		880			857			1,760			1,688
Data processing services		2,217			1,975			4,324			3,780
Net expense from other real estate owned		2,889			(510	)		5,348			1,284
Marketing and business promotion		1,900			1,591			4,427			3,664
Deposit insurance		1,463			1,196			3,076			2,324
Other		12,071			13,943			23,924			25,714
Total noninterest expense		81,110			73,717			161,427			146,229
Income before taxes		69,966			55,247			144,311			98,956
Income tax expense		14,956			10,540			31,768			18,334
Net income	$	55,010		$	44,707		$	112,543		$	80,622
NET INCOME PER COMMON SHARE
Basic	$	1.67		$	1.36		$	3.42		$	2.46
Diluted	$	1.64		$	1.34		$	3.36		$	2.42
OTHER COMPREHENSIVE (LOSS)/GAIN
Unrealized (loss)/income on debt securities, net of tax benefit/(expense) of $4,350, $5,240, $(154) and $15,459, respectively		(14,091	)		(16,972	)		558			(49,805	)
Reclassification adjustment for loss included in net income, net of tax expense of $0, $0, $0 and $369, respectively		—			—			—			1,167
Other comprehensive (loss)/income, net of tax benefit/(expense) of $4,350, $5,240, $(154) and $15,090, respectively		(14,091	)		(16,972	)		558			(48,638	)
Comprehensive income	$	40,919		$	27,735		$	113,101		$	31,984

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

3

BANCFIRST CORPORATION

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Unaudited)

(Dollars in thousands)

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2023			2022			2023			2022
COMMON STOCK
Issued at beginning of period	$	32,900		$	32,726		$	32,876		$	32,603
Shares issued for stock options		39			55			63			178
Issued at end of period	$	32,939		$	32,781		$	32,939		$	32,781
CAPITAL SURPLUS
Balance at beginning of period	$	170,231		$	163,392		$	169,231		$	159,914
Common stock issued for stock options		1,296			1,443			1,914			4,463
Stock-based compensation arrangements		831			460			1,213			918
Balance at end of period	$	172,358		$	165,295		$	172,358		$	165,295
RETAINED EARNINGS
Balance at beginning of period	$	1,164,665		$	1,001,200		$	1,120,292		$	977,067
Net income		55,010			44,707			112,543			80,622
Dividends on common stock ($0.40, $0.36, $0.80 and $0.72  per share, respectively)		(13,176	)		(11,800	)		(26,336	)		(23,582	)
Balance at end of period	$	1,206,499		$	1,034,107		$	1,206,499		$	1,034,107
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized (losses)/gains on securities:
Balance at beginning of period	$	(56,914	)	$	(29,516	)	$	(71,563	)	$	2,150
Net change		(14,091	)		(16,972	)		558			(48,638	)
Balance at end of period	$	(71,005	)	$	(46,488	)	$	(71,005	)	$	(46,488	)
Total stockholders’ equity	$	1,340,791		$	1,185,695		$	1,340,791		$	1,185,695

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

4

BANCFIRST CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOW

(Unaudited)

(Dollars in thousands)

	Six Months Ended
	June 30,
	2023			2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	112,543		$	80,622
Adjustments to reconcile to net cash provided by operating activities:
Provision for credit losses		5,146			3,437
Depreciation and amortization		11,172			11,110
Net amortization of securities premiums and discounts		(577	)		2,773
Realized securities losses		103			3,915
Gain on sales of loans		(1,361	)		(2,922	)
Cash receipts from the sale of loans originated for sale		77,758			155,075
Cash disbursements for loans originated for sale		(78,948	)		(134,737	)
Deferred income tax benefit		(1,489	)		(1,806	)
Gain on sale of other assets		(1,061	)		(3,996	)
Increase in interest receivable		(3,387	)		(5,065	)
Increase in interest payable		3,005			160
Amortization of stock-based compensation arrangements		1,213			918
Excess tax benefit from stock-based compensation arrangements		(734	)		(1,771	)
Other, net		5,797			12,127
Net cash provided by operating activities		129,180			119,840
INVESTING ACTIVITIES
Net cash received from acquisitions, net of cash paid		—			121,099
Net (increase)/decrease in federal funds sold		(1,631	)		1,888
Purchases of available for sale debt securities		(94,112	)		(1,009,340	)
Proceeds from maturities, calls and paydowns of held for investment debt securities		1,349			66
Proceeds from maturities, calls and paydowns of available for sale debt securities		64,036			44,915
Proceeds from sales of available for sale securities		—			222,473
Purchase of equity securities		(294	)		(208	)
Proceeds from paydowns and sales of equity securities		531			699
Net change in loans		(357,140	)		(190,135	)
Net receipts/(payments) on derivative asset contracts		11,628			(84,932	)
Purchases of premises, equipment and computer software		(13,016	)		(11,869	)
Purchase of tax credits		(3,813	)		(3,676	)
Other, net		23,302			10,519
Net cash used in investing activities		(369,160	)		(898,501	)
FINANCING ACTIVITIES
Net change in deposits		(499,048	)		2,620,757
Net change in short-term borrowings		3,593			6,100
Issuance of common stock in connection with stock options, net		1,977			4,641
Cash dividends paid		(26,310	)		(23,518	)
Net cash (used in) provided by financing activities		(519,788	)		2,607,980
Net (decrease)/increase in cash, due from banks and interest-bearing deposits		(759,768	)		1,829,319
Cash, due from banks and interest-bearing deposits at the beginning of the period		3,168,910			2,050,022
Cash, due from banks and interest-bearing deposits at the end of the period	$	2,409,142		$	3,879,341
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	$	78,176		$	7,456
Cash paid during the period for income taxes	$	31,180		$	14,080
Noncash investing and financing activities:
Cash consideration for acquisitions	$	—		$	77,685
Fair value of assets acquired in acquisitions	$	—		$	511,466
Liabilities assumed in acquisitions	$	—		$	433,782
Unpaid common stock dividends declared	$	13,176		$	11,801

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

5

BANCFIRST CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

(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 significant accounting policies can be found in Note (1) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

Basis of Presentation

The accompanying unaudited interim consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., Pegasus Bank ("Pegasus"), Worthington Bank ("Worthington") and BancFirst and its subsidiaries ("BancFirst"). The principal operating subsidiaries of BancFirst are BFTower, LLC, BFC-PNC 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 unaudited interim consolidated financial statements.

The accompanying unaudited interim consolidated financial statements and notes are presented in accordance with U.S. GAAP for interim financial information and the instructions for Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). The information contained in the consolidated financial statements and footnotes included in BancFirst Corporation’s Annual Report on Form 10-K for the year ended December 31, 2022, should be referred to in connection with these unaudited interim consolidated financial statements. Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period.

The unaudited interim consolidated financial statements contained herein reflect all adjustments, which are, in the opinion of management, necessary to provide a fair statement of the financial position and results of operations of the Company for the interim periods presented. All such adjustments are of a normal and recurring nature.

Reclassifications

Certain loan segments from 2022 have been reclassified to conform to the 2023 presentation. Such reclassifications had no effect on previously reported balance sheets, cash flows, stockholders’ equity or comprehensive income.

Use of Estimates in the Preparation of 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 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.

Recent Accounting Pronouncements

Standards Adopted During the Current Period:

In March 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 January 1, 2023. ASU No. 2022-02 did not have a significant impact on the Company’s consolidated financial statements.

In March 2023, the 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

6

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") and Low-Income Housing Tax Credits ("LIHTC") that will be affected by ASU 2023-02. Upon adoption of ASU No. 2023-02, the Company recorded $21.8 million in other assets and other liabilities on the consolidated balance sheet for unfunded LIHTC commitments and amortized $977,000 of NMTC 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.

(2) RECENT DEVELOPMENTS, INCLUDING MERGERS AND ACQUISITIONS

On July 28, 2023, the Company's wholly-owned subsidiary BancFirst applied to become a Federal Reserve System member bank, which would change its primary regulator from the Federal Deposit Insurance Corporation (“FDIC”) to the Federal Reserve System. The Company expects its other wholly-owned subsidiaries Pegasus and Worthington will also apply for Federal Reserve System membership. The BancFirst application is pending approval from the Federal Reserve System.

On February 8, 2022, the Company acquired Worthington for an aggregate cash purchase price of $77.7 million. Worthington is 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. At acquisition, 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 complements the Company by expanding its Texas presence in the Dallas-Fort Worth market.

(3) 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
June 30, 2023	(Dollars in thousands)
Mortgage backed securities (1)	$	8	$	—	$	—	$	8
States and political subdivisions		685		—		—		685
Other securities		500		—		—		500
Total	$	1,193	$	—	$	—	$	1,193
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

7

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
June 30, 2023	(Dollars in thousands)
U.S. treasuries	$	1,599,593	$	—	$	(89,527	)	$	1,510,066
U.S. federal agencies		13,368		170		(2	)		13,536
Mortgage backed securities (1)		17,479		10		(1,869	)		15,620
States and political subdivisions		10,998		21		(133	)		10,886
Asset backed securities		12,784		—		(349	)		12,435
Other securities		8,163		—		(1,279	)		6,884
Total	$	1,662,385	$	201	$	(93,159	)	$	1,569,427
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.

On January 10, 2022, the Company purchased United States Treasury Notes of $600 million par value with an average yield of 1.42% and an average maturity of 53 months.

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.

	June 30, 2023				December 31, 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		842		842		1,195		1,195
After five years but within ten years		1		1		2		2
After ten years		—		—		—		—
Total	$	1,193	$	1,193	$	2,383	$	2,383
Available for Sale
Contractual maturity of debt securities:
Within one year	$	150,837	$	147,496	$	101,607	$	100,655
After one year but within five years		1,269,157		1,187,686		1,316,874		1,233,725
After five years but within ten years		202,889		196,755		170,513		163,101
After ten years		39,502		37,490		42,897		40,740
Total debt securities	$	1,662,385	$	1,569,427	$	1,631,891	$	1,538,221

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

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Book value of pledged securities	$	593,260	$	573,952

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

	For the Six Months Ended June 30,
	2023		2022
	(Dollars in thousands)
Proceeds	$	—	$	222,473
Gross losses realized		—		3,990

There were no sales of debt securities and therefore no proceeds from sales or realized securities gains or losses on available for sale debt securities for the six months ended June 30, 2023. During the six months ended June 30, 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.

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

The following table summarizes debt securities with unrealized losses, segregated by the duration of the unrealized loss, at June 30, 2023 and December 31, 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)
June 30, 2023
Available for Sale
U.S. treasuries		73	$	414,002	$	13,360	$	1,096,064	$	76,167	$	1,510,066	$	89,527
U.S. federal agencies		3		1,305		2		—		—		1,305		2
Mortgage backed securities		91		1,452		5		13,899		1,864		15,351		1,869
States and political subdivisions		10		2,029		22		1,251		111		3,280		133
Asset backed securities		1		—		—		12,435		349		12,435		349
Other securities		3		4,476		687		2,408		592		6,884		1,279
Total		181	$	423,264	$	14,076	$	1,126,057	$	79,083	$	1,549,321	$	93,159
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 June 30, 2023 and December 31, 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 statement of comprehensive income.

9

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

Certain loan segments from 2022 have been reclassified to conform to the 2023 presentation. Each loan segment is made up 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.

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

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied		969,914		908,494
Commercial real estate non-owner occupied		1,412,476		1,383,150
Construction and development < 60 months		549,068		475,236
Construction residential real estate < 60 months		276,726		303,305
Residential real estate first lien		1,189,944		1,117,899
Residential real estate all other		219,752		196,198
Agriculture		422,327		408,037
Commercial non-real estate		1,349,789		1,241,454
Consumer non-real estate		457,897		446,756
Oil and gas		450,799		463,034
Total (1)	$	7,298,692	$	6,943,563
(1) Excludes accrued interest receivable of $34.3 million at June 30, 2023 and $30.6 million at December 31, 2022, that is recorded in accrued interest receivable and other assets.

The Company's loans are currently 85% held by BancFirst and 15% 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 Company's portfolio segment descriptions and the weighted average remaining life of portfolio segments are disclosed in Note (5) to the Company's Annual Report on Form 10-K for the year ended December 31, 2022.

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:

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Other real estate owned and repossessed assets	$	41,612	$	36,936

As of both June 30, 2023 and December 31, 2022, other real estate owned included a commercial real estate property recorded at approximately $32.9 million and $29.4 million, respectively. 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.

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)
Rental income	$	2,778	$	2,643	$	5,468	$	5,313
Operating expense		2,967		2,299		5,348		4,738

10

During the six months ended June 30, 2023, the Company sold property held in other real estate owned for a total gain of $266,000, compared to a total gain of $3.8 million in the six months ended June 30, 2022.

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 $9.7 million during the period ended June 30, 2023.

Nonaccrual loans

The Company did not recognize any interest income on nonaccrual loans for either of the six months ended June 30, 2023 or 2022. In addition, there were no nonaccrual loans for which there is no related allowance for credit losses at both June 30, 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 approximately $718,000 for the six months ended June 30, 2023 and approximately $653,000 for the six months ended June 30, 2022.

Nonaccrual loans guaranteed by government agencies totaled approximately $6.6 million at June 30, 2023 and approximately $4.7 million at December 31, 2022.

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

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	4,360	$	1,795
Commercial real estate non-owner occupied		706		667
Construction and development < 60 months		81		93
Construction residential real estate < 60 months		376		430
Residential real estate first lien		2,717		1,947
Residential real estate all other		845		55
Agriculture		2,141		2,734
Commercial non-real estate		6,497		7,066
Consumer non-real estate		241		192
Oil and gas		83		320
Total	$	18,047	$	15,299

11

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
(Dollars in thousands)	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
As of June 30, 2023
Real estate:
Commercial real estate owner occupied	$	2,439	$	1,684	$	6,844	$	10,967	$	958,947	$	969,914	$	4,152
Commercial real estate non-owner occupied		236		8,752		875		9,863		1,402,613		1,412,476		213
Construction and development < 60 months		52		—		984		1,036		548,032		549,068		903
Construction residential real estate < 60 months		1,342		103		543		1,988		274,738		276,726		543
Residential real estate first lien		2,597		1,328		2,534		6,459		1,183,485		1,189,944		879
Residential real estate all other		1,092		280		840		2,212		217,540		219,752		61
Agriculture		833		268		838		1,939		420,388		422,327		50
Commercial non-real estate		3,795		928		6,055		10,778		1,339,011		1,349,789		1,567
Consumer non-real estate		2,405		807		569		3,781		454,116		457,897		431
Oil and gas		236		654		83		973		449,826		450,799		—
Total	$	15,027	$	14,804	$	20,165	$	49,996	$	7,248,696	$	7,298,692	$	8,799
	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
As of 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 and the table summarizing the Company’s gross loans held for investment by year of origination and internally assigned credit grades as of December 31, 2022, are disclosed in Note (5) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

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

12

The following table 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
(Dollars in thousands)	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
As of June 30, 2023
Commercial real estate owner occupied
Grade 1	$	75,514	$	174,029	$	131,583	$	96,065	$	91,649	$	150,940	$	51,100	$	770,880
Grade 2		22,851		42,130		30,830		24,524		19,136		30,000		18,248		187,719
Grade 3		19		—		4,450		1,193		883		1,459		212		8,216
Grade 4		—		314		345		311		1,166		624		—		2,760
Grade 5		—		—		—		—		339		—		—		339
Total commercial real estate owner occupied		98,384		216,473		167,208		122,093		113,173		183,023		69,560		969,914
Commercial real estate non-owner occupied
Grade 1	$	116,433	$	324,990	$	221,196	$	159,511	$	92,137	$	79,849	$	45,799	$	1,039,915
Grade 2		44,955		107,929		43,476		33,416		32,628		71,739		23,609		357,752
Grade 3		—		6,733		5		150		6,207		795		—		13,890
Grade 4		44		820		—		—		—		55		—		919
Total commercial real estate non-owner occupied		161,432		440,472		264,677		193,077		130,972		152,438		69,408		1,412,476
Construction and development < 60 months
Grade 1	$	88,593	$	139,210	$	77,235	$	14,074	$	4,622	$	6,522	$	70,118	$	400,374
Grade 2		42,927		36,862		15,894		1,584		13,984		2,418		33,679		147,348
Grade 3		—		903		103		98		—		7		154		1,265
Grade 4		—		81		—		—		—		—		—		81
Total construction and development < 60 months		131,520		177,056		93,232		15,756		18,606		8,947		103,951		549,068
Construction residential real estate < 60 months
Grade 1	$	106,520	$	80,355	$	1,897	$	257	$	6	$	39	$	33,846	$	222,920
Grade 2		25,787		26,221		38		22		—		388		90		52,546
Grade 3		99		785		—		—		—		—		—		884
Grade 4		376		—		—		—		—		—		—		376
Total construction residential real estate < 60 months		132,782		107,361		1,935		279		6		427		33,936		276,726
Residential real estate first lien
Grade 1	$	160,801	$	256,377	$	189,258	$	130,017	$	78,783	$	168,639	$	3,721	$	987,596
Grade 2		21,024		46,624		35,716		24,654		12,691		44,160		—		184,869
Grade 3		1,236		1,867		2,959		1,035		1,664		3,926		—		12,687
Grade 4		361		177		1,181		292		646		2,135		—		4,792
Total residential real estate first lien		183,422		305,045		229,114		155,998		93,784		218,860		3,721		1,189,944
Residential real estate all other
Grade 1	$	25,642	$	28,209	$	8,615	$	9,218	$	4,625	$	14,003	$	39,561	$	129,873
Grade 2		2,380		4,982		2,202		1,983		1,509		3,476		69,231		85,763
Grade 3		171		422		77		45		146		471		1,877		3,209
Grade 4		—		24		10		26		—		50		797		907
Total residential real estate all other		28,193		33,637		10,904		11,272		6,280		18,000		111,466		219,752
Agriculture
Grade 1	$	32,122	$	61,718	$	39,267	$	32,007	$	18,986	$	36,796	$	39,208	$	260,104
Grade 2		18,303		23,027		19,601		8,718		9,835		17,869		43,466		140,819
Grade 3		6,781		1,204		1,527		3,396		144		3,815		3,255		20,122
Grade 4		59		668		57		169		44		254		31		1,282
Total Agriculture		57,265		86,617		60,452		44,290		29,009		58,734		85,960		422,327
Commercial non-real estate
Grade 1	$	148,198	$	288,490	$	176,959	$	48,809	$	42,278	$	43,672	$	293,889	$	1,042,295
Grade 2		55,938		65,449		28,746		16,090		10,820		21,080		96,657		294,780
Grade 3		1,208		2,284		575		172		619		1,381		2,491		8,730
Grade 4		11		983		348		693		372		279		1,034		3,720
Grade 5		—		—		—		—		264		—		—		264
Total commercial non-real estate		205,355		357,206		206,628		65,764		54,353		66,412		394,071		1,349,789
Consumer non-real estate
Grade 1	$	118,847	$	146,280	$	76,246	$	27,782	$	13,664	$	4,737	$	26,330	$	413,886
Grade 2		7,960		16,721		8,236		2,766		971		1,804		1,642		40,100
Grade 3		155		984		1,013		401		245		115		16		2,929
Grade 4		39		392		352		44		85		25		4		941
Grade 5		—		41		—		—		—		—		—		41
Total consumer non-real estate		127,001		164,418		85,847		30,993		14,965		6,681		27,992		457,897
Oil and gas
Grade 1	$	62,557	$	13,971	$	96,748	$	12,909	$	2,273	$	17,373	$	159,813	$	365,644
Grade 2		6,779		5,334		2,251		432		18,470		255		47,498		81,019
Grade 3		—		2,091		240		3		—		—		1,719		4,053
Grade 4		—		83		—		—		—		—		—		83
Total oil and gas		69,336		21,479		99,239		13,344		20,743		17,628		209,030		450,799
Total loans held for investment	$	1,194,690	$	1,909,764	$	1,219,236	$	652,866	$	481,891	$	731,150	$	1,109,095	$	7,298,692

13

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
(Dollars in thousands)	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
Three months ended June 30, 2023
Commercial real estate owner occupied
Current-period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate non-owner occupied
Current-period gross charge-offs		—		—		—		—		—		—		—		—
Construction and development < 60 months
Current-period gross charge-offs		—		—		—		2		—		—		—		2
Construction residential real estate < 60 months
Current-period gross charge-offs		—		—		—		—		—		—		—		—
Residential real estate first lien
Current-period gross charge-offs		—		—		19		21		—		2		—		42
Residential real estate all other
Current-period gross charge-offs		—		2		—		—		—		—		—		2
Agriculture
Current-period gross charge-offs		—		—		—		301		1		—		—		302
Commercial non-real estate
Current-period gross charge-offs		42		34		1		20		—		5		—		102
Consumer non-real estate
Current-period gross charge-offs		29		186		115		14		28		11		15		398
Oil and gas
Current-period gross charge-offs		—		2		—		—		—		—		—		2
Total current-period gross charge-offs	$	71	$	224	$	135	$	358	$	29	$	18	$	15	$	850

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
(Dollars in thousands)	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
Six months ended June 30, 2023
Commercial real estate owner occupied
Current-period gross charge-offs	$	—	$	7	$	1	$	22	$	18	$	—	$	—	$	48
Commercial real estate non-owner occupied
Current-period gross charge-offs		—		—		—		—		—		3		—		3
Construction and development < 60 months
Current-period gross charge-offs		—		2		—		2		—		—		—		4
Construction residential real estate < 60 months
Current-period gross charge-offs		—		—		—		—		—		—		—		—
Residential real estate first lien
Current-period gross charge-offs		—		—		19		21		—		4		—		44
Residential real estate all other
Current-period gross charge-offs		—		4		19		—		1		4		—		28
Agriculture
Current-period gross charge-offs		—		4		—		317		14		2		—		337
Commercial non-real estate
Current-period gross charge-offs		42		101		63		20		—		52		—		278
Consumer non-real estate
Current-period gross charge-offs		29		262		147		29		37		17		17		538
Oil and gas
Current-period gross charge-offs		—		2		—		—		—		—		—		2
Total current-period gross charge-offs	$	71	$	382	$	249	$	411	$	70	$	82	$	17	$	1,282

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 CECL model. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist.

14

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)
Three Months Ended June 30, 2023
Real estate:
Commercial real estate owner occupied	$	6,547	$	—		$	3	$	3		$	258		$	6,808
Commercial real estate non-owner occupied		32,120		—			—		—			1,312			33,432
Construction and development < 60 months		3,608		(2	)		3		1			(169	)		3,440
Construction residential real estate < 60 months		3,226		—			—		—			327			3,553
Residential real estate first lien		4,454		(42	)		10		(32	)		333			4,755
Residential real estate all other		1,444		(2	)		1		(1	)		218			1,661
Agriculture		6,268		(302	)		7		(295	)		453			6,426
Commercial non-real estate		25,079		(102	)		127		25			23			25,127
Consumer non-real estate		4,232		(398	)		35		(363	)		475			4,344
Oil and gas		7,782		(2	)		—		(2	)		(406	)		7,374
Total	$	94,760	$	(850	)	$	186	$	(664	)	$	2,824		$	96,920

	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)
Six Months Ended June 30, 2023
Real estate:
Commercial real estate owner occupied	$	6,416	$	(48	)	$	52	$	4		$	388		$	6,808
Commercial real estate non-owner occupied		30,190		(3	)		—		(3	)		3,245			33,432
Construction and development < 60 months		3,778		(4	)		6		2			(340	)		3,440
Construction residential real estate < 60 months		3,275		—			—		—			278			3,553
Residential real estate first lien		4,092		(44	)		13		(31	)		694			4,755
Residential real estate all other		1,418		(28	)		3		(25	)		268			1,661
Agriculture		6,217		(337	)		13		(324	)		533			6,426
Commercial non-real estate		25,106		(278	)		149		(129	)		150			25,127
Consumer non-real estate		4,132		(538	)		92		(446	)		658			4,344
Oil and gas		8,104		(2	)		—		(2	)		(728	)		7,374
Total	$	92,728	$	(1,282	)	$	328	$	(954	)	$	5,146		$	96,920

15

	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)
Three Months Ended June 30, 2022
Real estate:
Commercial real estate owner occupied	$	8,262	$	(4	)	$	30	$	26		$	(1,360	)	$	6,928
Commercial real estate non-owner occupied		16,348		—			—		—			(33	)		16,315
Construction and development < 60 months		3,272		—			2		2			406			3,680
Construction residential real estate < 60 months		1,103		—			—		—			80			1,183
Residential real estate first lien		3,394		(5	)		6		1			(40	)		3,355
Residential real estate all other		1,560		(36	)		—		(36	)		(44	)		1,480
Agriculture		8,018		—			4		4			(66	)		7,956
Commercial non-real estate		25,163		(717	)		26		(691	)		898			25,370
Consumer non-real estate		3,730		(153	)		42		(111	)		431			4,050
Oil and gas		16,389		—			—		—			229			16,618
Total	$	87,239	$	(915	)	$	110	$	(805	)	$	501		$	86,935

	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)
Six Months Ended June 30, 2022
Real estate:
Commercial real estate owner occupied	$	7,550	$	—	$	(20	)	$	78	$	58		$	(680	)	$	6,928
Commercial real estate non-owner occupied		16,807		—		—			—		—			(492	)		16,315
Construction and development < 60 months		3,454		—		—			5		5			221			3,680
Construction residential real estate < 60 months		1,051		—		—			—		—			132			1,183
Residential real estate first lien		3,048		2		(49	)		13		(36	)		341			3,355
Residential real estate all other		1,567		—		(36	)		402		366			(453	)		1,480
Agriculture		8,392		—		(125	)		7		(118	)		(318	)		7,956
Commercial non-real estate		25,565		48		(774	)		136		(638	)		395			25,370
Consumer non-real estate		3,694		28		(233	)		80		(153	)		481			4,050
Oil and gas		12,808		—		—			—		—			3,810			16,618
Total	$	83,936	$	78	$	(1,237	)	$	721	$	(516	)	$	3,437		$	86,935

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 six month period ended June 30, 2023. The credit-deteriorated loans purchased during the six months ended June 30, 2022 were as follows:

	Loans acquired with deteriorated credit quality
	(Dollars in thousands)
For the period ended June 30, 2022
Purchase price of loans at acquisition	$	661
Allowance for credit losses at acquisition		78
Par value of acquired loans at acquisition	$	739

16

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 six months ended June 30, 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
	(Dollars in thousands)
As of June 30, 2023
Real estate:
Commercial real estate owner occupied	$	2,129	$	—	$	—	$	—	$	2,129	$	863
Commercial real estate non-owner occupied		664		—		—		—		664		270
Construction and development < 60 months		—		—		—		—		—		—
Construction residential real estate < 60 months		376		—		—		—		376		45
Residential real estate first lien		371		—		—		—		371		118
Residential real estate all other		41		—		—		—		41		19
Agriculture		3,436		672		—		3,068		7,176		2,694
Commercial non-real estate		—		4,879		—		—		4,879		1,747
Consumer non-real estate		—		—		—		93		93		56
Oil and gas		—		—		—		—		—		—
Total collateral-dependent loans held for investment	$	7,017	$	5,551	$	—	$	3,161	$	15,729	$	5,812
	Collateral Type
	Real Estate		Business Assets		Energy Reserves		Other Assets		Total		Specific Allocation
	(Dollars in thousands)
As of December 31, 2022
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 and repossessed 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 and repossessed assets during the periods presented are summarized as follows:

	Six Months Ended June 30,
	2023		2022
	(Dollars in thousands)
Other real estate owned	$	667	$	4,065
Repossessed assets		946		503
Total	$	1,613	$	4,568

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(5) INTANGIBLE ASSETS AND GOODWILL

The following is a summary of intangible assets as of the date listed:

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Dollars in thousands)
June 30, 2023
Core deposit intangibles	$	33,298	$	(15,316	)	$	17,982
Customer relationship intangibles		3,350		(3,109	)		241
Total	$	36,648	$	(18,425	)	$	18,223
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

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)
Six months ended June 30, 2023
Balance at beginning and end of period	$	13,767	$	61,212	$	68,855	$	32,133	$	5,464	$	624	$	182,055

Additional information for intangible assets can be found in Note (7) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

(6) 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 were callable at par, in whole or in part, after 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 approximately $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.

18

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.

(7) STOCK-BASED COMPENSATION

The Company had a nonqualified incentive stock option plan, 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.

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 shall 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 June 30, 2023 there were 497,375 shares available for future grants. The restricted stock units ("RSU") vest beginning two years from the date of grant at the rate of 20% per year for five years. The fair value of each RSU granted is equal to the market price of the Company’s stock at date of grant.

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. The Company had no cash settlements during the six months ended June 30, 2023 or June 30, 2022.

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)
Six Months Ended June 30, 2023
Outstanding at December 31, 2022		1,310,290		$	52.51
Exercised		(45,899	)		33.54
Canceled, forfeited, or expired		(8,500	)		87.97
Outstanding at June 30, 2023		1,255,891			52.96	10.18 Yrs.	$	49,029
Exercisable at June 30, 2023		477,266			31.74	6.41 Yrs.	$	28,760

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)				(Dollars in thousands)
Total intrinsic value of options exercised	$	1,979	$	2,979	$	2,331	$	8,943
Cash received from options exercised		1,318		1,303		1,539		4,292
Tax benefit realized from options exercised		475		716		560		2,150

19

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 six months ended June 30, 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:

	Six Months Ended June 30,
	2023		2022
Weighted average grant-date fair value per share of options granted	$	—	$	29.08
Risk-free interest rate		—	1.75 to 3.25%
Dividend yield		—	2.00%
Stock price volatility		—	34.61 to 34.71%
Expected term		—	10 Yrs

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

			Wgtd. Avg.
	Restricted		Grant Date
	Stock Units		Fair Value
Six Months Ended June 30, 2023
Nonvested at December 31, 2022		—
Granted		2,625	$	93.66
Nonvested at June 30, 2023		2,625

The Company has had the BancFirst Corporation Directors’ Deferred Stock Compensation Plan (the “Deferred Stock Compensation Plan”) since May 1999. As of June 30, 2023, there are 22,252 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 17,797 and 13,288 shares of common stock distributed from the Deferred Stock Compensation Plan during the six months ended June 30, 2023 and 2022, respectively.

A summary of the accumulated stock units is as follows:

	June 30,		December 31,
	2023		2022
Accumulated stock units		115,848		129,609
Average price	$	38.26	$	34.91

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

20

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)				(Dollars in thousands)
Stock-based compensation expense	$	831	$	460	$	1,213	$	918
Tax benefit		200		111		292		221
Stock-based compensation expense, net of tax	$	631	$	349	$	921	$	697

The Company will continue to amortize the unearned stock-based compensation expense over the remaining vesting period of approximately seven years. The following table shows the unearned stock-based compensation expense:

	June 30, 2023
	(Dollars in thousands)
Unearned stock-based compensation expense	$	11,867

(8) STOCKHOLDERS’ EQUITY

In November 1999, the Company adopted 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 under the program:

	June 30, 2023
Shares remaining to be repurchased		500,486

21

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 June 30, 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:

				Required						To Be Well
				For Capital			With			Capitalized Under
				Adequacy			Capital Conservation			Prompt Corrective
	Actual			Purposes			Buffer			Action Provisions
	Amount		Ratio	Amount		Ratio	Amount		Ratio	Amount		Ratio
	(Dollars in thousands)
As of June 30, 2023:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,393,706	16.81%	$	663,195	8.00%	$	870,444	10.50%	N/A		N/A
BancFirst		1,160,255	16.23%		571,919	8.00%		750,644	10.50%	$	714,899	10.00%
Pegasus		138,455	17.62%		62,861	8.00%		82,505	10.50%		78,576	10.00%
Worthington		49,963	13.30%		30,055	8.00%		39,447	10.50%		37,568	10.00%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,211,518	14.61%	$	373,047	4.50%	$	580,296	7.00%	N/A		N/A
BancFirst		1,054,783	14.75%		321,705	4.50%		500,429	7.00%	$	464,684	6.50%
Pegasus		130,150	16.56%		35,359	4.50%		55,003	7.00%		51,074	6.50%
Worthington		46,200	12.30%		16,906	4.50%		26,698	7.00%		24,419	6.50%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,237,518	14.93%	$	497,396	6.00%	$	704,645	8.50%	N/A		N/A
BancFirst		1,074,783	15.03%		428,940	6.00%		607,664	8.50%	$	571,919	8.00%
Pegasus		130,150	16.56%		47,145	6.00%		66,789	8.50%		62,861	8.00%
Worthington		46,200	12.30%		22,541	6.00%		31,933	8.50%		30,055	8.00%
Tier 1 Capital
(to Quarterly Average Assets)-
BancFirst Corporation	$	1,237,518	10.50%	$	471,255	4.00%	N/A		N/A	N/A		N/A
BancFirst		1,074,783	10.63%		401,047	4.00%	N/A		N/A	$	501,309	5.00%
Pegasus		130,150	10.41%		50,026	4.00%	N/A		N/A		62,532	5.00%
Worthington		46,200	9.18%		20,136	4.00%	N/A		N/A		25,171	5.00%

As of June 30, 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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(9) NET INCOME PER COMMON SHARE

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

	Income (Numerator)		Shares (Denominator)		Per Share Amount
	(Dollars in thousands, except per share data)
Three Months Ended June 30, 2023
Basic
Income available to common stockholders	$	55,010		32,920,497	$	1.67
Dilutive effect of stock options		—		546,757
Diluted
Income available to common stockholders plus assumed exercises of stock options	$	55,010		33,467,254	$	1.64
Three Months Ended June 30, 2022
Basic
Income available to common stockholders	$	44,707		32,749,752	$	1.36
Dilutive effect of stock options		—		668,730
Diluted
Income available to common stockholders plus assumed exercises of stock options	$	44,707		33,418,482	$	1.34
Six Months Ended June 30, 2023
Basic
Income available to common stockholders	$	112,543		32,906,753	$	3.42
Dilutive effect of stock options		—		559,178
Diluted
Income available to common stockholders plus    assumed exercises of stock options	$	112,543		33,465,931	$	3.36
Six Months Ended June 30, 2022
Basic
Income available to common stockholders	$	80,622		32,708,563	$	2.46
Dilutive effect of stock options		—		658,236
Diluted
Income available to common stockholders plus    assumed exercises of stock options	$	80,622		33,366,799	$	2.42

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

	Shares
Three Months Ended June 30, 2023		305,407
Three Months Ended June 30, 2022		122,489
Six Months Ended June 30, 2023		307,608
Six Months Ended June 30, 2022		131,779

(10) 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.

23

•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 judgment or estimation. This category includes certain collaterally dependent 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.

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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)
June 30, 2023
Debt securities available for sale:
U.S. Treasury	$	1,510,066	$	—	$	—	$	1,510,066
U.S. federal agencies		—		13,536		—		13,536
Mortgage-backed securities		—		15,620		—		15,620
States and political subdivisions		—		10,459		427		10,886
Asset backed securities		—		12,435		—		12,435
Other debt securities		—		6,884		—		6,884
Derivative assets		—		23,340		—		23,340
Derivative liabilities		—		21,813		—		21,813
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:

	Six Months Ended June 30,			Twelve Months Ended December 31,
	2023			2022
	(Dollars in thousands)
Balance at the beginning of the year	$	454		$	320
Purchases		—			255
Settlements		(30	)		(110	)
Total unrealized gain		3			(11	)
Balance at the end of the period	$	427		$	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 six months ended June 30, 2023, the Company did not transfer any debt securities. In addition, 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

25

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 June 30, 2023
Equity securities	$	15,172
Collateral dependent loans		122
Repossessed assets		320
Other real estate owned		5,100
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 based on 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 debt 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

26

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:

	June 30, 2023				December 31, 2022
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(Dollars in thousands)
FINANCIAL ASSETS
Level 2 inputs:
Cash and cash equivalents	$	2,409,142	$	2,409,142	$	3,168,910	$	3,168,910
Federal funds sold		4,481		4,481		2,850		2,850
Debt securities held for investment		8		8		13		13
Loans held for sale		8,783		8,783		6,232		6,232
Level 3 inputs:
Debt securities held for investment		1,185		1,185		2,370		2,370
Loans, net of allowance for credit losses		7,201,772		6,915,262		6,850,835		6,563,755
FINANCIAL LIABILITIES
Level 2 inputs:
Deposits		10,475,180		10,096,793		10,974,228		10,614,840
Short-term borrowings		3,893		3,893		300		300
Subordinated debt		86,072		79,834		86,044		82,385
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS
Loan commitments				4,938				4,598
Letters of credit				530				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. 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 June 30, 2023 or December 31, 2022.

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(11) 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 June 30, 2023, the Company had a margin liability included in other liabilities in the amount of $5.5 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:

		June 30, 2023						December 31, 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		2,416		$	11,057			2,698		$	8,868
Derivative liabilities	Barrels		(2,416	)		(10,460	)		(2,698	)		(8,259	)
Gas/Natural Gas Liquids
Derivative assets	MMBTUs/Gallons		53,649			12,283			25,059			11,877
Derivative liabilities	MMBTUs/Gallons		(53,649	)		(11,353	)		(25,059	)		(11,424	)
Total Fair Value	Included in
Derivative assets	Other assets					23,340						20,745
Derivative liabilities	Other liabilities					(21,813	)					(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:

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)				(Dollars in thousands)
Derivative income	$	260	$	189	$	349	$	348

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 the 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:

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Credit exposure	$	21,093	$	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

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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.

(12) 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 and Fort Worth metropolitan areas. 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)
Three Months Ended June 30, 2023
Net interest income	$	29,269	$	57,617	$	13,509	$	4,123	$	1,058	$	350		$	—		$	105,926
Noninterest income		7,090		19,986		467		255		12,350		63,688			(55,862	)		47,974
Income before taxes		21,588		43,184		9,857		791		4,298		45,925			(55,677	)		69,966
Three Months Ended June 30, 2022
Net interest income	$	21,962	$	49,615	$	9,964	$	3,743	$	2,079	$	(505	)	$	9		$	86,867
Noninterest income		5,504		18,152		293		286		10,753		52,756			(45,146	)		42,598
Income before taxes		15,142		36,462		4,672		1,436		4,643		37,901			(45,009	)		55,247
Six Months Ended June 30, 2023
Net interest income	$	60,008	$	115,302	$	28,660	$	8,747	$	2,000	$	365		$	—		$	215,082
Noninterest income		13,177		39,518		681		534		26,522		129,831			(114,461	)		95,802
Income before taxes		44,898		86,783		19,501		2,421		10,462		94,342			(114,096	)		144,311
Six Months Ended June 30, 2022
Net interest income	$	41,570	$	94,183	$	17,584	$	5,437	$	4,992	$	(1,412	)	$	20		$	162,374
Noninterest income		15,277		34,997		484		419		23,736		95,330			(83,995	)		86,248
Income before taxes		33,313		67,801		7,499		1,821		10,688		61,549			(83,715	)		98,956
Total Assets:
June 30, 2023	$	3,436,504	$	6,810,321	$	1,276,354	$	542,292	$	241,921	$	1,217,957		$	(1,505,084	)	$	12,020,265
December 31, 2022		3,412,369		6,886,066		1,404,033		541,002		171,679		1,473,443			(1,500,729	)		12,387,863

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.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion and analysis of our financial condition as of June 30, 2023 and December 31, 2022 and results of operations for the three and six months ended June 30, 2023 should be read in conjunction with our consolidated financial statements and notes to the consolidated financial statements for the year ended December 31, 2022, and the other information included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022. Certain risks, uncertainties and other factors, including those set forth under "Risk Factors" in Part I, Item 1A of the 2022 Form 10-K, and "Item 1A, Risk Factors" in this Quarterly Report on Form 10-Q, may cause actual results to differ materially from the results discussed in the forward-looking statements appearing in this discussion and analysis.

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 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 for NSF and overdraft fees.

•Rising interest rates.

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

•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.

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SUMMARY

The Company’s net income for the second quarter of 2023 was $55.0 million, compared to $44.7 million for the second quarter of 2022. Diluted net income per common share was $1.64 and $1.34 for the second quarter of 2023 and 2022, respectively. The Company’s net interest income for the second quarter of 2023 increased to $105.9 million, compared to $86.9 million for the second quarter of 2022. Rising short-term interest rates and loan growth drove the increase. The net interest margin for the second quarter was 3.87%, compared to 3.05% a year ago. For the second quarter of 2023, the Company recorded a provision for credit losses of $2.8 million, compared to a provision for credit losses of $501,000 for the second quarter of 2022.

Noninterest income for the second quarter of 2023 totaled $48.0 million, compared to $42.6 million for the second quarter of 2022. The growth in noninterest income was mostly attributable to increased sweep account balances. Noninterest income for the second quarter of 2022 included $578,000 of income from an equity interest received from a prior loan settlement. The equity interest was sold during the second quarter of 2023 at no gain. The Company exceeded $10 billion in total assets at December 31, 2022. Pursuant to the Durbin Amendment of the Dodd-Frank Act, based on current run rates, this will cause a reduction of annual pretax income from debit card interchange fees of approximately $23 million beginning July 1, 2023.

Noninterest expense for the second quarter of 2023 increased to $81.1 million compared to $73.7 million for the second quarter of 2022. Higher noninterest expense was primarily related to an increase in salaries and employee benefits of $4.5 million. In addition, noninterest expense was lower in the second quarter of 2022 due to a gain from sale of the Company's prior headquarters that was netted against expenses.

The Company’s effective tax rate was 21.4% for the second quarter of 2023 compared to 19.1% for the second quarter of 2022. The Company adopted Accounting Standard Update ("ASU") 2023-02 on January 1, 2023, which increased income tax expenses. Exercises of stock options contributed to the lower effective tax rate in 2022.

At June 30, 2023, the Company’s total assets were $12.0 billion, a decrease of $367.6 million from December 31, 2022. Debt securities of $1.6 billion were up $30.0 million from December 31, 2022. Loans totaled $7.3 billion, an increase of $357.7 million from December 31, 2022. Deposits totaled $10.5 billion, a decrease of $499.0 million from December 31, 2022 as deposits generally flowed from demand deposits into the Company's off balance sheet sweep account product. Sweep accounts totaled $4.3 billion at June 30, 2023 up $567.7 million from December 31, 2022. The Company’s total stockholders’ equity at June 30, 2023 was $1.3 billion, an increase of $90.0 million over December 31, 2022.

At June 30, 2023, the Company’s nonaccrual loans were $18.0 million compared to $15.3 million at year-end 2022. Nonaccrual loans represented 0.25% of total loans at June 30, 2023, compared to 0.22% at December 31, 2022. The allowance for credit losses to total loans was 1.33% at both June 30, 2023 and December 31, 2022. Net charge-offs were 0.01% of average loans for the second quarter and year-to-date of both 2023 and 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. Although the percent of cash and due from banks, interest-bearing deposits with banks and federal funds sold to total assets has decreased to 20.1% at June, 30. 2023, compared to 25.6% at December 31, 2022, the Company is still highly liquid. The Company expects its net interest income to decrease for the last half of 2023 due to the decrease and change in mix of its deposits.

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

FUTURE APPLICATION OF ACCOUNTING STANDARDS

See Note (1) of the Notes to the Consolidated Financial Statements for disclosures regarding recently issued accounting pronouncements since December 31, 2022, the date of its most recent annual report to stockholders.

SEGMENT INFORMATION

See Note (12) of the Notes to the Consolidated Financial Statements for disclosures regarding business segments.

RESULTS OF OPERATIONS

Average Balances, Income, Expenses and Rates

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The following table presents, for the periods indicated, certain information related to the Company's consolidated average balance sheets, 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 $5.7 million for the three months ended June 30, 2023 compared to $6.3 million for the three months ended June 30, 2022. Loan fees included in interest income were $11.3 million for the six months ended June 30, 2023 compared to $13.7 million for the six months ended June 30, 2022.

BANCFIRST CORPORATION
CONSOLIDATED AVERAGE BALANCE SHEETS AND INTEREST MARGIN ANALYSIS
(Unaudited)
Taxable Equivalent Basis
(Dollars in thousands)
	Three Months Ended June 30,
	2023								2022
				Interest		Average						Interest		Average
	Average			Income/		Yield/			Average			Income/		Yield/
	Balance			Expense		Rate			Balance			Expense		Rate
ASSETS
Earning assets:
Loans (1)	$	7,247,283		$	114,708		6.35	%	$	6,566,437		$	78,836		4.82	%
Debt securities – taxable		1,604,422			9,408		2.35			1,192,371			5,142		1.73
Debt securities – tax exempt		3,251			29		3.59			3,682			28		3.08
Federal funds sold and interest-bearing deposits with banks		2,131,325			26,775		5.04			3,686,883			7,605		0.83
Total earning assets		10,986,281			150,920		5.51			11,449,373			91,611		3.21
Nonearning assets:
Cash and due from banks		200,165								291,470
Interest receivable and other assets		820,731								943,850
Allowance for credit losses		(95,887	)							(87,434	)
Total nonearning assets		925,009								1,147,886
Total assets	$	11,911,290							$	12,597,259
LIABILITIES AND STOCKHOLDERS’ EQUITY
Interest-bearing liabilities:
Transaction deposits	$	843,219		$	1,637		0.78	%	$	977,424		$	212		0.09	%
Savings deposits		4,456,909			37,667		3.39			4,328,065			2,733		0.25
Time deposits		747,101			4,428		2.38			665,660			641		0.39
Short-term borrowings		10,211			129		5.04			6,716			12		0.72
Subordinated debt		86,063			1,031		4.81			86,006			1,031		4.81
Total interest-bearing liabilities		6,143,503			44,892		2.93			6,063,871			4,629		0.31
Interest-free funds:
Noninterest-bearing deposits		4,328,005								5,223,063
Interest payable and other liabilities		109,732								126,279
Stockholders’ equity		1,330,050								1,184,046
Total interest free funds		5,767,787								6,533,388
Total liabilities and stockholders’ equity	$	11,911,290							$	12,597,259
Net interest income				$	106,028							$	86,982
Net interest spread							2.58	%							2.90	%
Effect of interest free funds							1.29	%							0.15	%
Net interest margin							3.87	%							3.05	%

32

BANCFIRST CORPORATION
CONSOLIDATED AVERAGE BALANCE SHEETS AND INTEREST MARGIN ANALYSIS
(Unaudited)
Taxable Equivalent Basis
(Dollars in thousands)
	Six Months Ended June 30,
	2023								2022
				Interest		Average						Interest		Average
	Average			Income/		Yield/			Average			Income/		Yield/
	Balance			Expense		Rate			Balance			Expense		Rate
ASSETS
Earning assets:
Loans (1)	$	7,127,174		$	219,189		6.20	%	$	6,463,687		$	151,902		4.74	%
Debt securities – taxable		1,588,439			18,399		2.34			1,149,037			8,923		1.57
Debt securities – tax exempt		3,366			38		2.29			4,225			62		2.95
Federal funds sold and interest-bearing deposits with banks		2,463,587			58,827		4.82			3,618,260			9,363		0.52
Total earning assets		11,182,566			296,453		5.35			11,235,209			170,250		3.06
Nonearning assets:
Cash and due from banks		209,115								280,304
Interest receivable and other assets		808,094								864,988
Allowance for credit losses		(94,609	)							(86,337	)
Total nonearning assets		922,600								1,058,955
Total assets	$	12,105,166							$	12,294,164
LIABILITIES AND STOCKHOLDERS’ EQUITY
Interest-bearing liabilities:
Transaction deposits	$	885,010		$	3,269		0.74	%	$	959,898		$	403		0.08	%
Savings deposits		4,440,577			68,158		3.10			4,249,720			3,874		0.18
Time deposits		726,558			7,482		2.08			659,907			1,290		0.39
Short-term borrowings		8,537			212		5.00			4,599			13		0.56
Subordinated debt		86,056			2,061		4.83			85,999			2,061		4.83
Total interest-bearing liabilities		6,146,738			81,182		2.66			5,960,123			7,641		0.26
Interest-free funds:
Noninterest-bearing deposits		4,561,214								5,053,996
Interest payable and other liabilities		94,817								97,146
Stockholders’ equity		1,302,397								1,182,899
Total interest free funds		5,958,428								6,334,041
Total liabilities and stockholders’ equity	$	12,105,166							$	12,294,164
Net interest income				$	215,271							$	162,609
Net interest spread							2.69	%							2.80	%
Effect of interest free funds							1.19	%							0.12	%
Net interest margin							3.88	%							2.92	%

33

Selected income statement data and other selected data for the comparable periods were as follows:

BANCFIRST CORPORATION

SELECTED CONSOLIDATED FINANCIAL DATA

(Unaudited)

(Dollars in thousands, except per share data)

	Three Months Ended June 30,						Six Months Ended June 30,
	2023			2022			2023			2022
Income Statement Data
Net interest income	$	105,926		$	86,867		$	215,082		$	162,374
Provision for credit losses		2,824			501			5,146			3,437
Securities transactions		110			—			(103	)		(3,915	)
Total noninterest income		47,974			42,598			95,802			86,248
Salaries and employee benefits		49,803			45,284			99,055			89,216
Total noninterest expense		81,110			73,717			161,427			146,229
Net income		55,010			44,707			112,543			80,622
Per Common Share Data
Net income – basic	$	1.67		$	1.36		$	3.42		$	2.46
Net income – diluted		1.64			1.34			3.36			2.42
Cash dividends		0.40			0.36			0.80			0.72
Performance Data
Return on average assets		1.85	%		1.42	%		1.87	%		1.32	%
Return on average stockholders’ equity		16.59			15.14			17.43			13.74
Cash dividend payout ratio		23.95			26.47			23.39			29.27
Net interest spread		2.58			2.90			2.69			2.80
Net interest margin		3.87			3.05			3.88			2.92
Efficiency ratio		52.70			56.94			51.93			58.82
Net charge-offs to average loans		0.01			0.01			0.01			0.01

Net Interest Income

For the three months ended June 30, 2023, net interest income, which is the Company’s principal source of operating revenue, increased $19.1 million or 21.9% compared to the three months ended June 30, 2022. The increase was due to rising short-term interest rates and loan growth. Net interest margin is the ratio of taxable-equivalent net interest income to average earning assets for the period. As shown in the preceding table, the Company’s net interest margin for the second quarter of 2023 increased compared to the second quarter of 2022.

Net interest income for the six months ended June 30, 2023 increased $52.7 million or 32.5% compared to the six months ended June 30, 2022. Rising short term interest rates and loan growth contributed to the increase. As shown in the preceding table, the Company’s net interest margin for the six months ended June 30, 2023 increased compared to the six months ended June 30, 2022.

In March of 2022, the Federal Reserve began raising the federal funds rate in an effort to reduce inflation and slow the economy. The Company’s net interest income and net interest margin were impacted by the increases in interest rates.

Provision for Credit Losses

The provision for credit losses is presented in the preceding table. The increase in the provision for the three months ended June 30, 2023 compared to 2022 was driven by loan growth. The Company establishes an allowance as an estimate of the 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 expected credit losses could also change, which could affect the amount of future provisions for credit losses. Net loan charge-offs were $664,000 for the second quarter of 2023, compared to net loan charge-offs of $805,000 for the second quarter of 2022. The rate of net charge-offs to average loans, as presented in the preceding table, continues to be at a low level.

The increased provision for credit losses for the six months ended June 30, 2023 compared to the six months ended June 30, 2022 was due to loan growth. Net loan charge-offs were $954,000 for the six months ended June 30, 2023, compared to $516,000 for the same period of the prior year.

34

Noninterest Income

Noninterest income, as presented in the preceding table, grew by $5.4 million for the second quarter of 2023 compared to the second quarter of 2022. The growth in noninterest income was mostly attributable to an increase in sweep account fees due to increased sweep account balances. Noninterest income for the second quarter of 2022 included $578,000 of income from an equity interest received from a prior loan settlement. The equity interest was sold during the second quarter of 2023 at no gain.

Noninterest income included non-sufficient funds ("NSF") and overdraft fees totaling $6.6 million and $6.1 million for the three months ended June 30, 2023 and 2022, respectively. This represents 13.8% and 14.3% of the Company’s noninterest income for the respective periods. In addition, the Company had debit card interchange fees totaling $12.4 million and $12.5 million during the three months ended June 30, 2023 and 2022, respectively. This represents 25.9% and 29.3% of the Company’s noninterest income for the respective periods.

Noninterest income grew by $9.6 million for the six months ended June 30, 2023 compared to the six months ended June 30, 2022. The growth in noninterest income was mostly attributable to an increase in sweep account fees of $8.3 million due to increased sweep account balances, along with an increase in trust revenue and insurance commissions. In addition, the first six months of 2022 included 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. Noninterest income for the six months ended June 30, 2022 included $5.5 million of income from an equity interest received from a prior loan settlement compared to $327,000 for six months ended June 30, 2023. The equity interest was sold during the second quarter of 2023 at no gain. The Company earned $1.4 million on the sale of loans for the six months ended June 30, 2023 compared to $2.9 million for the six months ended June 30, 2022.

Noninterest income included non-sufficient fund fees totaling $13.1 million and $12.6 million during the six months ended June 30, 2023 and 2022, respectively. This represents 13.7% and 14.7% of the Company’s noninterest income for the respective periods. In addition, the Company had debit card interchange fees totaling $24.4 million and $24.1 million during the six months ended June 30, 2023 and 2022, respectively. This represents 25.5% and 28.0% of the Company’s noninterest income for the respective periods.

The Company is subject to political pressures that could limit our ability to charge for NSF and overdraft fees. As of April 1, 2022, the Company lowered the rates charged on NSF and overdraft fees. The Company exceeded $10 billion in total assets at December 31, 2022. Pursuant to the Durbin Amendment of the Dodd-Frank Act, based on current run rates, this will cause a reduction of annual pretax income from debit card interchange fees of approximately $23 million beginning July 1, 2023.

Noninterest Expense

Noninterest expense, as presented in the preceding table, increased by $7.4 million for second quarter of 2023 compared to the second quarter of 2022. Higher noninterest expenses in 2023 was primarily related to growth in salaries and employee benefits of $4.5 million. In addition, noninterest expense was lower in the second quarter of 2022 due to a gain from the sale of the Company’s prior headquarters that was carried in other real estate owned which reduced noninterest expense by $3.1 million.

For the six months ended June 30, 2023, noninterest expense increased by $15.2 million compared to the six months ended June 30, 2022. Higher noninterest expenses in 2023 was primarily related to growth in salaries and employee benefits of $9.8 million. In addition, noninterest expense was lower in the six months ended June 30, 2022 due to a gain from the sale of the Company’s prior headquarters that was carried in other real estate owned which reduced noninterest expense by $3.1 million.

Income Taxes

The Company’s effective tax rate was 21.4% for the second quarter of 2023, compared to 19.1% for the second quarter of 2022. The Company's adoption of ASU 2023-02 in the first quarter of 2023 increased income tax expense due to the amortization of $1.2 million of New Markets Tax Credits ("NMTC") to income tax expense during the period that would have previously been recorded to other expense, which increased the effective tax rate by 1.69%. The lower effective tax rate in 2022 was also driven by the exercising of stock options during the quarter.

The Company’s effective tax rate was 22.0% for the first six months of 2023, compared to 18.5% for the first six months of 2022. The Company's adoption of ASU 2023-02 in the first quarter of 2023 increased income tax expense due to the amortization of $2.2 million of NMTC to income tax expense during the period that would have previously been recorded to other expense, which increased the effective tax rate by 1.50%. Exercises of stock options contributed to the lower effective tax rate in 2022.

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.

35

FINANCIAL POSITION

BANCFIRST CORPORATION
SELECTED CONSOLIDATED FINANCIAL DATA
(Dollars in thousands, except per share data)
	June 30, 2023			December 31, 2022
	(unaudited)
Balance Sheet Data
Total assets	$	12,020,265		$	12,387,863
Total loans (net of unearned interest)		7,307,475			6,949,795
Allowance for credit losses		96,920			92,728
Debt securities		1,570,620			1,540,604
Deposits		10,475,180			10,974,228
Stockholders' equity		1,340,791			1,250,836
Book value per share		40.70			38.05
Tangible book value per share (non-GAAP)(1)		34.62			31.90
Reconciliation of Tangible Book Value per Common Share (non-GAAP)(2)
Stockholders' equity	$	1,340,791		$	1,250,836
Less goodwill		182,055			182,055
Less intangible assets, net		18,223			19,983
Tangible stockholders' equity (non-GAAP)	$	1,140,513		$	1,048,798
Common shares outstanding		32,939,256			32,875,560
Tangible book value per share (non-GAAP)	$	34.62		$	31.90
Selected Financial Ratios
Balance Sheet Ratios:
Average loans to deposits (year-to-date)		67.15	%		60.06	%
Average earning assets to total assets (year-to-date)		92.38			91.63
Average stockholders’ equity to average assets (year-to-date)		10.76			9.67
Asset Quality Data
Loans past due 90 days and still accruing	$	8,799		$	7,085
Nonaccrual loans (3)		18,047			15,299
Other real estate owned and repossessed assets		41,612			36,936
Asset Quality Ratios:
Nonaccrual loans to total loans		0.25	%		0.22	%
Allowance for credit losses to total loans		1.33			1.33
Allowance for credit losses to nonaccrual loans		537.05			606.10
(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.
(3) Government agencies guarantee approximately $6.6 million of nonaccrual loans at June 30, 2023.

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

The aggregate of cash and due from banks, federal funds sold and interest-bearing deposits with banks decreased by $758.1 million or 23.9% to $2.4 billion, from December 31, 2022 to June 30, 2023. The decrease was primarily due to the movement of demand deposits into the Company's off-balance sheet sweep account product and loan growth. Sweep accounts were $4.3 billion at June 30, 2023, up $567.7 million from December 31, 2022.

Securities

At June 30, 2023, total debt securities increased $30.0 million, or 1.9% compared to December 31, 2022. The size of the Company’s securities portfolio is determined by the Company’s liquidity and asset/liability management. The net unrealized loss on debt securities available for sale, before taxes, was $93.0 million at June 30, 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 income, net of income tax, in the amounts of a loss of $71.0 million at June 30, 2023 and a loss of $71.6 million at December 31, 2022.

36

During the six months ended June 30, 2023, the Company purchased debt securities as shown in the consolidated statements of cash flow. The Company did not have any sales of debt securities during the six months ended June 30, 2023. During the six months ended June 30, 2022, the Company had a loss of $4.0 million on bonds resulting from the sale of $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%. On January 10, 2022, the Company purchased United States Treasury Notes of $600 million par value with an average yield of 1.42% and an average maturity of 53 months.

See Note (3) of the Notes to Consolidated Financial Statements for disclosures regarding the Company’s Securities.

Loans

At June 30, 2023, total loans increased $357.7 million or 5.1% compared to December 31, 2022, as a result of internal loan growth. The increase of internal loan growth was 71% from the Company's Oklahoma subsidiary BancFirst and 29% from the Company's Texas subsidiaries Pegasus and Worthington.

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

Allowance for Credit Losses

The allowance for credit losses to total loans was 1.33% at both June 30, 2023 and December 31, 2022. The overall credit quality of the Company's loan portfolio has remained strong. 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.

Nonaccrual Loans

Nonaccrual loans totaled $18.0 million at June 30, 2023, compared to $15.3 million at December 31, 2022. The Company’s nonaccrual loans are primarily commercial real estate and 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 approximately $718,000 for the six months ended June 30, 2023 and $653,000 for the six months ended June 30, 2022. Only a small amount of this interest is expected to be ultimately collected. Approximately $6.6 million of nonaccrual loans were guaranteed by government agencies at June 30, 2023.

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 declines. 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. The allowance for credit losses as a percentage of nonaccrual loans is shown in the table above.

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 $9.7 million during the period ended June 30, 2023.

Other Real Estate Owned and Repossessed Assets

Other real estate owned (OREO) and repossessed assets totaled $41.6 million at June 30, 2023, compared to $36.9 million at December 31, 2022. The Company has spent $4.4 million on OREO tenant improvement during the six months ended June 30, 2023, which is the contributing factor to the increase. 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.

37

OREO included a commercial real estate property recorded at $32.9 million at June 30, 2023 and $29.4 million at 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.

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)
Rental income	$	2,778	$	2,643	$	5,468	$	5,313
Operating expense		2,967		2,299		5,348		4,738

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)
Rental income	$	2,895	$	2,794	$	5,716	$	5,602
Operating expense		3,058		2,559		5,614		5,079

Intangible Assets, Goodwill and Other Assets

Identifiable intangible assets and goodwill totaled $200.3 million and $202.0 million at June 30, 2023 and December 31, 2022, respectively.

Other assets includes the cash surrender value of key-man life insurance policies totaling $83.4 million at June 30, 2023 and $82.7 million at December 31, 2022.

Derivative financial instruments consisting of oil and gas swaps and option contracts are included in other assets and totaled $23.3 million at June 30, 2023 and $20.7 million at December 31, 2022. These derivative financial instruments have increased due to the increase in oil and gas prices and customer activity. They require a daily margin to be posted, which fluctuates with oil and gas prices and customer activity. At June 30, 2023, the Company had a margin liability included in other liabilities in the amount of $5.5 million. At December 31, 2022, the Company had a margin asset included in other assets in the amount of $6.6 million. See Note (11) of the Notes to Consolidated Financial Statements for a complete discussion of the Company’s derivative financial instruments.

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 $15.2 million at June 30, 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 included equity interests of previous borrowers in the oil and gas industry that were received through bankruptcy proceedings, which totaled $21.4 million at December 31, 2022. This equity interest was sold during the second quarter of 2023 resulting in a zero balance at June 30, 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

During 2023, there have not been any material changes in the Company’s low income housing tax credit ("LIHTC") investments and NMTC investments, which are included in other assets on the Company’s consolidated balance sheet. The Company adopted ASU 2023-02 on January 1, 2023 and as of June 30, 2023 have recorded $26.7 million in other assets and other liabilities on the consolidated balance sheet for unfunded LIHTC commitments and have amortized $2.2 million of NMTC investments to income tax expense for the six months ended June 30, 2023 that would have previously been recorded to other expense. See Note (6) of the Notes to Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, for disclosures regarding these investments.

38

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 20.1% at June, 30. 2023, compared to 25.6% at December 31, 2022, the Company is still highly liquid. The decrease was primarily due to the movement of demand deposits into the Company's off-balance sheet sweep account product and loan growth.

There have not been any other material changes from the liquidity and funding discussion included in Management’s Discussion and Analysis in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

Deposits

At June 30, 2023, deposits totaled $10.5 billion, a decrease of $499.0 million from December 31, 2022 as demand 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 were 97.6% at June 30, 2023 and 98.1% at December 31, 2022. Noninterest-bearing deposits to total deposits were 40.9% at June 30, 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.

Off-balance sheet sweep accounts totaled $4.3 billion at June 30, 2023 compared to $3.7 billion at December 31, 2022. The Company's sweep accounts affected the balances of both cash and deposits.

Subordinated Debt

See Note (6) of the Notes to Consolidated Financial Statements for a complete discussion of the Company’s subordinated debt.

Short-Term Borrowings and Lines of Credit

Short-term borrowings, consisting primarily of federal funds purchased and repurchase agreements, are another source of funds for the Company. The level of these borrowings is determined by various factors, including customer demand and the Company’s ability to earn a favorable spread on the funds obtained. Short-term borrowings were $3.9 million at June 30, 2023, compared to $300,000 at December 31, 2022. The Company has several lines of credit it can use. At June 30, 2023, BancFirst had $769.6 million available on its line of credit from the FHLB of Topeka, Kansas and a $25.0 million line of credit with another financial institution that is an overnight federal funds facility. Worthington has a $10.5 million line of credit with another financial institution that is an overnight federal funds facility, a federal reserve discount window capacity of $26.8 million and a $74.2 million line of credit from the FHLB of Dallas, Texas.

Capital Resources

Stockholders’ equity totaled $1.3 billion at June 30, 2023 an increase of $90.0 million from December 31, 2022. In addition to net income of $112.5 million, other changes in stockholders’ equity during the six months ended June 30, 2023 included $2.0 million related to common stock issuances for stock option exercises, $1.2 million related to stock-based compensation and a $558,000 increase in accumulated other comprehensive income that were partially offset by $26.3 million in dividends. The Company’s leverage ratio and total risk-based capital ratios at June 30, 2023, were well in excess of the regulatory requirements.

See Note (8) of the Notes to Consolidated Financial Statements for a discussion of capital ratios and requirements.

Liquidity Risk and Off-Balance Sheet Arrangements

Other than changes in the Company's liquidity elsewhere disclosed in this discussion, there have not been any material changes in the Company’s liquidity risk and off-balance sheet arrangements included in Management’s Discussion and Analysis which was included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

39

Item 3. Quantitative and Qualitative Disclosures About Market Risk.

There have been no significant changes in the Company’s disclosures regarding market risk since December 31, 2022, the date of its most recent annual report to stockholders.

Item 4. Controls and Procedures.

Evaluation of Disclosure 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 report, the Company’s disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act). Based on their evaluation they concluded that the disclosure controls and procedures of the Company are effective to ensure that information required to be disclosed by the Company in the reports filed or submitted by it under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported, within the time periods specified in the applicable rules and forms.

Changes in Internal Control Over Financial Reporting. During the period to which this report relates, there have not been any changes in the Company’s internal controls over financial reporting (as defined in Rule 13a-15(f) and 15d-15(f) under the Exchange Act) that have materially affected, or are reasonably likely to materially affect, such controls.

40

PART II – OTHER INFORMATION

Item 1. 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 1A. Risk Factors.

The following represents a material change in our risk factors from those disclosed in Part I – “Item 1A. Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

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

The recent bank failures and related negative media attention 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.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

None.

Item 3. Defaults Upon Senior Securities.

None.

Item 4. Mine Safety Disclosures.

None.

Item 5. Other Information.

None.

41

Item 6. Exhibits.

Exhibit Number	Exhibit
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).
10.1	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).
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 & CFO’s Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS*	Inline XBRL Instance Document - The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH*	Inline XBRL Taxonomy Extension Schema Document.
101.CAL*	Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF*	Inline XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB*	Inline XBRL Taxonomy Extension Label Linkbase Document.
101.PRE*	Inline XBRL Taxonomy Extension Presentation Linkbase Document.
104*	Cover page Interactive Data File (formatted as Inline XBRL and contained within the Inline XBRL Instance Document in Exhibit 101)

* Filed herewith.

** This exhibit is furnished herewith and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, and shall not be deemed to be incorporated by reference into any filing under the Securities Act or the Exchange Act.

42

SIGNATURES

Pursuant to the requirements 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.

	BANCFIRST CORPORATION
	(Registrant)
Date: August 4, 2023	/s/ David Harlow
	David Harlow
	President
	Chief Executive Officer
	(Principal Executive Officer)
Date: August 4, 2023	/s/ Kevin Lawrence
	Kevin Lawrence
	Executive Vice President
	Chief Financial Officer
	(Principal Financial Officer)

43

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 quarterly report on Form 10-Q of BancFirst Corporation;

2.Based on my knowledge, this quarterly 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 quarterly report;

3.Based on my knowledge, the financial statements, and other financial information included in this quarterly 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 quarterly 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 quarterly 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 quarterly report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this quarterly report based on such evaluation; and

d) Disclosed in this quarterly 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: August 4, 2023	/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 quarterly report on Form 10-Q of BancFirst Corporation;

2.Based on my knowledge, this quarterly 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 quarterly report;

3.Based on my knowledge, the financial statements, and other financial information included in this quarterly 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 quarterly 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 quarterly 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 quarterly report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this quarterly report based on such evaluation; and

d) Disclosed in this quarterly 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: August 4, 2023	/s/ Kevin Lawrence
	Kevin Lawrence
	Executive Vice President
	Chief Financial Officer
	(Principal Financial Officer)

EX-32

Exhibit 32

Certification of periodic report

pursuant to section 906 of the sarbanes-oxley act of 2002

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 Quarterly Report on Form 10-Q of the Company for the period ended June 30, 2023 (the “Form 10-Q”) fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

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

Dated: August 4, 2023

/s/ David Harlow

David Harlow

President and Chief Executive Officer

(Principal Executive Officer)

/s/ Kevin Lawrence

Kevin Lawrence

Executive Vice President

and Chief Financial Officer

(Principal Financial Officer)

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2023	Jul. 31, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
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
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
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	73102-8405
City Area Code	405
Local Phone Number	270-1086
Document Quarterly Report	true
Document Transition Report	false
Entity Common Stock, Shares Outstanding		32,941,756

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
ASSETS
Cash and due from banks	$ 221,138	$ 259,049
Interest-bearing deposits with banks	2,188,004	2,909,861
Federal funds sold	4,481	2,850
Debt securities held for investment (fair value: $1,193 and $2,383, respectively)	1,193	2,383
Debt securities available for sale at fair value	1,569,427	1,538,221
Loans held for sale	8,783	6,232
Loans held for investment (net of unearned interest)	7,298,692	6,943,563
Allowance for credit losses	(96,920)	(92,728)
Loans, net of allowance for credit losses	7,201,772	6,850,835
Premises and equipment, net	279,758	278,088
Other real estate owned	41,270	36,756
Intangible assets, net	18,223	19,983
Goodwill	182,055	182,055
Accrued interest receivable and other assets	304,161	301,550
Total assets	12,020,265	12,387,863
Deposits:
Noninterest-bearing	4,285,620	4,944,730
Interest-bearing	6,189,560	6,029,498
Total deposits	10,475,180	10,974,228
Short-term borrowings	3,893	300
Accrued interest payable and other liabilities	114,329	76,455
Subordinated debt	86,072	86,044
Total liabilities	10,679,474	11,137,027
Stockholders' equity:
Common stock, $1.00 par, 40,000,000 shares authorized; shares issued andoutstanding: 32,939,256 and 32,875,560, respectively	32,939	32,876
Capital surplus	172,358	169,231
Retained earnings	1,206,499	1,120,292
Accumulated other comprehensive loss, net of tax benefit of $21,953 and $22,107, respectively	(71,005)	(71,563)
Total stockholders' equity	1,340,791	1,250,836
Total liabilities and stockholders' equity	$ 12,020,265	$ 12,387,863

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Securities, fair value	$ 1,193	$ 2,383
Common stock, par value	$ 1.00	$ 1.00
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	32,939,256	32,875,560
Common stock, shares outstanding	32,939,256	32,875,560
Accumulated other comprehensive loss, net of tax benefit	$ 21,953	$ 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

XML

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
INTEREST INCOME
Loans, including fees	$ 114,612	$ 78,726	$ 219,008	$ 151,680
Debt securities:
Taxable	9,408	5,142	18,399	8,923
Tax-exempt	23	23	30	49
Federal funds sold	81	5	113	6
Interest-bearing deposits with banks	26,694	7,600	58,714	9,357
Total interest income	150,818	91,496	296,264	170,015
INTEREST EXPENSE
Deposits	43,732	3,586	78,909	5,567
Short-term borrowings	129	12	212	13
Subordinated debt	1,031	1,031	2,061	2,061
Total interest expense	44,892	4,629	81,182	7,641
Net interest income	105,926	86,867	215,082	162,374
Provision for credit losses	2,824	501	5,146	3,437
Net interest income after provision for credit losses	103,102	86,366	209,936	158,937
NONINTEREST INCOME
Securities transactions (includes accumulated other comprehensive loss reclassifications of $0 and $1,536, respectively)	110		(103)	(3,915)
Income from sales of loans	757	1,256	1,361	2,922
Insurance commissions	6,225	5,302	14,966	12,729
Cash management	7,927	4,447	14,661	7,578
Gain on sale of other assets	315	118	794	163
Other	5,782	5,908	11,812	16,323
Total noninterest income	47,974	42,598	95,802	86,248
NONINTEREST EXPENSE
Salaries and employee benefits	49,803	45,284	99,055	89,216
Occupancy, net	5,118	4,734	10,101	9,137
Depreciation	4,769	4,647	9,412	9,422
Amortization of intangible assets	880	857	1,760	1,688
Data processing services	2,217	1,975	4,324	3,780
Net expense from other real estate owned	2,889	(510)	5,348	1,284
Marketing and business promotion	1,900	1,591	4,427	3,664
Deposit insurance	1,463	1,196	3,076	2,324
Other	12,071	13,943	23,924	25,714
Total noninterest expense	81,110	73,717	161,427	146,229
Income before taxes	69,966	55,247	144,311	98,956
Income tax expense	14,956	10,540	31,768	18,334
Net income	$ 55,010	$ 44,707	$ 112,543	$ 80,622
NET INCOME PER COMMON SHARE
Basic	$ 1.67	$ 1.36	$ 3.42	$ 2.46
Diluted	$ 1.64	$ 1.34	$ 3.36	$ 2.42
OTHER COMPREHENSIVE (LOSS)/GAIN
Unrealized (loss)/income on debt securities, net of tax benefit/(expense) of $4,350, $5,240, $(154) and $15,459, respectively	$ (14,091)	$ (16,972)	$ 558	$ (49,805)
Reclassification adjustment for loss included in net income, net of tax expense of $0, $0, $0 and $369, respectively				1,167
Other comprehensive (loss)/income, net of tax benefit/(expense) of $4,350, $5,240, $(154) and $15,090, respectively	(14,091)	(16,972)	558	(48,638)
Comprehensive income	40,919	27,735	113,101	31,984
Trust Revenue [Member]
NONINTEREST INCOME
Revenue	4,590	3,949	8,812	7,455
Service Charges on Deposits [Member]
NONINTEREST INCOME
Revenue	$ 22,268	$ 21,618	$ 43,499	$ 42,993

XML

Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Securities transactions accumulated other comprehensive loss reclassifications	$ 0	$ 0	$ 0	$ 1,536
Unrealized losses on debt securities, tax	(4,350)	5,240	154	15,459
Reclassification adjustment for losses included in net income, tax	0	0	0	369
Other comprehensive loss, tax	$ (4,350)	$ 5,240	$ 154	$ 15,090

XML

Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	COMMON STOCK [Member]	CAPITAL SURPLUS [Member]	RETAINED EARNINGS [Member]	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Member]
Balance at beginning of period at Dec. 31, 2021		$ 32,603	$ 159,914	$ 977,067	$ 2,150
Shares issued for stock options		178	4,463
Net income	$ 80,622			80,622	(48,638)
Dividends on common stock				(23,582)
Stock-based compensation arrangements			918
Balance at end of period at Jun. 30, 2022	1,185,695	32,781	165,295	1,034,107	(46,488)
Balance at beginning of period at Mar. 31, 2022		32,726	163,392	1,001,200	(29,516)
Shares issued for stock options		55	1,443
Net income	44,707			44,707
Dividends on common stock				(11,800)
Stock-based compensation arrangements			460
Net change					(16,972)
Balance at end of period at Jun. 30, 2022	1,185,695	32,781	165,295	1,034,107	(46,488)
Balance at beginning of period at Dec. 31, 2022	1,250,836	32,876	169,231	1,120,292	(71,563)
Shares issued for stock options		63	1,914
Net income	112,543			112,543
Dividends on common stock				(26,336)
Stock-based compensation arrangements			1,213
Net change					558
Balance at end of period at Jun. 30, 2023	1,340,791	32,939	172,358	1,206,499	(71,005)
Balance at beginning of period at Mar. 31, 2023		32,900	170,231	1,164,665	(56,914)
Shares issued for stock options		39	1,296
Net income	55,010			55,010
Dividends on common stock				(13,176)
Stock-based compensation arrangements			831
Net change					(14,091)
Balance at end of period at Jun. 30, 2023	$ 1,340,791	$ 32,939	$ 172,358	$ 1,206,499	$ (71,005)

XML

Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
RETAINED EARNINGS [Member]
Dividend on common stock	$ 0.40	$ 0.36	$ 0.80	$ 0.72

XML

Consolidated Statements of Cash Flow (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 112,543,000	$ 80,622,000
Adjustments to reconcile to net cash provided by operating activities:
Provision for credit losses	5,146,000	3,437,000
Depreciation and amortization	11,172,000	11,110,000
Net amortization of securities premiums and discounts	(577,000)	2,773,000
Realized securities losses	103,000	3,915,000
Gain on sales of loans	(1,361,000)	(2,922,000)
Cash receipts from the sale of loans originated for sale	77,758,000	155,075,000
Cash disbursements for loans originated for sale	(78,948,000)	(134,737,000)
Deferred income tax benefit	(1,489,000)	(1,806,000)
Gain on sale of other assets	(1,061,000)	(3,996,000)
Increase in interest receivable	(3,387,000)	(5,065,000)
Increase in interest payable	3,005,000	160,000
Amortization of stock-based compensation arrangements	1,213,000	918,000
Excess tax benefit from stock-based compensation arrangements	(734,000)	(1,771,000)
Other, net	5,797,000	12,127,000
Net cash provided by operating activities	129,180,000	119,840,000
INVESTING ACTIVITIES
Net cash received from acquisitions, net of cash paid		121,099,000
Net (increase)/decrease in federal funds sold	(1,631,000)	1,888,000
Purchases of available for sale debt securities	(94,112,000)	(1,009,340,000)
Proceeds from maturities, calls and paydowns of held for investment debt securities	1,349,000	66,000
Proceeds from maturities, calls and paydowns of available for sale debt securities	64,036,000	44,915,000
Proceeds from sales of available for sale securities	0	222,473,000
Purchase of equity securities	(294,000)	(208,000)
Proceeds from paydowns and sales of equity securities	531,000	699,000
Net change in loans	(357,140,000)	(190,135,000)
Net receipts/(payments) on derivative asset contracts	11,628,000	(84,932,000)
Purchases of premises, equipment and computer software	(13,016,000)	(11,869,000)
Purchase of tax credits	(3,813,000)	(3,676,000)
Other, net	23,302,000	10,519,000
Net cash used in investing activities	(369,160,000)	(898,501,000)
FINANCING ACTIVITIES
Net change in deposits	(499,048,000)	2,620,757,000
Net change in short-term borrowings	3,593,000	6,100,000
Issuance of common stock in connection with stock options, net	1,977,000	4,641,000
Cash dividends paid	(26,310,000)	(23,518,000)
Net cash used in financing activities	(519,788,000)	2,607,980,000
Net (decrease)/increase in cash, due from banks and interest-bearing deposits	(759,768,000)	1,829,319,000
Cash, due from banks and interest-bearing deposits at the beginning of the period	3,168,910,000	2,050,022,000
Cash, due from banks and interest-bearing deposits at the end of the period	2,409,142,000	3,879,341,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid during the period for interest	78,176,000	7,456,000
Cash paid during the period for income taxes	31,180,000	14,080,000
Noncash investing and financing activities:
Cash consideration for acquisitions		77,685,000
Fair value of assets acquired in acquisitions		511,466,000
Liabilities assumed in acquisitions		433,782,000
Unpaid common stock dividends declared	$ 13,176,000	$ 11,801,000

XML

Description of Business and Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 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 significant accounting policies can be found in Note (1) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

Basis of Presentation

The accompanying unaudited interim consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., Pegasus Bank ("Pegasus"), Worthington Bank ("Worthington") and BancFirst and its subsidiaries ("BancFirst"). The principal operating subsidiaries of BancFirst are BFTower, LLC, BFC-PNC 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 unaudited interim consolidated financial statements.

The accompanying unaudited interim consolidated financial statements and notes are presented in accordance with U.S. GAAP for interim financial information and the instructions for Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). The information contained in the consolidated financial statements and footnotes included in BancFirst Corporation’s Annual Report on Form 10-K for the year ended December 31, 2022, should be referred to in connection with these unaudited interim consolidated financial statements. Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period.

The unaudited interim consolidated financial statements contained herein reflect all adjustments, which are, in the opinion of management, necessary to provide a fair statement of the financial position and results of operations of the Company for the interim periods presented. All such adjustments are of a normal and recurring nature.

Reclassifications

Certain loan segments from 2022 have been reclassified to conform to the 2023 presentation. Such reclassifications had no effect on previously reported balance sheets, cash flows, stockholders’ equity or comprehensive income.

Use of Estimates in the Preparation of 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 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.

Recent Accounting Pronouncements

Standards Adopted During the Current Period:

In March 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 January 1, 2023. ASU No. 2022-02 did not have a significant impact on the Company’s consolidated financial statements.

In March 2023, the 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") and Low-Income Housing Tax Credits ("LIHTC") that will be affected by ASU 2023-02. Upon adoption of ASU No. 2023-02, the Company recorded $21.8 million in other assets and other liabilities on the consolidated balance sheet for unfunded LIHTC commitments and amortized $977,000 of NMTC 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.

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Recent Developments, Including Mergers and Acquisitions

6 Months Ended

Jun. 30, 2023

Recent Developments Including Mergers And Acquisitions [Abstract]

Recent Developments, Including Mergers and Acquisitions

(2) RECENT DEVELOPMENTS, INCLUDING MERGERS AND ACQUISITIONS

On July 28, 2023, the Company's wholly-owned subsidiary BancFirst applied to become a Federal Reserve System member bank, which would change its primary regulator from the Federal Deposit Insurance Corporation (“FDIC”) to the Federal Reserve System. The Company expects its other wholly-owned subsidiaries Pegasus and Worthington will also apply for Federal Reserve System membership. The BancFirst application is pending approval from the Federal Reserve System.

On February 8, 2022, the Company acquired Worthington for an aggregate cash purchase price of $77.7 million. Worthington is 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. At acquisition, 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 complements the Company by expanding its Texas presence in the Dallas-Fort Worth market.

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Securities

6 Months Ended

Jun. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Securities

(3) 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
June 30, 2023	(Dollars in thousands)
Mortgage backed securities (1)	$	8	$	—	$	—	$	8
States and political subdivisions		685		—		—		685
Other securities		500		—		—		500
Total	$	1,193	$	—	$	—	$	1,193
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
June 30, 2023	(Dollars in thousands)
U.S. treasuries	$	1,599,593	$	—	$	(89,527	)	$	1,510,066
U.S. federal agencies		13,368		170		(2	)		13,536
Mortgage backed securities (1)		17,479		10		(1,869	)		15,620
States and political subdivisions		10,998		21		(133	)		10,886
Asset backed securities		12,784		—		(349	)		12,435
Other securities		8,163		—		(1,279	)		6,884
Total	$	1,662,385	$	201	$	(93,159	)	$	1,569,427
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.

On January 10, 2022, the Company purchased United States Treasury Notes of $600 million par value with an average yield of 1.42% and an average maturity of 53 months.

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.

	June 30, 2023				December 31, 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		842		842		1,195		1,195
After five years but within ten years		1		1		2		2
After ten years		—		—		—		—
Total	$	1,193	$	1,193	$	2,383	$	2,383
Available for Sale
Contractual maturity of debt securities:
Within one year	$	150,837	$	147,496	$	101,607	$	100,655
After one year but within five years		1,269,157		1,187,686		1,316,874		1,233,725
After five years but within ten years		202,889		196,755		170,513		163,101
After ten years		39,502		37,490		42,897		40,740
Total debt securities	$	1,662,385	$	1,569,427	$	1,631,891	$	1,538,221

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

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Book value of pledged securities	$	593,260	$	573,952

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

	For the Six Months Ended June 30,
	2023		2022
	(Dollars in thousands)
Proceeds	$	—	$	222,473
Gross losses realized		—		3,990

There were no sales of debt securities and therefore no proceeds from sales or realized securities gains or losses on available for sale debt securities for the six months ended June 30, 2023. During the six months ended June 30, 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.

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

The following table summarizes debt securities with unrealized losses, segregated by the duration of the unrealized loss, at June 30, 2023 and December 31, 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)
June 30, 2023
Available for Sale
U.S. treasuries		73	$	414,002	$	13,360	$	1,096,064	$	76,167	$	1,510,066	$	89,527
U.S. federal agencies		3		1,305		2		—		—		1,305		2
Mortgage backed securities		91		1,452		5		13,899		1,864		15,351		1,869
States and political subdivisions		10		2,029		22		1,251		111		3,280		133
Asset backed securities		1		—		—		12,435		349		12,435		349
Other securities		3		4,476		687		2,408		592		6,884		1,279
Total		181	$	423,264	$	14,076	$	1,126,057	$	79,083	$	1,549,321	$	93,159
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 June 30, 2023 and December 31, 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 statement of comprehensive income.

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Loans Held for Investment and Allowance for Credit Losses on Loans

6 Months Ended

Jun. 30, 2023

Receivables [Abstract]

Loans Held for Investment and Allowance for Credit Losses on Loans

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

Certain loan segments from 2022 have been reclassified to conform to the 2023 presentation. Each loan segment is made up 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.

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

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied		969,914		908,494
Commercial real estate non-owner occupied		1,412,476		1,383,150
Construction and development < 60 months		549,068		475,236
Construction residential real estate < 60 months		276,726		303,305
Residential real estate first lien		1,189,944		1,117,899
Residential real estate all other		219,752		196,198
Agriculture		422,327		408,037
Commercial non-real estate		1,349,789		1,241,454
Consumer non-real estate		457,897		446,756
Oil and gas		450,799		463,034
Total (1)	$	7,298,692	$	6,943,563
(1) Excludes accrued interest receivable of $34.3 million at June 30, 2023 and $30.6 million at December 31, 2022, that is recorded in accrued interest receivable and other assets.

The Company's loans are currently 85% held by BancFirst and 15% 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 Company's portfolio segment descriptions and the weighted average remaining life of portfolio segments are disclosed in Note (5) to the Company's Annual Report on Form 10-K for the year ended December 31, 2022.

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:

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Other real estate owned and repossessed assets	$	41,612	$	36,936

As of both June 30, 2023 and December 31, 2022, other real estate owned included a commercial real estate property recorded at approximately $32.9 million and $29.4 million, respectively. 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.

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)
Rental income	$	2,778	$	2,643	$	5,468	$	5,313
Operating expense		2,967		2,299		5,348		4,738

During the six months ended June 30, 2023, the Company sold property held in other real estate owned for a total gain of $266,000, compared to a total gain of $3.8 million in the six months ended June 30, 2022.

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 $9.7 million during the period ended June 30, 2023.

Nonaccrual loans

The Company did not recognize any interest income on nonaccrual loans for either of the six months ended June 30, 2023 or 2022. In addition, there were no nonaccrual loans for which there is no related allowance for credit losses at both June 30, 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 approximately $718,000 for the six months ended June 30, 2023 and approximately $653,000 for the six months ended June 30, 2022.

Nonaccrual loans guaranteed by government agencies totaled approximately $6.6 million at June 30, 2023 and approximately $4.7 million at December 31, 2022.

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

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	4,360	$	1,795
Commercial real estate non-owner occupied		706		667
Construction and development < 60 months		81		93
Construction residential real estate < 60 months		376		430
Residential real estate first lien		2,717		1,947
Residential real estate all other		845		55
Agriculture		2,141		2,734
Commercial non-real estate		6,497		7,066
Consumer non-real estate		241		192
Oil and gas		83		320
Total	$	18,047	$	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
(Dollars in thousands)	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
As of June 30, 2023
Real estate:
Commercial real estate owner occupied	$	2,439	$	1,684	$	6,844	$	10,967	$	958,947	$	969,914	$	4,152
Commercial real estate non-owner occupied		236		8,752		875		9,863		1,402,613		1,412,476		213
Construction and development < 60 months		52		—		984		1,036		548,032		549,068		903
Construction residential real estate < 60 months		1,342		103		543		1,988		274,738		276,726		543
Residential real estate first lien		2,597		1,328		2,534		6,459		1,183,485		1,189,944		879
Residential real estate all other		1,092		280		840		2,212		217,540		219,752		61
Agriculture		833		268		838		1,939		420,388		422,327		50
Commercial non-real estate		3,795		928		6,055		10,778		1,339,011		1,349,789		1,567
Consumer non-real estate		2,405		807		569		3,781		454,116		457,897		431
Oil and gas		236		654		83		973		449,826		450,799		—
Total	$	15,027	$	14,804	$	20,165	$	49,996	$	7,248,696	$	7,298,692	$	8,799
	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
As of 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 and the table summarizing the Company’s gross loans held for investment by year of origination and internally assigned credit grades as of December 31, 2022, are disclosed in Note (5) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

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

The following table 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
(Dollars in thousands)	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
As of June 30, 2023
Commercial real estate owner occupied
Grade 1	$	75,514	$	174,029	$	131,583	$	96,065	$	91,649	$	150,940	$	51,100	$	770,880
Grade 2		22,851		42,130		30,830		24,524		19,136		30,000		18,248		187,719
Grade 3		19		—		4,450		1,193		883		1,459		212		8,216
Grade 4		—		314		345		311		1,166		624		—		2,760
Grade 5		—		—		—		—		339		—		—		339
Total commercial real estate owner occupied		98,384		216,473		167,208		122,093		113,173		183,023		69,560		969,914
Commercial real estate non-owner occupied
Grade 1	$	116,433	$	324,990	$	221,196	$	159,511	$	92,137	$	79,849	$	45,799	$	1,039,915
Grade 2		44,955		107,929		43,476		33,416		32,628		71,739		23,609		357,752
Grade 3		—		6,733		5		150		6,207		795		—		13,890
Grade 4		44		820		—		—		—		55		—		919
Total commercial real estate non-owner occupied		161,432		440,472		264,677		193,077		130,972		152,438		69,408		1,412,476
Construction and development < 60 months
Grade 1	$	88,593	$	139,210	$	77,235	$	14,074	$	4,622	$	6,522	$	70,118	$	400,374
Grade 2		42,927		36,862		15,894		1,584		13,984		2,418		33,679		147,348
Grade 3		—		903		103		98		—		7		154		1,265
Grade 4		—		81		—		—		—		—		—		81
Total construction and development < 60 months		131,520		177,056		93,232		15,756		18,606		8,947		103,951		549,068
Construction residential real estate < 60 months
Grade 1	$	106,520	$	80,355	$	1,897	$	257	$	6	$	39	$	33,846	$	222,920
Grade 2		25,787		26,221		38		22		—		388		90		52,546
Grade 3		99		785		—		—		—		—		—		884
Grade 4		376		—		—		—		—		—		—		376
Total construction residential real estate < 60 months		132,782		107,361		1,935		279		6		427		33,936		276,726
Residential real estate first lien
Grade 1	$	160,801	$	256,377	$	189,258	$	130,017	$	78,783	$	168,639	$	3,721	$	987,596
Grade 2		21,024		46,624		35,716		24,654		12,691		44,160		—		184,869
Grade 3		1,236		1,867		2,959		1,035		1,664		3,926		—		12,687
Grade 4		361		177		1,181		292		646		2,135		—		4,792
Total residential real estate first lien		183,422		305,045		229,114		155,998		93,784		218,860		3,721		1,189,944
Residential real estate all other
Grade 1	$	25,642	$	28,209	$	8,615	$	9,218	$	4,625	$	14,003	$	39,561	$	129,873
Grade 2		2,380		4,982		2,202		1,983		1,509		3,476		69,231		85,763
Grade 3		171		422		77		45		146		471		1,877		3,209
Grade 4		—		24		10		26		—		50		797		907
Total residential real estate all other		28,193		33,637		10,904		11,272		6,280		18,000		111,466		219,752
Agriculture
Grade 1	$	32,122	$	61,718	$	39,267	$	32,007	$	18,986	$	36,796	$	39,208	$	260,104
Grade 2		18,303		23,027		19,601		8,718		9,835		17,869		43,466		140,819
Grade 3		6,781		1,204		1,527		3,396		144		3,815		3,255		20,122
Grade 4		59		668		57		169		44		254		31		1,282
Total Agriculture		57,265		86,617		60,452		44,290		29,009		58,734		85,960		422,327
Commercial non-real estate
Grade 1	$	148,198	$	288,490	$	176,959	$	48,809	$	42,278	$	43,672	$	293,889	$	1,042,295
Grade 2		55,938		65,449		28,746		16,090		10,820		21,080		96,657		294,780
Grade 3		1,208		2,284		575		172		619		1,381		2,491		8,730
Grade 4		11		983		348		693		372		279		1,034		3,720
Grade 5		—		—		—		—		264		—		—		264
Total commercial non-real estate		205,355		357,206		206,628		65,764		54,353		66,412		394,071		1,349,789
Consumer non-real estate
Grade 1	$	118,847	$	146,280	$	76,246	$	27,782	$	13,664	$	4,737	$	26,330	$	413,886
Grade 2		7,960		16,721		8,236		2,766		971		1,804		1,642		40,100
Grade 3		155		984		1,013		401		245		115		16		2,929
Grade 4		39		392		352		44		85		25		4		941
Grade 5		—		41		—		—		—		—		—		41
Total consumer non-real estate		127,001		164,418		85,847		30,993		14,965		6,681		27,992		457,897
Oil and gas
Grade 1	$	62,557	$	13,971	$	96,748	$	12,909	$	2,273	$	17,373	$	159,813	$	365,644
Grade 2		6,779		5,334		2,251		432		18,470		255		47,498		81,019
Grade 3		—		2,091		240		3		—		—		1,719		4,053
Grade 4		—		83		—		—		—		—		—		83
Total oil and gas		69,336		21,479		99,239		13,344		20,743		17,628		209,030		450,799
Total loans held for investment	$	1,194,690	$	1,909,764	$	1,219,236	$	652,866	$	481,891	$	731,150	$	1,109,095	$	7,298,692

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
(Dollars in thousands)	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
Three months ended June 30, 2023
Commercial real estate owner occupied
Current-period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate non-owner occupied
Current-period gross charge-offs		—		—		—		—		—		—		—		—
Construction and development < 60 months
Current-period gross charge-offs		—		—		—		2		—		—		—		2
Construction residential real estate < 60 months
Current-period gross charge-offs		—		—		—		—		—		—		—		—
Residential real estate first lien
Current-period gross charge-offs		—		—		19		21		—		2		—		42
Residential real estate all other
Current-period gross charge-offs		—		2		—		—		—		—		—		2
Agriculture
Current-period gross charge-offs		—		—		—		301		1		—		—		302
Commercial non-real estate
Current-period gross charge-offs		42		34		1		20		—		5		—		102
Consumer non-real estate
Current-period gross charge-offs		29		186		115		14		28		11		15		398
Oil and gas
Current-period gross charge-offs		—		2		—		—		—		—		—		2
Total current-period gross charge-offs	$	71	$	224	$	135	$	358	$	29	$	18	$	15	$	850

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
(Dollars in thousands)	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
Six months ended June 30, 2023
Commercial real estate owner occupied
Current-period gross charge-offs	$	—	$	7	$	1	$	22	$	18	$	—	$	—	$	48
Commercial real estate non-owner occupied
Current-period gross charge-offs		—		—		—		—		—		3		—		3
Construction and development < 60 months
Current-period gross charge-offs		—		2		—		2		—		—		—		4
Construction residential real estate < 60 months
Current-period gross charge-offs		—		—		—		—		—		—		—		—
Residential real estate first lien
Current-period gross charge-offs		—		—		19		21		—		4		—		44
Residential real estate all other
Current-period gross charge-offs		—		4		19		—		1		4		—		28
Agriculture
Current-period gross charge-offs		—		4		—		317		14		2		—		337
Commercial non-real estate
Current-period gross charge-offs		42		101		63		20		—		52		—		278
Consumer non-real estate
Current-period gross charge-offs		29		262		147		29		37		17		17		538
Oil and gas
Current-period gross charge-offs		—		2		—		—		—		—		—		2
Total current-period gross charge-offs	$	71	$	382	$	249	$	411	$	70	$	82	$	17	$	1,282

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 CECL model. The allowance for credit losses is measured on a collective (pool) basis when similar risk characteristics exist.

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)
Three Months Ended June 30, 2023
Real estate:
Commercial real estate owner occupied	$	6,547	$	—		$	3	$	3		$	258		$	6,808
Commercial real estate non-owner occupied		32,120		—			—		—			1,312			33,432
Construction and development < 60 months		3,608		(2	)		3		1			(169	)		3,440
Construction residential real estate < 60 months		3,226		—			—		—			327			3,553
Residential real estate first lien		4,454		(42	)		10		(32	)		333			4,755
Residential real estate all other		1,444		(2	)		1		(1	)		218			1,661
Agriculture		6,268		(302	)		7		(295	)		453			6,426
Commercial non-real estate		25,079		(102	)		127		25			23			25,127
Consumer non-real estate		4,232		(398	)		35		(363	)		475			4,344
Oil and gas		7,782		(2	)		—		(2	)		(406	)		7,374
Total	$	94,760	$	(850	)	$	186	$	(664	)	$	2,824		$	96,920

	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)
Six Months Ended June 30, 2023
Real estate:
Commercial real estate owner occupied	$	6,416	$	(48	)	$	52	$	4		$	388		$	6,808
Commercial real estate non-owner occupied		30,190		(3	)		—		(3	)		3,245			33,432
Construction and development < 60 months		3,778		(4	)		6		2			(340	)		3,440
Construction residential real estate < 60 months		3,275		—			—		—			278			3,553
Residential real estate first lien		4,092		(44	)		13		(31	)		694			4,755
Residential real estate all other		1,418		(28	)		3		(25	)		268			1,661
Agriculture		6,217		(337	)		13		(324	)		533			6,426
Commercial non-real estate		25,106		(278	)		149		(129	)		150			25,127
Consumer non-real estate		4,132		(538	)		92		(446	)		658			4,344
Oil and gas		8,104		(2	)		—		(2	)		(728	)		7,374
Total	$	92,728	$	(1,282	)	$	328	$	(954	)	$	5,146		$	96,920

	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)
Three Months Ended June 30, 2022
Real estate:
Commercial real estate owner occupied	$	8,262	$	(4	)	$	30	$	26		$	(1,360	)	$	6,928
Commercial real estate non-owner occupied		16,348		—			—		—			(33	)		16,315
Construction and development < 60 months		3,272		—			2		2			406			3,680
Construction residential real estate < 60 months		1,103		—			—		—			80			1,183
Residential real estate first lien		3,394		(5	)		6		1			(40	)		3,355
Residential real estate all other		1,560		(36	)		—		(36	)		(44	)		1,480
Agriculture		8,018		—			4		4			(66	)		7,956
Commercial non-real estate		25,163		(717	)		26		(691	)		898			25,370
Consumer non-real estate		3,730		(153	)		42		(111	)		431			4,050
Oil and gas		16,389		—			—		—			229			16,618
Total	$	87,239	$	(915	)	$	110	$	(805	)	$	501		$	86,935

	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)
Six Months Ended June 30, 2022
Real estate:
Commercial real estate owner occupied	$	7,550	$	—	$	(20	)	$	78	$	58		$	(680	)	$	6,928
Commercial real estate non-owner occupied		16,807		—		—			—		—			(492	)		16,315
Construction and development < 60 months		3,454		—		—			5		5			221			3,680
Construction residential real estate < 60 months		1,051		—		—			—		—			132			1,183
Residential real estate first lien		3,048		2		(49	)		13		(36	)		341			3,355
Residential real estate all other		1,567		—		(36	)		402		366			(453	)		1,480
Agriculture		8,392		—		(125	)		7		(118	)		(318	)		7,956
Commercial non-real estate		25,565		48		(774	)		136		(638	)		395			25,370
Consumer non-real estate		3,694		28		(233	)		80		(153	)		481			4,050
Oil and gas		12,808		—		—			—		—			3,810			16,618
Total	$	83,936	$	78	$	(1,237	)	$	721	$	(516	)	$	3,437		$	86,935

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 six month period ended June 30, 2023. The credit-deteriorated loans purchased during the six months ended June 30, 2022 were as follows:

	Loans acquired with deteriorated credit quality
	(Dollars in thousands)
For the period ended June 30, 2022
Purchase price of loans at acquisition	$	661
Allowance for credit losses at acquisition		78
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 six months ended June 30, 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
	(Dollars in thousands)
As of June 30, 2023
Real estate:
Commercial real estate owner occupied	$	2,129	$	—	$	—	$	—	$	2,129	$	863
Commercial real estate non-owner occupied		664		—		—		—		664		270
Construction and development < 60 months		—		—		—		—		—		—
Construction residential real estate < 60 months		376		—		—		—		376		45
Residential real estate first lien		371		—		—		—		371		118
Residential real estate all other		41		—		—		—		41		19
Agriculture		3,436		672		—		3,068		7,176		2,694
Commercial non-real estate		—		4,879		—		—		4,879		1,747
Consumer non-real estate		—		—		—		93		93		56
Oil and gas		—		—		—		—		—		—
Total collateral-dependent loans held for investment	$	7,017	$	5,551	$	—	$	3,161	$	15,729	$	5,812
	Collateral Type
	Real Estate		Business Assets		Energy Reserves		Other Assets		Total		Specific Allocation
	(Dollars in thousands)
As of December 31, 2022
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 and repossessed 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 and repossessed assets during the periods presented are summarized as follows:

	Six Months Ended June 30,
	2023		2022
	(Dollars in thousands)
Other real estate owned	$	667	$	4,065
Repossessed assets		946		503
Total	$	1,613	$	4,568

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Intangible Assets and Goodwill

6 Months Ended

Jun. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets and Goodwill

(5) INTANGIBLE ASSETS AND GOODWILL

The following is a summary of intangible assets as of the date listed:

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Dollars in thousands)
June 30, 2023
Core deposit intangibles	$	33,298	$	(15,316	)	$	17,982
Customer relationship intangibles		3,350		(3,109	)		241
Total	$	36,648	$	(18,425	)	$	18,223
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

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)
Six months ended June 30, 2023
Balance at beginning and end of period	$	13,767	$	61,212	$	68,855	$	32,133	$	5,464	$	624	$	182,055

Additional information for intangible assets can be found in Note (7) to the Company’s Annual Report on Form 10-K for the year ended December 31, 2022.

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Subordinated Debt

6 Months Ended

Jun. 30, 2023

Broker-Dealer [Abstract]

Subordinated Debt

(6) 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 were callable at par, in whole or in part, after 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 approximately $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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Stock-Based Compensation

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

(7) STOCK-BASED COMPENSATION

The Company had a nonqualified incentive stock option plan, 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.

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 shall 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 June 30, 2023 there were 497,375 shares available for future grants. The restricted stock units ("RSU") vest beginning two years from the date of grant at the rate of 20% per year for five years. The fair value of each RSU granted is equal to the market price of the Company’s stock at date of grant.

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. The Company had no cash settlements during the six months ended June 30, 2023 or June 30, 2022.

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)
Six Months Ended June 30, 2023
Outstanding at December 31, 2022		1,310,290		$	52.51
Exercised		(45,899	)		33.54
Canceled, forfeited, or expired		(8,500	)		87.97
Outstanding at June 30, 2023		1,255,891			52.96	10.18 Yrs.	$	49,029
Exercisable at June 30, 2023		477,266			31.74	6.41 Yrs.	$	28,760

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)				(Dollars in thousands)
Total intrinsic value of options exercised	$	1,979	$	2,979	$	2,331	$	8,943
Cash received from options exercised		1,318		1,303		1,539		4,292
Tax benefit realized from options exercised		475		716		560		2,150

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 six months ended June 30, 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:

	Six Months Ended June 30,
	2023		2022
Weighted average grant-date fair value per share of options granted	$	—	$	29.08
Risk-free interest rate		—	1.75 to 3.25%
Dividend yield		—	2.00%
Stock price volatility		—	34.61 to 34.71%
Expected term		—	10 Yrs

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

			Wgtd. Avg.
	Restricted		Grant Date
	Stock Units		Fair Value
Six Months Ended June 30, 2023
Nonvested at December 31, 2022		—
Granted		2,625	$	93.66
Nonvested at June 30, 2023		2,625

The Company has had the BancFirst Corporation Directors’ Deferred Stock Compensation Plan (the “Deferred Stock Compensation Plan”) since May 1999. As of June 30, 2023, there are 22,252 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 17,797 and 13,288 shares of common stock distributed from the Deferred Stock Compensation Plan during the six months ended June 30, 2023 and 2022, respectively.

A summary of the accumulated stock units is as follows:

	June 30,		December 31,
	2023		2022
Accumulated stock units		115,848		129,609
Average price	$	38.26	$	34.91

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:

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)				(Dollars in thousands)
Stock-based compensation expense	$	831	$	460	$	1,213	$	918
Tax benefit		200		111		292		221
Stock-based compensation expense, net of tax	$	631	$	349	$	921	$	697

The Company will continue to amortize the unearned stock-based compensation expense over the remaining vesting period of approximately seven years. The following table shows the unearned stock-based compensation expense:

	June 30, 2023
	(Dollars in thousands)
Unearned stock-based compensation expense	$	11,867

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Stockholders' Equity

6 Months Ended

Jun. 30, 2023

Equity [Abstract]

Stockholders' Equity

(8) STOCKHOLDERS’ EQUITY

In November 1999, the Company adopted 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 under the program:

	June 30, 2023
Shares remaining to be repurchased		500,486

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 June 30, 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:

				Required						To Be Well
				For Capital			With			Capitalized Under
				Adequacy			Capital Conservation			Prompt Corrective
	Actual			Purposes			Buffer			Action Provisions
	Amount		Ratio	Amount		Ratio	Amount		Ratio	Amount		Ratio
	(Dollars in thousands)
As of June 30, 2023:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,393,706	16.81%	$	663,195	8.00%	$	870,444	10.50%	N/A		N/A
BancFirst		1,160,255	16.23%		571,919	8.00%		750,644	10.50%	$	714,899	10.00%
Pegasus		138,455	17.62%		62,861	8.00%		82,505	10.50%		78,576	10.00%
Worthington		49,963	13.30%		30,055	8.00%		39,447	10.50%		37,568	10.00%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,211,518	14.61%	$	373,047	4.50%	$	580,296	7.00%	N/A		N/A
BancFirst		1,054,783	14.75%		321,705	4.50%		500,429	7.00%	$	464,684	6.50%
Pegasus		130,150	16.56%		35,359	4.50%		55,003	7.00%		51,074	6.50%
Worthington		46,200	12.30%		16,906	4.50%		26,698	7.00%		24,419	6.50%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,237,518	14.93%	$	497,396	6.00%	$	704,645	8.50%	N/A		N/A
BancFirst		1,074,783	15.03%		428,940	6.00%		607,664	8.50%	$	571,919	8.00%
Pegasus		130,150	16.56%		47,145	6.00%		66,789	8.50%		62,861	8.00%
Worthington		46,200	12.30%		22,541	6.00%		31,933	8.50%		30,055	8.00%
Tier 1 Capital
(to Quarterly Average Assets)-
BancFirst Corporation	$	1,237,518	10.50%	$	471,255	4.00%	N/A		N/A	N/A		N/A
BancFirst		1,074,783	10.63%		401,047	4.00%	N/A		N/A	$	501,309	5.00%
Pegasus		130,150	10.41%		50,026	4.00%	N/A		N/A		62,532	5.00%
Worthington		46,200	9.18%		20,136	4.00%	N/A		N/A		25,171	5.00%

As of June 30, 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

6 Months Ended

Jun. 30, 2023

Earnings Per Share [Abstract]

Net Income Per Common Share

(9) NET INCOME PER COMMON SHARE

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

	Income (Numerator)		Shares (Denominator)		Per Share Amount
	(Dollars in thousands, except per share data)
Three Months Ended June 30, 2023
Basic
Income available to common stockholders	$	55,010		32,920,497	$	1.67
Dilutive effect of stock options		—		546,757
Diluted
Income available to common stockholders plus assumed exercises of stock options	$	55,010		33,467,254	$	1.64
Three Months Ended June 30, 2022
Basic
Income available to common stockholders	$	44,707		32,749,752	$	1.36
Dilutive effect of stock options		—		668,730
Diluted
Income available to common stockholders plus assumed exercises of stock options	$	44,707		33,418,482	$	1.34
Six Months Ended June 30, 2023
Basic
Income available to common stockholders	$	112,543		32,906,753	$	3.42
Dilutive effect of stock options		—		559,178
Diluted
Income available to common stockholders plus    assumed exercises of stock options	$	112,543		33,465,931	$	3.36
Six Months Ended June 30, 2022
Basic
Income available to common stockholders	$	80,622		32,708,563	$	2.46
Dilutive effect of stock options		—		658,236
Diluted
Income available to common stockholders plus    assumed exercises of stock options	$	80,622		33,366,799	$	2.42

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

	Shares
Three Months Ended June 30, 2023		305,407
Three Months Ended June 30, 2022		122,489
Six Months Ended June 30, 2023		307,608
Six Months Ended June 30, 2022		131,779

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Fair Value Measurements

6 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

(10) 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 judgment or estimation. This category includes certain collaterally dependent 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)
June 30, 2023
Debt securities available for sale:
U.S. Treasury	$	1,510,066	$	—	$	—	$	1,510,066
U.S. federal agencies		—		13,536		—		13,536
Mortgage-backed securities		—		15,620		—		15,620
States and political subdivisions		—		10,459		427		10,886
Asset backed securities		—		12,435		—		12,435
Other debt securities		—		6,884		—		6,884
Derivative assets		—		23,340		—		23,340
Derivative liabilities		—		21,813		—		21,813
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:

	Six Months Ended June 30,			Twelve Months Ended December 31,
	2023			2022
	(Dollars in thousands)
Balance at the beginning of the year	$	454		$	320
Purchases		—			255
Settlements		(30	)		(110	)
Total unrealized gain		3			(11	)
Balance at the end of the period	$	427		$	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 six months ended June 30, 2023, the Company did not transfer any debt securities. In addition, 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 June 30, 2023
Equity securities	$	15,172
Collateral dependent loans		122
Repossessed assets		320
Other real estate owned		5,100
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 based on 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 debt 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:

	June 30, 2023				December 31, 2022
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(Dollars in thousands)
FINANCIAL ASSETS
Level 2 inputs:
Cash and cash equivalents	$	2,409,142	$	2,409,142	$	3,168,910	$	3,168,910
Federal funds sold		4,481		4,481		2,850		2,850
Debt securities held for investment		8		8		13		13
Loans held for sale		8,783		8,783		6,232		6,232
Level 3 inputs:
Debt securities held for investment		1,185		1,185		2,370		2,370
Loans, net of allowance for credit losses		7,201,772		6,915,262		6,850,835		6,563,755
FINANCIAL LIABILITIES
Level 2 inputs:
Deposits		10,475,180		10,096,793		10,974,228		10,614,840
Short-term borrowings		3,893		3,893		300		300
Subordinated debt		86,072		79,834		86,044		82,385
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS
Loan commitments				4,938				4,598
Letters of credit				530				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. 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 June 30, 2023 or December 31, 2022.

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Derivative Financial Instruments

6 Months Ended

Jun. 30, 2023

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

(11) 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 June 30, 2023, the Company had a margin liability included in other liabilities in the amount of $5.5 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:

		June 30, 2023						December 31, 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		2,416		$	11,057			2,698		$	8,868
Derivative liabilities	Barrels		(2,416	)		(10,460	)		(2,698	)		(8,259	)
Gas/Natural Gas Liquids
Derivative assets	MMBTUs/Gallons		53,649			12,283			25,059			11,877
Derivative liabilities	MMBTUs/Gallons		(53,649	)		(11,353	)		(25,059	)		(11,424	)
Total Fair Value	Included in
Derivative assets	Other assets					23,340						20,745
Derivative liabilities	Other liabilities					(21,813	)					(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:

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)				(Dollars in thousands)
Derivative income	$	260	$	189	$	349	$	348

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 the 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:

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Credit exposure	$	21,093	$	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

6 Months Ended

Jun. 30, 2023

Segment Reporting [Abstract]

Segment Information

(12) 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 and Fort Worth metropolitan areas. 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)
Three Months Ended June 30, 2023
Net interest income	$	29,269	$	57,617	$	13,509	$	4,123	$	1,058	$	350		$	—		$	105,926
Noninterest income		7,090		19,986		467		255		12,350		63,688			(55,862	)		47,974
Income before taxes		21,588		43,184		9,857		791		4,298		45,925			(55,677	)		69,966
Three Months Ended June 30, 2022
Net interest income	$	21,962	$	49,615	$	9,964	$	3,743	$	2,079	$	(505	)	$	9		$	86,867
Noninterest income		5,504		18,152		293		286		10,753		52,756			(45,146	)		42,598
Income before taxes		15,142		36,462		4,672		1,436		4,643		37,901			(45,009	)		55,247
Six Months Ended June 30, 2023
Net interest income	$	60,008	$	115,302	$	28,660	$	8,747	$	2,000	$	365		$	—		$	215,082
Noninterest income		13,177		39,518		681		534		26,522		129,831			(114,461	)		95,802
Income before taxes		44,898		86,783		19,501		2,421		10,462		94,342			(114,096	)		144,311
Six Months Ended June 30, 2022
Net interest income	$	41,570	$	94,183	$	17,584	$	5,437	$	4,992	$	(1,412	)	$	20		$	162,374
Noninterest income		15,277		34,997		484		419		23,736		95,330			(83,995	)		86,248
Income before taxes		33,313		67,801		7,499		1,821		10,688		61,549			(83,715	)		98,956
Total Assets:
June 30, 2023	$	3,436,504	$	6,810,321	$	1,276,354	$	542,292	$	241,921	$	1,217,957		$	(1,505,084	)	$	12,020,265
December 31, 2022		3,412,369		6,886,066		1,404,033		541,002		171,679		1,473,443			(1,500,729	)		12,387,863

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.

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Description of Business and Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2023

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited interim consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., Pegasus Bank ("Pegasus"), Worthington Bank ("Worthington") and BancFirst and its subsidiaries ("BancFirst"). The principal operating subsidiaries of BancFirst are BFTower, LLC, BFC-PNC 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 unaudited interim consolidated financial statements.

The accompanying unaudited interim consolidated financial statements and notes are presented in accordance with U.S. GAAP for interim financial information and the instructions for Form 10-Q adopted by the Securities and Exchange Commission (“SEC”). The information contained in the consolidated financial statements and footnotes included in BancFirst Corporation’s Annual Report on Form 10-K for the year ended December 31, 2022, should be referred to in connection with these unaudited interim consolidated financial statements. Operating results for the interim periods disclosed herein are not necessarily indicative of the results that may be expected for a full year or any future period.

The unaudited interim consolidated financial statements contained herein reflect all adjustments, which are, in the opinion of management, necessary to provide a fair statement of the financial position and results of operations of the Company for the interim periods presented. All such adjustments are of a normal and recurring nature.

Reclassifications

Reclassifications

Certain loan segments from 2022 have been reclassified to conform to the 2023 presentation. Such reclassifications had no effect on previously reported balance sheets, cash flows, stockholders’ equity or comprehensive income.

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 accounting principles generally accepted in the United States 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.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Standards Adopted During the Current Period:

In March 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 January 1, 2023. ASU No. 2022-02 did not have a significant impact on the Company’s consolidated financial statements.

In March 2023, the 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") and Low-Income Housing Tax Credits ("LIHTC") that will be affected by ASU 2023-02. Upon adoption of ASU No. 2023-02, the Company recorded $21.8 million in other assets and other liabilities on the consolidated balance sheet for unfunded LIHTC commitments and amortized $977,000 of NMTC 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.

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Securities (Tables)

6 Months Ended

Jun. 30, 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
June 30, 2023	(Dollars in thousands)
Mortgage backed securities (1)	$	8	$	—	$	—	$	8
States and political subdivisions		685		—		—		685
Other securities		500		—		—		500
Total	$	1,193	$	—	$	—	$	1,193
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
June 30, 2023	(Dollars in thousands)
U.S. treasuries	$	1,599,593	$	—	$	(89,527	)	$	1,510,066
U.S. federal agencies		13,368		170		(2	)		13,536
Mortgage backed securities (1)		17,479		10		(1,869	)		15,620
States and political subdivisions		10,998		21		(133	)		10,886
Asset backed securities		12,784		—		(349	)		12,435
Other securities		8,163		—		(1,279	)		6,884
Total	$	1,662,385	$	201	$	(93,159	)	$	1,569,427
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.

	June 30, 2023				December 31, 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		842		842		1,195		1,195
After five years but within ten years		1		1		2		2
After ten years		—		—		—		—
Total	$	1,193	$	1,193	$	2,383	$	2,383
Available for Sale
Contractual maturity of debt securities:
Within one year	$	150,837	$	147,496	$	101,607	$	100,655
After one year but within five years		1,269,157		1,187,686		1,316,874		1,233,725
After five years but within ten years		202,889		196,755		170,513		163,101
After ten years		39,502		37,490		42,897		40,740
Total debt securities	$	1,662,385	$	1,569,427	$	1,631,891	$	1,538,221

Company's Book Value of Pledged Debt Securities

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

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Book value of pledged securities	$	593,260	$	573,952

Proceeds from Sales and Realized Losses on Available foe Sale Debt Securities

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

	For the Six Months Ended June 30,
	2023		2022
	(Dollars in thousands)
Proceeds	$	—	$	222,473
Gross losses realized		—		3,990

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 June 30, 2023 and December 31, 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)
June 30, 2023
Available for Sale
U.S. treasuries		73	$	414,002	$	13,360	$	1,096,064	$	76,167	$	1,510,066	$	89,527
U.S. federal agencies		3		1,305		2		—		—		1,305		2
Mortgage backed securities		91		1,452		5		13,899		1,864		15,351		1,869
States and political subdivisions		10		2,029		22		1,251		111		3,280		133
Asset backed securities		1		—		—		12,435		349		12,435		349
Other securities		3		4,476		687		2,408		592		6,884		1,279
Total		181	$	423,264	$	14,076	$	1,126,057	$	79,083	$	1,549,321	$	93,159
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)

6 Months Ended

Jun. 30, 2023

Receivables [Abstract]

Summary of Loans Held for Investment by Portfolio Segment

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

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied		969,914		908,494
Commercial real estate non-owner occupied		1,412,476		1,383,150
Construction and development < 60 months		549,068		475,236
Construction residential real estate < 60 months		276,726		303,305
Residential real estate first lien		1,189,944		1,117,899
Residential real estate all other		219,752		196,198
Agriculture		422,327		408,037
Commercial non-real estate		1,349,789		1,241,454
Consumer non-real estate		457,897		446,756
Oil and gas		450,799		463,034
Total (1)	$	7,298,692	$	6,943,563
(1) Excludes accrued interest receivable of $34.3 million at June 30, 2023 and $30.6 million at December 31, 2022, that is recorded in accrued interest receivable and other assets.

Summary of Other Real Estate Owned and Repossessed Assets

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

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Other real estate owned and repossessed assets	$	41,612	$	36,936

Summary of Rental Income and Operating Expenses

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)
Rental income	$	2,778	$	2,643	$	5,468	$	5,313
Operating expense		2,967		2,299		5,348		4,738

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.

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Real estate:
Commercial real estate owner occupied	$	4,360	$	1,795
Commercial real estate non-owner occupied		706		667
Construction and development < 60 months		81		93
Construction residential real estate < 60 months		376		430
Residential real estate first lien		2,717		1,947
Residential real estate all other		845		55
Agriculture		2,141		2,734
Commercial non-real estate		6,497		7,066
Consumer non-real estate		241		192
Oil and gas		83		320
Total	$	18,047	$	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
(Dollars in thousands)	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
As of June 30, 2023
Real estate:
Commercial real estate owner occupied	$	2,439	$	1,684	$	6,844	$	10,967	$	958,947	$	969,914	$	4,152
Commercial real estate non-owner occupied		236		8,752		875		9,863		1,402,613		1,412,476		213
Construction and development < 60 months		52		—		984		1,036		548,032		549,068		903
Construction residential real estate < 60 months		1,342		103		543		1,988		274,738		276,726		543
Residential real estate first lien		2,597		1,328		2,534		6,459		1,183,485		1,189,944		879
Residential real estate all other		1,092		280		840		2,212		217,540		219,752		61
Agriculture		833		268		838		1,939		420,388		422,327		50
Commercial non-real estate		3,795		928		6,055		10,778		1,339,011		1,349,789		1,567
Consumer non-real estate		2,405		807		569		3,781		454,116		457,897		431
Oil and gas		236		654		83		973		449,826		450,799		—
Total	$	15,027	$	14,804	$	20,165	$	49,996	$	7,248,696	$	7,298,692	$	8,799
	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
As of 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 table 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
(Dollars in thousands)	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
As of June 30, 2023
Commercial real estate owner occupied
Grade 1	$	75,514	$	174,029	$	131,583	$	96,065	$	91,649	$	150,940	$	51,100	$	770,880
Grade 2		22,851		42,130		30,830		24,524		19,136		30,000		18,248		187,719
Grade 3		19		—		4,450		1,193		883		1,459		212		8,216
Grade 4		—		314		345		311		1,166		624		—		2,760
Grade 5		—		—		—		—		339		—		—		339
Total commercial real estate owner occupied		98,384		216,473		167,208		122,093		113,173		183,023		69,560		969,914
Commercial real estate non-owner occupied
Grade 1	$	116,433	$	324,990	$	221,196	$	159,511	$	92,137	$	79,849	$	45,799	$	1,039,915
Grade 2		44,955		107,929		43,476		33,416		32,628		71,739		23,609		357,752
Grade 3		—		6,733		5		150		6,207		795		—		13,890
Grade 4		44		820		—		—		—		55		—		919
Total commercial real estate non-owner occupied		161,432		440,472		264,677		193,077		130,972		152,438		69,408		1,412,476
Construction and development < 60 months
Grade 1	$	88,593	$	139,210	$	77,235	$	14,074	$	4,622	$	6,522	$	70,118	$	400,374
Grade 2		42,927		36,862		15,894		1,584		13,984		2,418		33,679		147,348
Grade 3		—		903		103		98		—		7		154		1,265
Grade 4		—		81		—		—		—		—		—		81
Total construction and development < 60 months		131,520		177,056		93,232		15,756		18,606		8,947		103,951		549,068
Construction residential real estate < 60 months
Grade 1	$	106,520	$	80,355	$	1,897	$	257	$	6	$	39	$	33,846	$	222,920
Grade 2		25,787		26,221		38		22		—		388		90		52,546
Grade 3		99		785		—		—		—		—		—		884
Grade 4		376		—		—		—		—		—		—		376
Total construction residential real estate < 60 months		132,782		107,361		1,935		279		6		427		33,936		276,726
Residential real estate first lien
Grade 1	$	160,801	$	256,377	$	189,258	$	130,017	$	78,783	$	168,639	$	3,721	$	987,596
Grade 2		21,024		46,624		35,716		24,654		12,691		44,160		—		184,869
Grade 3		1,236		1,867		2,959		1,035		1,664		3,926		—		12,687
Grade 4		361		177		1,181		292		646		2,135		—		4,792
Total residential real estate first lien		183,422		305,045		229,114		155,998		93,784		218,860		3,721		1,189,944
Residential real estate all other
Grade 1	$	25,642	$	28,209	$	8,615	$	9,218	$	4,625	$	14,003	$	39,561	$	129,873
Grade 2		2,380		4,982		2,202		1,983		1,509		3,476		69,231		85,763
Grade 3		171		422		77		45		146		471		1,877		3,209
Grade 4		—		24		10		26		—		50		797		907
Total residential real estate all other		28,193		33,637		10,904		11,272		6,280		18,000		111,466		219,752
Agriculture
Grade 1	$	32,122	$	61,718	$	39,267	$	32,007	$	18,986	$	36,796	$	39,208	$	260,104
Grade 2		18,303		23,027		19,601		8,718		9,835		17,869		43,466		140,819
Grade 3		6,781		1,204		1,527		3,396		144		3,815		3,255		20,122
Grade 4		59		668		57		169		44		254		31		1,282
Total Agriculture		57,265		86,617		60,452		44,290		29,009		58,734		85,960		422,327
Commercial non-real estate
Grade 1	$	148,198	$	288,490	$	176,959	$	48,809	$	42,278	$	43,672	$	293,889	$	1,042,295
Grade 2		55,938		65,449		28,746		16,090		10,820		21,080		96,657		294,780
Grade 3		1,208		2,284		575		172		619		1,381		2,491		8,730
Grade 4		11		983		348		693		372		279		1,034		3,720
Grade 5		—		—		—		—		264		—		—		264
Total commercial non-real estate		205,355		357,206		206,628		65,764		54,353		66,412		394,071		1,349,789
Consumer non-real estate
Grade 1	$	118,847	$	146,280	$	76,246	$	27,782	$	13,664	$	4,737	$	26,330	$	413,886
Grade 2		7,960		16,721		8,236		2,766		971		1,804		1,642		40,100
Grade 3		155		984		1,013		401		245		115		16		2,929
Grade 4		39		392		352		44		85		25		4		941
Grade 5		—		41		—		—		—		—		—		41
Total consumer non-real estate		127,001		164,418		85,847		30,993		14,965		6,681		27,992		457,897
Oil and gas
Grade 1	$	62,557	$	13,971	$	96,748	$	12,909	$	2,273	$	17,373	$	159,813	$	365,644
Grade 2		6,779		5,334		2,251		432		18,470		255		47,498		81,019
Grade 3		—		2,091		240		3		—		—		1,719		4,053
Grade 4		—		83		—		—		—		—		—		83
Total oil and gas		69,336		21,479		99,239		13,344		20,743		17,628		209,030		450,799
Total loans held for investment	$	1,194,690	$	1,909,764	$	1,219,236	$	652,866	$	481,891	$	731,150	$	1,109,095	$	7,298,692

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
(Dollars in thousands)	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
Three months ended June 30, 2023
Commercial real estate owner occupied
Current-period gross charge-offs	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—
Commercial real estate non-owner occupied
Current-period gross charge-offs		—		—		—		—		—		—		—		—
Construction and development < 60 months
Current-period gross charge-offs		—		—		—		2		—		—		—		2
Construction residential real estate < 60 months
Current-period gross charge-offs		—		—		—		—		—		—		—		—
Residential real estate first lien
Current-period gross charge-offs		—		—		19		21		—		2		—		42
Residential real estate all other
Current-period gross charge-offs		—		2		—		—		—		—		—		2
Agriculture
Current-period gross charge-offs		—		—		—		301		1		—		—		302
Commercial non-real estate
Current-period gross charge-offs		42		34		1		20		—		5		—		102
Consumer non-real estate
Current-period gross charge-offs		29		186		115		14		28		11		15		398
Oil and gas
Current-period gross charge-offs		—		2		—		—		—		—		—		2
Total current-period gross charge-offs	$	71	$	224	$	135	$	358	$	29	$	18	$	15	$	850

	Term Loans Amortized Cost Basis by Origination Year												Revolving Loans
(Dollars in thousands)	2023		2022		2021		2020		2019		Prior		Amortized Cost Basis		Total
Six months ended June 30, 2023
Commercial real estate owner occupied
Current-period gross charge-offs	$	—	$	7	$	1	$	22	$	18	$	—	$	—	$	48
Commercial real estate non-owner occupied
Current-period gross charge-offs		—		—		—		—		—		3		—		3
Construction and development < 60 months
Current-period gross charge-offs		—		2		—		2		—		—		—		4
Construction residential real estate < 60 months
Current-period gross charge-offs		—		—		—		—		—		—		—		—
Residential real estate first lien
Current-period gross charge-offs		—		—		19		21		—		4		—		44
Residential real estate all other
Current-period gross charge-offs		—		4		19		—		1		4		—		28
Agriculture
Current-period gross charge-offs		—		4		—		317		14		2		—		337
Commercial non-real estate
Current-period gross charge-offs		42		101		63		20		—		52		—		278
Consumer non-real estate
Current-period gross charge-offs		29		262		147		29		37		17		17		538
Oil and gas
Current-period gross charge-offs		—		2		—		—		—		—		—		2
Total current-period gross charge-offs	$	71	$	382	$	249	$	411	$	70	$	82	$	17	$	1,282

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)
Three Months Ended June 30, 2023
Real estate:
Commercial real estate owner occupied	$	6,547	$	—		$	3	$	3		$	258		$	6,808
Commercial real estate non-owner occupied		32,120		—			—		—			1,312			33,432
Construction and development < 60 months		3,608		(2	)		3		1			(169	)		3,440
Construction residential real estate < 60 months		3,226		—			—		—			327			3,553
Residential real estate first lien		4,454		(42	)		10		(32	)		333			4,755
Residential real estate all other		1,444		(2	)		1		(1	)		218			1,661
Agriculture		6,268		(302	)		7		(295	)		453			6,426
Commercial non-real estate		25,079		(102	)		127		25			23			25,127
Consumer non-real estate		4,232		(398	)		35		(363	)		475			4,344
Oil and gas		7,782		(2	)		—		(2	)		(406	)		7,374
Total	$	94,760	$	(850	)	$	186	$	(664	)	$	2,824		$	96,920

	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)
Six Months Ended June 30, 2023
Real estate:
Commercial real estate owner occupied	$	6,416	$	(48	)	$	52	$	4		$	388		$	6,808
Commercial real estate non-owner occupied		30,190		(3	)		—		(3	)		3,245			33,432
Construction and development < 60 months		3,778		(4	)		6		2			(340	)		3,440
Construction residential real estate < 60 months		3,275		—			—		—			278			3,553
Residential real estate first lien		4,092		(44	)		13		(31	)		694			4,755
Residential real estate all other		1,418		(28	)		3		(25	)		268			1,661
Agriculture		6,217		(337	)		13		(324	)		533			6,426
Commercial non-real estate		25,106		(278	)		149		(129	)		150			25,127
Consumer non-real estate		4,132		(538	)		92		(446	)		658			4,344
Oil and gas		8,104		(2	)		—		(2	)		(728	)		7,374
Total	$	92,728	$	(1,282	)	$	328	$	(954	)	$	5,146		$	96,920

	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)
Three Months Ended June 30, 2022
Real estate:
Commercial real estate owner occupied	$	8,262	$	(4	)	$	30	$	26		$	(1,360	)	$	6,928
Commercial real estate non-owner occupied		16,348		—			—		—			(33	)		16,315
Construction and development < 60 months		3,272		—			2		2			406			3,680
Construction residential real estate < 60 months		1,103		—			—		—			80			1,183
Residential real estate first lien		3,394		(5	)		6		1			(40	)		3,355
Residential real estate all other		1,560		(36	)		—		(36	)		(44	)		1,480
Agriculture		8,018		—			4		4			(66	)		7,956
Commercial non-real estate		25,163		(717	)		26		(691	)		898			25,370
Consumer non-real estate		3,730		(153	)		42		(111	)		431			4,050
Oil and gas		16,389		—			—		—			229			16,618
Total	$	87,239	$	(915	)	$	110	$	(805	)	$	501		$	86,935

	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)
Six Months Ended June 30, 2022
Real estate:
Commercial real estate owner occupied	$	7,550	$	—	$	(20	)	$	78	$	58		$	(680	)	$	6,928
Commercial real estate non-owner occupied		16,807		—		—			—		—			(492	)		16,315
Construction and development < 60 months		3,454		—		—			5		5			221			3,680
Construction residential real estate < 60 months		1,051		—		—			—		—			132			1,183
Residential real estate first lien		3,048		2		(49	)		13		(36	)		341			3,355
Residential real estate all other		1,567		—		(36	)		402		366			(453	)		1,480
Agriculture		8,392		—		(125	)		7		(118	)		(318	)		7,956
Commercial non-real estate		25,565		48		(774	)		136		(638	)		395			25,370
Consumer non-real estate		3,694		28		(233	)		80		(153	)		481			4,050
Oil and gas		12,808		—		—			—		—			3,810			16,618
Total	$	83,936	$	78	$	(1,237	)	$	721	$	(516	)	$	3,437		$	86,935

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 six month period ended June 30, 2023. The credit-deteriorated loans purchased during the six months ended June 30, 2022 were as follows:

	Loans acquired with deteriorated credit quality
	(Dollars in thousands)
For the period ended June 30, 2022
Purchase price of loans at acquisition	$	661
Allowance for credit losses at acquisition		78
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
	(Dollars in thousands)
As of June 30, 2023
Real estate:
Commercial real estate owner occupied	$	2,129	$	—	$	—	$	—	$	2,129	$	863
Commercial real estate non-owner occupied		664		—		—		—		664		270
Construction and development < 60 months		—		—		—		—		—		—
Construction residential real estate < 60 months		376		—		—		—		376		45
Residential real estate first lien		371		—		—		—		371		118
Residential real estate all other		41		—		—		—		41		19
Agriculture		3,436		672		—		3,068		7,176		2,694
Commercial non-real estate		—		4,879		—		—		4,879		1,747
Consumer non-real estate		—		—		—		93		93		56
Oil and gas		—		—		—		—		—		—
Total collateral-dependent loans held for investment	$	7,017	$	5,551	$	—	$	3,161	$	15,729	$	5,812
	Collateral Type
	Real Estate		Business Assets		Energy Reserves		Other Assets		Total		Specific Allocation
	(Dollars in thousands)
As of December 31, 2022
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 and Repossessed Assets

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

	Six Months Ended June 30,
	2023		2022
	(Dollars in thousands)
Other real estate owned	$	667	$	4,065
Repossessed assets		946		503
Total	$	1,613	$	4,568

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Intangible Assets and Goodwill (Tables)

6 Months Ended

Jun. 30, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

The following is a summary of intangible assets as of the date listed:

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(Dollars in thousands)
June 30, 2023
Core deposit intangibles	$	33,298	$	(15,316	)	$	17,982
Customer relationship intangibles		3,350		(3,109	)		241
Total	$	36,648	$	(18,425	)	$	18,223
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

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)
Six months ended June 30, 2023
Balance at beginning and end of period	$	13,767	$	61,212	$	68,855	$	32,133	$	5,464	$	624	$	182,055

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

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)
Six Months Ended June 30, 2023
Outstanding at December 31, 2022		1,310,290		$	52.51
Exercised		(45,899	)		33.54
Canceled, forfeited, or expired		(8,500	)		87.97
Outstanding at June 30, 2023		1,255,891			52.96	10.18 Yrs.	$	49,029
Exercisable at June 30, 2023		477,266			31.74	6.41 Yrs.	$	28,760

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:

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)				(Dollars in thousands)
Total intrinsic value of options exercised	$	1,979	$	2,979	$	2,331	$	8,943
Cash received from options exercised		1,318		1,303		1,539		4,292
Tax benefit realized from options exercised		475		716		560		2,150

Assumptions Used for Computing Stock-Based Compensation Expense

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:

	Six Months Ended June 30,
	2023		2022
Weighted average grant-date fair value per share of options granted	$	—	$	29.08
Risk-free interest rate		—	1.75 to 3.25%
Dividend yield		—	2.00%
Stock price volatility		—	34.61 to 34.71%
Expected term		—	10 Yrs

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
Six Months Ended June 30, 2023
Nonvested at December 31, 2022		—
Granted		2,625	$	93.66
Nonvested at June 30, 2023		2,625

Summary of Accumulated Stock Units

A summary of the accumulated stock units is as follows:

	June 30,		December 31,
	2023		2022
Accumulated stock units		115,848		129,609
Average price	$	38.26	$	34.91

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:

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)				(Dollars in thousands)
Stock-based compensation expense	$	831	$	460	$	1,213	$	918
Tax benefit		200		111		292		221
Stock-based compensation expense, net of tax	$	631	$	349	$	921	$	697

Unearned Stock-based Compensation Expense

The Company will continue to amortize the unearned stock-based compensation expense over the remaining vesting period of approximately seven years. The following table shows the unearned stock-based compensation expense:

	June 30, 2023
	(Dollars in thousands)
Unearned stock-based compensation expense	$	11,867

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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2023

Equity [Abstract]

Summary of Shares Repurchased Under Stock Purchase Program

The following table is a summary of the shares under the program:

	June 30, 2023
Shares remaining to be repurchased		500,486

Required Capital Amounts and Company's Respective Ratios

The actual and required capital amounts and ratios are shown in the following table:

				Required						To Be Well
				For Capital			With			Capitalized Under
				Adequacy			Capital Conservation			Prompt Corrective
	Actual			Purposes			Buffer			Action Provisions
	Amount		Ratio	Amount		Ratio	Amount		Ratio	Amount		Ratio
	(Dollars in thousands)
As of June 30, 2023:
Total Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,393,706	16.81%	$	663,195	8.00%	$	870,444	10.50%	N/A		N/A
BancFirst		1,160,255	16.23%		571,919	8.00%		750,644	10.50%	$	714,899	10.00%
Pegasus		138,455	17.62%		62,861	8.00%		82,505	10.50%		78,576	10.00%
Worthington		49,963	13.30%		30,055	8.00%		39,447	10.50%		37,568	10.00%
Common Equity Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,211,518	14.61%	$	373,047	4.50%	$	580,296	7.00%	N/A		N/A
BancFirst		1,054,783	14.75%		321,705	4.50%		500,429	7.00%	$	464,684	6.50%
Pegasus		130,150	16.56%		35,359	4.50%		55,003	7.00%		51,074	6.50%
Worthington		46,200	12.30%		16,906	4.50%		26,698	7.00%		24,419	6.50%
Tier 1 Capital
(to Risk Weighted Assets)-
BancFirst Corporation	$	1,237,518	14.93%	$	497,396	6.00%	$	704,645	8.50%	N/A		N/A
BancFirst		1,074,783	15.03%		428,940	6.00%		607,664	8.50%	$	571,919	8.00%
Pegasus		130,150	16.56%		47,145	6.00%		66,789	8.50%		62,861	8.00%
Worthington		46,200	12.30%		22,541	6.00%		31,933	8.50%		30,055	8.00%
Tier 1 Capital
(to Quarterly Average Assets)-
BancFirst Corporation	$	1,237,518	10.50%	$	471,255	4.00%	N/A		N/A	N/A		N/A
BancFirst		1,074,783	10.63%		401,047	4.00%	N/A		N/A	$	501,309	5.00%
Pegasus		130,150	10.41%		50,026	4.00%	N/A		N/A		62,532	5.00%
Worthington		46,200	9.18%		20,136	4.00%	N/A		N/A		25,171	5.00%

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Net Income Per Common Share (Tables)

6 Months Ended

Jun. 30, 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:

	Income (Numerator)		Shares (Denominator)		Per Share Amount
	(Dollars in thousands, except per share data)
Three Months Ended June 30, 2023
Basic
Income available to common stockholders	$	55,010		32,920,497	$	1.67
Dilutive effect of stock options		—		546,757
Diluted
Income available to common stockholders plus assumed exercises of stock options	$	55,010		33,467,254	$	1.64
Three Months Ended June 30, 2022
Basic
Income available to common stockholders	$	44,707		32,749,752	$	1.36
Dilutive effect of stock options		—		668,730
Diluted
Income available to common stockholders plus assumed exercises of stock options	$	44,707		33,418,482	$	1.34
Six Months Ended June 30, 2023
Basic
Income available to common stockholders	$	112,543		32,906,753	$	3.42
Dilutive effect of stock options		—		559,178
Diluted
Income available to common stockholders plus    assumed exercises of stock options	$	112,543		33,465,931	$	3.36
Six Months Ended June 30, 2022
Basic
Income available to common stockholders	$	80,622		32,708,563	$	2.46
Dilutive effect of stock options		—		658,236
Diluted
Income available to common stockholders plus    assumed exercises of stock options	$	80,622		33,366,799	$	2.42

Average Exercise Price of Options Excluded from Computation of Diluted Net Income Per Common Share

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

	Shares
Three Months Ended June 30, 2023		305,407
Three Months Ended June 30, 2022		122,489
Six Months Ended June 30, 2023		307,608
Six Months Ended June 30, 2022		131,779

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 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)
June 30, 2023
Debt securities available for sale:
U.S. Treasury	$	1,510,066	$	—	$	—	$	1,510,066
U.S. federal agencies		—		13,536		—		13,536
Mortgage-backed securities		—		15,620		—		15,620
States and political subdivisions		—		10,459		427		10,886
Asset backed securities		—		12,435		—		12,435
Other debt securities		—		6,884		—		6,884
Derivative assets		—		23,340		—		23,340
Derivative liabilities		—		21,813		—		21,813
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:

	Six Months Ended June 30,			Twelve Months Ended December 31,
	2023			2022
	(Dollars in thousands)
Balance at the beginning of the year	$	454		$	320
Purchases		—			255
Settlements		(30	)		(110	)
Total unrealized gain		3			(11	)
Balance at the end of the period	$	427		$	454

Assets Measured at Fair Value on Nonrecurring Basis

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 June 30, 2023
Equity securities	$	15,172
Collateral dependent loans		122
Repossessed assets		320
Other real estate owned		5,100
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

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:

	June 30, 2023				December 31, 2022
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(Dollars in thousands)
FINANCIAL ASSETS
Level 2 inputs:
Cash and cash equivalents	$	2,409,142	$	2,409,142	$	3,168,910	$	3,168,910
Federal funds sold		4,481		4,481		2,850		2,850
Debt securities held for investment		8		8		13		13
Loans held for sale		8,783		8,783		6,232		6,232
Level 3 inputs:
Debt securities held for investment		1,185		1,185		2,370		2,370
Loans, net of allowance for credit losses		7,201,772		6,915,262		6,850,835		6,563,755
FINANCIAL LIABILITIES
Level 2 inputs:
Deposits		10,475,180		10,096,793		10,974,228		10,614,840
Short-term borrowings		3,893		3,893		300		300
Subordinated debt		86,072		79,834		86,044		82,385
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS
Loan commitments				4,938				4,598
Letters of credit				530				542

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Derivative Financial Instruments (Tables)

6 Months Ended

Jun. 30, 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:

		June 30, 2023						December 31, 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		2,416		$	11,057			2,698		$	8,868
Derivative liabilities	Barrels		(2,416	)		(10,460	)		(2,698	)		(8,259	)
Gas/Natural Gas Liquids
Derivative assets	MMBTUs/Gallons		53,649			12,283			25,059			11,877
Derivative liabilities	MMBTUs/Gallons		(53,649	)		(11,353	)		(25,059	)		(11,424	)
Total Fair Value	Included in
Derivative assets	Other assets					23,340						20,745
Derivative liabilities	Other liabilities					(21,813	)					(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:

	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
	(Dollars in thousands)				(Dollars in thousands)
Derivative income	$	260	$	189	$	349	$	348

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:

	June 30, 2023		December 31, 2022
	(Dollars in thousands)
Credit exposure	$	21,093	$	6,560

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Segment Information (Tables)

6 Months Ended

Jun. 30, 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)
Three Months Ended June 30, 2023
Net interest income	$	29,269	$	57,617	$	13,509	$	4,123	$	1,058	$	350		$	—		$	105,926
Noninterest income		7,090		19,986		467		255		12,350		63,688			(55,862	)		47,974
Income before taxes		21,588		43,184		9,857		791		4,298		45,925			(55,677	)		69,966
Three Months Ended June 30, 2022
Net interest income	$	21,962	$	49,615	$	9,964	$	3,743	$	2,079	$	(505	)	$	9		$	86,867
Noninterest income		5,504		18,152		293		286		10,753		52,756			(45,146	)		42,598
Income before taxes		15,142		36,462		4,672		1,436		4,643		37,901			(45,009	)		55,247
Six Months Ended June 30, 2023
Net interest income	$	60,008	$	115,302	$	28,660	$	8,747	$	2,000	$	365		$	—		$	215,082
Noninterest income		13,177		39,518		681		534		26,522		129,831			(114,461	)		95,802
Income before taxes		44,898		86,783		19,501		2,421		10,462		94,342			(114,096	)		144,311
Six Months Ended June 30, 2022
Net interest income	$	41,570	$	94,183	$	17,584	$	5,437	$	4,992	$	(1,412	)	$	20		$	162,374
Noninterest income		15,277		34,997		484		419		23,736		95,330			(83,995	)		86,248
Income before taxes		33,313		67,801		7,499		1,821		10,688		61,549			(83,715	)		98,956
Total Assets:
June 30, 2023	$	3,436,504	$	6,810,321	$	1,276,354	$	542,292	$	241,921	$	1,217,957		$	(1,505,084	)	$	12,020,265
December 31, 2022		3,412,369		6,886,066		1,404,033		541,002		171,679		1,473,443			(1,500,729	)		12,387,863

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Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2023 USD ($)
ASU 2022-02 [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Change in Accounting Principle, Accounting Standards Update, Adoption Date	Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]	true
ASU 2023-02 [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
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 LIHTC commitments	$ 21,800,000
Amortization of NMTC investments	$ 977,000

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Recent Developments Including Mergers and Acquisitions - Additional Information (Detail) $ in Thousands	Feb. 08, 2022 USD ($) Location	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Business Combination Separately Recognized Transactions [Line Items]
Total assets		$ 12,020,265	$ 12,387,863
Loans held for investment (net of unearned interest)		7,298,692	6,943,563
Deposits		10,475,180	10,974,228
Goodwill		$ 182,055	$ 182,055
Worthington [Member]
Business Combination Separately Recognized Transactions [Line Items]
Purchase price	$ 77,700
Total assets	478,000
Loans held for investment (net of unearned interest)	257,000
Deposits	430,000
Intangibles assets, net	5,900
Goodwill	$ 32,100
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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Securities - Summary of Amortized Cost and Estimated Fair Values of Debt Securities Held for Investment (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 1,193	$ 2,383
Estimated Fair Value	1,193	2,383
Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	8	13
Estimated Fair Value	8	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	Jun. 30, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 1,662,385	$ 1,631,891
Gross Unrealized Gains	201	254
Gross Unrealized Losses	(93,159)	(93,924)
Estimated Fair Value	1,569,427	1,538,221
U.S. Treasuries [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,599,593	1,568,563
Gross Unrealized Losses	(89,527)	(90,699)
Estimated Fair Value	1,510,066	1,477,864
U.S. Federal Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,368	15,025
Gross Unrealized Gains	170	198
Gross Unrealized Losses	(2)	(1)
Estimated Fair Value	13,536	15,222
Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,479	18,449
Gross Unrealized Gains	10	21
Gross Unrealized Losses	(1,869)	(1,884)
Estimated Fair Value	15,620	16,586
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,998	8,320
Gross Unrealized Gains	21	35
Gross Unrealized Losses	(133)	(221)
Estimated Fair Value	10,886	8,134
Asset backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	12,784	13,371
Gross Unrealized Losses	(349)	(361)
Estimated Fair Value	12,435	13,010
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,163	8,163
Gross Unrealized Losses	(1,279)	(758)
Estimated Fair Value	$ 6,884	$ 7,405

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Securities - Additional Information (Detail) - USD ($)		6 Months Ended
	Jan. 10, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-Sale [Line Items]
Sale of low yielding securities			$ 226,000,000
Debt securities. average yield percentage			0.16%
Reinvested in debt securities			$ 220,000,000
Reinvested debt securities, average yield percentage			1.86%
Proceeds from sales of available for sale securities		$ 0	$ 222,473,000
Avaliable for sale of debt securities realized gains or losses		$ 0
United States Treasury Notes [Member]
Debt Securities, Available-for-Sale [Line Items]
Debt securities purchased at par value	$ 600,000,000
Debt securities. average yield percentage	1.42%
Debt securities, average maturity period	53 months

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Securities - Maturity of Debt Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 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	842	1,195
Amortized cost, After five years but within ten years	1	2
Amortized Cost	1,193	2,383
Available for sale, Contractual maturity of debt securities, Amortized Cost
Amortized Cost, Within one year	150,837	101,607
Amortized Cost, After one year but within five years	1,269,157	1,316,874
Amortized Cost, After five years but within ten years	202,889	170,513
Amortized Cost, After ten years	39,502	42,897
Amortized Cost	1,662,385	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	842	1,195
Estimated Fair Value, After five years but within ten years	1	2
Estimated Fair Value	1,193	2,383
Available for sale, Contractual maturity of debt securities, Estimated Fair Value
Estimated Fair Value, Within one year	147,496	100,655
Estimated Fair Value, After one year but within five years	1,187,686	1,233,725
Estimated Fair Value, After five years but within ten years	196,755	163,101
Estimated Fair Value, After ten years	37,490	40,740
Total debt securities	$ 1,569,427	$ 1,538,221

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Securities - Company's Book Value of Pledged Debt Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 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	$ 593,260	$ 573,952

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Securities - Schedule of Proceeds from Sales and Realized Losses on Available for Sale Sebt Securities (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 0	$ 222,473,000
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	Jun. 30, 2023 USD ($) Investments	Dec. 31, 2022 USD ($) Investments
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	181	179
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 423,264	$ 818,115
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	14,076	29,153
Available-for-sale Securities, 12 Months or Longer, Fair Value	1,126,057	698,341
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	79,083	64,771
Available-for-sale Securities, Fair Value, Total	1,549,321	1,516,456
Available-for-sale Securities, Unrealized Losses, Total	$ 93,159	$ 93,924
U.S. Treasuries [Member]
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	73	74
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 414,002	$ 787,925
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	13,360	27,078
Available-for-sale Securities, 12 Months or Longer, Fair Value	1,096,064	689,939
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	76,167	63,621
Available-for-sale Securities, Fair Value, Total	1,510,066	1,477,864
Available-for-sale Securities, Unrealized Losses, Total	$ 89,527	$ 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	$ 1,305
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	2
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	1,305	349
Available-for-sale Securities, Unrealized Losses, Total	$ 2	$ 1
Mortgage Backed Securities [Member]
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	91	92
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 1,452	$ 10,001
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	5	1,239
Available-for-sale Securities, 12 Months or Longer, Fair Value	13,899	5,055
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	1,864	645
Available-for-sale Securities, Fair Value, Total	15,351	15,056
Available-for-sale Securities, Unrealized Losses, Total	$ 1,869	$ 1,884
States and Political Subdivisions [Member]
Debt Securities, Available-for-Sale [Abstract]
Number of investments | Investments	10	8
Available-for-sale Securities, Less than 12 Months, Fair Value	$ 2,029	$ 2,308
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	22	184
Available-for-sale Securities, 12 Months or Longer, Fair Value	1,251	464
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	111	37
Available-for-sale Securities, Fair Value, Total	3,280	2,772
Available-for-sale Securities, Unrealized Losses, Total	$ 133	$ 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	$ 12,435
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	349
Available-for-sale Securities, Fair Value, Total	12,435	13,010
Available-for-sale Securities, Unrealized Losses, Total	$ 349	$ 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	$ 4,476	$ 4,871
Available-for-sale Securities, Less than 12 Months, Unrealized Losses	687	291
Available-for-sale Securities, 12 Months or Longer, Fair Value	2,408	2,534
Available-for-sale Securities, 12 Months or Longer, Unrealized Losses	592	467
Available-for-sale Securities, Fair Value, Total	6,884	7,405
Available-for-sale Securities, Unrealized Losses, Total	$ 1,279	$ 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	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	$ 7,298,692	$ 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)	969,914	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)	1,412,476	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)	549,068	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)	276,726	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)	1,189,944	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)	219,752	196,198
Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	422,327	408,037
Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	1,349,789	1,241,454
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	457,897	446,756
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans held for investment (net of unearned interest)	$ 450,799	$ 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	Jun. 30, 2023	Dec. 31, 2022
Receivables [Abstract]
Accrued interest receivable	$ 34.3	$ 30.6

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Loans Held for Investment and Allowance for Credit Losses on Loans - Additional Information (Detail) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items]
Gains (losses) on sale of property held in other real estate owned	$ 266,000	$ 3,800,000
Interest income recognized on nonaccrual loans	0	0
Nonaccrual loans with no related allowance for credit losses	0		$ 0
Balance of modifies loans	9,700,000
Interest income that would have been recognized	718,000	$ 653,000
U.S. Federal Agencies [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans guaranteed by government agencies	6,600,000		4,700,000
Other Real Estate Owned [Member] | Commercial Real Estate
Financing Receivable Recorded Investment [Line Items]
Other real estate	$ 32,900,000		$ 29,400,000
Parent Company [Member]
Financing Receivable Recorded Investment [Line Items]
Percentage of loans secured by real estate	69.00%
BancFirst [Member]
Financing Receivable Recorded Investment [Line Items]
Loan percentage	85.00%
Pegasus and Worthington [Member]
Financing Receivable Recorded Investment [Line Items]
Loan percentage	15.00%

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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	Jun. 30, 2023	Dec. 31, 2022
Summary Of Nonperforming And Restructured Assets [Abstract]
Other real estate owned and repossessed assets	$ 41,612	$ 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) - Real Estate Investment [Member] - Commercial Real Estate [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Rental income	$ 2,778	$ 2,643	$ 5,468	$ 5,313
Operating expense	$ 2,967	$ 2,299	$ 5,348	$ 4,738

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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	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	$ 18,047	$ 15,299
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	4,360	1,795
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	706	667
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	81	93
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	376	430
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	2,717	1,947
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	845	55
Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	2,141	2,734
Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	6,497	7,066
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	241	192
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual Loans, Total	$ 83	$ 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	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	$ 7,298,692	$ 6,943,563
Accruing Loans 90 Days or More Past Due	8,799	7,085
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	969,914	908,494
Accruing Loans 90 Days or More Past Due	4,152	4,580
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,412,476	1,383,150
Accruing Loans 90 Days or More Past Due	213	43
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	549,068	475,236
Accruing Loans 90 Days or More Past Due	903	81
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	276,726	303,305
Accruing Loans 90 Days or More Past Due	543
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,189,944	1,117,899
Accruing Loans 90 Days or More Past Due	879	349
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	219,752	196,198
Accruing Loans 90 Days or More Past Due	61	166
Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	422,327	408,037
Accruing Loans 90 Days or More Past Due	50	1,054
Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	1,349,789	1,241,454
Accruing Loans 90 Days or More Past Due	1,567	345
Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	457,897	446,756
Accruing Loans 90 Days or More Past Due	431	467
Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	450,799	463,034
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	15,027	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	2,439	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	236	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	52	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	1,342	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	2,597	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	1,092	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	833	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	3,795	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	2,405	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	236	654
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	14,804	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	1,684	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	8,752
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		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	103	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	1,328	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	280	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	268	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	928	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	807	648
60 to 89 Days Past Due [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	654
90 Days and Greater [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	20,165	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	6,844	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	875	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	984	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	543	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	2,534	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	840	185
90 Days and Greater [Member] | Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	838	2,265
90 Days and Greater [Member] | Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	6,055	2,772
90 Days and Greater [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	569	585
90 Days and Greater [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	83
Past Due Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	49,996	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	10,967	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	9,863	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	1,036	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	1,988	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	6,459	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	2,212	487
Past Due Loans [Member] | Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,939	4,656
Past Due Loans [Member] | Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	10,778	7,404
Past Due Loans [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	3,781	3,824
Past Due Loans [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	973	654
Current Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	7,248,696	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	958,947	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	1,402,613	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	548,032	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	274,738	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	1,183,485	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	217,540	195,711
Current Loans [Member] | Real Estate [Member] | Agriculture [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	420,388	403,381
Current Loans [Member] | Commercial Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	1,339,011	1,234,050
Current Loans [Member] | Consumer Non-real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	454,116	442,932
Current Loans [Member] | Oil and Gas [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due Loans	$ 449,826	$ 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	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	$ 1,194,690
Fiscal year before current fiscal year	1,909,764
Two years before current fiscal year	1,219,236
Three years before current fiscal year	652,866
Four years before current fiscal year	481,891
Prior	731,150
Revolving Loans Amortized Cost Basis	1,109,095
Total loans	7,298,692	$ 6,943,563
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	98,384
Fiscal year before current fiscal year	216,473
Two years before current fiscal year	167,208
Three years before current fiscal year	122,093
Four years before current fiscal year	113,173
Prior	183,023
Revolving Loans Amortized Cost Basis	69,560
Total loans	969,914	908,494
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	75,514
Fiscal year before current fiscal year	174,029
Two years before current fiscal year	131,583
Three years before current fiscal year	96,065
Four years before current fiscal year	91,649
Prior	150,940
Revolving Loans Amortized Cost Basis	51,100
Total loans	770,880
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	22,851
Fiscal year before current fiscal year	42,130
Two years before current fiscal year	30,830
Three years before current fiscal year	24,524
Four years before current fiscal year	19,136
Prior	30,000
Revolving Loans Amortized Cost Basis	18,248
Total loans	187,719
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	19
Two years before current fiscal year	4,450
Three years before current fiscal year	1,193
Four years before current fiscal year	883
Prior	1,459
Revolving Loans Amortized Cost Basis	212
Total loans	8,216
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	314
Two years before current fiscal year	345
Three years before current fiscal year	311
Four years before current fiscal year	1,166
Prior	624
Total loans	2,760
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	161,432
Fiscal year before current fiscal year	440,472
Two years before current fiscal year	264,677
Three years before current fiscal year	193,077
Four years before current fiscal year	130,972
Prior	152,438
Revolving Loans Amortized Cost Basis	69,408
Total loans	1,412,476	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	116,433
Fiscal year before current fiscal year	324,990
Two years before current fiscal year	221,196
Three years before current fiscal year	159,511
Four years before current fiscal year	92,137
Prior	79,849
Revolving Loans Amortized Cost Basis	45,799
Total loans	1,039,915
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	44,955
Fiscal year before current fiscal year	107,929
Two years before current fiscal year	43,476
Three years before current fiscal year	33,416
Four years before current fiscal year	32,628
Prior	71,739
Revolving Loans Amortized Cost Basis	23,609
Total loans	357,752
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	6,733
Two years before current fiscal year	5
Three years before current fiscal year	150
Four years before current fiscal year	6,207
Prior	795
Total loans	13,890
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	44
Fiscal year before current fiscal year	820
Prior	55
Total loans	919
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	131,520
Fiscal year before current fiscal year	177,056
Two years before current fiscal year	93,232
Three years before current fiscal year	15,756
Four years before current fiscal year	18,606
Prior	8,947
Revolving Loans Amortized Cost Basis	103,951
Total loans	549,068	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	88,593
Fiscal year before current fiscal year	139,210
Two years before current fiscal year	77,235
Three years before current fiscal year	14,074
Four years before current fiscal year	4,622
Prior	6,522
Revolving Loans Amortized Cost Basis	70,118
Total loans	400,374
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	42,927
Fiscal year before current fiscal year	36,862
Two years before current fiscal year	15,894
Three years before current fiscal year	1,584
Four years before current fiscal year	13,984
Prior	2,418
Revolving Loans Amortized Cost Basis	33,679
Total loans	147,348
Real Estate [Member] | Construction and Development Less than 60 Months [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	903
Two years before current fiscal year	103
Three years before current fiscal year	98
Prior	7
Revolving Loans Amortized Cost Basis	154
Total loans	1,265
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	81
Total loans	81
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	132,782
Fiscal year before current fiscal year	107,361
Two years before current fiscal year	1,935
Three years before current fiscal year	279
Four years before current fiscal year	6
Prior	427
Revolving Loans Amortized Cost Basis	33,936
Total loans	276,726	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	106,520
Fiscal year before current fiscal year	80,355
Two years before current fiscal year	1,897
Three years before current fiscal year	257
Four years before current fiscal year	6
Prior	39
Revolving Loans Amortized Cost Basis	33,846
Total loans	222,920
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	25,787
Fiscal year before current fiscal year	26,221
Two years before current fiscal year	38
Three years before current fiscal year	22
Prior	388
Revolving Loans Amortized Cost Basis	90
Total loans	52,546
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	99
Fiscal year before current fiscal year	785
Total loans	884
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	376
Total loans	376
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	183,422
Fiscal year before current fiscal year	305,045
Two years before current fiscal year	229,114
Three years before current fiscal year	155,998
Four years before current fiscal year	93,784
Prior	218,860
Revolving Loans Amortized Cost Basis	3,721
Total loans	1,189,944	1,117,899
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	160,801
Fiscal year before current fiscal year	256,377
Two years before current fiscal year	189,258
Three years before current fiscal year	130,017
Four years before current fiscal year	78,783
Prior	168,639
Revolving Loans Amortized Cost Basis	3,721
Total loans	987,596
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	21,024
Fiscal year before current fiscal year	46,624
Two years before current fiscal year	35,716
Three years before current fiscal year	24,654
Four years before current fiscal year	12,691
Prior	44,160
Total loans	184,869
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	1,236
Fiscal year before current fiscal year	1,867
Two years before current fiscal year	2,959
Three years before current fiscal year	1,035
Four years before current fiscal year	1,664
Prior	3,926
Total loans	12,687
Real Estate [Member] | Residential Real Estate First Lien [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	361
Fiscal year before current fiscal year	177
Two years before current fiscal year	1,181
Three years before current fiscal year	292
Four years before current fiscal year	646
Prior	2,135
Total loans	4,792
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	28,193
Fiscal year before current fiscal year	33,637
Two years before current fiscal year	10,904
Three years before current fiscal year	11,272
Four years before current fiscal year	6,280
Prior	18,000
Revolving Loans Amortized Cost Basis	111,466
Total loans	219,752	196,198
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	25,642
Fiscal year before current fiscal year	28,209
Two years before current fiscal year	8,615
Three years before current fiscal year	9,218
Four years before current fiscal year	4,625
Prior	14,003
Revolving Loans Amortized Cost Basis	39,561
Total loans	129,873
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	2,380
Fiscal year before current fiscal year	4,982
Two years before current fiscal year	2,202
Three years before current fiscal year	1,983
Four years before current fiscal year	1,509
Prior	3,476
Revolving Loans Amortized Cost Basis	69,231
Total loans	85,763
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	171
Fiscal year before current fiscal year	422
Two years before current fiscal year	77
Three years before current fiscal year	45
Four years before current fiscal year	146
Prior	471
Revolving Loans Amortized Cost Basis	1,877
Total loans	3,209
Real Estate [Member] | Residential Real Estate All Other [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	24
Two years before current fiscal year	10
Three years before current fiscal year	26
Prior	50
Revolving Loans Amortized Cost Basis	797
Total loans	907
Real Estate [Member] | Agriculture [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	57,265
Fiscal year before current fiscal year	86,617
Two years before current fiscal year	60,452
Three years before current fiscal year	44,290
Four years before current fiscal year	29,009
Prior	58,734
Revolving Loans Amortized Cost Basis	85,960
Total loans	422,327	408,037
Real Estate [Member] | Agriculture [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	32,122
Fiscal year before current fiscal year	61,718
Two years before current fiscal year	39,267
Three years before current fiscal year	32,007
Four years before current fiscal year	18,986
Prior	36,796
Revolving Loans Amortized Cost Basis	39,208
Total loans	260,104
Real Estate [Member] | Agriculture [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	18,303
Fiscal year before current fiscal year	23,027
Two years before current fiscal year	19,601
Three years before current fiscal year	8,718
Four years before current fiscal year	9,835
Prior	17,869
Revolving Loans Amortized Cost Basis	43,466
Total loans	140,819
Real Estate [Member] | Agriculture [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	6,781
Fiscal year before current fiscal year	1,204
Two years before current fiscal year	1,527
Three years before current fiscal year	3,396
Four years before current fiscal year	144
Prior	3,815
Revolving Loans Amortized Cost Basis	3,255
Total loans	20,122
Real Estate [Member] | Agriculture [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	59
Fiscal year before current fiscal year	668
Two years before current fiscal year	57
Three years before current fiscal year	169
Four years before current fiscal year	44
Prior	254
Revolving Loans Amortized Cost Basis	31
Total loans	1,282
Commercial Non-real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	205,355
Fiscal year before current fiscal year	357,206
Two years before current fiscal year	206,628
Three years before current fiscal year	65,764
Four years before current fiscal year	54,353
Prior	66,412
Revolving Loans Amortized Cost Basis	394,071
Total loans	1,349,789	1,241,454
Commercial Non-real Estate [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	148,198
Fiscal year before current fiscal year	288,490
Two years before current fiscal year	176,959
Three years before current fiscal year	48,809
Four years before current fiscal year	42,278
Prior	43,672
Revolving Loans Amortized Cost Basis	293,889
Total loans	1,042,295
Commercial Non-real Estate [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	55,938
Fiscal year before current fiscal year	65,449
Two years before current fiscal year	28,746
Three years before current fiscal year	16,090
Four years before current fiscal year	10,820
Prior	21,080
Revolving Loans Amortized Cost Basis	96,657
Total loans	294,780
Commercial Non-real Estate [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	1,208
Fiscal year before current fiscal year	2,284
Two years before current fiscal year	575
Three years before current fiscal year	172
Four years before current fiscal year	619
Prior	1,381
Revolving Loans Amortized Cost Basis	2,491
Total loans	8,730
Commercial Non-real Estate [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	11
Fiscal year before current fiscal year	983
Two years before current fiscal year	348
Three years before current fiscal year	693
Four years before current fiscal year	372
Prior	279
Revolving Loans Amortized Cost Basis	1,034
Total loans	3,720
Commercial Non-real Estate [Member] | Grade 5 [Member]
Financing Receivable Recorded Investment [Line Items]
Four years before current fiscal year	264
Total loans	264
Consumer Non-real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	127,001
Fiscal year before current fiscal year	164,418
Two years before current fiscal year	85,847
Three years before current fiscal year	30,993
Four years before current fiscal year	14,965
Prior	6,681
Revolving Loans Amortized Cost Basis	27,992
Total loans	457,897	446,756
Consumer Non-real Estate [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	118,847
Fiscal year before current fiscal year	146,280
Two years before current fiscal year	76,246
Three years before current fiscal year	27,782
Four years before current fiscal year	13,664
Prior	4,737
Revolving Loans Amortized Cost Basis	26,330
Total loans	413,886
Consumer Non-real Estate [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	7,960
Fiscal year before current fiscal year	16,721
Two years before current fiscal year	8,236
Three years before current fiscal year	2,766
Four years before current fiscal year	971
Prior	1,804
Revolving Loans Amortized Cost Basis	1,642
Total loans	40,100
Consumer Non-real Estate [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	155
Fiscal year before current fiscal year	984
Two years before current fiscal year	1,013
Three years before current fiscal year	401
Four years before current fiscal year	245
Prior	115
Revolving Loans Amortized Cost Basis	16
Total loans	2,929
Consumer Non-real Estate [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	39
Fiscal year before current fiscal year	392
Two years before current fiscal year	352
Three years before current fiscal year	44
Four years before current fiscal year	85
Prior	25
Revolving Loans Amortized Cost Basis	4
Total loans	941
Consumer Non-real Estate [Member] | Grade 5 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	41
Total loans	41
Oil and Gas [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	69,336
Fiscal year before current fiscal year	21,479
Two years before current fiscal year	99,239
Three years before current fiscal year	13,344
Four years before current fiscal year	20,743
Prior	17,628
Revolving Loans Amortized Cost Basis	209,030
Total loans	450,799	$ 463,034
Oil and Gas [Member] | Grade 1 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	62,557
Fiscal year before current fiscal year	13,971
Two years before current fiscal year	96,748
Three years before current fiscal year	12,909
Four years before current fiscal year	2,273
Prior	17,373
Revolving Loans Amortized Cost Basis	159,813
Total loans	365,644
Oil and Gas [Member] | Grade 2 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	5,334
Two years before current fiscal year	2,251
Three years before current fiscal year	432
Prior	255
Revolving Loans Amortized Cost Basis	47,498
Total loans	81,019
Oil and Gas [Member] | Grade 3 [Member]
Financing Receivable Recorded Investment [Line Items]
Current fiscal year	6,779
Fiscal year before current fiscal year	2,091
Two years before current fiscal year	240
Three years before current fiscal year	3
Four years before current fiscal year	18,470
Revolving Loans Amortized Cost Basis	1,719
Total loans	4,053
Oil and Gas [Member] | Grade 4 [Member]
Financing Receivable Recorded Investment [Line Items]
Fiscal year before current fiscal year	83
Total loans	$ 83

XML

Loans Held for Investment and Allowance for Credit Losses on Loans - Gross Charges-offs by Year of Orgination (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year gross charge-offs	$ 71	$ 71
Fiscal year before current fiscal year gross charge-offs	224	382
Two years before current fiscal year gross charge-offs	135	249
Three years before current fiscal year gross charge-offs	358	411
Four years before current fiscal year gross charge-offs	29	70
Prior gross charge-offs	18	82
Revolving Loans Amortized Cost Basis gross charge-offs	15	17
Total current-period gross charge-offs	850	1,282
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Fiscal year before current fiscal year gross charge-offs		7
Two years before current fiscal year gross charge-offs		1
Three years before current fiscal year gross charge-offs		22
Four years before current fiscal year gross charge-offs		18
Total current-period gross charge-offs		48
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		2
Three years before current fiscal year gross charge-offs	2	2
Prior gross charge-offs
Total current-period gross charge-offs	2	4
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	19	19
Three years before current fiscal year gross charge-offs	21	21
Prior gross charge-offs	2	4
Total current-period gross charge-offs	42	44
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	2	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		4
Total current-period gross charge-offs	2	28
Real Estate [Member] | Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Fiscal year before current fiscal year gross charge-offs		4
Three years before current fiscal year gross charge-offs	301	317
Four years before current fiscal year gross charge-offs	1	14
Prior gross charge-offs		2
Total current-period gross charge-offs	302	337
Commercial Non-real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year gross charge-offs	42	42
Fiscal year before current fiscal year gross charge-offs	34	101
Two years before current fiscal year gross charge-offs	1	63
Three years before current fiscal year gross charge-offs	20	20
Prior gross charge-offs	5	52
Total current-period gross charge-offs	102	278
Consumer Non-real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year gross charge-offs	29	29
Fiscal year before current fiscal year gross charge-offs	186	262
Two years before current fiscal year gross charge-offs	115	147
Three years before current fiscal year gross charge-offs	14	29
Four years before current fiscal year gross charge-offs	28	37
Prior gross charge-offs	11	17
Revolving Loans Amortized Cost Basis gross charge-offs	15	17
Total current-period gross charge-offs	398	538
Oil and Gas [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Fiscal year before current fiscal year gross charge-offs	2	2
Total current-period gross charge-offs	$ 2	$ 2

XML

Loans Held for Investment and Allowance for Credit Losses on Loans - Activity in Allowance for Credit Losses on Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	$ 94,760	$ 87,239	$ 92,728	$ 83,936
Initial allowance on loans purchased with credit deterioration				78
Charge- offs	(850)	(915)	(1,282)	(1,237)
Recoveries	186	110	328	721
Net charge-offs	(664)	(805)	(954)	(516)
Provision for/(benefit from) credit losses	2,824	501	5,146	3,437
Balance at end of period	96,920	86,935	96,920	86,935
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	6,547	8,262	6,416	7,550
Charge- offs		(4)	(48)	(20)
Recoveries	3	30	52	78
Net charge-offs	3	26	4	58
Provision for/(benefit from) credit losses	258	(1,360)	388	(680)
Balance at end of period	6,808	6,928	6,808	6,928
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	32,120	16,348	30,190	16,807
Charge- offs			(3)
Net charge-offs			(3)
Provision for/(benefit from) credit losses	1,312	(33)	3,245	(492)
Balance at end of period	33,432	16,315	33,432	16,315
Real Estate [Member] | Construction and Development Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	3,608	3,272	3,778	3,454
Charge- offs	(2)		(4)
Recoveries	3	2	6	5
Net charge-offs	1	2	2	5
Provision for/(benefit from) credit losses	(169)	406	(340)	221
Balance at end of period	3,440	3,680	3,440	3,680
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	3,226	1,103	3,275	1,051
Provision for/(benefit from) credit losses	327	80	278	132
Balance at end of period	3,553	1,183	3,553	1,183
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	4,454	3,394	4,092	3,048
Initial allowance on loans purchased with credit deterioration				2
Charge- offs	(42)	(5)	(44)	(49)
Recoveries	10	6	13	13
Net charge-offs	(32)	1	(31)	(36)
Provision for/(benefit from) credit losses	333	(40)	694	341
Balance at end of period	4,755	3,355	4,755	3,355
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	1,444	1,560	1,418	1,567
Charge- offs	(2)	(36)	(28)	(36)
Recoveries	1		3	402
Net charge-offs	(1)	(36)	(25)	366
Provision for/(benefit from) credit losses	218	(44)	268	(453)
Balance at end of period	1,661	1,480	1,661	1,480
Commercial Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	25,079	25,163	25,106	25,565
Initial allowance on loans purchased with credit deterioration				48
Charge- offs	(102)	(717)	(278)	(774)
Recoveries	127	26	149	136
Net charge-offs	25	(691)	(129)	(638)
Provision for/(benefit from) credit losses	23	898	150	395
Balance at end of period	25,127	25,370	25,127	25,370
Consumer Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	4,232	3,730	4,132	3,694
Initial allowance on loans purchased with credit deterioration				28
Charge- offs	(398)	(153)	(538)	(233)
Recoveries	35	42	92	80
Net charge-offs	(363)	(111)	(446)	(153)
Provision for/(benefit from) credit losses	475	431	658	481
Balance at end of period	4,344	4,050	4,344	4,050
Oil and Gas [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	7,782	16,389	8,104	12,808
Charge- offs	(2)		(2)
Net charge-offs	(2)		(2)
Provision for/(benefit from) credit losses	(406)	229	(728)	3,810
Balance at end of period	7,374	16,618	7,374	16,618
Agriculture [Member] | Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	6,268	8,018	6,217	8,392
Charge- offs	(302)		(337)	(125)
Recoveries	7	4	13	7
Net charge-offs	(295)	4	(324)	(118)
Provision for/(benefit from) credit losses	453	(66)	533	(318)
Balance at end of period	$ 6,426	$ 7,956	$ 6,426	$ 7,956

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	6 Months Ended
	Jun. 30, 2022 USD ($)
Financing Receivable Allowance For Credit Losses [Line Items]
Purchase price of loans at acquisition	$ 661
Allowance for credit losses at acquisition	78
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	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	$ 15,729		$ 18,171
Specific Allocation	96,920	$ 94,760	92,728	$ 86,935	$ 87,239	$ 83,936
Real Estate Asset [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	7,017		7,833
Business Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	5,551		6,625
Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	3,161		3,713
Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	5,812		6,597
Real Estate [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	2,129		2,213
Specific Allocation	6,808	6,547	6,416	6,928	8,262	7,550
Real Estate [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	664		1,263
Specific Allocation	33,432	32,120	30,190	16,315	16,348	16,807
Real Estate [Member] | Construction Residential Real Estate Less than 60 Months [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	376		420
Specific Allocation	3,553	3,226	3,275	1,183	1,103	1,051
Real Estate [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	371		481
Specific Allocation	4,755	4,454	4,092	3,355	3,394	3,048
Real Estate [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	41		9
Specific Allocation	1,661	1,444	1,418	1,480	1,560	1,567
Real Estate [Member] | Agriculture [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	7,176		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	2,129		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	664		1,263
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	376		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	371		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	41		9
Real Estate [Member] | Real Estate Asset [Member] | Agriculture [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	3,436		3,447
Real Estate [Member] | Business Assets [Member] | Agriculture [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	672		701
Real Estate [Member] | Other Assets [Member] | Agriculture [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	3,068		3,592
Real Estate [Member] | Specific Allocation [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	863		870
Real Estate [Member] | Specific Allocation [Member] | Commercial Real Estate Non-Owner Occupied [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	270		333
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	45		45
Real Estate [Member] | Specific Allocation [Member] | Residential Real Estate First Lien [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	118		207
Real Estate [Member] | Specific Allocation [Member] | Residential Real Estate All Other [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	19		9
Real Estate [Member] | Specific Allocation [Member] | Agriculture [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	2,694		3,114
Commercial and Agricultural Non-Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans			5,928
Commercial and Agricultural Non-Real Estate [Member] | Business Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans			5,924
Commercial and Agricultural Non-Real Estate [Member] | Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans			4
Commercial and Agricultural Non-Real Estate [Member] | Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation			1,938
Commercial Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	4,879
Specific Allocation	25,127	25,079	25,106	25,370	25,163	25,565
Commercial Non-real Estate [Member] | Business Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	4,879
Commercial Non-real Estate [Member] | Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	1,747
Consumer Non-real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	93		117
Specific Allocation	4,344	$ 4,232	4,132	$ 4,050	$ 3,730	$ 3,694
Consumer Non-real Estate [Member] | Other Assets [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Collateral Dependent Loans	93		117
Consumer Non-real Estate [Member] | Specific Allocation [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Specific Allocation	$ 56		$ 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 and Repossessed Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Noncash Investing and Financing Items [Abstract]
Other real estate owned	$ 667	$ 4,065
Repossessed assets	946	503
Total	$ 1,613	$ 4,568

XML

Intangible Assets and Goodwill - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 36,648	$ 36,648
Accumulated Amortization	(18,425)	(16,665)
Net Carrying Amount	18,223	19,983
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,298	33,298
Accumulated Amortization	(15,316)	(13,615)
Net Carrying Amount	17,982	19,683
Customer Relationship Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,350	3,350
Accumulated Amortization	(3,109)	(3,050)
Net Carrying Amount	$ 241	$ 300

XML

Intangible Assets and Goodwill - Summary of Goodwill by Business Segment (Detail) $ in Thousands	Jun. 30, 2023 USD ($)
Goodwill [Line Items]
Balance at beginning of period	$ 182,055
Balance at beginning and end of period	182,055
BancFirst Metropolitan Banks [Member]
Goodwill [Line Items]
Balance at beginning and end of period	13,767
BancFirst Community Banks [Member]
Goodwill [Line Items]
Balance at beginning and end of period	61,212
Pegasus [Member]
Goodwill [Line Items]
Balance at beginning and end of period	68,855
Worthington [Member]
Goodwill [Line Items]
Balance at beginning and end of period	32,133
Other Financial Services [Member]
Goodwill [Line Items]
Balance at beginning and end of period	5,464
Executive, Operations & Support [Member]
Goodwill [Line Items]
Balance at beginning and end of period	$ 624

XML

Subordinated Debt - Additional Information (Detail) - USD ($)		1 Months Ended		6 Months Ended
	Jun. 17, 2021	Mar. 31, 2004	Feb. 29, 2004	Jun. 30, 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%

XML

Stock-Based Compensation - Additional Information (Detail) - USD ($)			6 Months Ended
	Jun. 01, 2023	May 25, 2023	Jun. 30, 2023	Jun. 30, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option granted			0
Net cash settlement for stock options, cost			$ 0	$ 0
Deferred board fees percentage for stock units accumulation			100.00%
RSU Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares for future grants		497,375
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") 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
Nonqualified Incentive Stock Option Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period in years			7 years
Nonqualified Incentive Stock Option Plan [Member] | Stock Option [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			4 years
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
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			22,252
Number of shares of common stock distributed			17,797	13,288

XML

Stock-Based Compensation - Summary of Activity Under Stock Option Plan (Detail) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares
Share-Based Payment Arrangement [Abstract]
Outstanding at beginning period - Options | shares	1,310,290
Options exercised | shares	(45,899)
Options canceled, forfeited, or expired | shares	(8,500)
Outstanding at ending period - Options | shares	1,255,891
Exercisable at ending period - Options | shares	477,266
Outstanding at beginning period - Wgtd. Avg. Exercise Price | $ / shares	$ 52.51
Options exercised - Wgtd. Avg. Exercise Price | $ / shares	33.54
Options cancelled, forfeited, or expired - Wgtd. Avg. Exercise Price | $ / shares	87.97
Outstanding at ending period - Wgtd. Avg. Exercise Price | $ / shares	52.96
Exercisable at ending period - Wgtd. Avg. Exercise Price | $ / shares	$ 31.74
Outstanding at ending period - Wgtd. Avg. Remaining Contractual Term, years	10 years 2 months 4 days
Exercisable at ending period - Wgtd. Avg. Remaining Contractual Term, years	6 years 4 months 28 days
Outstanding at ending period - Aggregate Intrinsic Value | $	$ 49,029
Exercisable at ending period - Aggregate Intrinsic Value | $	$ 28,760

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Stock-Based Compensation - Options Exercised Under Stock Option Plan (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract]
Total intrinsic value of options exercised	$ 1,979	$ 2,979	$ 2,331	$ 8,943
Cash received from options exercised	1,318	1,303	1,539	4,292
Tax benefit realized from options exercised	$ 475	$ 716	$ 560	$ 2,150

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Stock-Based Compensation - Assumptions Used for Computing Stock-Based Compensation Expense (Detail)	6 Months Ended
	Jun. 30, 2022 $ / shares
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	$ 29.08
Risk-free interest rate, minimum	1.75%
Risk-free interest rate, maximum	3.25%
Dividend yield	2.00%
Stock price volatility, minimum	34.61%
Stock price volatility, maximum	34.71%
Expected term	10 years

XML

Stock-Based Compensation - Summary of Activity Under RSU Plan (Details)	6 Months Ended
	Jun. 30, 2023 $ / shares shares
Share-Based Payment Arrangement [Abstract]
Restricted Stock Units, Granted	2,625
Restricted Stock Units, Nonvested Ending Balance	2,625
Weightage Average Grant Date Fair Value, Granted | $ / shares	$ 93.66

XML

Stock-Based Compensation - Summary of Accumulated Stock Units (Detail) - $ / shares	Jun. 30, 2023	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Accumulated stock units	115,848	129,609
Average price	$ 38.26	$ 34.91

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Stock-Based Compensation - Stock-Based Employee Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement Compensation Expense Items [Abstract]
Stock-based compensation expense	$ 831	$ 460	$ 1,213	$ 918
Tax benefit	200	111	292	221
Stock-based compensation expense, net of tax	$ 631	$ 349	$ 921	$ 697

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Stock-Based Compensation - Unearned Stock-based Compensation Expense (Detail) $ in Thousands	Jun. 30, 2023 USD ($)
Share-Based Payment Arrangement, Noncash Expense [Abstract]
Unearned stock-based compensation expense	$ 11,867

XML

Stockholders' Equity - Additional Information (Detail)	Jun. 30, 2023 USD ($)
Maximum [Member]
Stockholders Equity [Line Items]
Quantitative limit for trust preferred securities to be included in tier 1 capital	$ 15,000,000,000

XML

Stockholders' Equity - Summary of Shares Repurchased Under Stock Purchase Program (Detail)	Jun. 30, 2023 shares
Summary Of Shares Repurchased Under Stock Purchase Program [Abstract]
Shares remaining to be repurchased	500,486

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Stockholders' Equity - Required Capital Amounts and Company's Respective Ratios (Detail) $ in Thousands	Jun. 30, 2023 USD ($)
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 1,393,706
Total Capital To Risk Weighted Assets Actual Ratio	0.1681
Capital Required For Capital Adequacy Amount	$ 663,195
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.0800
Capital With Capital Conservation Buffer Amount	$ 870,444
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.1050
Common Equity Tier 1 Risk Based Capital Amount	$ 1,211,518
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1461
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 373,047
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0450
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 580,296
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0700
Tier 1 Risk Based Capital Amount	$ 1,237,518
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1493
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 497,396
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0600
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 704,645
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0850
Tier 1 Capital Amount	$ 1,237,518
Tier 1 Capital To Quarterly Average Assets Ratio	0.1050
Tier 1 Capital Required For Capital Adequacy Amount	$ 471,255
Tier 1 Capital Required For Capital Adequacy To Quartely Average Assets Ratio	0.0400
BancFirst [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 1,160,255
Total Capital To Risk Weighted Assets Actual Ratio	0.1623
Capital Required For Capital Adequacy Amount	$ 571,919
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.0800
Capital With Capital Conservation Buffer Amount	$ 750,644
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.1050
Capital Required To Be Well Capitalized Amount	$ 714,899
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.1000
Common Equity Tier 1 Risk Based Capital Amount	$ 1,054,783
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1475
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 321,705
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0450
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 500,429
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0700
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 464,684
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0650
Tier 1 Risk Based Capital Amount	$ 1,074,783
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1503
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 428,940
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0600
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 607,664
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0850
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 571,919
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0800
Tier 1 Capital Amount	$ 1,074,783
Tier 1 Capital To Quarterly Average Assets Ratio	0.1063
Tier 1 Capital Required For Capital Adequacy Amount	$ 401,047
Tier 1 Capital Required For Capital Adequacy To Quartely Average Assets Ratio	0.0400
Tier 1 Capital Required To Be Well Capitalized Amount	$ 501,309
Tier 1 Capital Required To Be Well Capitalized To Quartely Average Assets Ratio	0.0500
Pegasus [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 138,455
Total Capital To Risk Weighted Assets Actual Ratio	0.1762
Capital Required For Capital Adequacy Amount	$ 62,861
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.0800
Capital With Capital Conservation Buffer Amount	$ 82,505
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.1050
Capital Required To Be Well Capitalized Amount	$ 78,576
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.1000
Common Equity Tier 1 Risk Based Capital Amount	$ 130,150
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1656
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 35,359
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0450
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 55,003
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0700
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 51,074
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0650
Tier 1 Risk Based Capital Amount	$ 130,150
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1656
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 47,145
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0600
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 66,789
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0850
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 62,861
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0800
Tier 1 Capital Amount	$ 130,150
Tier 1 Capital To Quarterly Average Assets Ratio	0.1041
Tier 1 Capital Required For Capital Adequacy Amount	$ 50,026
Tier 1 Capital Required For Capital Adequacy To Quartely Average Assets Ratio	0.0400
Tier 1 Capital Required To Be Well Capitalized Amount	$ 62,532
Tier 1 Capital Required To Be Well Capitalized To Quartely Average Assets Ratio	0.0500
Worthington [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital Amount	$ 49,963
Total Capital To Risk Weighted Assets Actual Ratio	0.1330
Capital Required For Capital Adequacy Amount	$ 30,055
Capital Required For Capital Adequacy to Risk Weighted Assets Ratio	0.0800
Capital With Capital Conservation Buffer Amount	$ 39,447
Capital With Capital Conservation To Risk Based Weighted Assets Buffer Ratio	0.1050
Capital Required To Be Well Capitalized Amount	$ 37,568
Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.1000
Common Equity Tier 1 Risk Based Capital Amount	$ 46,200
Common Equity Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1230
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 16,906
Common Equity Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0450
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 26,698
Common Equity Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0700
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 24,419
Common Equity Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0650
Tier 1 Risk Based Capital Amount	$ 46,200
Tier 1 Risk Based Capital To Risk Weighted Assets Ratio	0.1230
Tier 1 Risk Based Capital Required For Capital Adequacy Amount	$ 22,541
Tier 1 Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets Ratio	0.0600
Tier 1 Risk Based Capital With Capital Conservation Buffer Amount	$ 31,933
Tier 1 Risk Based Capital With Capital Conservation Buffer To Risk Weighted Assets Ratio	0.0850
Tier 1 Risk Based Capital Required To Be Well Capitalized Amount	$ 30,055
Tier 1 Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets Ratio	0.0800
Tier 1 Capital Amount	$ 46,200
Tier 1 Capital To Quarterly Average Assets Ratio	0.0918
Tier 1 Capital Required For Capital Adequacy Amount	$ 20,136
Tier 1 Capital Required For Capital Adequacy To Quartely Average Assets Ratio	0.0400
Tier 1 Capital Required To Be Well Capitalized Amount	$ 25,171
Tier 1 Capital Required To Be Well Capitalized To Quartely Average Assets Ratio	0.0500

XML

Net Income Per Common Share - Basic and Diluted Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share Reconciliation [Abstract]
Income available to common stockholders	$ 55,010	$ 44,707	$ 112,543	$ 80,622
Income available to common stockholders plus assumed exercises of stock options	$ 55,010	$ 44,707	$ 112,543	$ 80,622
Income available to common stockholders - Shares	32,920,497	32,749,752	32,906,753	32,708,563
Dilutive effect of stock options - Shares	546,757	668,730	559,178	658,236
Income available to common stockholders plus assumed exercises of stock options - Shares	33,467,254	33,418,482	33,465,931	33,366,799
Income available to common stockholders - Per Share Amount	$ 1.67	$ 1.36	$ 3.42	$ 2.46
Income available to common stockholders plus assumed exercises of stock options - Per Share Amount	$ 1.64	$ 1.34	$ 3.36	$ 2.42

XML

Net Income Per Common Share - Average Exercise Prices of Options Excluded from Computation of Diluted Net Income Per Common Share (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Abstract]
Shares	305,407	122,489	307,608	131,779

XML

Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	$ 1,569,427	$ 1,538,221
Derivative assets	$ 23,340	$ 20,745
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Interest Receivable and Other Assets	Interest Receivable and Other Assets
Derivative liabilities	$ 21,813	$ 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	$ 1,510,066	$ 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	13,536	15,222
Mortgage Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	15,620	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	10,886	8,134
Asset backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	12,435	13,010
Other Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities available for sale	6,884	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	1,510,066	1,477,864
Level 2 Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	23,340	20,745
Derivative liabilities	21,813	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	13,536	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	15,620	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	10,459	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	12,435	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	6,884	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	$ 427	$ 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	6 Months Ended	12 Months Ended
	Jun. 30, 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
Purchases		255
Settlements	(30)	(110)
Total unrealized gain	$ 3	$ (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	OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
Balance at the end of the period	$ 427	$ 454

XML

Fair Value Measurements - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Level 3 [Member] - Nonrecurring [Member] - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Equity Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	$ 15,172	$ 15,512
Collateral Dependent Loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	122	1,618
Repossessed Assets [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	320	180
Other Real Estate Owned [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Fair Value	$ 5,100	$ 34,999

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Fair Value Measurements - Additional Information (Detail) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 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 - Estimated Fair Values of Company's Financial Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
FINANCIAL ASSETS
Federal funds sold, Carrying Amount	$ 4,481	$ 2,850
Debt securities held for investment, Carrying Amount	1,193	2,383
Loans, net of allowance for credit losses, Carrying Amount	7,201,772	6,850,835
Debt securities held for investment, Fair Value	1,193	2,383
Loans held for sale, Fair Value	8,783	6,232
FINANCIAL LIABILITIES
Deposits, Carrying Amount	10,475,180	10,974,228
Short-term borrowings, Carrying Amount	3,893	300
Subordinated debt, Carrying Amount	86,072	86,044
OFF-BALANCE SHEET FINANCIAL INSTRUMENTS
Loan commitments, Fair Value	4,938	4,598
Letters of credit, Fair Value	530	542
Level 2 Inputs [Member]
FINANCIAL ASSETS
Cash and cash equivalents, Carrying Amount	2,409,142	3,168,910
Federal funds sold, Carrying Amount	4,481	2,850
Debt securities held for investment, Carrying Amount	8	13
Loans held for sale, Carrying Amount	8,783	6,232
Cash and cash equivalents, Fair Value	2,409,142	3,168,910
Federal funds sold, Fair Value	4,481	2,850
Debt securities held for investment, Fair Value	8	13
Loans held for sale, Fair Value	8,783	6,232
FINANCIAL LIABILITIES
Deposits, Carrying Amount	10,475,180	10,974,228
Short-term borrowings, Carrying Amount	3,893	300
Subordinated debt, Carrying Amount	86,072	86,044
Deposits, Fair Value	10,096,793	10,614,840
Short-term borrowings, Fair Value	3,893	300
Subordinated debt, Fair Value	79,834	82,385
Level 3 Inputs [Member]
FINANCIAL ASSETS
Debt securities held for investment, Carrying Amount	1,185	2,370
Loans, net of allowance for credit losses, Carrying Amount	7,201,772	6,850,835
Debt securities held for investment, Fair Value	1,185	2,370
Loans, net of allowance for credit losses, Fair Value	$ 6,915,262	$ 6,563,755

XML

Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 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 margin amount		$ 6.6
Other Liabilities [Member] | Oil and Gas Reserves [Member]
Derivative [Line Items]
Derivative instrument margin amount	$ 5.5

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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	Jun. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Derivative assets, Estimated Fair Value	$ 23,340	$ 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	$ (21,813)	$ (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	$ 23,340	$ 20,745
Derivative liabilities, Estimated Fair Value	(21,813)	(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	2,416	2,698
Derivative liabilities, Notional Amount	(2,416)	(2,698)
Derivative assets, Estimated Fair Value	11,057	8,868
Derivative liabilities, Estimated Fair Value	(10,460)	(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	53,649	25,059
Derivative liabilities, Notional Amount	(53,649)	(25,059)
Derivative assets, Estimated Fair Value	12,283	11,877
Derivative liabilities, Estimated Fair Value	$ (11,353)	$ (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	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
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	Noninterest Income, Other
Oil and Natural Gas Swaps and Options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative income	$ 260	$ 189	$ 349	$ 348

XML

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	Jun. 30, 2023	Dec. 31, 2022
Oil and Natural Gas Swaps and Options [Member]
Credit Derivatives [Line Items]
Credit exposure	$ 21,093	$ 6,560

XML

Segment Information - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2023 Business_Unit
Segment Reporting [Abstract]
Number of principal business units	6

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Segment Information - Results of Operations and Selected Financial Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net interest income	$ 105,926	$ 86,867	$ 215,082	$ 162,374
Noninterest income	47,974	42,598	95,802	86,248
Income before taxes	69,966	55,247	144,311	98,956
Total assets	12,020,265		12,020,265		$ 12,387,863
Operating Segments [Member] | BancFirst Metropolitan Banks [Member]
Segment Reporting Information [Line Items]
Net interest income	29,269	21,962	60,008	41,570
Noninterest income	7,090	5,504	13,177	15,277
Income before taxes	21,588	15,142	44,898	33,313
Total assets	3,436,504		3,436,504		3,412,369
Operating Segments [Member] | BancFirst Community Banks [Member]
Segment Reporting Information [Line Items]
Net interest income	57,617	49,615	115,302	94,183
Noninterest income	19,986	18,152	39,518	34,997
Income before taxes	43,184	36,462	86,783	67,801
Total assets	6,810,321		6,810,321		6,886,066
Operating Segments [Member] | Pegasus [Member]
Segment Reporting Information [Line Items]
Net interest income	13,509	9,964	28,660	17,584
Noninterest income	467	293	681	484
Income before taxes	9,857	4,672	19,501	7,499
Total assets	1,276,354		1,276,354		1,404,033
Operating Segments [Member] | Worthington [Member]
Segment Reporting Information [Line Items]
Net interest income	4,123	3,743	8,747	5,437
Noninterest income	255	286	534	419
Income before taxes	791	1,436	2,421	1,821
Total assets	542,292		542,292		541,002
Operating Segments [Member] | Other Financial Services [Member]
Segment Reporting Information [Line Items]
Net interest income	1,058	2,079	2,000	4,992
Noninterest income	12,350	10,753	26,522	23,736
Income before taxes	4,298	4,643	10,462	10,688
Total assets	241,921		241,921		171,679
Operating Segments [Member] | Executive, Operations & Support [Member]
Segment Reporting Information [Line Items]
Net interest income	350	(505)	365	(1,412)
Noninterest income	63,688	52,756	129,831	95,330
Income before taxes	45,925	37,901	94,342	61,549
Total assets	1,217,957		1,217,957		1,473,443
Eliminations [Member]
Segment Reporting Information [Line Items]
Net interest income		9		20
Noninterest income	(55,862)	(45,146)	(114,461)	(83,995)
Income before taxes	(55,677)	$ (45,009)	(114,096)	$ (83,715)
Total assets	$ (1,505,084)		$ (1,505,084)		$ (1,500,729)