10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended September 30, 2018

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: 001-38484

Spirit of Texas Bancshares, Inc.

(Exact name of registrant as specified in its charter)

Texas	90-0499552
( State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1836 Spirit of Texas Way Conroe, TX	77301
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (936) 521-1836

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 (§ 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, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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

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

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

As of November 1, 2018, the registrant had 9,812,481 shares of common stock, no par value, outstanding.

TABLE OF CONTENTS

		Page
PART I.	FINANCIAL INFORMATION	3
Item 1.	Consolidated Financial Statements (Unaudited)	3
	Consolidated Balance Sheets	3
	Consolidated Statements of Income	4
	Consolidated Statements of Comprehensive Income	5
	Consolidated Statements of Changes in Stockholders’ Equity	6
	Consolidated Statements of Cash Flows	7
	Notes to Unaudited Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	30
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	57
Item 4.	Controls and Procedures	57
PART II.	OTHER INFORMATION	58
Item 1.	Legal Proceedings	58
Item 1A.	Risk Factors	58
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	58
Item 3.	Defaults Upon Senior Securities	58
Item 4.	Mine Safety Disclosures	58
Item 5.	Other Information	58
Item 6.	Exhibits	59
Signatures		60

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PART I.     FINANCIAL INFORMATION

Item 1.Consolidated Financial Statements (Unaudited)

SPIRIT OF TEXAS BANCSHARES, INC. AND SUBSIDIARY

CONSOLIDATED BALANCE SHEETS

(Unaudited)

(Dollars in thousands, except per share data)

	September 30, 2018			December 31, 2017
Assets:
Cash and due from banks	$	18,212		$	19,054
Interest-bearing deposits in other banks		25,926			38,895
Total cash and cash equivalents		44,138			57,949
Time deposits in other banks		245			245
Investment securities:
Available for sale securities, at fair value		33,449			37,243
Total investment securities		33,449			37,243
Loans held for sale		5,500			3,814
Loans:
Loans held for investment		954,074			869,119
Less: allowance for loan and lease losses		(6,156	)		(5,652	)
Loans, net		947,918			863,467
Premises and equipment, net		46,135			42,189
Accrued interest receivable		3,715			3,466
Other real estate owned and repossessed assets		289			21
Goodwill		4,485			4,485
Core deposit intangible		2,959			3,486
SBA servicing asset		3,561			3,411
Deferred tax asset, net		1,667			1,480
Bank-owned life insurance		483			479
Federal Home Loan Bank and other bank stock, at cost		4,861			4,812
Other assets		2,806			3,751
Total assets	$	1,102,211		$	1,030,298
Liabilities and Stockholders' Equity
Liabilities:
Deposits:
Transaction accounts:
Noninterest-bearing	$	207,727		$	176,726
Interest-bearing		222,245			250,491
Total transaction accounts		429,972			427,217
Time deposits		442,638			408,151
Total deposits		872,610			835,368
Accrued interest payable		475			407
Short-term borrowings		10,000			15,000
Long-term borrowings		64,961			76,411
Other liabilities		3,272			3,973
Total liabilities		951,318			931,159
Commitments and contingencies (Note 11)
Stockholders' Equity:
Preferred stock, $1 par value; 5 million shares authorized; 0 shares    issued and outstanding		—			—
Common stock, no par value; 50 million shares authorized; 9,812,481 and    7,280,183 shares issued and outstanding		127,541			82,615
Retained earnings		24,490			17,025
Accumulated other comprehensive income (loss)		(1,138	)		(501	)
Total stockholders' equity		150,893			99,139
Total liabilities and stockholders' equity	$	1,102,211		$	1,030,298

The accompanying notes are an integral part of these unaudited, consolidated financial statements

3

SPIRIT OF TEXAS BANCSHARES, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

(Dollars in thousands, except per share data)

	Three Months Ended September 30,					Nine Months Ended September 30,
	2018		2017			2018			2017
Interest income:
Interest and fees on loans	$	13,901	$	11,842		$	39,270		$	33,515
Interest and dividends on investment securities		202		202			611			316
Other interest income		173		200			536			784
Total interest income		14,276		12,244			40,417			34,615
Interest expense:
Interest on deposits		2,197		1,684			5,869			4,913
Interest on FHLB advances and other borrowings		389		405			1,395			1,180
Total interest expense		2,586		2,089			7,264			6,093
Net interest income		11,690		10,155			33,153			28,522
Provision for loan losses		486		604			1,460			1,804
Net interest income after provision for loan losses		11,204		9,551			31,693			26,718
Noninterest income:
Service charges and fees		462		362			1,238			1,095
SBA loan servicing fees		529		207			1,701			1,378
Mortgage referral fees		160		158			524			531
Gain on sales of loans, net		1,369		1,392			3,884			4,710
Gain (loss) on sales of other assets		-		(70	)		(25	)		(47	)
Other noninterest income		47		44			136			55
Total noninterest income		2,567		2,093			7,458			7,722
Noninterest expense:
Salaries and employee benefits		6,623		5,271			19,524			17,774
Occupancy and equipment expenses		1,279		1,239			3,736			3,742
Loan and other real estate related expenses		94		20			171			244
Professional services		624		410			1,249			1,159
Data processing and network		302		317			936			899
Regulatory assessments and insurance		266		221			787			689
Amortization of intangibles		176		176			527			527
Advertising		83		147			300			431
Marketing		115		118			354			399
Telephone expense		120		109			332			325
Other operating expenses		599		511			1,872			1,754
Total noninterest expense		10,281		8,539			29,788			27,943
Income before income tax expense		3,490		3,105			9,363			6,497
Income tax expense		719		1,103			1,898			2,267
Net income	$	2,771	$	2,002		$	7,465		$	4,230
Earnings per common share:
Basic	$	0.28	$	0.28		$	0.86		$	0.58
Diluted	$	0.27	$	0.26		$	0.82		$	0.56
Weighted average common shares outstanding:
Basic		9,792,032		7,279,178			8,673,106			7,218,147
Diluted		10,360,301		7,565,239			9,094,691			7,504,208

The accompanying notes are an integral part of these unaudited, consolidated financial statements

4

SPIRIT OF TEXAS BANCSHARES, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

(Dollars in thousands)

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
Net income	$	2,771		$	2,002		$	7,465		$	4,230
Other comprehensive income (loss):
Unrealized net holding gains (losses) on investment securities available for sale, net of    taxes of $16, $13, $169 and $79, respectively		(61	)		(25	)		(637	)		(153	)
Reclassification adjustment for realized (gains) losses on investment securities available    for sale included in net income, net of taxes of $0, $0, $0 and $0, respectively		—			—			—			—
Total other comprehensive income (loss)		(61	)		(25	)		(637	)		(153	)
Total comprehensive income	$	2,710		$	1,977		$	6,828		$	4,077

The accompanying notes are an integral part of these unaudited, consolidated financial statements

5

SPIRIT OF TEXAS BANCSHARES, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

(Unaudited)

(Dollars in thousands)

	Shares of Common		Shares of Preferred			Common		Preferred			Retained		Accumulated Other Comprehensive			Total Stockholders'
	Stock		Stock			Stock		Stock			Earnings		Income (Loss)			Equity
Balance as of January 1, 2017		7,069,527		170,236		$	78,871	$	1,753		$	12,272	$	—		$	92,896
Net income		—		—			—		—			4,230		—			4,230
Conversion of preferred stock		170,236		(170,236	)		1,753		(1,753	)		—		—			—
Exercise of stock options and warrants		40,419		—			471		—			—		—			471
Issuance of common stock		1		—			—		—			—		—			—
Stock-based compensation		—		—			1,361		—			—		—			1,361
Other comprehensive income (loss)		—		—			—		—			—		(153	)		(153	)
Balance as of September 30, 2017		7,280,183		—		$	82,456	$	—		$	16,502	$	(153	)	$	98,805
Balance as of January 1, 2018		7,280,183		—		$	82,615	$	—		$	17,025	$	(501	)	$	99,139
Net income		—		—			—		—			7,465		—			7,465
Shares issued in offering, net		2,300,000		—			42,058		—			—		—			42,058
Exercise of stock options and warrants		232,298		—			2,362		—			—		—			2,362
Stock-based compensation		—		—			506		—			—		—			506
Other comprehensive income (loss)		—		—			—		—			—		(637	)		(637	)
Balance as of September 30, 2018		9,812,481		—		$	127,541	$	—		$	24,490	$	(1,138	)	$	150,893

The accompanying notes are an integral part of these unaudited, consolidated financial statements

6

SPIRIT OF TEXAS BANCSHARES, INC. AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(Dollars in thousands)

	Nine Months Ended September 30,
	2018			2017
Cash Flows From Operating Activities:
Net income	$	7,465		$	4,230
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for loan losses		1,460			1,804
Depreciation and amortization		1,410			1,320
Net amortization (accretion) of premium (discount) on investment securities		234			140
Amortization of intangible assets		527			527
Accretion of discount on retained SBA loans		(672	)		(1,219	)
Deferred tax expense (benefit)		(18	)		(683	)
Originations of loans held for sale		(50,963	)		(55,206	)
Proceeds from loans held for sale		53,152			60,335
Net gains on sale of loans held for sale		(3,884	)		(4,710	)
(Gain) loss on sale of other real estate owned		11			(2	)
Fair value adjustment on SBA servicing asset		805			770
Stock-based compensation		506			1,361
Increase in cash surrender value of BOLI		(4	)		(2	)
Net change in operating assets and liabilities:
Net change in accrued interest receivable		(249	)		(452	)
Net change in accrued interest payable		68			93
Net change in other assets		945			835
Net change in other liabilities		(701	)		(971	)
Net cash provided by (used in) operating activities		10,092			8,170
Cash Flows From Investing Activities:
Purchase of investment securities available for sale		—			(40,419	)
Paydown and maturities of investment securities available for sale		2,754			1,219
Net purchase of FHLB and other bank stock		(49	)		(47	)
Proceeds from the sale of loans held for investment		1,451			—
Net change in loans		(87,937	)		(91,800	)
Proceeds from the sale of other real estate owned		22			499
Purchase of premises and equipment		(5,356	)		(7,709	)
Proceeds from the sale of premises and equipment		—			55
Net cash provided by (used in) investing activities		(89,115	)		(138,202	)
Cash Flows From Financing Activities:
Net change in deposits		37,242			28,705
Proceeds from long-term borrowings		—			16,762
Repayment of long-term borrowings		(11,450	)		(4,956	)
Proceeds from short-term borrowings		10,000			10,000
Repayment of short-term borrowings		(15,000	)		(10,000	)
Shares issued in offering, net		42,058			—
Exercise of stock options and warrants		2,362			471
Net cash provided by (used in) financing activities		65,212			40,982
Net Change in Cash and Cash Equivalents		(13,811	)		(89,050	)
Cash and Cash Equivalents at Beginning of Period		57,949			152,232
Cash and Cash Equivalents at End of Period	$	44,138		$	63,182
Supplemental Disclosures of Cash Flow Information:
Interest paid	$	5,802		$	4,820
Income taxes paid		2,850			1,695
Supplemental disclosure of noncash investing and financing activities:
Transfer of loans to other real estate owned and repossessed assets	$	301		$	450

The accompanying notes are an integral part of these unaudited, consolidated financial statements

7

SPIRIT OF TEXAS BANCSHARES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

Spirit of Texas Bancshares, Inc. (the “Holding Company” or “Company”) is a bank holding company headquartered in Conroe, Texas that provides, through its bank subsidiary, a variety of financial services to individuals and corporate customers in Texas, which are primarily agricultural, light industrial and commercial areas.

On March 16, 2017, the Company filed a Second Amended and Restated Certificate of Formation with the Texas Secretary of State to affect a reverse stock split of its outstanding common stock which became effective on March 16, 2017. As a result of the reverse stock split, every two shares of the Company’s issued and outstanding common stock were consolidated into one issued and outstanding share of common stock. The computations of all share and per share amounts in this Quarterly Report on Form 10-Q (this “Form 10-Q”) have been adjusted retroactively to reflect the reverse stock split.

The Company consummated the underwritten initial public offering of its common stock in May 2018. In connection with the initial public offering, the Company issued and sold 2,300,000 shares of its common stock, including 300,000 shares of common stock sold pursuant to the underwriters’ full exercise of their option to purchase additional shares, at an offering price of $21.00 per share, for aggregate gross proceeds of $48.3 million before deducting underwriting discounts and offering expenses, and aggregate net proceeds of $42.1 million after deducting underwriting discounts and offering expenses.

Basis of Presentation

The consolidated financial statements include the accounts of the Holding Company and the accounts of its wholly-owned subsidiary, Spirit of Texas Bank SSB (the “Bank”).  All significant intercompany balances and transactions have been eliminated in consolidation.  

The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and Article 8 of Regulation S-X.  Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. Operating results for the period ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018 and should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2017 included in our prospectus filed with the Securities and Exchange Commission (“SEC”) pursuant to Rule 424(b) of the Securities Act of 1933, as amended, on May 4, 2018, related to our initial public offering.

In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for the fair presentation of these consolidated financial statements have been included.  The preparation of financial statements in conformity with these accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and income and expense during the reporting periods and the related disclosures.  Although management’s estimates and assumptions are based on current expectations, estimates, forecasts and projections about future performance of the Company, such estimates and assumptions are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult for the Company to assess. 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.

Accounting Policies Recently Adopted and Pending Accounting Pronouncements

Accounting Standards Update (ASU) 2018-15, “Intangibles – Goodwill and Other – Internal Use Software – Issued in August 2018, ASU No. 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software.  The amendments of ASU 2018-15 are effective for public entities for interim and annual periods beginning after December 15, 2019 and for other entities for periods beginning after December 15, 2020.  Management will early adopt ASU 2018-15 as of January 1, 2019 as early adoption is permitted and is currently evaluating the impact the ASU will have on the consolidated financial statements.

ASU 2018-13, “Fair Value Measurement Disclosure Framework” – Issued in August 2018, ASU No. 2018-13 modifies the disclosure requirements on fair value measurements outlined in Topic 820, Fair Value Measurements.  Specifically the amendments in the ASU remove the requirements to disclose the amount and reasons for transfers between fair value hierarchy levels, the policy for timing of transfers between levels, the valuation processes for Level 3 fair value measurements, and for nonpublic entities, disclosure of the changes in unrealized gains and losses for the period included in earnings for recurring Level 3 fair value measurements.  

8

Additionally, the ASU adds disclosure requirements regarding changes in unrealized gains and losses for the period included in other comprehensive income related to Level 3 fair value measurements, and disclosure of the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements.  The amendments of ASU 2018-13 are effective for all entities for interim and annual periods beginning after December 15, 2019.  Management will adopt the provisions of this ASU removing fair value disclosure requirements as of December 31, 2018 as early adoption of the removal provisions is allowed and will adopt the remaining provisions of the ASU as of the effective date.

ASU 2018-09, “Codification Improvements.”  Issued in July 2018, ASU No. 2018-09 makes changes to a variety of topics to clarify, correct errors in, or make minor improvements to the Accounting Standards Codification. The majority of the amendments in ASU 2018-09 will be effective in annual periods beginning after December 15, 2018. Management is currently evaluating the effects the adoption of ASU 2018-09 will have on the consolidated financial statements, results of operations and cash flows.

ASU 2018-07, “Compensation-Stock Compensation.” Issued in June 2018, ASU 2018-07 expands the scope of ASC 718 to include share-based payment transactions for acquiring goods and services from nonemployees.  The amendments also clarify that ASC 718 does not apply to share-based payments used to provide either financing to the issuer or awards granted in conjunction with selling goods or services to customers under a contract subject to ASC 606, Revenue from Contracts with Customers.  The amendments of ASU 2018-07 are effective for public entities for interim and annual periods beginning after December 15, 2018 and for other entities for periods beginning after December 15, 2019.  Management will adopt ASU 2018-07 using the public company effective date as early adoption is permitted and is currently evaluating the impact the ASU will have on the consolidated financial statements.

ASU 2017-08, “Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities.”  Issued in March 2017, ASU 2017-08 amends the amortization period for certain purchased callable debt securities held at a premium.  In particular, the amendments in ASU 2017-08 require the premium to be amortized to the earliest call date. The amendments do not, however, require an accounting change for securities held at a discount; instead, the discount continues to be amortized to maturity.  Notably, the amendments in this ASU more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities.  Securities within the scope of ASU 2017-08 are purchased debt securities that have explicit, non-contingent call features that are callable at fixed prices and on preset dates.  The amendments of ASU 2017-08 become effective for public entities for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018 and for other entities for periods beginning after December 15, 2019.    Management will adopt this ASU using the public company effective date as early adoption is permitted and is currently evaluating the impact this ASU will have on the consolidated financial statements; however, the adoption of ASU 2017-08 is not expected to have a material impact on the Company’s consolidated financial statements.

ASU 2017-04, “Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.”  Issued in January 2017, ASU 2017-04 simplifies the manner in which an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test.  Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill.  In computing the implied fair value of goodwill under Step 2, an entity, prior to the amendments in ASU 2017-04, had to perform procedures to determine the fair value at the impairment testing date of its assets and liabilities, including unrecognized assets and liabilities, in accordance with the procedure that would be required in determining the fair value of assets acquired and liabilities assumed in a business combination.  However, under the amendments in ASU 2017-04, an entity should (1) perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and (2) recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value, with the understanding that the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit.  Additionally, ASU 2017-04 removes the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails such qualitative test, to perform Step 2 of the goodwill impairment test.  ASU 2017-04 is effective prospectively for public entities for annual, or any interim, goodwill impairment tests in fiscal years beginning after December 15, 2019 and for all other entities for impairment tests in fiscal years beginning after December 15, 2021.  Management will adopt this ASU using the public company effective date as early adoption is permitted and will continue to evaluate the impact this ASU will have on the consolidated financial statements through its effective date; however, the adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements.  

ASU 2017-01, “Business Combinations (Topic 805) - Clarifying the Definition of a Business.” Issued in January 2017, ASU 2017-01 clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses, which determines whether goodwill should be recorded or not. The amendments in ASU No. 2017-01 provide a screen to determine when a set of assets and activities (collectively, a “set”) is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated.  If, however, the screen is not met, then the amendments in ASU 2017-01 require that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output and remove the evaluation of whether a market participant could replace missing elements.  The revised definition will result in more transactions being recorded as asset acquisitions or dispositions as opposed to

9

business acquisitions or dispositions.  The amendments of ASU 2017-01 are effective for public business entities for fiscal years beginning after December 15, 2017, and for private companies for fiscal years beginning after December 15, 2018.  Management has elected to adopt this ASU using the private company effective date and is currently evaluating the impact this ASU will have on the consolidated financial statements; however, the adoption of ASU 2017-01 is not expected to have a material impact on the Company’s consolidated financial statements.  

In October 2016, the FASB issued ASU No. 2016-16, "Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory." The objective of issuing this ASU is to improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Current GAAP prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in GAAP. As such, the Board decided that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendments in this guidance eliminate the exception for an intra-entity transfer of an asset other than inventory. The amendments of this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, and for private companies for fiscal years beginning after December 15, 2018.  Early adoption is permitted for all entities as of the beginning of an annual reporting period for which financial statements (interim or annual) have not been issued or made available for issuance. That is, earlier adoption should be in the first interim period if an entity issues interim financial statements. Management has elected to adopt this ASU using the private company effective date and is currently evaluating this guidance to determine the impact on its consolidated financial position, results of operations or cash flows.

ASU 2016-13, “Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.”  Issued in June 2016, ASU 2016-13 will add FASB ASC Topic 326, “Financial Instruments-Credit Losses” and finalizes amendments to FASB ASC Subtopic 825-15, “Financial Instruments-Credit Losses.”  The amendments of ASU 2016-13 are intended to provide financial statement users with more decision-useful information related to expected credit losses on financial instruments and other commitments to extend credit by replacing the current incurred loss impairment methodology with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to determine credit loss estimates.  The amendments of ASU 2016-13 eliminate the probable initial recognition threshold and, in turn, reflect an entity’s current estimate of all expected credit losses.  ASU 2016-13 does not specify the method for measuring expected credit losses, and an entity is allowed to apply methods that reasonably reflect its expectations of the credit loss estimate.  Additionally, the amendments of ASU 2016-13 require that credit losses on available for sale debt securities be presented as an allowance rather than as a write-down.  The amendments of ASU 2016-13 are effective for public entities for interim and annual periods beginning after December 15, 2019 and for all other entities for periods beginning after December 15, 2020.  Earlier application is permitted for interim and annual periods beginning after December 15, 2018.  Management has elected to adopt this ASU using the private company effective date and is currently evaluating the impact this ASU will have on the consolidated financial statements and that evaluation will depend on economic conditions and the composition of the Company’s loan and lease portfolio at the time of adoption.

ASU 2016-02, “Leases (Topic 842).” Issued in February 2016, ASU 2016-02 was issued by the FASB to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and by disclosing key information about leasing arrangements.  ASU 2016-02 will, among other things, require lessees to recognize a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 does not significantly change lease accounting requirements applicable to lessors; however, the ASU contains some targeted improvements that are intended to align, where necessary, lessor accounting with the lessee accounting model and with the updated revenue recognition guidance issued in 2014.  The amendments of ASU 2016-02 are effective for public entities for interim and annual periods beginning after December 15, 2018 and for other entities for periods beginning after December 15, 2019.  The adoption of this ASU will result in an increase to the Consolidated Balance Sheets for right-of-use assets and associated lease liabilities for operating leases in which the Company is the lessee.  Under current accounting standards, all of the Company's leases are classified as operating leases and, as such, are not recognized on the Company's Consolidated Balance Sheet. Additionally, in July 2018, the FASB issued ASU No. 2018-10, Codification Improvements to Topic 842, Leases and ASU No. 2018-11, Leases, Targeted Improvements. The amendments in these updates provide additional clarification and implementation guidance on certain aspects of ASU 2016-02 and have the same effective and transition requirements as ASU 2016-02. Specifically, ASU 2018-11 creates an additional transition method option allowing entities to record a cumulative effect adjustment to opening retained earnings in the year of adoption.  Management will adopt these ASU’s using the public company effective date as early adoption is permitted and is currently evaluating the impact to the consolidated financial statements and related method of adoption, specifically, we are in the process of reviewing service contracts to determine if right-of-use assets exist.

ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” Issued in May 2014, ASU 2014-09 will add FASB ASC Topic 606, “Revenue from Contracts with Customers,” and will supersede revenue recognition requirements in FASB ASC Topic 605, “Revenue Recognition,” as well as certain cost guidance in FASB ASC Topic 605-35, “Revenue Recognition – Construction-Type and Production-Type Contracts.” ASU 2014-09 provides a framework for revenue recognition that replaces the existing industry and transaction specific requirements under the existing standards.  ASU 2014-09 requires an entity to apply a five-step model to

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determine when to recognize revenue and at what amount.  The model specifies that revenue should be recognized when (or as) an entity transfers control of goods or services to a customer at the amount in which the entity expects to be entitled.  Depending on whether certain criteria are met, revenue should be recognized either over time, in a manner that depicts the entity’s performance, or at a point in time, when control of the goods or services are transferred to the customer.  ASU 2014-09 provides that an entity should apply the following steps: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when, or as, the entity satisfies a performance obligation.  In addition, the existing requirements for the recognition of a gain or loss on the transfer of non-financial assets that are not in a contract with a customer are amended to be consistent with the guidance on recognition and measurement in ASU 2014-09.  The amendments of ASU 2014-09 may be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application.  If the transition method of application is elected, the entity should also provide the additional disclosures in reporting periods that include the date of initial application of (1) the amount by which each financial statement line item is affected in the current reporting period, as compared to the guidance that was in effect before the change, and (2) an explanation of the reasons for significant changes.  ASU 2015-14, “Revenue from Contracts with Customers (Topic 606)-Deferral of the Effective Date,”issued in August 2015, defers the effective date of ASU 2014-09 by one year.  ASU 2015-14 provides that the amendments of ASU 2014-09 become effective for public business entities for fiscal years beginning after December 15, 2017, and for private companies for fiscal years beginning after December 15, 2018.  All subsequently issued ASU’s which provide additional guidance and clarifications to various aspects of FASB ASC Topic 606 will become effective when the amendments of ASU 2014-09 become effective.  These subsequently issued ASU’s include ASU 2016-08 “Revenue from Contracts with Customers (Topic 606)-Principal versus Agent Considerations,” ASU 2016-10 “Revenue from Contracts with Customers (Topic 606)-Identifying Performance Obligations and Licensing,”and ASU 2016-12 “Revenue from Contracts with Customers (Topic 606)-Narrow Scope Improvements and Practical Expedients.”  These amendments clarify the main provisions of ASU-2014-09 with respect to specific revenue types based upon implementation questions submitted.  Specifically, revenue in which a third party satisfies a portion of the performance obligations, revenue from licensing activities, and the assessment of collectability, treatment of sales taxes, non-cash consideration, and contract modifications at transition.  Management has elected to adopt this ASU using the private company effective date and has completed an analysis to determine which revenue streams are within the scope of ASU 2014-09 and the associated impact on those revenue streams.  Management has determined that approximately 5% of the revenues earned by the Company are within the scope of ASU 2014-09, and, for most of the revenue streams within the scope of ASU 2014-09, the amendments do not change the timing or amount of revenue recognized.  Management will adopt this ASU using the modified retrospective method of application and does not anticipate recording a cumulative adjustment for prior periods presented.

NOTE 2. INVESTMENT SECURITIES

The amortized cost, gross unrealized gains and losses and approximate fair values of securities available for sale are as follows:

	Amortized		Unrealized				Fair
September 30, 2018	Cost		Gains		Losses		Value
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	2,014	$	—	$	108	$	1,906
Residential mortgage-backed securities		27,197		—		1,149		26,048
Corporate bonds and other debt securities		5,678		—		183		5,495
Total available for sale	$	34,889	$	—	$	1,440	$	33,449

	Amortized		Unrealized				Fair
December 31, 2017	Cost		Gains		Losses		Value
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	2,010	$	—	$	61	$	1,949
Residential mortgage-backed securities		30,156		—		527		29,629
Corporate bonds and other debt securities		5,711		—		46		5,665
Total available for sale	$	37,877	$	—	$	634	$	37,243

There were no securities pledged at September 30, 2018 or December 31, 2017, respectively.

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The amortized cost and estimated fair value of securities available for sale, by contractual maturity, are as follows:

	Amortized		Fair
September 30, 2018	Cost		Value
	(Dollars in thousands)
Available for sale:
Due in one year or less	$	—	$	—
Due after one year through five years		4,117		3,998
Due after five years through ten years		3,098		2,954
Due after ten years		477		449
Residential mortgage-backed securities		27,197		26,048
Total available for sale	$	34,889	$	33,449

For purposes of the maturity table, residential mortgage-backed securities, the principal of which are repaid periodically, are presented as a single amount. The expected lives of these securities will differ from contractual maturities because borrowers may have the right to prepay the underlying loans with or without prepayment penalties.

The following tables present the estimated fair values and gross unrealized losses on investment securities available for sale, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position as of the periods presented:

	Less than 12 Months				12 Months or More				Total
September 30, 2018	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	—	$	—	$	1,906	$	108	$	1,906	$	108
Residential mortgage-backed securities		1,121		63		24,925		1,086		26,046		1,149
Corporate bonds and other debt securities		2,551		81		2,944		102		5,495		183
Total available for sale	$	3,672	$	144	$	29,775	$	1,296	$	33,447	$	1,440

	Less than 12 Months				12 Months or More				Total
December 31, 2017	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	1,949	$	61	$	—	$	—	$	1,949	$	61
Residential mortgage-backed securities		29,627		527		—		—		29,627		527
Corporate bonds and other debt securities		5,665		46		—		—		5,665		46
Total available for sale	$	37,241	$	634	$	—	$	—	$	37,241	$	634

At September 30, 2018, the Company’s securities portfolio consisted of 50 securities, 49 of which were in an unrealized loss position. Six of the 49 securities in an unrealized loss position at September 30, 2018 were in an unrealized loss position for less than 12 months. The unrealized losses for these securities resulted primarily from changes in interest rates and spreads.

The Company monitors its investment securities for other-than-temporary-impairment (“OTTI”). Impairment is evaluated on an individual security basis considering numerous factors, and its relative significance. The Company has evaluated the nature of unrealized losses in the investment securities portfolio to determine if OTTI exists. The unrealized losses relate to changes in market interest rates and specific market conditions that do not represent credit-related impairments. Furthermore, the Company does not intend to sell nor is it more likely than not that it will be required to sell these investments before the recovery of their amortized cost basis. Management has completed an assessment of each security in an unrealized loss position for credit impairment and has determined that no individual security was other-than-temporarily impaired at September 30, 2018. The following describes the basis under which the Company has evaluated OTTI:

U.S. Government Agencies and Residential Mortgage-Backed Securities (“MBS”):

The unrealized losses associated with U.S. Government agencies and residential MBS are primarily driven by changes in interest rates. These securities have either an explicit or implicit U.S. government guarantee.

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Corporate Bonds & Other Debt Securities:

Securities are generally underwritten in accordance with the Company’s investment standards prior to the decision to purchase, without relying on a bond issuer’s guarantee in making the investment decision. These investments are investment grade and will continue to be monitored as part of the Company’s ongoing impairment analysis, but are expected to perform in accordance with their terms.

There were no securities sold for the three or nine months ended September 30, 2018 or 2017.

NOTE 3. LOANS, NET

Loans consisted of the following at September 30, 2018 and December 31, 2017:

	September 30, 2018			December 31, 2017
	(Dollars in thousands)
Commercial and industrial loans (1)	$	159,776		$	135,040
Real estate:
1-4 single family residential loans		244,633			232,510
Construction, land and development		155,778			139,470
Commercial real estate loans (including multifamily)		324,212			285,731
Consumer loans and leases		18,174			22,736
Municipal and other loans		51,501			53,632
Total loans held in portfolio (2)	$	954,074		$	869,119
Allowance for loan losses		(6,156	)		(5,652	)
Loans held in portfolio, net	$	947,918		$	863,467

(1) Balance includes $75.9 million and $67.1 million of the unguaranteed portion of SBA loans as of September 30, 2018 and December 31, 2017, respectively.

(2) Balance includes $(3.6) million and $(3.4) million of deferred fees, cost, premium and discount as of September 30, 2018 and December 31, 2017, respectively.

At September 30, 2018 and December 31, 2017, the Company had pledged loans as collateral for FHLB advances of $376.4 million and $358.2 million, respectively. There were no recorded investments of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process as of September 30, 2018 and December 31, 2017.

The Company originates and sells loans secured by the SBA. The Company retains the unguaranteed portion of the loan and servicing on the loans sold and receives a fee based upon the principal balance outstanding. During the three months ended September 30, 2018 and 2017, the Company sold approximately $19.0 million and $16.9 million, respectively, in loans to third parties. The loan sales resulted in realized gains of $1.4 million and $1.4 million for the three months ended September 30, 2018 and 2017, respectively. During the nine months ended September 30, 2018 and 2017, the Company sold approximately $49.0 million and $52.3 million, respectively, in loans to third parties. The loan sales resulted in realized gains of $3.9 million and $4.7 million for the nine months ended September 30, 2018 and 2017, respectively.

During the second quarter of 2018, the Company sold a loan to one of its directors for $1.5 million.  No gain or loss was recognized on this transaction.

In the ordinary course of business, the Company makes loans to executive officers and directors. Loans to these related parties, including companies in which they are principal owners, are as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
	(Dollars in thousands)
Principal outstanding, beginning of year	$	421		$	516		$	463		$	9,036
Additions (reductions) of affiliations		—			—			—			(8,425	)
New loans made in current year		—			—			—			—
Repayments (1)		(19	)		(26	)		(61	)		(121	)
Principal outstanding, end of year	$	402		$	490		$	402		$	490

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(1) During the three months ended June 30, 2017 there was a reclassification of repayments to reductions of affiliations.

There were no unfunded commitments to related parties at September 30, 2018 or December 31, 2017.

NOTE 4. ALLOWANCE FOR LOAN AND LEASE LOSSES

The allowance for loan and lease losses is a reserve established through a provision for loan losses charged to expense, which represents management’s best estimate of probable losses that have been incurred within the existing portfolio of loans.  The allowance, in the judgment of management, is necessary to reserve for estimated loan losses and risks inherent in the loan portfolio. The methodology is based on historical loss experience by type of credit and internal risk grade, changes in the composition and volume of the portfolio, and specific loss allocations, with adjustments for current events and conditions. The Company’s process for determining the appropriate level of the allowance for loan and lease losses is designated to account for credit deterioration as it occurs.

During 2017, the Company refined its allowance for loan loss methodology based upon management’s judgment and applicable regulatory guidance.  The calculation of reserves on loans collectively evaluated for impairment was altered to reflect five years of historical loss experience which more appropriately matches the weighted average life of loans in the portfolio.  Additionally, the calculated historical loss experience is now allocated across the portfolio’s risk rates using a probability of default curve constructed from the Bank’s historical default data. Management also updated the qualitative component of the reserve on loans collectively evaluated for impairment to allow for a greater sensitivity to current trends.

Prior to the second quarter of 2018, the Company was utilizing a peer bank allowance coverage ratio in the qualitative reserve calculation, as the Company did not have enough historical defaults to rely on its own loss factors. As of September 30, 2018, the Company had a sufficient amount of defaults over the five year lookback period to transition over to relying more on its own historical loss data versus peer data. While this did not result in a significant change to the allowance for loan and lease losses as a whole, it continues to impact the provision for certain loan categories in which the Company had experienced more historical defaults.

The following tables present information related to allowance for loan and lease losses for the periods presented:

	Allowance Rollforward
Three Months Ended September 30, 2018	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	4,886	$	(275	)	$	4	$	76		$	4,691
Real estate:
1-4 single family residential loans		318		—			—		(216	)		102
Construction, land and development loans		195		—			—		256			451
Commercial real estate loans (including multifamily)		233		—			—		495			728
Consumer loans and leases		346		(74	)		—		(90	)		182
Municipal and other loans		37		—			—		(35	)		2
Ending allowance balance	$	6,015	$	(349	)	$	4	$	486		$	6,156

	Allowance Rollforward
Three Months Ended September 30, 2017	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	2,582	$	(15	)	$	—	$	20		$	2,587
Real estate:
1-4 single family residential loans		732		—			—		201			933
Construction, land and development loans		412		—			—		103			515
Commercial real estate loans (including multifamily)		800		—			—		255			1,055
Consumer loans and leases		204		(16	)		—		(15	)		173
Municipal and other loans		161		—			—		40			201
Ending allowance balance	$	4,891	$	(31	)	$	—	$	604		$	5,464

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	Allowance Rollforward
Nine Months Ended September 30, 2018	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	3,046	$	(920	)	$	73	$	2,492		$	4,691
Real estate:
1-4 single family residential loans		902		(5	)		—		(795	)		102
Construction, land and development loans		441		—			—		10			451
Commercial real estate loans (including multifamily)		898		—			—		(170	)		728
Consumer loans and leases		198		(104	)		—		88			182
Municipal and other loans		167		—			—		(165	)		2
Ending allowance balance	$	5,652	$	(1,029	)	$	73	$	1,460		$	6,156

	Allowance Rollforward
Nine Months Ended September 30, 2017	Beginning Balance		Charge-offs			Recoveries		Provision		Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	2,347	$	(555	)	$	2	$	793	$	2,587
Real estate:
1-4 single family residential loans		647		—			—		286		933
Construction, land and development loans		364		—			—		151		515
Commercial real estate loans (including multifamily)		667		(15	)		—		403		1,055
Consumer loans and leases		186		(129	)		—		116		173
Municipal and other loans		146		—			—		55		201
Ending allowance balance	$	4,357	$	(699	)	$	2	$	1,804	$	5,464

Credit Quality Indicators

In evaluating credit risk, the Company looks at multiple factors; however, management considers delinquency status to be the most meaningful indicator of the credit quality of 1-4 single family residential, home equity loans and lines of credit and consumer loans. Delinquency statistics are updated at least monthly. Internal risk ratings are considered the most meaningful indicator of credit quality for commercial, construction, land and development and commercial real estate loans. Internal risk ratings are updated on a continuous basis.

The following tables present an aging analysis of the recorded investment for delinquent loans by portfolio and segment:

	Accruing
September 30, 2018	Current		30 to 59 Days Past Due		60 to 89 Days Past Due		90 Days or More Past Due		Non- Accrual		Total
	(Dollars in thousands)
Commercial and industrial loans	$	155,996	$	1,246	$	113	$	—	$	2,421	$	159,776
Real estate:
1-4 single family residential loans		242,606		776		—		426		825		244,633
Construction, land and development		155,767		11		—		—		—		155,778
Commercial real estate loans (including multifamily)		324,212		—		—		—		—		324,212
Consumer loans and leases		18,051		37		14		—		72		18,174
Municipal and other loans		51,501		—		—		—		—		51,501
Total loans	$	948,133	$	2,070	$	127	$	426	$	3,318	$	954,074

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	Accruing
December 31, 2017	Current		30 to 59 Days Past Due		60 to 89 Days Past Due		90 Days or More Past Due		Non- Accrual		Total
	(Dollars in thousands)
Commercial and industrial loans	$	132,775	$	302	$	3	$	33	$	1,927	$	135,040
Real estate:
1-4 single family residential loans		230,738		637		—		—		1,135		232,510
Construction, land and development		139,470		—		—		—		—		139,470
Commercial real estate loans (including multifamily)		284,869		415		—		—		447		285,731
Consumer loans and leases		22,538		98		47		—		53		22,736
Municipal and other loans		53,632		—		—		—		—		53,632
Total loans	$	864,022	$	1,452	$	50	$	33	$	3,562	$	869,119

There was one loan 90 days or more past due and still accruing at September 30, 2018 with a recorded investment of $426 thousand. There was one loan 90 days or more past due and still accruing at December 31, 2017 with a recorded investment of $33 thousand.

At September 30, 2018, non-accrual loans that were 30 to 59 days past due were $355 thousand, non-accrual loans that were 60 to 89 days past due were $337 thousand, and non-accrual loans that were 90 days or more past due were $917 thousand. At December 31, 2017, non-accrual loans that were 30 to 59 days past due were $209 thousand, non-accrual loans that were 60 to 89 days past due were $57 thousand, and non-accrual loans that were 90 days or more past due were $427 thousand.

Loans exhibiting potential credit weaknesses that deserve management’s close attention and that if left uncorrected may result in deterioration of the repayment capacity of the borrower are categorized as special mention. Loans with well-defined credit weaknesses including payment defaults, declining collateral values, frequent overdrafts, operating losses, increasing balance sheet leverage, inadequate cash flow, project cost overruns, unreasonable construction delays, past due real estate taxes or exhausted interest reserves are assigned an internal risk rating of substandard. Loans classified as substandard can be on an accrual or non-accrual basis, as determined by its unique characteristics. A loan with a weakness so severe that collection in full is highly questionable or improbable will be assigned an internal risk rating of doubtful.

The following table summarizes the Company’s loans by key indicators of credit quality:

September 30, 2018	Pass		Special Mention		Substandard		Doubtful
	(Dollars in thousands)
Commercial and industrial loans	$	151,088	$	2,904	$	5,597	$	187
Real estate:
1-4 single family residential loans		240,081		—		4,552		—
Construction, land and development		154,305		315		1,158		—
Commercial real estate loans (including multifamily)		312,574		9,786		1,852		—
Consumer loans and leases		18,046		—		128		—
Municipal and other loans		51,501		—		—		—
Total loans	$	927,595	$	13,005	$	13,287	$	187

December 31, 2017	Pass		Special Mention		Substandard		Doubtful
	(Dollars in thousands)
Commercial and industrial loans	$	129,288	$	2,331	$	3,421	$	—
Real estate:
1-4 single family residential loans		228,450		1,090		2,970		—
Construction, land and development		137,760		1,403		307		—
Commercial real estate loans (including multifamily)		276,096		5,877		3,758		—
Consumer loans and leases		22,528		—		208		—
Municipal and other loans		53,632		—		—		—
Total loans	$	847,754	$	10,701	$	10,664	$	—

Internal risk ratings and other credit metrics are key factors in identifying loans to be individually evaluated for impairment and impact management’s estimates of loss factors used in determining the amount of the allowance for loan and lease losses.

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The following table shows the Company’s investment in loans disaggregated based on the method of evaluating impairment:

	Loans - Recorded Investment				Allowance for Credit Loss
September 30, 2018	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
	(Dollars in thousands)
Commercial and industrial loans	$	2,494	$	157,282	$	1,085	$	3,606
Real estate:
1-4 single family residential loans		970		243,663		—		102
Construction, land and development		—		155,778		—		451
Commercial real estate loans (including multifamily)		—		324,212		—		728
Consumer loans and leases		72		18,102		24		158
Municipal and other loans		—		51,501		—		2
Total loans	$	3,536	$	950,538	$	1,109	$	5,047

	Loans - Recorded Investment				Allowance for Credit Loss
December 31, 2017	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
	(Dollars in thousands)
Commercial and industrial loans	$	2,194	$	132,846	$	1,226	$	1,820
Real estate:
1-4 single family residential loans		1,292		231,218		119		783
Construction, land and development		—		139,470		—		441
Commercial real estate loans (including multifamily)		447		285,284		—		898
Consumer loans and leases		53		22,683		16		182
Municipal and other loans		—		53,632		—		167
Total loans	$	3,986	$	865,133	$	1,361	$	4,291

The following tables set forth certain information regarding the Company’s impaired loans that were evaluated for specific reserves:

	Impaired Loans - With Allowance						Impaired Loans - With no Allowance
September 30, 2018	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance
	(Dollars in thousands)
Commercial and industrial loans	$	1,784	$	6,159	$	1,085	$	710	$	1,514
Real estate:
1-4 single family residential loans		—		—		—		970		1,000
Construction, land and development		—		—		—		—		—
Commercial real estate loans (including multifamily)		—		—		—		—		—
Consumer loans and leases		54		55		24		18		18
Municipal and other loans		—		—		—		—		—
Total loans	$	1,838	$	6,214	$	1,109	$	1,698	$	2,532

17

	Impaired Loans - With Allowance						Impaired Loans - With no Allowance
December 31, 2017	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance
	(Dollars in thousands)
Commercial and industrial loans	$	1,811	$	1,850	$	1,226	$	383	$	386
Real estate:
1-4 single family residential loans		119		119		119		1,173		1,174
Construction, land and development		—		—		—		—		—
Commercial real estate loans (including multifamily)		—		—		—		447		447
Consumer loans and leases		53		52		16		—		—
Municipal and other loans		—		—		—		—		—
Total loans	$	1,983	$	2,021	$	1,361	$	2,003	$	2,007

	Three Months Ended September 30,
	2018				2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(Dollars in thousands)
Commercial and industrial loans	$	2,571	$	—	$	2,220	$	—
Real estate:
1-4 single family residential loans		975		—		750		—
Construction, land and development		—		—		312		—
Commercial real estate loans (including multifamily)		—		—		1,997		—
Consumer loans and leases		72		—		55		—
Municipal and other loans		—		—		—		—
Total loans	$	3,618	$	—	$	5,334	$	—

	Nine Months Ended September 30,
	2018				2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(Dollars in thousands)
Commercial and industrial loans	$	2,774	$	—	$	2,363	$	—
Real estate:
1-4 single family residential loans		990		—		756		—
Construction, land and development		—		—		316		—
Commercial real estate loans (including multifamily)		—		—		1,983		—
Consumer loans and leases		76		—		56		—
Municipal and other loans		—		—		—		—
Total loans	$	3,840	$	—	$	5,474	$	—

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Troubled Debt Restructurings:

The following table provides a summary of troubled debt restructurings (“TDRs”) based upon delinquency status, all of which are considered impaired:

	September 30, 2018				December 31, 2017
	Number of contracts		Recorded Investment		Number of contracts		Recorded Investment
	(Dollars in thousands)
Performing TDRs:
Commercial and industrial loans		4	$	73		5	$	270
Real estate:
1-4 single family residential loans		2		145		—		—
Construction, land and development		—		—		—		—
Commercial real estate loans (including multifamily)		—		—		—		—
Consumer loans and leases		—		—		—		—
Municipal and other loans		—		—		—		—
Total performing TDRs		6		218		5		270
Nonperforming TDRs		5		470		10		651
Total TDRs		11	$	688		15	$	921
Allowance attributable to TDRs			$	113			$	411

The following table summarizes TDRs and includes newly designated TDRs as well as modifications made to existing TDRs. Modifications may include, but are not limited to, granting a material extension of time, entering into a forbearance agreement, adjusting the interest rate, accepting interest only payments for an extended period of time, a change in the amortization period or a combination of any of these. Post-modification balances represent the recorded investment at the end of Day 2 in which the modification was made:

	Three Months Ended September 30,
	2018								2017
	Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance		Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance
	(Dollars in thousands)
Commercial and industrial loans		—	$	—	$	—	$	—		2	$	38	$	38	$	—
Real estate:
1-4 single family residential loans		—		—		—		—		—		—		—		—
Construction, land and development		—		—		—		—		—		—		—		—
Commercial real estate loans (including    multifamily)		—		—		—		—		—		—		—		—
Consumer loans and leases		—		—		—		—		—		—		—		—
Municipal and other loans		—		—		—		—		—		—		—		—

	Nine Months Ended September 30,
	2018								2017
	Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance		Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance
	(Dollars in thousands)
Commercial and industrial loans		7	$	442	$	442	$	113		10	$	465	$	465	$	126
Real estate:
1-4 single family residential loans		1		34		34		—		—		—		—		—
Construction, land and development		—		—		—		—		—		—		—		—
Commercial real estate loans (including    multifamily)		—		—		—		—		—		—		—		—
Consumer loans and leases		—		—		—		—		—		—		—		—
Municipal and other loans		—		—		—		—		—		—		—		—

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NOTE 5. GOODWILL AND INTANGIBLES

Goodwill and other intangible assets, which consist of core deposit intangibles, are summarized as follows:

	September 30, 2018			December 31, 2017
	(Dollars in thousands)
Goodwill	$	4,485		$	4,485
Core deposit intangible		7,179			7,179
Total		11,664			11,664
Less: Accumulated amortization		(4,220	)		(3,693	)
Total, net	$	7,444		$	7,971

Amortization expense for core deposit intangibles for the nine months ended September 30, 2018 and 2017 totaled $527 thousand each.

The estimated amount of amortization expense for core deposit intangible assets to be recognized over the next five fiscal years is as follows:

Type of intangibles	Remainder of 2018		2019		2020		2021		2022		2023
	(Dollars in thousands)
Core deposit intangible	$	176	$	703	$	703	$	607	$	371	$	239

NOTE 6. SBA SERVICING ASSET

SBA servicing assets are recognized separately when rights are acquired through the sale of the guaranteed portion of SBA loans. These servicing rights are initially measured at fair value at the date of sale and included in the gain on sale. Updated fair values are obtained from an independent third party on a quarterly basis and adjustments are presented in SBA loan servicing fees on the consolidated statements of income. To determine the fair value of SBA servicing rights, the Company uses market prices for comparable servicing contracts, when available, or alternatively, uses a valuation model that calculates the present value of estimated future net servicing income.

Loans serviced for others are not included in the accompanying balance sheets.  The unpaid principal balances of loans serviced for others were $299.6 million and $275.2 million at September 30, 2018 and December 31, 2017, respectively.

The risks inherent in the SBA servicing asset relate primarily to changes in prepayments that result from shifts in interest rates.  The following summarizes the activity pertaining to SBA servicing rights, which are in the consolidated balance sheets, for the three and nine months ended September 30, 2018 and 2017:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
	(Dollars in thousands)
Beginning balance	$	3,521		$	3,515		$	3,411		$	3,132
Origination of servicing assets		376			367			955			1,132
Change in fair value:
Due to run-off		(254	)		(216	)		(707	)		(600	)
Due to market changes		(82	)		(172	)		(98	)		(170	)
Ending balance	$	3,561		$	3,494		$	3,561		$	3,494

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NOTE 7. DEPOSITS

The following table sets forth the Company’s deposits by category:

	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Noninterest-bearing demand deposits	$	207,727	$	176,726
Interest-bearing NOW accounts		7,865		7,318
Savings and money market accounts		214,380		243,173
Time deposits		442,638		408,151
Total deposits	$	872,610	$	835,368
Time deposits $100,000 and greater	$	346,844	$	314,102
Time deposits $250,000 and greater		90,056		82,816
Related party deposits (executive officers and directors)		12,983		13,914

The aggregate amount of overdraft demand deposits reclassified to loans was $15 thousand and $27 thousand at September 30, 2018 and December 31, 2017, respectively. The aggregate amount of maturities for time deposits for each of the five years following the latest balance sheet date totaled $267.8 million, $132.9 million, $22.7 million, $9.7 million and $9.5 million, respectively.

NOTE 8. STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS

Spirit of Texas Bancshares, Inc. 2008 Stock Plan (the “2008 Stock Plan”)

Option activity for the period indicated is summarized as follows:

	2008 Stock Plan
	Options			Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		1,415,350		$	12.59
Granted		—
Exercised		(192,928	)	$	10.63	$	2,114
Forfeited (1)		(18,750	)	$	13.33	$	155
Expired		—
Outstanding at September 30, 2018		1,203,672		$	12.89	$	10,472		4.92
Exercisable at September 30, 2018		990,457		$	12.58	$	8,924		4.47
Vested at September 30, 2018		990,457		$	12.58	$	8,924		4.47

(1) Forfeitures are accounted for in the period they occur.

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The total unrecognized compensation cost of $764 thousand related to the 2008 Stock Plan for the share awards outstanding at September 30, 2018 will be recognized over a weighted average remaining period of 2.00 years.

Spirit of Texas Bancshares, Inc. 2017 Stock Plan (the “2017 Stock Plan”)

Option activity for the period indicated is summarized as follows:

	2017 Stock Plan
	Options		Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		127,927	$	15.00
Granted		83,340		20.69	$	75
Exercised		—
Forfeited (1)		—
Expired		—
Outstanding at September 30, 2018		211,267	$	17.25	$	917		8.89
Exercisable at September 30, 2018		77,335	$	15.00	$	510		8.41
Vested at September 30, 2018		77,335	$	15.00	$	510		8.41

(1) Forfeitures are accounted for in the period they occur.

The fair values of the stock options granted for the nine months ended September 30, 2018 were determined utilizing the Black-Scholes pricing model methodology. A summary of assumptions used to calculate the fair values of the 2017 Stock Plan awards is presented below:

	2017 Stock Plan
	Nine Months Ended
	September 30, 2018
Expected volatility		23	%
Expected dividend yield		0.0	%
Expected term (years)	7.5
Risk-free interest rate	2.36 - 2.87%
Weighted average grant date fair value	$	6.77

The expected volatility is based on the volatility of comparable peer banks. The expected term represents the period of time that the 2017 Stock Plan awards are expected to be outstanding from the date of grant. The risk-free interest rate is based on the U.S. Treasury yields for the expected term of the instrument.

The total unrecognized compensation cost of $687 thousand related to the 2017 Stock Plan for the share awards outstanding at September 30, 2018 will be recognized over a weighted average remaining period of 4.31 years.

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Warrants

Activity for the Spirit of Texas Bancshares, Inc. 2008 Warrants for the period indicated is summarized as follows:

	Spirit of Texas Bancshares, Inc. 2008 Warrants
	Warrants			Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		105,000		$	10.00
Granted		—
Exercised		(45,000	)	$	10.00	$	522
Forfeited (1)		—
Expired		—
Outstanding at September 30, 2018		60,000		$	10.00	$	695		0.13
Exercisable at September 30, 2018		60,000		$	10.00	$	695		0.13
Vested at September 30, 2018		60,000		$	10.00	$	695		0.13

(1) Forfeitures are accounted for in the period they occur.

There is no remaining expense to be recognized on the Spirit of Texas Bancshares, Inc. 2008 Warrants.

Activity for the Bank4Texas Warrants for the period indicated is summarized as follows:

	Bank4Texas Warrants
	Warrants			Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		12,072		$	10.50
Granted		—
Exercised		(1,362	)	$	10.50	$	15
Forfeited (1)		—
Expired		—
Outstanding at September 30, 2018		10,710		$	10.50	$	119		1.90
Exercisable at September 30, 2018		10,710		$	10.50	$	119		1.90
Vested at September 30, 2018		10,710		$	10.50	$	119		1.90

(1) Forfeitures are accounted for in the period they occur.

There was no activity during the nine months ended September 30, 2018 on the Oasis Warrants.

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NOTE 9. BASIC AND DILUTED EARNINGS PER COMMON SHARE

The following table presents the computation of basic and diluted EPS:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
	(Dollars in thousands, except per share data)
Net income as reported	$	2,771	$	2,002	$	7,465	$	4,230
Less: Participated securities share of undistributed earnings		—		—		—		27
Net income available to common stockholders	$	2,771	$	2,002	$	7,465	$	4,203
Weighted average number of common shares - basic		9,792,032		7,279,178		8,673,106		7,218,147
Effect of dilutive securities:
Employee stock-based compensation awards and warrants		568,269		286,061		421,585		286,061
Weighted average number of common shares - diluted		10,360,301		7,565,239		9,094,691		7,504,208
Basic earnings per common share	$	0.28	$	0.28	$	0.86	$	0.58
Diluted earnings per common share	$	0.27	$	0.26	$	0.82	$	0.56
Anti-dilutive warrants and stock options		7,246		261,475		78,490		261,475

NOTE 10. INCOME TAXES

The Company estimates both permanent and temporary differences in computing its interim tax provision. This effective tax rate is based on actual pre-tax income which approximates the effective tax rate based on forecasted annual pre-tax income, permanent tax differences and statutory tax rates.

The effective tax rates for the three months ended September 30, 2018 and 2017 were 20.6% and 35.5%, respectively. The decrease in the effective tax rate for the three months ended September 30, 2018 was primarily due to the enactment of the 2017 Tax Cuts and Jobs Act (the “Tax Reform”) which reduced the corporate tax rate from 34.0% to 21.0%.

The effective tax rates for the nine months ended September 30, 2018 and 2017 were 20.3% and 34.9%, respectively. The decrease in the effective tax rate for the nine months ended September 30, 2018 was primarily due to the enactment of the Tax Reform which reduced the corporate tax rate from 34.0% to 21.0%.

The Company recorded an uncertain tax position at December 31, 2017 arising from a deduction taken on the 2016 federal return related to a request for change in accounting method.  The total amount of the recorded uncertain tax position at December 31, 2017 was $903 thousand and is included in other liabilities. During the second quarter of 2018, the Company filed an amended return and the uncertain tax position was settled against the balance left on account with the IRS.  The Company’s policy is to classify interest and penalties associated with income taxes within other expenses. The Company did not record interest and penalties associated with income taxes for the three or nine months ended September 30, 2018 or 2017.

NOTE 11. COMMITMENTS AND CONTINGENCIES

The Company issues off-balance sheet financial instruments in connection with its lending activities and to meet the financing needs of its customers. These financial instruments include commitments to fund loans and lines of credit as well as commercial and standby letters of credit. These commitments expose the Company to varying degrees of credit and market risk which are essentially the same as those involved in extending loans to customers. The Company follows the same credit policies in making commitments as it does for instruments recorded on the Company’s consolidated balance sheet. Collateral is obtained based on management’s assessment of the customer’s credit risk.

The Company’s exposure to credit loss is represented by the contractual amount of these commitments. As of September 30, 2018 and December 31, 2017, the Company’s reserve for unfunded commitments totaled $40 thousand.

Fees collected on off-balance sheet financial instruments represent the fair value of those commitments and are deferred and amortized over their term.

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Financial Instruments Commitments

Unfunded commitments are as follows:

	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Unfunded loan commitments	$	142,657	$	134,536
Commercial and standby letters of credit		85		91
Total	$	142,742	$	134,627

Unfunded loan commitments:

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if it is deemed necessary by the Company upon extension of credit, is based upon management’s credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, property, plant and equipment, and income-producing commercial properties.

Commercial and standby letters of credit:

Letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Letters of credit are primarily issued to support trade transactions or guarantee arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The Company generally holds collateral supporting those commitments if deemed necessary.

Other Commitments and Contingencies

Legal Proceedings

The Company, from time to time, is involved as plaintiff or defendant in various legal actions arising in the normal course of business. While the ultimate outcome of any such proceedings cannot be predicted with certainty, it is the opinion of management, based upon advice of legal counsel, that no proceedings exist, either individually or in the aggregate, which, if determined adversely to the Company, would have a material effect on the Company’s consolidated balance sheet, results of operations or cash flows.

NOTE 12. FAIR VALUE MEASUREMENTS

When determining the fair value measurements for assets and liabilities and the related fair value hierarchy, the Company considers the principal or most advantageous market in which it would transact and the assumptions that market participants would use when pricing the asset or liability. When possible, the Company looks to active and observable markets to price identical assets or liabilities. When identical assets and liabilities are not traded in active markets, the Company looks to market observable data for similar assets and liabilities. It is the Company’s policy to maximize the use of observable inputs, minimize the use of unobservable inputs and use unobservable inputs to measure fair value to the extent that observable inputs are not available. The need to use unobservable inputs generally results from the lack of market liquidity, resulting in diminished observability of both actual trades and assumptions that would otherwise be available to value these instruments, or the value of the underlying collateral is not market observable. Although third party price indications may be available for an asset or liability, limited trading activity would make it difficult to support the observability of these quotations.

Financial Instruments Carried at Fair Value on a Recurring Basis

The following is a description of the valuation methodologies used for financial instruments measured at fair value on a recurring basis, as well as the general classification of each instrument under the valuation hierarchy.

Investment Securities—Investment securities available for sale are carried at fair value on a recurring basis. When available, fair value is based on quoted prices for the identical security in an active market and as such, would be classified as Level 1. If quoted market prices are not available, fair values are estimated using quoted prices of securities with similar characteristics, discounted cash flows or matrix pricing models. Investment securities available for sale for which Level 1 valuations are not available are classified as Level 2, and include U.S. Government agencies and sponsored enterprises obligations and agency mortgage-backed securities; state and municipal obligations; asset-backed securities; and corporate debt and other securities. Pricing of these securities is generally spread driven.

25

Observable inputs that may impact the valuation of these securities include benchmark yield curves, credit spreads, reported trades, dealer quotes, bids, issuer spreads, current rating, historical constant prepayment rates, historical voluntary prepayment rates, structural and waterfall features of individual securities, published collateral data, and for certain securities, historical constant default rates and default severities.

SBA Servicing Asset—The SBA Servicing Asset is carried at fair value on a recurring basis. To determine the fair value of SBA servicing rights, The Company uses market prices for comparable servicing contracts, when available, or alternatively, uses a valuation model that calculates the present value of estimated future net servicing income. In using this valuation method, the Company incorporates assumptions that market participants would use in estimating future net servicing income, which includes estimates of the cost to service, the discount rate, custodial earnings rate, an inflation rate, ancillary income, prepayment speeds, default rates, late fees and losses. The SBA Servicing Asset is classified as Level 3.

The following table presents the assets and liabilities measured at fair value on a recurring basis:

	September 30, 2018
	Level 1		Level 2		Level 3		Total
	(Dollars in thousands)
Assets:
U.S. Government agencies	$	—	$	1,906	$	—	$	1,906
Residential mortgage-backed securities		—		26,048		—		26,048
Corporate bonds and other debt securities		—		5,495		—		5,495
SBA servicing rights		—		—		3,561		3,561
Total	$	—	$	33,449	$	3,561	$	37,010

	December 31, 2017
	Level 1		Level 2		Level 3		Total
	(Dollars in thousands)
Assets:
U.S. Government agencies	$	—	$	1,949	$	—	$	1,949
Residential mortgage-backed securities		—		29,629		—		29,629
Corporate bonds and other debt securities		—		5,665		—		5,665
SBA servicing rights		—		—		3,411		3,411
Total	$	—	$	37,243	$	3,411	$	40,654

There were no transfers of financial assets between levels of the fair value hierarchy during the three or nine months ended September 30, 2018.

Financial Instruments Measured at Fair Value on a Non-Recurring Basis

The following is a description of the methodologies used to estimate the fair values of assets and liabilities measured at fair value on a non-recurring basis, and the level within the fair value hierarchy in which those measurements are typically classified.

Impaired loans and other real estate owned (“OREO”)—The carrying amount of collateral dependent impaired loans is typically based on the fair value of the underlying collateral, which may be real estate or other business assets, less estimated costs to sell. The carrying value of OREO is initially measured based on the fair value, less estimated cost to sell, of the real estate acquired in foreclosure and subsequently adjusted to the lower of cost or estimated fair value, less estimated cost to sell. Fair values of real estate collateral are typically based on real estate appraisals which utilize market and income valuation techniques incorporating both observable and unobservable inputs. When current appraisals are not available, the Company may use brokers’ price opinions, home price indices, or other available information about changes in real estate market conditions to adjust the latest appraised value available. These adjustments to appraised values may be subjective and involve significant management judgment. The fair value of collateral consisting of other business assets is generally based on appraisals that use market approaches to valuation, incorporating primarily unobservable inputs. Fair value measurements related to collateral dependent impaired loans and OREO are classified within Level 3 of the fair value hierarchy.

26

The following tables provide information about certain assets measured at fair value on a non-recurring basis:

	Estimated Fair Value
	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Assets (classified in Level 3):
Impaired loans	$	1,913	$	2,553
Other real estate and repossessed assets		289		21

Impairment charges resulting from the non-recurring changes in fair value of underlying collateral of impaired loans are included in the provision for loan losses in the consolidated statement of income. Impairment charges resulting from the non-recurring changes in fair value of OREO are included in other real estate and acquired assets resolution expenses in the consolidated statement of income.

The following tables show significant unobservable inputs used in the recurring and non-recurring fair value measurements of Level 3 assets:

Level 3 Asset	Fair Value		Valuation Technique	Unobservable Inputs	Range/Weighted Average
September 30, 2018
Non-recurring:
Impaired loans	$	1,913	Third party appraisals	Collateral discounts	0.0% - 100.0% (84.7%)
Other real estate owned		289	Third party appraisals	Collateral discounts and estimated cost to sell		10.0	%
Recurring:
SBA servicing assets		3,561	Discounted cash flows	Conditional prepayment rate		7.1	%
				Discount rate		14.3	%
December 31, 2017
Non-recurring:
Impaired loans	$	2,553	Third party appraisals	Collateral discounts	0.0% - 100.0% (11.6%)
Other real estate owned		21	Third party appraisals	Collateral discounts and estimated cost to sell		10.0	%
Recurring:
SBA servicing assets		3,411	Discounted cash flows	Conditional prepayment rate		6.7	%
				Discount rate		14.1	%

The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments are as follows:

September 30, 2018	Carrying Value		Fair Value		Level 1		Level 2		Level 3
	(Dollars in thousands)
Financial Assets:
Cash and cash equivalents	$	44,138	$	44,138	$	44,138	$	—	$	—
Time deposits in other banks		245		245		245		—		—
Available for sale securities		33,449		33,449		—		33,449		—
FHLB and other bank stock		4,861		4,861		—		4,861		—
Loans, net		947,918		942,987		—		—		942,987
Loans held for sale		5,500		5,880		—		5,880		—
Accrued interest receivable		3,715		3,715		—		3,715		—
Bank-owned life insurance		483		483		—		483		—
SBA servicing rights		3,561		3,561		—		—		3,561
Financial Liabilities:
Deposits	$	872,610	$	843,522	$	—	$	843,522	$	—
Accrued interest payable		475		475		—		475		—
Short-term borrowings		10,000		10,000		—		10,000		—
Long-term borrowings		64,961		63,233		—		63,233		—

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December 31, 2017	Carrying Value		Fair Value		Level 1		Level 2		Level 3
	(Dollars in thousands)
Financial Assets:
Cash and cash equivalents	$	57,949	$	57,949	$	57,949	$	—	$	—
Time deposits in other banks		245		245		245		—		—
Available for sale securities		37,243		37,243		—		37,243		—
FHLB and other bank stock		4,812		4,812		—		4,812		—
Loans, net		863,467		870,749		—		—		870,749
Loans held for sale		3,814		4,188		—		4,188		—
Accrued interest receivable		3,466		3,466		—		3,466		—
Bank-owned life insurance		479		479		—		479		—
SBA servicing rights		3,411		3,411		—		—		3,411
Financial Liabilities:
Deposits	$	835,368	$	840,645	$	—	$	840,645	$	—
Accrued interest payable		407		407		—		407		—
Short-term borrowings		15,000		15,000		—		15,000		—
Long-term borrowings		76,411		67,310		—		67,310		—

Certain financial instruments are carried at amounts that approximate fair value due to their short-term nature and generally negligible credit risk. Financial instruments for which fair value approximates the carrying amount at September 30, 2018 and December 31, 2017, include cash and cash equivalents, time deposits in other banks and accrued interest receivable and payable.

The following methods and assumptions were used to estimate the fair value of each class of financial instruments.

FHLB and Other Bank Stock:

FHLB and other bank stock can be liquidated only by redemption by the issuer, as there is no market for these securities. These securities are carried at par, which has historically represented the redemption price and is therefore considered to approximate fair value.

Loans:

Fair values for loans are based on a discounted cash flow methodology that considers various factors, including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan, whether or not the loan was amortizing and current discount rates. A basis point adjustment for the liquidity premium curve was added to the discounted cash flow methodology to obtain the estimated exit price of the portfolio.  Loans are grouped together according to similar characteristics and are treated in the aggregate when applying various valuation techniques. The discount rates used for loans are based on current market rates for new originations of comparable credit risk and include adjustments for liquidity concerns. The allowance for loan and lease losses is considered a reasonable estimate of the required adjustment to fair value to reflect the impact of credit risk. This estimate is intended to represent an exit value as defined in ASC 820.

Loans Held for Sale:

SBA loans held for sale are carried at the lower of cost or fair value. The fair values of SBA loans held for sale is determined, when possible, using quoted secondary-market prices and are classified within Level 2 of the fair value hierarchy. If no such quoted prices exist, the fair value of a loan is determined using quoted prices for a similar loan or loans, adjusted for the specific attributes of that loan.  

Bank-owned Life Insurance:

The Company holds life insurance policies on certain officers. The carrying value of these policies approximates fair value as it is based on the cash surrender value adjusted for other charges or amounts due that are probable at settlement.

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Deposits:

The fair value of demand deposits, savings accounts and money market deposits is the amount payable on demand at the reporting date. The fair value of fixed-maturity certificates of deposit is estimated using discounted cash flow analysis and using the rates currently offered for deposits of similar remaining maturities.

Short-term and Long-term Borrowings:

The fair value of advances from the FHLB and other borrowings are estimated by discounting the future cash flows using the current rate at which similar borrowings with similar remaining maturities could be obtained.

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

The following discussion and analysis is intended to assist readers in understanding our financial condition as of and results of operations for the three and nine months ended September 30, 2018 and should be read in conjunction with our consolidated financial statements and the accompanying notes thereto included in this Quarterly Report on Form 10-Q (this “Form 10-Q”) and in our prospectus filed with the Securities and Exchange Commission (“SEC”) pursuant to Rule 424(b) of the Securities Act of 1933, as amended, on May 4, 2018, related to our initial public offering. Unless we state otherwise or the context otherwise requires, references in this Form 10-Q to “we,” “our,” “us” and “our company” refer to Spirit of Texas Bancshares, Inc., a Texas corporation, and our wholly-owned banking subsidiary, Spirit of Texas Bank SSB, a Texas state savings bank. References in this Form 10-Q to “Bank” refer to Spirit of Texas Bank SSB. References in this Form 10-Q to “Houston metropolitan area,” “Dallas/Fort Worth metropolitan area” and “Bryan/College Station metropolitan area” refer to the Houston-The Woodlands-Sugar Land Metropolitan Statistical Area, the Dallas-Fort Worth- Arlington Metropolitan Statistical Area and the College Station-Bryan Metropolitan Statistical Area, respectively.

o Cautionary Notice Regarding Forward-Looking Statements

Statements and financial discussion and analysis contained in this Form 10-Q that are not historical facts are forward-looking statements made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. We also may make forward-looking statements in our other documents filed with or furnished to the SEC. In addition, our senior management may make forward-looking statements orally to investors, analysts, representatives of the media and others. These statements are often, but not always, preceded by, followed by or otherwise include the words “believes,” “expects,” “anticipates,” “intends,” “projects,” “estimates,” “plans” and similar expressions or future or conditional verbs such as “will,” “should,” “would,” “may” and “could” or the negative version of those words or other comparable words or phrases of a future or forward-looking nature. These forward-looking statements are not historical facts and are based on current expectations, estimates and projections about our industry, management’s beliefs and certain assumptions made by management, many of which, by their nature, are inherently uncertain and beyond our control. Accordingly, we caution you that any such forward-looking statements are not guarantees of future performance and are subject to risks, assumptions and uncertainties that are difficult to predict. Although we believe that the expectations reflected in these forward-looking statements are reasonable as of the date made, actual results may prove to be materially different from the results expressed or implied by the forward-looking statements.

We have made the forward-looking statements in this Form 10-Q based on assumptions and estimates that we believe to be reasonable in light of the information available to us at this time. However, these forward-looking statements are subject to significant risks and uncertainties, and could be affected by many factors. These factors include, but are not limited to, the following:

1. risks related to the concentration of our business in Texas, and in the Houston and Dallas/Fort Worth metropolitan areas in particular, including risks associated with any downturn in the real estate sector and risks associated with a decline in the values of single family homes in our Texas markets;

2. general market conditions and economic trends nationally, regionally and particularly in our Texas markets, including a decrease in or the volatility of oil and gas prices;

3. risks related to our concentration in our primary markets, which are susceptible to severe weather events that could negatively impact the economies of our markets, our operations or our customers, any of which could have a material adverse effect on our business, financial condition and results of operations;

4. our ability to implement our growth strategy, including identifying and consummating suitable acquisitions;

5. risks related to the integration of any acquired businesses, including exposure to potential asset quality and credit quality risks and unknown or contingent liabilities, the time and costs associated with integrating systems, technology platforms, procedures and personnel, the need for additional capital to finance such transactions, and possible failures in realizing the anticipated benefits from acquisitions;

6. changes in Small Business Administration, or SBA, loan products, including specifically the Section 7(a) program and Section 504 loans, or changes in SBA standard operating procedures;

7. risks associated with our loans to and deposit accounts from foreign nationals;

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8. risks associated with the relatively unseasoned nature of a significant portion of our loan portfolio;

9. the accuracy and sufficiency of the assumptions and estimates we make in establishing reserves for potential loan losses and other estimates;

10. the risk of deteriorating asset quality and higher loan charge-offs;

11. risks related to the significant amount of credit that we have extended to a limited number of borrowers and in a limited geographic area;

12. our ability to maintain adequate liquidity and to raise necessary capital to fund our acquisition strategy and operations or to meet increased minimum regulatory capital levels;

13. material decreases in the amount of deposits we hold, or a failure to grow our deposit base as necessary to help fund our growth and operations;

14. changes in market interest rates that affect the pricing of our loans and deposits and our net interest income;

15. potential fluctuations in the market value and liquidity of our investment securities;

16. the effects of competition from a wide variety of local, regional, national and other providers of financial, investment and insurance services;

17. our ability to maintain an effective system of disclosure controls and procedures and internal controls over financial reporting;

18. risks associated with fraudulent, negligent, or other acts by our customers, employees or vendors;

19. our ability to keep pace with technological change or difficulties when implementing new technologies;

20. risks associated with system failures or failures to protect against cybersecurity threats, such as breaches of our network security;

21. risks associated with data processing system failures and errors;

22. potential impairment on the goodwill we have recorded or may record in connection with business acquisitions;

23. the initiation and outcome of litigation and other legal proceedings against us or to which we become subject;

24. our ability to comply with various governmental and regulatory requirements applicable to financial institutions, including regulatory requirements to maintain minimum capital levels;

25. the impact of recent and future legislative and regulatory changes, including changes in banking, securities and tax laws and regulations and their application by our regulators, such as the implementation of the Economic Growth, Regulatory Relief and Consumer Protection Act;

26. governmental monetary and fiscal policies, including the policies of the Board of Governors of the Federal Reserve System, or the Federal Reserve;

27. our ability to comply with supervisory actions by federal and state banking agencies;

28. changes in the scope and cost of Federal Deposit Insurance Corporation, or the FDIC, insurance and other coverage; and

29. systemic risks associated with the soundness of other financial institutions.

30. the businesses of Spirit and Comanche may not be combined successfully, or such combination may take longer to accomplish than expected;

31. the cost savings from the transaction may not be fully realized or may take longer to realize than expected;

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32. operating costs, customer loss and business disruption following the transaction, including adverse effects on relationships with employees, may be greater than expected;

33. governmental approvals of the transaction may not be obtained, or adverse regulatory conditions may be imposed in connection with governmental approvals of the transaction;

34. the companies’ respective shareholders may not approve the transaction;

35. competition from other financial services companies in Spirit’s and Comanche’s respective markets.

Other factors not identified above, including those described under the heading “Risk Factors” in our prospectus filed with the SEC pursuant to Rule 424(b) of the Securities Act of 1933, as amended, on May 4, 2018, related to our initial public offering, and the “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this Form 10-Q, may also cause our results to differ materially from the anticipated or estimated results described in our forward-looking statements. The foregoing factors should not be construed as exhaustive, and you should consider these factors in connection with considering any forward-looking statements that may be made by us. If one or more events related to these or other risks or uncertainties materialize, or if our underlying assumptions prove to be incorrect, actual results may differ materially from what we anticipate. Accordingly, you should not place undue reliance on any such forward-looking statements. Any forward-looking statements speaks only as of the date on which it is made, and we undertake no obligation to release publicly any revisions to any forward-looking statements, to report events or to report the occurrence of unanticipated events unless we are required to do so by law.

Overview

We are a Texas corporation and a registered bank holding company located in the Houston metropolitan area with headquarters in Conroe, Texas. We offer a broad range of commercial and retail banking services through our wholly-owned bank subsidiary, Spirit of Texas Bank SSB. We operate through 15 full-service branches located primarily in the Houston and Dallas/Fort Worth metropolitan areas. As of September 30, 2018, we had total assets of $1.10 billion, loans held for investment of $954.1 million, total deposits of $872.6 million and total stockholders’ equity of $150.9 million.

As a bank holding company, we generate most of our revenues from interest income on loans, gains on sale of the guaranteed portion of SBA loans, customer service and loan fees, brokerage fees derived from secondary mortgage originations and interest income from investments in securities. We incur interest expense on deposits and other borrowed funds and noninterest expenses, such as salaries and employee benefits and occupancy expenses. Our goal is to maximize income generated from interest-earning assets, while also minimizing interest expense associated with our funding base to widen net interest spread and drive net interest margin expansion. Net interest margin is a ratio calculated as net interest income divided by average interest-earning assets. Net interest income is the difference between interest income on interest-earning assets, such as loans and securities, and interest expense on interest-bearing liabilities, such as deposits and borrowings that are used to fund those assets. Net interest spread is the difference between rates earned on interest-earning assets and rates paid on interest-bearing liabilities.

Changes in market interest rates and the interest rates we earn on interest-earning assets or pay on interest-bearing liabilities, as well as the volume and types of interest-earning assets, interest-bearing and noninterest-bearing liabilities and stockholders’ equity, are usually the largest drivers of periodic changes in net interest spread, net interest margin and net interest income. Fluctuations in market interest rates are driven by many factors, including governmental monetary policies, inflation, deflation, macroeconomic developments, changes in unemployment, the money supply, political and international conditions and conditions in domestic and foreign financial markets. Periodic changes in the volume and types of loans in our loan portfolio are affected by, among other factors, economic and competitive conditions in Texas, as well as developments affecting the real estate, technology, financial services, insurance, transportation, manufacturing and energy sectors within our target markets and throughout Texas.

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Recent Developments

During the three months ended March 31, 2018, to expand our lending capacities, we hired six senior lenders in the Houston and Dallas/Fort Worth metropolitan areas. Collectively, they have 132 years of banking experience in their respective markets. Additionally, we hired a deposit sourcing specialist in the Bryan/College Station market. We expect these professionals will generate and maintain meaningful portfolios, while also continuing our focus on increasing core deposits to fund loan growth. We intend to continue to seek out talented bankers that are a good cultural fit and have long standing business relationships in our markets.

In February 2018, we relocated one location in The Woodlands to a newly acquired office location in The Woodlands located at 30350 F.M. 2978, Magnolia, Texas 77354. In addition, in April of 2018, we relocated our Dallas and Fort Worth branches. Our new Dallas branch is located at 5301 Spring Valley Road, Dallas, Texas 75254. Our new Fort Worth branch is located at 1120 Summit Avenue, Fort Worth, Texas 76102. We believe these relocations will allow us to better serve our customers in the Houston metropolitan area and the Dallas/Fort Worth metropolitan area, while also enhancing the visibility of our franchise.

We consummated the underwritten initial public offering of our common stock in May 2018. Our common stock is traded on the NASDAQ Global Select Market under the ticker symbol “STXB.” In connection with our initial public offering, we issued and sold 2,300,000 shares of our common stock, including 300,000 shares of common stock sold pursuant to the underwriters’ full exercise of their option to purchase additional shares, at an offering price of $21.00 per share, for aggregate gross proceeds of $48.3 million before deducting underwriting discounts and offering expenses, and aggregate net proceeds of $42.1 million after deducting underwriting discounts and offering expenses. As of the date hereof, we used $7.8 million of net proceeds from this offering to repay in full the outstanding indebtedness under our line of credit with a third party lender, plus accrued and unpaid interest.  For a description of the line of credit see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Financial Condition—Borrowings.”  We intend to use the remaining net proceeds to support our continued growth, including organic growth and potential future acquisitions [such as the acquisition of Comanche National Corporation (“Comanche”),] and for general corporate purposes.  

On July 19, 2018, the Company and Comanche, entered into an Agreement and Plan of Reorganization (the “Reorganization Agreement”) providing for the acquisition by the Company of Comanche pursuant to the merger of Comanche with and into the Company, with the Company surviving the merger. Pursuant to the terms and subject to the conditions of the Reorganization Agreement, which has been approved by the boards of directors of each of the Company and Comanche, the transaction provides for the payment to Comanche shareholders of an estimated $12.2 million in cash and 2,142,857 shares of the Company’s common stock, subject to certain adjustments. The transaction is expected to close in the fourth quarter of 2018, subject to the satisfaction of customary closing conditions, including the receipt of regulatory approvals and the approvals of the Company’s and Comanche’s respective shareholders.  

Results of Operations

Our results of operations depend substantially on net interest income and noninterest income. Other factors contributing to our results of operations include our level of our noninterest expenses, such as salaries and employee benefits, occupancy and equipment and other miscellaneous operating expenses.

Net Interest Income

Net interest income represents interest income less interest expense. We generate interest income from interest, dividends and fees received on interest-earning assets, including loans and investment securities we own. We incur interest expense from interest paid on interest-bearing liabilities, including interest-bearing deposits and borrowings. To evaluate net interest income, we measure and monitor (1) yields on our loans and other interest-earning assets, (2) the costs of our deposits and other funding sources, (3) our net interest spread, (4) our net interest margin and (5) our provisions for loan losses. Net interest spread is the difference between rates earned on interest-earning assets and rates paid on interest-bearing liabilities. Net interest margin is calculated as the annualized net interest income divided by average interest-earning assets. Because noninterest-bearing sources of funds, such as noninterest-bearing deposits and stockholders’ equity, also fund interest-earning assets, net interest margin includes the benefit of these noninterest-bearing sources.

Changes in market interest rates and the interest rates we earn on interest-earning assets or pay on interest-bearing liabilities, as well as the volume and types of interest-earning assets, interest-bearing and noninterest-bearing deposits and stockholders’ equity, are usually the largest drivers of periodic changes in net interest spread, net interest margin and net interest income. We measure net interest income before and after provision for loan losses required to maintain our allowance for loan and lease losses at acceptable levels.

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Noninterest Income

Our noninterest income includes the following: (1) service charges and fees; (2) SBA loan servicing fees; (3) mortgage referral fees; (4) gain on the sales of loans, net; (5) gain (loss) on sales of other assets; and (6) other.

Noninterest Expense

Our noninterest expense includes the following: (1) salaries and employee benefits; (2) occupancy and equipment expenses; (3) loan and other real estate related expenses; (4) professional services; (5) data processing and network; (6) regulatory assessments and insurance; (7) amortization of core deposit intangibles; (8) advertising; (9) marketing; (10) telephone expenses; and (11) other.

Financial Condition

The primary factors we use to evaluate and manage our financial condition include liquidity, asset quality and capital.

Liquidity

We manage liquidity based upon factors that include the amount of core deposits as a percentage of total deposits, the level of diversification of our funding sources, the allocation and amount of our deposits among deposit types, the short-term funding sources used to fund assets, the amount of non-deposit funding used to fund assets, the availability of unused funding sources, off-balance sheet obligations, the availability of assets to be readily converted into cash without undue loss, the amount of cash and liquid securities we hold, and the repricing characteristics and maturities of our assets when compared to the repricing characteristics of our liabilities, the ability to securitize and sell certain pools of assets and other factors.

Asset Quality

We manage the diversification and quality of our assets based upon factors that include the level, distribution, severity and trend of problem, classified, delinquent, nonaccrual, nonperforming and restructured assets, the adequacy of our allowance for loan and lease losses, discounts and reserves for unfunded loan commitments, the diversification and quality of loan and investment portfolios and credit risk concentrations.

Capital

We manage capital based upon factors that include the level and quality of capital and our overall financial condition, the trend and volume of problem assets, the adequacy of discounts and reserves, the level and quality of earnings, the risk exposures in our balance sheet, the levels of Tier 1 (core), risk-based and tangible equity capital, the ratios of tier 1 (core), risk-based and tangible equity capital to total assets and risk-weighted assets and other factors.

Performance Highlights

Operating and financial highlights for the three months ended September 30, 2018 include the following:

• Net Income increased to $2.8 million. Adjusted net income was $3.0 million for the third quarter of 2018, which excluded $215 thousand of after-tax merger related expenses.  

• Diluted earnings per share were $0.27 in the third quarter of 2018. Adjusted diluted earnings per share were $0.29 for the third quarter of 2018 which excluded $215 thousand of after-tax merger related expenses.

• Net Interest Margin and Tax Equivalent Net Interest Margin were 4.60% and 4.65%, respectively.

• Noninterest-bearing deposit growth of $24.1 million or 52.1% annualized.

• Organic loan growth of $36.6 million or 15.8% annualized.

• Return on Average Assets was 1.01%, annualized.

• Book value per share was $15.38 in the third quarter of 2018. Tangible book value per share was $14.62 in the third quarter of 2018.

Tax equivalent net interest margin, adjusted net income, adjusted diluted earnings per share and tangible book value per share are non-GAAP financial measures. See our reconciliation of non-GAAP financial measures to their most directly comparable GAAP financial measures under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures.”

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Analysis of Results of Operations

Net income for the three months ended September 30, 2018 totaled $2.8 million, which generated diluted earnings per common share of $0.27 for the three months ended September 30, 2018. Adjusted net income for the three months ended September 30, 2018 totaled $3.0 million which excluded $215 thousand of after-tax merger related expenses, which generated diluted earnings per common share of $0.29. Net income for the three months ended September 30, 2017 totaled $2.0 million, which generated diluted earnings per common share of $0.26 for the three months ended September 30, 2017. The increase in net income was driven by an increase in interest income of $2.0 million that was primarily attributable to increasing loan yields, partially offset by an increase in noninterest expense of $1.7 million, which was mainly the result of an increase in salaries and benefits expense. Our results of operations for the three months ended September 30, 2018 produced an annualized return on average assets of 1.01% compared to an annualized return on average assets of 0.78% for the three months ended September 30, 2017. We had an annualized return on average stockholders’ equity of 7.34% for the three months ended September 30, 2018, compared to an annualized return on average stockholders’ equity of 7.78% for the three months ended September 30, 2017.

Net income for the nine months ended September 30, 2018 totaled $7.5 million, which generated diluted earnings per common share of $0.86 for the nine months ended September 30, 2018. Adjusted net income for the nine months ended September 30, 2018 totaled $7.7 million which excluded $215 thousand of after-tax merger related expenses, which generated diluted earnings per common share of $0.84. Net income for the nine months ended September 30, 2017 totaled $4.2 million, which generated diluted earnings per common share of $0.56 for the nine months ended September 30, 2017. The increase in net income was driven by an increase in interest income of $5.8 million that was primarily attributable to increasing loan yields, partially offset by an increase in interest expense of 1.2 million and an increase in noninterest expense of $1.8 million. The increase in interest expense was primarily due to an increase in interest rates by the Federal Open Market Committee during 2017 and 2018. The increase in noninterest expense was mainly the result of an increase in salaries and benefits expense. Our results of operations for the nine months ended September 30, 2018 produced an annualized return on average assets of 0.94% compared to an annualized return on average assets of 0.56% for the nine months ended September 30, 2017. We had an annualized return on average stockholders’ equity of 8.08% for the nine months ended September 30, 2018, compared to an annualized return on average stockholders’ equity of 5.64% for the nine months ended September 30, 2017.

Net Interest Income and Net Interest Margin

The following table presents, for the periods indicated, information about (1) average balances, the total dollar amount of interest income from interest-earning assets and the resultant average yields; (2) average balances, the total dollar amount of interest expense on interest-bearing liabilities and the resultant average rates; (3) the interest rate spread; (4) net interest income and margin; and (5) net interest income and margin (tax equivalent). Interest earned on loans that are classified as nonaccrual is not recognized in income, however the balances are reflected in average outstanding balances for that period. Any nonaccrual loans have been included in the table as loans carrying a zero yield.

	Three Months Ended September 30,
	2018							2017
	Average Balance (1)		Interest/ Expense		Annualized Yield/Rate			Average Balance (1)		Interest/ Expense		Annualized Yield/Rate
	(Dollars in thousands)
Interest-earning assets:
Interest-earning deposits in other banks	$	24,007	$	140		2.32	%	$	50,443	$	157		1.23	%
Loans, including loans held for sale (2)		944,429		13,901		5.84	%		867,634		11,842		5.41	%
Investment securities and other		39,056		235		2.38	%		43,845		245		2.22	%
Total interest-earning assets		1,007,492		14,276		5.62	%		961,922		12,244		5.05	%
Noninterest-earning assets		77,988							61,635
Total assets	$	1,085,480						$	1,023,557
Interest-bearing liabilities:
Interest-bearing NOW accounts	$	7,932	$	3		0.15	%	$	8,634	$	3		0.14	%
Savings and money market accounts		212,511		338		0.63	%		242,289		340		0.56	%
Time deposits		442,149		1,856		1.67	%		423,390		1,341		1.26	%
FHLB advances and other borrowings		77,471		389		1.99	%		73,056		405		2.20	%
Total interest-bearing liabilities		740,063		2,586		1.39	%		747,369		2,089		1.11	%
Noninterest-bearing liabilities and    shareholders' equity:
Noninterest-bearing demand deposits		192,408							170,083
Other liabilities		3,182							3,963
Stockholders' equity		149,827							102,142
Total liabilities and stockholders' equity	$	1,085,480						$	1,023,557
Net interest rate spread						4.23	%						3.94	%
Net interest income and margin			$	11,690		4.60	%			$	10,155		4.19	%

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Net interest income and margin (tax equivalent)(3) $ 11,803 4.65 % $ 10,395 4.29 %

(1) Average balances presented are derived from daily average balances.

(2) Includes loans on nonaccrual status.

(3) In order to make pretax income and resultant yields on tax-exempt loans comparable to those on taxable loans, a tax-equivalent adjustment has been computed using a federal tax rate of 21% for the three months ended September 30, 2018 and a federal tax rate of 34% for the three months ended September 30, 2017, which is a non-GAAP financial measure. See our reconciliation of non-GAAP financial measures to their most directly comparable GAAP financial measures under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures.”

	Nine Months Ended September 30,
	2018							2017
	Average Balance (1)		Interest/ Expense		Annualized Yield/Rate			Average Balance (1)		Interest/ Expense		Annualized Yield/Rate
	(Dollars in thousands)
Interest-earning assets:
Interest-earning deposits in other banks	$	31,102	$	448		1.92	%	$	89,681	$	680		1.01	%
Loans, including loans held for sale (2)		910,237		39,270		5.77	%		827,847		33,515		5.41	%
Investment securities and other		40,140		699		2.33	%		29,249		420		1.92	%
Total interest-earning assets		981,479		40,417		5.51	%		946,777		34,615		4.89	%
Noninterest-earning assets		76,332							60,081
Total assets	$	1,057,811						$	1,006,858
Interest-bearing liabilities:
Interest-bearing NOW accounts	$	7,928	$	9		0.15	%	$	8,291	$	9		0.15	%
Savings and money market accounts		223,159		1,016		0.61	%		233,471		991		0.57	%
Time deposits		430,369		4,844		1.50	%		431,278		3,913		1.21	%
FHLB advances and other borrowings		85,472		1,395		2.18	%		68,339		1,180		2.31	%
Total interest-bearing liabilities		746,928		7,264		1.30	%		741,379		6,093		1.10	%
Noninterest-bearing liabilities and    shareholders' equity:
Noninterest-bearing demand deposits		183,658							161,861
Other liabilities		3,645							3,385
Stockholders' equity		123,580							100,233
Total liabilities and stockholders' equity	$	1,057,811						$	1,006,858
Net interest rate spread						4.21	%						3.79	%
Net interest income and margin			$	33,153		4.52	%			$	28,522		4.03	%
Net interest income and margin (tax equivalent)(3)			$	33,497		4.56	%			$	29,224		4.13	%

(1) Average balances presented are derived from daily average balances.

(2) Includes loans on nonaccrual status.

(3) In order to make pretax income and resultant yields on tax-exempt loans comparable to those on taxable loans, a tax-equivalent adjustment has been computed using a federal tax rate of 21% for the nine months ended September 30, 2018 and a federal tax rate of 34% for the nine months ended September 30, 2017, which is a non-GAAP financial measure. See our reconciliation of non-GAAP financial measures to their most directly comparable GAAP financial measures under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures.”

Increases and decreases in interest income and interest expense result from changes in average balances (volume) of interest-earning assets and liabilities, as well as changes in average interest rates. The following table shows the effect that these factors had on the interest earned on our interest-earning assets and the interest incurred on our interest-bearing liabilities for the periods indicated. The effect of changes in volume is determined by multiplying the change in volume by the prior period’s average rate. Similarly, the effect of rate changes is calculated by multiplying the change in average rate by the prior period’s volume.

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A summary of increases and decreases in interest income and interest expense resulting from changes in average balances (volume) and average interest rates follows:

	Three Months Ended September 30, 2018 compared to 2017
	Increase (Decrease) Due to
	Volume (1)			Rate (1)			Total
	(Dollars in thousands)
Interest-earning assets:
Interest-earning deposits in other banks	$	(415	)	$	398		$	(17	)
Loans, including loans held for sale (2)		1,085			974			2,059
Investment securities and other		(90	)		80			(10	)
Total change in interest income	$	580		$	1,452		$	2,032
Interest-bearing liabilities:
Interest-bearing NOW accounts		(1	)		1			—
Savings and money market accounts		(169	)		167			(2	)
Time deposits		62			453			515
FHLB advances and other borrowings		113			(129	)		(16	)
Total change in interest expenses		5			492			497
Total change in net interest income	$	575		$	960		$	1,535

(1) Variances attributable to both volume and rate are allocated on a consistent basis between rate and volume based on the absolute value of the variances in each category.

(2) Includes loans on nonaccrual status.

	Nine Months Ended September 30, 2018 compared to 2017
	Increase (Decrease) Due to
	Volume (1)			Rate (1)			Total
	(Dollars in thousands)
Interest-earning assets:
Interest-earning deposits in other banks	$	(784	)	$	552		$	(232	)
Loans, including loans held for sale (2)		3,449			2,306			5,755
Investment securities and other		177			102			279
Total change in interest income	$	2,842		$	2,960		$	5,802
Interest-bearing liabilities:
Interest-bearing NOW accounts		—			—			—
Savings and money market accounts		(62	)		87			25
Time deposits		(14	)		945			931
FHLB advances and other borrowings		321			(106	)		215
Total change in interest expenses		245			926			1,171
Total change in net interest income	$	2,597		$	2,034		$	4,631

(1) Variances attributable to both volume and rate are allocated on a consistent basis between rate and volume based on the absolute value of the variances in each category.

(2) Includes loans on nonaccrual status.

Three months ended September 30, 2018 compared to three months ended September 30, 2017

Net interest income was $11.7 million for the three months ended September 30, 2018 compared to $10.2 million for the three months ended September 30, 2017, representing an increase of $1.5 million, or 15.1%. The increase in net interest income was primarily due to an increase in interest income of $2.0 million partially offset by an increase in interest expense of $497 thousand. Interest income on loans increased by $2.1 million for the three months ended September 30, 2018. The growth in average loans of $76.8 million, including loans held for sale, for the three months ended September 30, 2018 was the primary driver of the increase in interest income on loans, as well as an increase in the average rate on loans of 43 basis points over the same period.

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Interest expense was $2.6 million for the three months ended September 30, 2018 compared to $2.1 million for the three months ended September 30, 2017, representing an increase of $497 thousand. This increase was mainly due to an increase in interest expense on deposits. Interest expense on deposits totaled $2.2 million for the three months ended September 30, 2018 compared to $1.7 million for the three months ended September 30, 2017, representing an increase of $513 thousand, resulting primarily from an increase in the average rate paid on time deposits of 41 basis points for the three months ended September 30, 2018 over the three months ended September 30, 2017. The average cost of deposits for the three months ended September 30, 2018 was 1.02%. This represents an increase of 23 basis points compared to the average cost of deposits of 0.79% for the three months ended September 30, 2017. The increase in cost of deposits was primarily attributable to the increase in interest rates by the Federal Open Market Committee during 2017 and 2018. For the three months ended September 30, 2018, the average rate paid on time deposits was 1.67% compared to 1.26% for the three months ended September 30, 2017.

The net interest margin was 4.60% for the three months ended September 30, 2018 compared to 4.19% for the three months ended September 30, 2017, representing an increase of 41 basis points. The tax equivalent net interest margin was 4.65% for the three months ended September 30, 2018 compared to 4.29% for the three months ended September 30, 2017, representing an increase of 36 basis points. The average yield on interest-earning assets increased by 57 basis points for the three months ended September 30, 2018 compared to the three months ended September 30, 2017 while the average rate paid on interest-bearing liabilities increased by 28 basis points, resulting in a 29 basis point increase in the interest rate spread. The increase in both net interest margin and interest rate spread primarily resulted from the shift in assets from low yielding interest-earning deposits in other banks to higher yielding loans for the three months ended September 30, 2018.

Nine months ended September 30, 2018 compared to nine months ended September 30, 2017

Net interest income was $33.2 million for the nine months ended September 30, 2018 compared to $28.5 million for the nine months ended September 30, 2017, representing an increase of $4.6 million, or 16.2%. The increase in net interest income was primarily due to an increase in interest income of $5.8 million partially offset by an increase in interest expense of $1.2 million. Interest income on loans increased by $5.8 million for the nine months ended September 30, 2018. The growth in average loans of $82.4 million, including loans held for sale, for the nine months ended September 30, 2018 was the primary driver of the increase in interest income on loans, as well as an increase in the average rate on loans of 36 basis points over the same period.

Interest expense was $7.3 million for the nine months ended September 30, 2018 compared to $6.1 million for the nine months ended September 30, 2017, representing an increase of $1.2 million. This increase was mainly due to an increase in interest expense on deposits and FHLB advances and other borrowings. Interest expense on deposits totaled $5.9 million for the nine months ended September 30, 2018 compared to $4.9 million for the nine months ended September 30, 2017, representing an increase of $956 thousand, resulting primarily from an increase in the average rate paid on time deposits of 29 basis points for the nine months ended September 30, 2018 over the nine months ended September 30, 2017. The average cost of deposits for the nine months ended September 30, 2018 was 0.93%. This represents an increase of 14 basis points compared to the average cost of deposits of 0.79% for the nine months ended September 30, 2017. The increase in cost of deposits was primarily attributable to the increase in interest rates by the Federal Open Market Committee during 2017 and 2018. For the nine months ended September 30, 2018, the average rate paid on time deposits was 1.50% compared to 1.21% for the nine months ended September 30, 2017.

Interest expense on FHLB advances and other borrowings increased by $215 thousand for the nine months ended September 30, 2018 compared to the nine months ended September 30, 2017. The increase was attributable to an increase in the average balance of FHLB advances and other borrowings of $17.1 million for the nine months ended September 30, 2018.

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The net interest margin was 4.52% for the nine months ended September 30, 2018 compared to 4.03% for the nine months ended September 30, 2017, representing an increase of 49 basis points. The tax equivalent net interest margin was 4.56% for the nine months ended September 30, 2018 compared to 4.13% for the nine months ended September 30, 2017, representing an increase of 43 basis points. The average yield on interest-earning assets increased by 62 basis points for the nine months ended September 30, 2018 compared to the nine months ended September 30, 2017 while the average rate paid on interest-bearing liabilities increased by 20 basis points, resulting in a 42 basis point increase in the interest rate spread. The increase in both net interest margin and interest rate spread primarily resulted from the shift in assets from low yielding interest-earning deposits in other banks to higher yielding loans for the nine months ended September 30, 2018.

Provision for Loan Losses

The provision for loan losses represents the amount determined by management to be necessary to maintain the allowance for loan and lease losses at a level capable of absorbing inherent losses in the loan portfolio. See the discussion under “—Critical Accounting Policies—Allowance for Loan and Lease Losses.” Our management and board of directors review the adequacy of the allowance for loan and lease losses on a quarterly basis. The allowance for loan and lease losses calculation is segregated by call report code and then further segregated into various segments that include classified loans, loans with specific allocations and pass rated loans. A pass rated loan is generally characterized by a very low to average risk of default and in which management perceives there is a minimal risk of loss. Loans are rated using a nine-point risk grade scale by loan officers that are subject to validation by a third party loan review or our internal credit committee. Risk ratings are categorized as pass, watch, special mention, substandard, doubtful and loss, with some general allocation of reserves based on these grades. Impaired loans are reviewed specifically and separately under the Financial Accounting Standards Board (“FASB”)’s Accounting Standards Codification (“ASC”) 310, “Receivables”, to determine the appropriate reserve allocation. Management compares the investment in an impaired loan with the present value of expected future cash flow discounted at the loan’s effective interest rate, the loan’s observable market price or the fair value of the collateral, if the loan is collateral-dependent, to determine the specific reserve allowance. Reserve percentages assigned to non-impaired loans are based on historical charge-off experience adjusted for other risk factors. To evaluate the overall adequacy of the allowance to absorb losses inherent in our loan portfolio, our management considers historical loss experience based on volume and types of loans, trends in classifications, volume and trends in delinquencies and nonaccruals, economic conditions and other pertinent information. Based on future evaluations, additional provisions for loan losses may be necessary to maintain the allowance for loan and lease losses at an appropriate level.

Three months ended September 30, 2018 compared to three months ended September 30, 2017

The provision for loan losses was $486 thousand for the three months ended September 30, 2018 and $604 thousand for the three months ended September 30, 2017. The ratio of net charged-off loans to average loans (annualized) was 0.14% for the three months ended September 30, 2018 and 0.01% for the three months ended September 30, 2017.

Nine months ended September 30, 2018 compared to nine months ended September 30, 2017

The provision for loan losses was $1.5 million for the nine months ended September 30, 2018 and $1.8 million for the nine months ended September 30, 2017. The ratio of net charged-off loans to average loans (annualized) was 0.14% for the nine months ended September 30, 2018 and 0.11% for the nine months ended September 30, 2017.

Our management maintains a proactive approach in managing nonperforming loans, which were $3.7 million, or 0.39% of loans held for investment, at September 30, 2018, and $3.6 million, or 0.41% of loans held for investment, at December 31, 2017. The allowance for loan and lease losses totaled $6.2 million, or 0.65% of loans held for investment, at September 30, 2018 compared to $5.7 million, or 0.65% of loans held for investment, at December 31, 2017. The ratio of allowance for loan and lease losses to nonperforming loans was 164.42% at September 30, 2018, compared to 157.22% at December 31, 2017.

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Noninterest Income

Our noninterest income includes the following: (1) service charges and fees; (2) SBA loan servicing fees; (3) mortgage referral fees; (4) gain on the sales of loans, net; (5) gain (loss) on sales of other assets; and (6) other.

The following table presents a summary of noninterest income by category, including the percentage change in each category, for the periods indicated:

	Three Months Ended September 30,								Nine Months Ended September 30,
	2018		2017			Change from the Prior Period			2018			2017			Change from the Prior Period
Noninterest income:
Service charges and fees		462		362			27.6	%		1,238			1,095			13.1	%
SBA loan servicing fees		529		207			155.6	%		1,701			1,378			23.4	%
Mortgage referral fees		160		158			1.3	%		524			531			-1.3	%
Gain on sales of loans, net		1,369		1,392			-1.7	%		3,884			4,710			-17.5	%
Gain (loss) on sales of other assets		-		(70	)		-100.0	%		(25	)		(47	)		-46.8	%
Other noninterest income		47		44			6.8	%		136			55			147.3	%
Total noninterest income	$	2,567	$	2,093			22.6	%	$	7,458		$	7,722			-3.4	%

Three months ended September 30, 2018 compared to three months ended September 30, 2017

For the three months ended September 30, 2018, noninterest income totaled $2.6 million, a $474 thousand, or 22.6%, increase from $2.1 million for the prior period. This increase was primarily due to an increase in SBA loan servicing fees of $322 thousand.

SBA loan servicing fees were $529 thousand for the three months ended September 30, 2018 compared to $207 thousand for the three months ended September 30, 2017, primarily due to an increase in the number of loans being serviced.

Nine months ended September 30, 2018 compared to nine months ended September 30, 2017

For the nine months ended September 30, 2018, noninterest income totaled $7.5 million, a $264 thousand, or 3.4%, decrease from $7.7 million for the prior period. This decrease was primarily due to a decrease in gain on sales of loans, net of $826 thousand, offset by an increase in SBA servicing fees of $323 thousand.

Gain on sales of loans, net, was $3.9 million for the nine months ended September 30, 2018 compared to $4.7 million for the nine months ended September 30, 2017, primarily due to increased premiums being offered in the first half of 2017.

SBA loan servicing fees were $1.7 million for the nine months ended September 30, 2018 compared to $1.4 million for the nine months ended September 30, 2017, primarily due to an increase in the number of loans being serviced.

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Noninterest Expense

Our noninterest expense includes the following: (1) salaries and employee benefits; (2) occupancy and equipment expenses; (3) loan and other real estate related expenses; (4) professional services; (5) data processing and network; (6) regulatory assessments and insurance; (7) amortization of core deposit intangibles; (8) advertising; (9) marketing; (10) telephone expense; and (11) other.

The following table presents a summary of noninterest expenses by category, including the percentage change in each category, for the periods indicated:

	Three Months Ended September 30,							Nine Months Ended September 30,
	2018		2017		Change from the Prior Period			2018		2017		Change from the Prior Period
Noninterest expense:
Salaries and employee benefits		6,623		5,271		25.6	%		19,524		17,774		9.8	%
Occupancy and equipment expenses		1,279		1,239		3.2	%		3,736		3,742		-0.2	%
Loan and other real estate related expenses		94		20		370.0	%		171		244		-29.9	%
Professional services		624		410		52.2	%		1,249		1,159		7.8	%
Data processing and network		302		317		-4.7	%		936		899		4.1	%
Regulatory assessments and insurance		266		221		20.4	%		787		689		14.2	%
Amortization of intangibles		176		176		0.0	%		527		527		0.0	%
Advertising		83		147		-43.5	%		300		431		-30.4	%
Marketing		115		118		-2.5	%		354		399		-11.3	%
Telephone expense		120		109		10.1	%		332		325		2.2	%
Other operating expenses		599		511		17.2	%		1,872		1,754		6.7	%
Total noninterest expense	$	10,281	$	8,539		20.4	%	$	29,788	$	27,943		6.6	%

Three months ended September 30, 2018 compared to three months ended September 30, 2017

For the three months ended September 30, 2018, noninterest expenses totaled $10.3 million, a $1.7 million, or 20.4%, increase from $8.5 million for the prior period. This increase was primarily due to an increase in salaries and employee benefits of $1.4 million and an increase in professional services expense of $214 thousand.

Salaries and employee benefits totaled $6.6 million for the three months ended September 30, 2018, which included $181 thousand of stock-based compensation expense. By comparison, salaries and employee benefits totaled $5.3 million for the three months ended September 30, 2017, which included $201 thousand of stock-based compensation expense. The increase in salaries and employee benefits is primarily due to the seasonality of annual bonuses.

Professional services totaled $624 thousand for the three months ended September 30, 2018 compared to $410 thousand for the three months ended September 30, 2017. This increase is primarily the result of the merger related expenses for the Comanche acquisition.  

Nine months ended September 30, 2018 compared to nine months ended September 30, 2017

For the nine months ended September 30, 2018, noninterest expenses totaled $29.8 million, a $1.8 million, or 6.6%, increase from $27.9 million for the prior period. This increase was primarily due to an increase in salaries and employee benefits of $1.8 million.

Salaries and employee benefits totaled $19.5 million for the nine months ended September 30, 2018, which included $506 thousand of stock-based compensation expense and a one-time executive bonus expense of $475 thousand. By comparison, salaries and employee benefits totaled $17.8 million for the nine months ended September 30, 2017, which included $1.4 million of stock-based compensation expense. During the nine months ended September 30, 2017, we incurred a one-time expense of $757 thousand in connection with the accelerated vesting of all stock options held by our board of directors and the board of directors of the Bank approved by our board of directors in February 2017. The increase in salaries and employee benefits is primarily due to the seasonality of annual bonuses and the payment of the one-time executive bonus during the nine months ended September 30, 2018.

Income Tax Expense

The provision for income taxes includes both federal and state taxes. Fluctuations in effective tax rates reflect the differences in the inclusion or deductibility of certain income and expenses for income tax purposes. Our future effective income tax rate will

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fluctuate based on the mix of taxable and tax-free investments we make, periodic increases in surrender value of bank-owned life insurance policies for certain former executive officers and our overall taxable income.

Three months ended September 30, 2018 compared to three months ended September 30, 2017

Income tax expense was $719 thousand for the three months ended September 30, 2018, a decrease of $384 thousand compared to income tax expense of $1.1 million for the three months ended September 30, 2017. Our effective tax rates for the three months ended September 30, 2018 and 2017 were 20.6% and 35.5%, respectively, primarily due to the impact of changes in the United States tax law during the year ended December 31, 2017. On December 22, 2017, the United States enacted the Tax Cuts and Jobs Act (“Tax Reform”) resulting in significant modifications to existing law. Our financial statements for the three months ended September 30, 2018 reflect certain effects of the Tax Reform, which include a reduction in the corporate tax rate from 34.0% to 21.0%.

Nine months ended September 30, 2018 compared to nine months ended September 30, 2017

Income tax expense was $1.9 million for the nine months ended September 30, 2018 and $2.3 million for the nine months ended September 30, 2017. Our effective tax rates for the nine months ended September 30, 2018 and 2017 were 20.3% and 34.9%, respectively, primarily due to the impact of the Tax Reform, which included a reduction in the corporate tax rate from 34.0% to 21.0%.

We recorded an uncertain tax position at December 31, 2017 arising from a deduction taken on the 2016 federal return related to a request for change in accounting method.  The total amount of the recorded uncertain tax position at December 31, 2017 was $903 thousand and is included in other liabilities. During the second quarter of 2018, the Company filed an amended return and the uncertain tax position was settled against the balance left on account with the IRS.  The Company’s policy is to classify interest and penalties associated with income taxes within other expenses. The Company did not record interest and penalties associated with income taxes for the three or nine months ended September 30, 2018 or 2017.

Financial Condition

Our total assets increased $71.9 million, or 7.0%, from $1.03 billion as of December 31, 2017 to $1.10 billion as of September 30, 2018. Our asset growth was mainly due to the capital raised during our initial public offering during the second quarter of 2018.

Investment Securities

We use our investment securities portfolio to provide a source of liquidity, provide an appropriate return on funds invested, manage interest rate risk, and meet collateral requirements and meet regulatory capital requirements. The average balance of the securities portfolio including FHLB and The Independent Bankers Bank, or TIB, bank stock for the three months ended September 30, 2018 and 2017 was $39.1 million and $43.8 million, respectively, with a pre-tax yield of 2.38% and 2.22%, respectively. The average balance of the securities portfolio including FHLB and The Independent Bankers Bank, or TIB, stock for the nine months ended September 30, 2018 and 2017 was $40.1 million and $29.2 million, respectively, with a pre-tax yield of 2.33% and 1.92%, respectively. We held 50 securities classified as available for sale with an amortized cost of $34.9 million as of September 30, 2018.    

Management evaluates securities for other-than-temporary impairment, or OTTI, at least on a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. No securities were determined to be OTTI as of September 30, 2018 or December 31, 2017.

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The following tables show contractual maturities and the weighted average yields on our investment securities as of the dates presented. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Weighted average yields are not presented on a taxable equivalent basis:

	Maturity as of September 30, 2018
	One Year or Less					One to Five Years					Five to Ten Years					After Ten Years
(Dollars in thousands)	Amortized Cost		Weighted Average Yield			Amortized Cost		Weighted Average Yield			Amortized Cost		Weighted Average Yield			Amortized Cost		Weighted Average Yield
Available for sale:
U.S. Government    agencies	$	—		0.00	%	$	—		0.00	%	$	1,537		2.18	%	$	477		2.92	%
Residential mortgage-    backed securities		—		0.00	%		2		2.75	%		2,019		2.36	%		25,176		2.65	%
Corporate bonds and other    debt securities		—		0.00	%		4,117		2.49	%		1,561		2.79	%		—		0.00	%
Total available for    sale	$	—		0.00	%	$	4,119		2.49	%	$	5,117		2.44	%	$	25,653		2.66	%

	Maturity as of December 31, 2017
	One Year or Less					One to Five Years					Five to Ten Years					After Ten Years
(Dollars in thousands)	Amortized Cost		Weighted Average Yield			Amortized Cost		Weighted Average Yield			Amortized Cost		Weighted Average Yield			Amortized Cost		Weighted Average Yield
Available for sale:
U.S. Government    agencies	$	—		0.00	%	$	—		0.00	%	$	1,535		2.18	%	$	475		2.99	%
Residential mortgage-    backed securities		—		0.00	%		2		2.75	%		—		0.00	%		30,154		2.01	%
Corporate bonds and    other debt securities		—		0.00	%		4,142		2.45	%		1,569		2.72	%		—		0.00	%
Total available for sale	$	—		0.00	%	$	4,144		2.45	%	$	3,104		2.45	%	$	30,629		2.03	%

As a member institution of the FHLB and TIB, the Bank is required to own capital stock in the FHLB and TIB. As of September 30, 2018 the Bank held approximately $4.9 million in FHLB and TIB bank stock and $4.8 million as of December 31, 2017. No market exists for this stock, and the Bank’s investment can be liquidated only through repurchase by the FHLB or TIB. Such repurchases have historically been at par value. We monitor our investment in FHLB and TIB stock for impairment through review of recent financial results, dividend payment history and information from credit agencies. As of September 30, 2018 and December 31, 2017, management did not identify any indicators of impairment of FHLB and TIB stock.

Except for securities issued by U.S. government agencies, we did not have any concentrations where the total outstanding balances issued by a single issuer exceed 10% of our stockholders’ equity as of September 30, 2018 and December 31, 2017.

Our securities portfolio had a weighted average life of 5.45 years and an effective duration of 4.98 years as of September 30, 2018 and a weighted average life of 5.00 years and an effective duration of 5.03 years as of December 31, 2017.

Loans Held for Sale

Loans held for sale consist of the guaranteed portion of SBA loans that we intend to sell after origination. Our loans held for sale were $5.5 million as of September 30, 2018 and $3.8 million as of December 31, 2017.

Loan Concentrations

Our primary source of income is interest on loans to individuals, professionals, small and medium-sized businesses and commercial companies located in the Houston and Dallas/Fort Worth metropolitan areas. Our loan portfolio consists primarily of commercial and industrial loans, 1-4 single family residential real estate loans and loans secured by commercial real estate properties located in our primary market areas. Our loan portfolio represents the highest yielding component of our earning asset base.

Our total loans held for investment of $954.1 million as of September 30, 2018 represented an increase of $85.0 million, or 9.8%, compared to $869.1 million as of December 31, 2017. Our loans as a percentage of assets were 86.6% and 84.4% as of September 30, 2018 and December 31, 2017, respectively.

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The current concentrations in our loan portfolio may not be indicative of concentrations in our loan portfolio in the future. We plan to maintain a relatively diversified loan portfolio to help reduce the risk inherent in concentration in certain types of collateral. The following table summarizes the allocation of loans by type as of the dates presented.

	September 30, 2018					December 31, 2017
(Dollars in thousands)	Amount		% of Total			Amount		% of Total
Commercial and industrial loans (1)	$	159,776		16.8	%	$	135,040		15.5	%
Real estate:
1-4 single family residential loans		244,633		25.6	%		232,510		26.8	%
Construction, land and development loans		155,778		16.3	%		139,470		16.0	%
Commercial real estate loans (including multifamily)		324,212		34.0	%		285,731		32.9	%
Consumer loans and leases		18,174		1.9	%		22,736		2.6	%
Municipal and other loans		51,501		5.4	%		53,632		6.2	%
Total loans held in portfolio	$	954,074		100.0	%	$	869,119		100.0	%

(1) Balance includes $75.9 million and $67.1 million of the unguaranteed portion of SBA loans as of September 30, 2018 and December 31, 2017, respectively.

Commercial and Industrial Loans (including SBA loans)

Commercial and industrial loans, including SBA loans, are underwritten after evaluating and understanding the borrower’s ability to repay the loan through operating profitably and effectively growing its business. Our management examines current and projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans are primarily made based on the credit quality and cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee to add strength to the credit and reduce the risk on a transaction to an acceptable level; however, some short-term loans may be made on an unsecured basis to the most credit worthy borrowers.

In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its customers. Due to the nature of accounts receivable and inventory secured loans, we closely monitor credit availability and collateral through the use of various tools, including but not limited to borrowing-base formulas, periodic accounts receivable agings, periodic inventory audits, and/or collateral inspections.

Commercial and industrial loans, including SBA loans, totaled $159.8 million as of September 30, 2018 and represented an increase of $24.7 million, or 18.3%, from $135.0 million as of December 31, 2017. We believe we are well-positioned for continued loan growth in our commercial and industrial loan portfolio based on our strategic presence in the Houston and Dallas/Fort Worth metropolitan areas, which are expected to continue to benefit from favorable economic conditions.

The primary focus of our SBA lending program is financing well-known national franchises for which the United States generally will guarantee between 75% and 85% of the loan. We are a SBA preferred lender, and originate SBA loans to national franchises in Texas and nationwide. We routinely sell the guaranteed portion of SBA loans to third parties for a premium and retain the servicing rights, for which we earn a 1% fee, and maintain the nonguaranteed portion in our loan portfolio.

SBA loans held in our loan portfolio totaled $75.9 million and $67.1 million at September 30, 2018 and December 31, 2017, respectively. We intend to continue to expand our SBA lending program in the future.

Real estate loans

1-4 single family residential real estate loans (including loans to foreign nationals)

1-4 single family residential real estate loans, including foreign national loans, are subject to underwriting standards and processes similar to commercial and industrial loans. We provide mortgages for the financing of 1-4 single family residential homes for primary occupancy, vacation or rental purposes. The borrowers on these loans generally qualify for traditional market financing.We also specialize in 1-4 single family residential real estate loans to foreign national customers, in which the borrower does not qualify for traditional market financing.

We define our foreign national loans as loans to borrowers who derive more than 50% of their personal income from outside the U.S. We provide mortgages for these foreign nationals in Texas for primary occupancy or secondary homes while travelling to the U.S. Because more than 50% of the borrower’s income is derived from outside of the U.S., they do not qualify for traditional market

44

financing. We have developed an enhanced due diligence process for foreign national loans that includes larger down payments than a traditional mortgage, as well as minimum reserves equal to an amount of mortgage payments over a specified period held in the Bank and monthly escrows for taxes and insurance.

1-4 single family residential real estate loans (including loans to foreign nationals) totaled $244.6 million as of September 30, 2018 and represented an increase of $12.1 million, or 5.2%, from $232.5 million as of December 31, 2017. We believe we are well-positioned for continued loan growth in our 1-4 single family residential real estate loan portfolio based on our strategic presence in the Houston and Dallas/Fort Worth metropolitan areas, which are expected to continue to benefit from favorable economic conditions.

Construction, land and development loans

With respect to loans to developers and builders, we generally require the borrower to have a proven record of success and expertise in the building industry. Construction loans are underwritten utilizing feasibility studies, independent appraisal reviews, sensitivity analysis of absorption and lease rates and financial analysis of the developers and property owners. Construction loans are generally based upon estimates of costs and value associated with the complete project. These estimates may be inaccurate. Construction loans often involve the disbursement of substantial funds with repayment primarily dependent on the success of the ultimate project.

Sources of repayment for these types of loans may be pre-committed permanent loans from approved long-term lenders, sales of developed property or an interim loan commitment from us until permanent financing is obtained. These loans are closely monitored by on-site inspections and are considered to have higher risks than other real estate loans due to their ultimate repayment being sensitive to interest rate changes, governmental regulation of real property, general economic conditions and the availability of long-term financing. Due to the nature of the real estate industry, we evaluate the borrower’s ability to service the interest of the debt from other sources other than the sale of the constructed property.

Construction loans totaled $155.8 million as of September 30, 2018 and represented an increase of $16.3 million, or 11.7%, from $139.5 million as of December 31, 2017. We believe we are well-positioned for continued loan growth in our construction, land and development loan portfolio based on our strategic presence in the Houston and Dallas/Fort Worth metropolitan areas, which are expected to continue to benefit from favorable economic conditions.

Commercial real estate loans

Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans. Commercial real estate lending typically involves higher loan principal amounts and the repayment of these loans is generally largely dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan.

Commercial real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. Management monitors and evaluates commercial real estate loans based on collateral and risk grade criteria. As a general rule, we avoid financing special use projects unless strong secondary support is present to help mitigate risk.

Commercial real estate loans consist of owner and nonowner-occupied commercial real estate loans, multifamily loans and farmland. Total commercial real estate loans of $324.2 million as of September 30, 2018 represented an increase of $38.5 million, or 13.5%, from $285.7 million as of December 31, 2017. We believe we are well-positioned for continued loan growth in our commercial real estate loan portfolio based on our strategic presence in the Houston and Dallas/Fort Worth metropolitan areas, which are expected to continue to benefit from favorable economic conditions.

Consumer loans and leases

Our non-real estate consumer loans are based on the borrower’s proven earning capacity over the term of the loan. We monitor payment performance periodically for consumer loans to identify any deterioration in the borrower’s financial strength. To monitor and manage consumer loan risk, management develops and adjusts policies and procedures as needed. This activity, coupled with a relatively small volume of consumer loans, minimizes risk.

All of our leases are related to the financing of vehicle leases to individuals. These loans are originated by a well-known third party leasing company and subsequently purchased by us after our final credit review. We limit our exposure to individuals living in Texas, within our defined local markets.

Consumer loans and leases totaled $18.2 million as of September 30, 2018 and represented a decrease of $4.6 million, or 20.1%, from $22.7 million as of December 31, 2017. We have not actively grown our consumer portfolio because we believe current pricing on these loans does not adequately cover the inherent risk.

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Municipal and other loans

Municipal and other loans consist primarily of loans made to municipalities and emergency service, hospital and school districts as well as agricultural loans.

We make loans to municipalities and emergency service, hospital and school districts primarily throughout Texas. The majority of these loans have tax or revenue pledges and in some cases are additionally supported by collateral. Municipal loans made without a direct pledge of taxes or revenues are usually made based on some type of collateral that represents an essential service. Lending money directly to these municipalities allows us to earn a higher yield for similar durations than we could if we purchased municipal securities. Total loans to municipalities and emergency service, hospital and school districts and others were $51.5 million as of September 30, 2018 and represented a decrease of $2.1 million, or 4.0%, from $53.6 million as of December 31, 2017. We have not actively grown our municipal loan portfolio as the impact of the recent Tax Reform has resulted in unfavorable pricing on these loans.

Asset Quality

The following table sets forth the composition of our nonperforming assets, including nonaccrual loans, accruing loans 90 days or more days past due, other real estate owned and repossessed assets and restructured loans as of the dates indicated:

	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Nonperforming assets
Nonaccrual loans:
Commercial and industrial loans	$	2,421	$	1,927
Real estate:
1-4 single family residential loans		825		1,135
Construction, land and development loans		—		—
Commercial real estate loans (including multifamily)		—		447
Consumer loans and leases		72		53
Municipal and other loans		—		—
Total nonaccrual loans		3,318		3,562
Accruing loans 90 days or more past due		426		33
Total nonperforming loans		3,744		3,595
Other real estate owned and repossessed assets		289		21
Total nonperforming assets	$	4,033	$	3,616
Restructured loans (1)	$	218	$	270

(1) Restructured loans represent the balance at the end of the respective period for those performing loans modified in a troubled debt restructuring that are not already presented as a nonperforming loan.

Nonperforming loans totaled $3.7 million at September 30, 2018, an increase of $149 thousand, or 4.1%, from $3.6 million at December 31, 2017. Nonperforming assets totaled $4.0 million at September 30, 2018, an increase of $417 thousand, or 11.5%, from $3.6 million at December 31, 2017.

We classify loans as past due when the payment of principal or interest is greater than 30 days delinquent based on the contractual next payment due date. Our policies related to when loans are placed on nonaccrual status conform to guidelines prescribed by bank regulatory authorities. Loans are placed on nonaccrual status when it is probable that principal or interest is not fully collectible, or when principal or interest becomes 90 days past due, whichever occurs first. Loans are removed from nonaccrual status when they become current as to both principal and interest and concern no longer exists as to the collectability of principal and interest.

Loans are identified for restructuring based on their delinquency status, risk rating downgrade, or at the request of the borrower. Borrowers that are 90 days delinquent and/or have a history of being delinquent, or experience a risk rating downgrade, are contacted to discuss options to bring the loan current, cure credit risk deficiencies, or other potential restructuring options that will reduce the inherent risk and improve collectability of the loan. In some instances, a borrower will initiate a request for loan restructure. We require borrowers to provide current financial information to establish the need for financial assistance and satisfy applicable prerequisite conditions required by us. We may also require the borrower to enter into a forbearance agreement.

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Modification of loan terms may include the following: reduction of the stated interest rate; extension of maturity date or other payment dates; reduction of the face amount or maturity amount of the loan; reduction in accrued interest; forgiveness of past-due interest; or a combination of the foregoing.

We engage an external consulting firm to complete an independent loan review and validate our credit risk program on a periodic basis. Results of these reviews are presented to management. The loan review process complements and reinforces the risk ratings and credit quality assessment decisions made by lenders and credit personnel, as well as our policies and procedures.

The following table sets forth our asset and credit quality ratios for the periods presented:

	September 30, 2018			December 31, 2017
Asset and Credit Quality Ratios
Nonperforming loans to loans held for investment (1)		0.39	%		0.41	%
Nonperforming assets to loans plus OREO		0.42	%		0.42	%
Nonperforming assets to total assets (2)		0.37	%		0.35	%
Net charge-offs to average loans (annualized)(3)		0.14	%		0.14	%
Allowance for loan losses to nonperforming loans		164.42	%		157.22	%
Allowance for loan losses to loans held for investment		0.65	%		0.65	%

(1) Nonperforming loans include loans in nonaccrual status.

(2) Nonperforming assets include loans in nonaccrual status and other real estate owned.

(3) December 31, 2017 ratio uses year to date net charge-offs.

Analysis of the Allowance for Loan and Lease Losses

Allowance for loan and lease losses reflects management’s estimate of probable credit losses inherent in the loan portfolio. The computation of the allowance for loan and lease losses includes elements of judgment and high levels of subjectivity.

The following tables summarize the allocation of allowance for loan and lease losses related to our loans as of the dates and for the periods presented. This allocation is calculated on an approximate basis and is not necessarily indicative of future losses or allocations. The entire amount of the allowance is available to absorb losses occurring in any category of loans:

	Allowance Rollforward
Three Months Ended September 30, 2018	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	4,886	$	(275	)	$	4	$	76		$	4,691
Real estate:
1-4 single family residential loans		318		—			—		(216	)		102
Construction, land and development loans		195		—			—		256			451
Commercial real estate loans (including multifamily)		233		—			—		495			728
Consumer loans and leases		346		(74	)		—		(90	)		182
Municipal and other loans		37		—			—		(35	)		2
Ending allowance balance	$	6,015	$	(349	)	$	4	$	486		$	6,156

	Allowance Rollforward
Three Months Ended September 30, 2017	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	2,582	$	(15	)	$	—	$	20		$	2,587
Real estate:
1-4 single family residential loans		732		—			—		201			933
Construction, land and development loans		412		—			—		103			515
Commercial real estate loans (including    multifamily)		800		—			—		255			1,055
Consumer loans and leases		204		(16	)		—		(15	)		173
Municipal and other loans		161		—			—		40			201
Ending allowance balance	$	4,891	$	(31	)	$	—	$	604		$	5,464

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	Allowance Rollforward
Nine Months Ended September 30, 2018	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	3,046	$	(920	)	$	73	$	2,492		$	4,691
Real estate:
1-4 single family residential loans		902		(5	)		—		(795	)		102
Construction, land and development loans		441		—			—		10			451
Commercial real estate loans (including multifamily)		898		—			—		(170	)		728
Consumer loans and leases		198		(104	)		—		88			182
Municipal and other loans		167		—			—		(165	)		2
Ending allowance balance	$	5,652	$	(1,029	)	$	73	$	1,460		$	6,156

	Allowance Rollforward
Nine Months Ended September 30, 2017	Beginning Balance		Charge-offs			Recoveries		Provision		Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	2,347	$	(555	)	$	2	$	793	$	2,587
Real estate:
1-4 single family residential loans		647		—			—		286		933
Construction, land and development loans		364		—			—		151		515
Commercial real estate loans (including multifamily)		667		(15	)		—		403		1,055
Consumer loans and leases		186		(129	)		—		116		173
Municipal and other loans		146		—			—		55		201
Ending allowance balance	$	4,357	$	(699	)	$	2	$	1,804	$	5,464

In determining the allowance for loan and lease losses, we estimate losses on specific loans, or groups of loans, where the probable loss can be identified and reasonably determined. The balance of the allowance for loan and lease losses is based on internally assigned risk classifications of loans, historical loan loss rates, changes in the nature of the loan portfolio, overall portfolio quality, industry concentrations, delinquency trends, current economic factors and the estimated impact of current economic conditions on certain historical loan loss rates.

During 2017, we refined our allowance for loan loss methodology based upon management’s judgment and applicable regulatory guidance. The calculation of reserves on loans collectively evaluated for impairment was altered to reflect five years of historical loss experience which more appropriately matches the weighted average life of loans in the portfolio. Additionally, the calculated historical loss experience is now allocated across the portfolio’s risk rates using a probability of default curve constructed from the Bank’s historical default data. We also updated the qualitative component of the reserve on loans collectively evaluated for impairment to allow for a greater sensitivity to current trends.

Prior to the second quarter of 2018, we were utilizing a peer bank allowance coverage ratio in the qualitative reserve calculation, as we did not have enough historical defaults to rely on our own loss factors. As of September 30, 2018, we had a sufficient amount of defaults over the five year lookback period to transition over to relying more on our own historical loss data versus peer data. While this did not result in a significant change to the allowance for loan and lease losses as a whole, it continues to impact the provision for certain loan categories that we had experienced more historical defaults.

The allowance for loan and lease losses increased to $6.2 million at September 30, 2018 as compared to $5.7 million at December 31, 2017. The allowance for loan and lease losses as a percentage of nonperforming loans and allowance for loan and lease losses as a percentage of loans held for investment was 164.42% and 0.65%, respectively, as of September 30, 2018, compared to 157.22% and 0.65%, respectively, as of December 31, 2017.

Net loan charge-offs for the three months ended September 30, 2018 totaled $345 thousand, an increase from $31 thousand of net loan charge-offs for the same period of 2017. Net loan charge-offs for the nine months ended September 30, 2018 totaled $956 thousand, a decrease from $697 thousand of net loan charge-offs for the same period of 2017.

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The following table provides the allocation of the allowance for loan and lease losses as of the dates presented:

	September 30, 2018					December 31, 2017
	Amount		% Loans in each category			Amount		% Loans in each category
	(Dollars in thousands)
Commercial and industrial loans	$	4,691		16.8	%	$	3,046		15.5	%
Real estate:
1-4 single family residential loans		102		25.6	%		902		26.8	%
Construction, land and development loans		451		16.3	%		441		16.0	%
Commercial real estate loans (including multifamily)		728		34.0	%		898		32.9	%
Consumer loans and leases		182		1.9	%		198		2.6	%
Municipal and other loans		2		5.4	%		167		6.2	%
Total	$	6,156		100.0	%	$	5,652		100.0	%

Deposits

We expect deposits to be our primary funding source in the future as we optimize our deposit mix by continuing to shift our deposit composition from higher cost time deposits to lower cost demand deposits. Non-time deposits include demand deposits, NOW accounts, and savings and money market accounts.

The following table shows the deposit mix as of the dates presented:

	September 30, 2018					December 31, 2017
	Amount		% of Total			Amount		% of Total
	(Dollars in thousands)
Noninterest-bearing demand deposits	$	207,727		23.8	%	$	176,726		21.2	%
Interest-bearing NOW accounts		7,865		0.9	%		7,318		0.9	%
Savings and money market accounts		214,380		24.6	%		243,173		29.1	%
Time deposits		442,638		50.7	%		408,151		48.8	%
Total deposits	$	872,610		100.0	%	$	835,368		100.0	%

Total deposits at September 30, 2018 were $872.6 million, an increase of $37.2 million, or 4.5%, from total deposits at December 31, 2017 of $835.4 million.

The average cost of deposits for the three months ended September 30, 2018 was 1.02%. This represents an increase of 23 basis points compared to the average cost of deposits of 0.79% for the three months ended September 30, 2017. The increase in cost of deposits was primarily attributable to the increase in interest rates by the Federal Open Market Committee during 2017 and 2018. For the three months ended September 30, 2018, the average rate paid on time deposits was 1.67% compared to 1.26% for the three months ended September 30, 2017.

The average cost of deposits for the nine months ended September 30, 2018 was 0.93%. This represents an increase of 14 basis points compared to the average cost of deposits of 0.79% for the nine months ended September 30, 2017. The increase in cost of deposits was primarily attributable to the increase in interest rates by the Federal Open Market Committee during 2017 and 2018. For the nine months ended September 30, 2018, the average rate paid on time deposits was 1.50% compared to 1.21% for the nine months ended September 30, 2017.

The following table shows the remaining maturity of time deposits of $100,000 and greater as of the date indicated:

	September 30, 2018
	(Dollars in thousands)
Time deposits $100,000 or greater with remaining maturity of:
Three months or less	$	56,315
After three months through six months		64,840
After six months through twelve months		93,848
After twelve months		131,841
Total	$	346,844

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Borrowings

In addition to deposits, we utilize advances from the FHLB and other borrowings as a supplementary funding source to finance our operations.

FHLB borrowings: The FHLB allows us to borrow, both short and long-term, on a blanket floating lien status collateralized by certain securities and loans. As of September 30, 2018 and December 31, 2017, total remaining borrowing capacity of $293.3 million and $274.0 million, respectively, was available under this arrangement.

Line of credit: We entered into a line of credit with a third party lender in May 2017 that allows us to borrow up to $20 million. The interest rate on this line of credit is based upon 90-day LIBOR plus 4.0%, and unpaid principal and interest is due at the stated maturity of May 12, 2022. This line of credit is secured by a pledge of all of the common stock of the Bank. This line of credit may be prepaid at any time without penalty, so long as such prepayment includes the payment of all interest accrued through the date of the repayments, and, in the case of prepayment of the entire loan, the amount of attorneys’ fees and disbursements of the lender. On May 8, 2018, we used $7.8 million of net proceeds from our initial public offering to repay in full this line of credit, plus accrued and unpaid interest. At September 30, 2018, total borrowing capacity of $20.0 million was available under this line of credit.

Total borrowings consisted of the following as of the dates presented:

	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Short-term FHLB borrowings	$	10,000	$	15,000
Long-term FHLB borrowings		64,961		68,623
Third party lender line of credit		—		7,788
Total borrowings	$	74,961	$	91,411

At September 30, 2018, total borrowings were $75.0 million, a decrease of $16.5 million, or 18.0%, from $91.4 million at December 31, 2017.

Short-term borrowings consist of debt with maturities of one year or less. Our short-term borrowings consist of FHLB borrowings and a third party line of credit. The following table is a summary of short-term borrowings as of and for the periods presented:

	As of/For the Three Months Ended September 30,						As of/For the Nine Months Ended September 30,
		2018			2017			2018			2017
	(Dollars in thousands)
Short-term borrowings:
Maximum outstanding at any month-end during the period	$	15,000		$	12,788		$	20,000		$	40,000
Balance outstanding at end of period		10,000			12,788			10,000			12,788
Average outstanding during the period		11,957			12,723			15,128			18,810
Average interest rate during the period		1.72	%		3.74	%		1.73	%		2.28	%
Average interest rate at the end of the period		1.71	%		4.31	%		1.71	%		4.31	%

Stockholders’ Equity

The following table summarizes the changes in our stockholders’ equity for the periods indicated:

	Three Months Ended September 30,						Nine Months Ended September 30,
		2018			2017			2018			2017
	(Dollars in thousands)						(Dollars in thousands)
Balance at beginning of period	$	147,986		$	96,602		$	99,139		$	92,896
Net income		2,771			2,002			7,465			4,230
Shares issued in offering, net		(161	)		—			42,058			—
Exercise of stock options and warrants		177			25			2,362			471
Stock-based compensation		181			201			506			1,361
Other comprehensive income (loss)		(61	)		(25	)		(637	)		(153	)
Balance at end of period	$	150,893		$	98,805		$	150,893		$	98,805

Net income totaled $2.8 million for the three months ended September 30, 2018, an increase of $769 thousand, compared to $2.0 million for the three months ended September 30, 2017. Our results of operations for the three months ended September 30, 2018 produced an annualized return on average assets of 1.01%% compared to 0.78% for the three months ended September 30, 2017. Our

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results of operations for the three months ended September 30, 2018 produced an annualized return on average stockholders’ equity of 7.34% compared to 7.78% for the three months ended September 30, 2017.

Net income totaled $7.5 million for the nine months ended September 30, 2018, an increase of $3.2 million, compared to $4.2 million for the nine months ended September 30, 2017. Our results of operations for the nine months ended September 30, 2018 produced an annualized return on average assets of 0.94% compared to an annualized return on average assets of 0.56% for the nine months ended September 30, 2017. We had an annualized return on average stockholders’ equity of 8.08% for the nine months ended September 30, 2018, compared to an annualized return on average stockholders’ equity of 5.64% for the nine months ended September 30, 2017.

Stockholders’ equity was $150.9 million as of September 30, 2018, an increase of $51.8 million from $99.1 million as of December 31, 2017. The increase was primarily driven by proceeds raised during our initial public offering of $42.1 million, net income of $7.5 million and the exercise of stock options and warrants of $2.4 million during the period.

Off-Balance Sheet Arrangements

In the normal course of business, we enter into various transactions, which, in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”), are not included on our consolidated balance sheets. We enter into these transactions to meet the financing needs of our customers. These transactions include commitments to extend credit and commercial and standby letters of credit, which involve, to varying degrees, elements of credit risk and interest rate risk in excess of the amounts recognized on our consolidated balance sheets.

We enter into contractual loan commitments to extend credit, normally with fixed expiration dates or termination clauses, at specified rates and for specific purposes. Since a portion of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent our future cash requirements. Substantially all of our commitments to extend credit are contingent upon customers maintaining specific credit standards until the time of loan funding. We seek to minimize our exposure to loss under these commitments by subjecting them to prior credit approval and ongoing monitoring procedures. We assess the credit risk associated with certain commitments to extend credit and establish a liability for probable credit losses. As of September 30, 2018 and December 31, 2017, our reserve for unfunded commitments totaled $40 thousand.

Commercial and standby letters of credit are written conditional commitments issued by us to guarantee the performance of a customer to a third party. In the event the customer does not perform in accordance with the terms of the agreement with the third party, we would be required to fund the commitment. The maximum potential amount of future payments we could be required to make is represented by the contractual amount of the commitment. If the commitment is funded, we would be entitled to seek recovery from the customer. Our policies generally require that standby letter of credit arrangements contain security and debt covenants similar to those contained in loan agreements.

The following table summarizes our commitments as of the dates presented:

	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Unfunded loan commitments	$	142,657	$	134,536
Commercial and standby letters of credit		85		91
Total	$	142,742	$	134,627

Management believes that we have adequate liquidity to meet all known contractual obligations and unfunded commitments, including loan commitments over the next twelve months. Additionally, management believes that our off-balance sheet arrangements have not had or are not reasonably likely to have a current or future material effect on our financial condition, revenues, expenses, results of operations, liquidity, capital expenditures or capital resources.

Capital Resources

We are required to comply with certain “risk-based” capital adequacy guidelines issued by the Board of Governors of the Federal Reserve System (the “FRB”) and the Federal Deposit Insurance Corporation (the “FDIC”). The risk-based capital guidelines assign varying risk weights to the individual assets held by a bank. The guidelines also assign weights to the “credit-equivalent” amounts of certain off-balance sheet items, such as letters of credit and interest rate and currency swap contracts.

Under the Basel III rules adopted by the federal bank regulatory agencies in July 2013 and effective beginning January 1, 2015, we are required to maintain a leverage ratio of 4.0% (5.0% to be considered “well capitalized”), common equity tier 1 capital to risk-

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weighted assets ratio of 4.5% (6.5% to be considered “well capitalized”), a tier 1 capital to risk-weighted assets ratio of 6.0% (8.0% to be considered “well capitalized”), and a total capital to risk-weighted assets ratio of 8.0% (10.0% to be considered “well capitalized”). In addition, the risk-weighted capital ratios include a capital conservation buffer of 2.5%, which is in addition to the minimum risk-based capital standards. Institutions that do not maintain this required capital conservation buffer will become subject to progressively more stringent limitations on the percentage of earnings that can be paid out in dividends or used for stock repurchases and on the payment of discretionary bonuses to senior executive management. The capital conservation buffer is being phased in over four years beginning in 2016. We have included the 1.25% and 1.875% increases for 2017 and 2018, respectively, in our minimum capital adequacy ratios in the table below. The capital conservation buffer effectively raises the minimum required common equity tier 1 capital ratio to 7.0%, the tier 1 capital ratio to 8.5%, and the total capital ratio to 10.5% on a fully phased-in basis on January 1, 2019.

The risk-based capital ratios measure the adequacy of a bank’s capital against the riskiness of its assets and off-balance sheet activities. Failure to maintain adequate capital is a basis for “prompt corrective action” or other regulatory enforcement action. In assessing a bank’s capital adequacy, regulators also consider other factors such as interest rate risk exposure; liquidity, funding and market risks; quality and level of earnings; concentrations of credit, quality of loans and investments; risks of any nontraditional activities; effectiveness of bank policies; and management’s overall ability to monitor and control risks.

The following table sets forth the regulatory capital ratios, excluding the impact of the capital conservation buffer, as of the dates indicated:

	Minimum Capital	Minimum Capital Requirement with Capital	Minimum To Be Well	September 30, 2018			December 31, 2017
	Requirement	Buffer	Capitalized	Actual			Actual
Capital ratios (Company):
Tier 1 leverage ratio	4.0%	4.000%	N/A		13.03	%		8.71	%
Common equity tier 1 capital ratio	4.5%	6.375%	N/A		14.66	%		10.07	%
Tier 1 risk-based capital ratio	6.0%	7.875%	N/A		14.66	%		10.07	%
Total risk-based capital ratio	8.0%	9.875%	N/A		15.31	%		10.72	%
Capital ratios (Bank):
Tier 1 leverage ratio	4.0%	4.000%	5.0%		9.36	%		9.29	%
Common equity tier 1 capital ratio	4.5%	6.375%	6.5%		10.53	%		10.74	%
Tier 1 risk-based capital ratio	6.0%	7.875%	8.0%		10.53	%		10.74	%
Total risk-based capital ratio	8.0%	9.875%	10.0%		11.18	%		11.39	%

At September 30, 2018, both we and the Bank met all the capital adequacy requirements to which we and the Bank were subject. At September 30, 2018, the Bank was “well capitalized” under the regulatory framework for prompt corrective action. Management believes that no conditions or events have occurred since September 30, 2018 that would materially adversely change such capital classifications. From time to time, we may need to raise additional capital to support our and the Bank’s further growth and to maintain the Bank’s “well capitalized” status.

As of September 30, 2018, we had a tier 1 leverage ratio of 13.03%. As of September 30, 2018, the Bank had a tier 1 leverage ratio of 9.36%, which provided $46.8 million of excess capital relative to the minimum requirements to be considered “well capitalized.”

Liquidity

Liquidity involves our ability to raise funds to support asset growth and acquisitions or reduce assets to meet deposit withdrawals and other payment obligations, to maintain reserve requirements and otherwise to operate on an ongoing basis and manage unexpected events. At September 30, 2018 and December 31, 2017, our liquidity needs were primarily met by core deposits, security and loan maturities and amortizing investment and loan portfolios. Although access to brokered deposits, purchased funds from correspondent banks and overnight advances from the FHLB are available and have been utilized on occasion to take advantage of investment opportunities, we do not generally rely on these external funding sources. The Bank maintained four Federal Funds lines of credit with commercial banks which provide for extensions of credit with an availability to borrow up to an aggregate $35.0 million as of September 30, 2018 and December 31, 2017. There were no advances under these lines of credit outstanding as of September 30, 2018 or December 31, 2017.

Our primary source of funds is deposits, and our primary use of funds is loans. We do not expect a change in the primary source or use of our funds in the foreseeable future. We predominantly invest excess deposits in overnight deposits with the Federal Reserve,

52

securities, interest-bearing deposits at other banks or other short-term liquid investments until needed to fund loan growth. Our securities portfolio had a weighted average life of 5.45 years and an effective duration of 4.98 years as of September 30, 2018.

As of September 30, 2018, we had outstanding $142.6 million in commitments to extend credit and $85 thousand in commitments associated with outstanding commercial and standby letters of credit. Since commitments associated with letters of credit and commitments to extend credit may expire unused, the total outstanding may not necessarily reflect the actual future cash funding requirements.

As of September 30, 2018, we believe we had no exposure to future cash requirements associated with known uncertainties. Capital expenditures, including buildings and construction in process, for the nine months ended September 30, 2018 and 2017 were $4.0 million and $5.6 million, respectively.

Non-GAAP Financial Measures

Our accounting and reporting policies conform to GAAP, and the prevailing practices in the banking industry. However, we also evaluate our performance based on certain additional financial measures discussed in this Form 10-Q as being a non-GAAP financial measures. We classify a financial measure as being a non-GAAP financial measure if that financial measure excludes or includes amounts, or is subject to adjustments that have the effect of excluding or including amounts, that are included or excluded, as the case may be, in the most directly comparable measure calculated and presented in accordance with GAAP as in effect from time to time in the United States in our statements of income, balance sheets or statements of cash flows. Non-GAAP financial measures do not include operating and other statistical measures or ratios or statistical measures calculated using exclusively financial measures calculated in accordance with GAAP.

The non-GAAP financial measures that we discuss in this Form 10-Q should not be considered in isolation or as a substitute for the most directly comparable or other financial measures calculated in accordance with GAAP. Moreover, the manner in which we calculate the non-GAAP financial measures that we discuss in this Form 10-Q may differ from that of other banking organizations reporting measures with similar names. You should understand how such other banking organizations calculate their financial measures similar or with names similar to the non-GAAP financial measures we have discussed in this prospectus when comparing such non-GAAP financial measures.

Net Interest Margin

We show net interest margin on a fully taxable equivalent basis, which is a non-GAAP financial measure.

We believe the fully tax equivalent basis is the preferred industry measurement basis for net interest margin and that it enhances comparability of net interest income arising from taxable and tax-exempt sources.

The following table reconciles, as of the dates set forth below, net interest margin on a fully taxable equivalent basis:

	As of or for the Three Months Ended September30,						As of or for the Nine Months Ended September 30,
	2018			2017			2018			2017
	(Dollars in thousands, except per share data)
Net interest margin - GAAP basis:
Net interest income	$	11,690		$	10,155		$	33,153		$	28,522
Average interest-earning assets		1,007,492			961,922			981,479			946,777
Net interest margin		4.60	%		4.19	%		4.52	%		4.03	%
Net interest margin - Non-GAAP basis:
Net interest income	$	11,690		$	10,155		$	33,153		$	28,522
Plus:
Impact of fully taxable equivalent adjustment		113			240			344			702
Net interest income on a fully taxable equivalent basis	$	11,803		$	10,395		$	33,497		$	29,224
Average interest-earning assets		1,007,492			961,922			981,479			946,777
Net interest margin on a fully taxable equivalent basis -    Non-GAAP basis		4.65	%		4.29	%		4.56	%		4.13	%

Adjusted Earnings per Common Share – Basic and Diluted

Adjusted earnings per common share – basic and diluted is a non-GAAP financial measure that excludes merger related expenses. In our judgment, the adjustments made to net income allow investors and analysts to better assess our basic and diluted

53

earnings per common share by removing the volatility that is associated with merger related expenses that are unrelated to our core business.

Merger related expenses for the three and nine months ended September 30, 2018 consisted of $215 thousand, after-tax. There were no merger related expenses for the three or nine months ended September 30, 2017.  

The following table reconciles, as of the date set forth below, basic and diluted earnings per common share and presents our basic and diluted earnings per common share exclusive of the impact of our merger related adjustments:

	As of or for the Three Months Ended September 30,					As of or for the Nine Months Ended September 30,
	2018			2017		2018			2017
	(Dollars in thousands, except per share data)
Basic and diluted earnings per share - GAAP basis:
Net income	$	2,771		$	2,002	$	7,465		$	4,230
Less:
Participated securities share of undistributed earnings		—			—		—			27
Net income available to common stockholders	$	2,771		$	2,002	$	7,465		$	4,203
Weighted average number of common shares - basic		9,792,032			7,279,178		8,673,106			7,218,147
Weighted average number of common shares - diluted		10,360,301			7,565,239		9,094,691			7,504,208
Basic earnings per common share	$	0.28		$	0.28	$	0.86		$	0.58
Diluted earnings per common share	$	0.27		$	0.26	$	0.82		$	0.56
Basic and diluted earnings per share - Non-GAAP basis:
Net income	$	2,771		$	2,002	$	7,465		$	4,230
Pre-tax adjustments:
Noninterest expense
Merger related expenses		270			—		270			—
Taxes:
Tax effect of adjustments		(55	)		—		(55	)		—
Adjusted net income	$	2,986		$	2,002	$	7,680		$	4,230
Weighted average number of common shares - basic		9,792,032			7,279,178		8,673,106			7,218,147
Weighted average number of common shares - diluted		10,360,301			7,565,239		9,094,691			7,504,208
Basic earnings per common share - Non-GAAP basis	$	0.30		$	0.28	$	0.89		$	0.59
Diluted earnings per common share - Non-GAAP basis	$	0.29		$	0.26	$	0.84		$	0.56

Tangible Book Value Per Share

Tangible book value per share is a non-GAAP financial measure generally used by investors, financial analysts and investment bankers to evaluate financial institutions. We calculate (1) tangible book value per share as tangible equity divided by shares of common stock outstanding at the end of the respective period, and (2) tangible equity as common stockholders’ equity less goodwill and other intangible assets, net of accumulated amortization. The most directly comparable GAAP financial measure for tangible book value per share is book value per share.

We believe that this measure is important to many investors in the marketplace who are interested in changes from period to period in book value per share exclusive of changes in intangible assets. Goodwill and other intangible assets have the effect of increasing total book value while not increasing our tangible book value.

54

The following table reconciles, as of the dates set forth below, total stockholders’ equity to tangible equity and presents our tangible book value per share compared to our book value per share:

	September 30, 2018		June 30, 2018		March 31, 2018		December 31, 2017
	(Dollars in thousands, except per share data)
Total stockholders' equity	$	150,893	$	147,986	$	102,979	$	99,139
Less:
Goodwill and other intangible assets		7,444		7,620		7,796		7,971
Tangible stockholders' equity	$	143,449	$	140,366	$	95,183	$	91,168
Shares outstanding		9,812,481		9,786,611		7,486,611		7,280,183
Book value per share	$	15.38	$	15.12	$	13.76	$	13.62
Less:
Goodwill and other intangible assets per share		0.76		0.78		1.05		1.10
Tangible book value per share	$	14.62	$	14.34	$	12.71	$	12.52

Critical Accounting Policies

Our financial reporting and accounting policies conform to GAAP. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Our accounting policies and estimates are described in greater detail in Note 1 Summary of Significant Accounting Policies in the notes to our consolidated financial statements included elsewhere in this Form 10-Q.

We have identified the following accounting policies and estimates that, due to the difficult, subjective or complex judgments and assumptions inherent in those policies and estimates and the potential sensitivity of our financial statements to those judgments and assumptions, are critical to an understanding of our financial condition and results of operations. We believe that the judgments, estimates and assumptions used in the preparation of our financial statements are appropriate. Our accounting policies are integral to understanding our results of operations.

Allowance for Loan and Lease Losses

Management’s ongoing evaluation of the adequacy of the allowance for loan and lease losses is based on our past loan loss experience, the volume and composition of our lending, adverse situations that may affect a borrower’s ability to repay, the estimated value of any underlying collateral, current economic conditions and other factors affecting the known and inherent risk in the portfolio. The allowance for loan and lease losses is increased by charges to income through the provision for loan and lease losses and decreased by charge-offs (net of recoveries). The allowance is maintained at a level that management, based upon its evaluation, considers adequate to absorb losses inherent in the loan portfolio. This evaluation is inherently subjective as it requires material estimates including, among others, the amount and timing of expected future cash flows on impacted loans, exposure at default, value of collateral, and estimated losses on our loan portfolio. All of these estimates may be susceptible to significant change.

The allowance consists of specific allowances for impaired loans and a general allowance on the remainder of the portfolio. Although management determines the amount of each element of the allowance separately, the allowance for loan and lease losses is available for the entire loan portfolio.

Management establishes an allowance on certain impaired loans for the amount by which the discounted cash flows, observable market price, or fair value of collateral if the loan is collateral dependent, is lower than the carrying value of the loan. A loan is considered to be impaired when, based upon current information and events, it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan. A delay or shortfall in amount of payments does not necessarily result in the loan being identified as impaired.

Management also establishes a general allowance on non-impaired loans to recognize the inherent losses associated with lending activities, but which, unlike specific allowances, have not been allocated to particular loans. This general valuation allowance is determined by segregating the loans by loan category and assigning allowance percentages based on our historical loss experience, delinquency trends, and management’s evaluation of the collectability of the loan portfolio.

Management also evaluates classified loans, which are not impaired. We segregate these loans by category and assign qualitative factors to each loan based on inherent losses associated with each type of lending and consideration that these loans, in the aggregate, represent an above-average credit risk and that more of these loans will prove to be uncollectible compared to loans in the

55

general portfolio. Classification of a loan within this category is based on identified weaknesses that increase the credit risk of the loan.

The allowance is adjusted for significant factors that, in management’s judgment, affect the collectability of the portfolio as of the evaluation date. These significant factors may include changes in lending policies and procedures, changes in existing general economic and business conditions affecting its primary lending areas, credit quality trends, collateral value, loan volumes and concentrations, seasoning of the loan portfolio, loss experience in particular segments of the portfolio, duration of the current business cycle, and bank regulatory examination results. The applied loss factors are re-evaluated each reporting period to ensure their relevance in the current economic environment.

Prior to the second quarter of 2018, we were utilizing a peer bank allowance coverage ratio in the qualitative reserve calculation, as we did not have enough historical defaults to rely on our own loss factors. As of September 30, 2018, we had a sufficient amount of defaults over the five year lookback period to transition over to relying more on our own historical loss data versus peer data. While this did not result in a significant change to the allowance for loan and lease losses as a whole, it continues to impact the provision for certain loan categories that the Company had experienced more historical defaults.

While management uses the best information known to it in order to make loan loss allowance valuations, adjustments to the allowance may be necessary based on changes in economic and other conditions, changes in the composition of the loan portfolio, or changes in accounting guidance. In times of economic slowdown, either regional or national, the risk inherent in the loan portfolio could increase resulting in the need for additional provisions to the allowance for loan and lease losses in future periods. An increase could also be necessitated by an increase in the size of the loan portfolio or in any of its components even though the credit quality of the overall portfolio may be improving. Historically, the estimates of the allowance for loan and lease losses have provided adequate coverage against actual losses incurred.

Goodwill and Other Intangible Assets

Goodwill represents the excess of consideration transferred in business combinations over the fair value of tangible and identifiable intangible assets acquired. Goodwill is assessed annually for impairment or more frequently if events or circumstances indicate that impairment may have occurred.

Goodwill acquired in a purchase business combination that is determined to have an indefinite useful life, is not amortized, but tested for impairment as described above. We perform our annual impairment test in the fourth quarter. Goodwill is the only intangible asset with an indefinite life on our balance sheet.

Core deposit intangible (“CDI”) is a measure of the value of checking and savings deposit relationships acquired in a business combination. The fair value of the CDI stemming from any given business combination is based on the present value of the expected cost savings attributable to the core deposit funding relative to an alternative source of funding. CDI is amortized over the estimated useful lives of the existing deposit relationships acquired, but does not exceed 12 years. We evaluate such identifiable intangibles for impairment when events and circumstances indicate that its carrying amount may not be recoverable.

Income Taxes

Management makes estimates and judgments to calculate various tax liabilities and determine the recoverability of various deferred tax assets, which arise from temporary differences between the tax and financial statement recognition of revenues and expenses. Management also estimates a reserve for deferred tax assets if, based on the available evidence, it is more likely than not that some portion or all of the recorded deferred tax assets will not be realized in future periods. These estimates and judgments are inherently subjective. Historically, management’s estimates and judgments to calculate the deferred tax accounts have not required significant revision.

In evaluating our ability to recover deferred tax assets, management considers all available positive and negative evidence, including the past operating results and forecasts of future taxable income. In determining future taxable income, management makes assumptions for the amount of taxable income, the reversal of temporary differences and the implementation of feasible and prudent tax planning strategies. These assumptions require management to make judgments about the future taxable income and are consistent with the plans and estimates used to manage the business. Any reduction in estimated future taxable income may require management to record a valuation allowance against the deferred tax assets. An increase in the valuation allowance would result in additional income tax expense in the period and could have a significant impact on future earnings.

Stock-based Compensation

We sponsor incentive stock option plans under which options may be granted periodically to all of our full-time employees and directors or affiliates at a specific exercise price to acquire shares of our common stock. Shares are issued out of authorized unissued

56

common shares. Compensation cost is measured based on the estimated fair value of the award at the grant date and is recognized in earnings on a straight-line basis over the requisite service period. The fair value of stock options is estimated at the date of grant using the Black-Scholes option pricing model. This model requires assumptions as to the expected stock volatility, dividends, terms and risk-free rates. We use the fair value method to account for our options. The expected volatility is based on the volatility of comparable peer banks. The expected term represents the period of time that options are expected to be outstanding from the grant date. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for the appropriate life of each option.

SBA Servicing Asset

A servicing asset related to SBA loans is initially recorded when these loans are sold and the servicing rights are retained. The servicing asset is recorded on the balance sheet. An updated fair value of the servicing asset is obtained from an independent third party on a quarterly basis and any necessary adjustments are included in SBA loan servicing fees on the consolidated statements of income. The valuation begins with the projection of future cash flows for each asset based on their unique characteristics, market-based assumptions for prepayment speeds and estimated losses and recoveries. The present value of the future cash flows are then calculated utilizing market-based discount ratio assumptions. In all cases, we model expected payments for every loan for each quarterly period in order to create the most detailed cash flow stream possible. We use various assumptions and estimates in determining the impairment of the SBA servicing asset. These assumptions include prepayment speeds and discount rates commensurate with the risks involved and comparable to assumptions used by participants to value and bid serving rights available for sale in the market.

Recently Issued Accounting Pronouncements

See Note 1, Summary of Significant Accounting Policies, in the notes to the consolidated financial statements included elsewhere in this Form 10-Q regarding the impact of new accounting pronouncements which we have adopted.

Item 3.        Quantitative and Qualitative Disclosure about Market Risk

As described in more detail in our prospectus filed with the SEC pursuant to Rule 424(b) of the Securities Act of 1933, as amended, on May 4, 2018, related to our initial public offering, risk management involves the monitoring and evaluation of interest rate risk, liquidity risk, operational risk, compliance risk and strategic and/or reputation risk. The Company has not experienced any material change in these risks from December 31, 2017 to September 30, 2018. For additional disclosure of our market risks, see our prospectus filed with the SEC pursuant to Rule 424(b) of the Securities Act of 1933, as amended, on May 4, 2018, related to our initial public offering.

Item 4.        Controls and Procedures

Evaluation of Disclosure Controls and Procedures

As of the end of the period covered by this Form 10-Q, the Company carried out an evaluation, under the supervision and with the participation of its management, including its Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of its disclosure controls and procedures. In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management was required to apply judgment in evaluating its controls and procedures. Based on this evaluation, the Company’s Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures (as defined in Rules 13a‑15(e) and 15d‑15(e) under the Securities Exchange Act of 1934, as amended, or the “Exchange Act) were effective as of the end of the period covered by this report.

Internal Control over Financial Reporting

There were no changes in the Company’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the three months ended September 30, 2018 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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PART II.     OTHER INFORMATION

Item 1.        Legal Proceedings

The Company, from time to time, is involved as plaintiff or defendant in various legal actions arising in the normal course of business. While the ultimate outcome of any such proceedings cannot be predicted with certainty, it is the opinion of management, based upon advice of legal counsel, that no proceedings exist, either individually or in the aggregate, which, if determined adversely to the Company, would have a material effect on the Company’s consolidated balance sheet, results of operations or cash flows. See Note 11 “Commitments and Contingencies” in the “Notes to Consolidated Financial Statements.”

Item 1A.        Risk Factors

In evaluating an investment in any of our securities, investors should consider carefully, among other things, information under the heading “Cautionary Note Regarding Forward-Looking Statements” in this Form 10-Q, the risk factors previously disclosed under the heading “Risk Factors” in our prospectus filed with the SEC pursuant to Rule 424(b) of the Securities Act of 1933, as amended, on May 4, 2018, and such other risk factors as we may disclose in other reports and statements filed with the SEC. There have been no material changes in the risk factors disclosed by the Company in its prospectus filed with the SEC pursuant to Rule 424(b) of the Securities Act of 1933, as amended, on May 4, 2018.

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

There were no sales of equity securities by the Company during the period covered by this Form 10-Q that were not registered with the SEC under the Securities Act. On May 8, 2018, we issued and sold 2,300,000 shares of our common stock, including 300,000 shares of common stock sold pursuant to the underwriters’ full exercise of their option to purchase additional shares, in our initial public offering at an offering price of $21.00 per share, for aggregate gross proceeds of $48.3 million before deducting underwriting discounts and estimated offering expenses, and estimated  aggregate net proceeds of $42.1 million after deducting underwriting discounts and estimated offering expenses. All of the shares issued and sold in the initial public offering were registered under the Securities Act pursuant to a Registration Statement on Form S-1 (File No. 333-224172), which was declared effective by the SEC on May 3, 2018. Stephens Inc. and Keefe, Bruyette & Woods, a Stifel Company, acted as joint book-running managers for the offering. Piper Jaffray & Co. and Sandler O’Neill + Partners, L.P. acted as co-managers for the offering. There has been no material change in the planned use of proceeds from our initial public offering as described in our prospectus (File No. 333-224172), filed with the SEC on May 4, 2018 pursuant to Rule 424(b), related to our initial public offering. As of the date hereof, we used $7.8 million of net proceeds from this offering to repay in full the outstanding indebtedness under our line of credit with a third party lender, plus accrued and unpaid interest. For a description of the line of credit see Part I, Item 2 “Management’s Discussion and Analysis of Financial Condition and Results of Operations –Financial Condition—Borrowings.” We intend to use the remaining net proceeds to support our continued growth, including organic growth and potential future acquisitions, and for general corporate purposes.

Item 3.        Defaults upon Senior Securities

Not applicable.

Item 4.        Mine Safety Disclosures

Not applicable.

Item 5.        Other Information

None.

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Item 6.Exhibits

Exhibit Number	Description
2.1	Agreement and Plan of Reorganization by and between Spirit of Texas Bancshares, Inc. and Comanche National Corporation, dated as of July 19, 2018 (schedules and exhibits have been omitted pursuant to Item 601(b)(2) of Regulation S-K) (incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed with the Commission on July 19, 2018) (File No. 001-38484)
3.1	Second Amended and Restated Certificate of Formation of Spirit of Texas Bancshares, Inc. (incorporated by reference to Exhibit 3.1 to the Company’s Form S-1 filed with the Commission on April 6, 2018) (File No. 333-224172)
3.2	Amended and Restated Bylaws of Spirit of Texas Bancshares, Inc.  (incorporated by reference to Exhibit 3.2 to the Company’s Form S-1 filed with the Commission on April 6, 2018) (File No. 333-224172)
3.3	Certificate of Amendment to the Second Amended and Restated Certificate of Formation of Spirit of Texas Bancshares, Inc.(incorporated by reference to Exhibit 3.3 to the Company’s Form S-1 filed with the Commission on April 6, 2018) (File No. 333-224172)
10.1	Form of the Comanche Voting Agreement (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed with the Commission on July 19, 2018) (File No. 001-38484)
10.2	Form of Director Support Agreement (incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed with the Commission on July 19, 2018) (File No. 001-38484)
31.1*	Certification of Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Principal Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2**	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101*	The following material from Spirit of Texas Bancshares, Inc.’s Form 10-Q for the quarter ended September 30, 2018, formatted in XBRL (Extensible Business Reporting Language), filed herewith: (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Income, (iii) Consolidated Statements of Comprehensive Income, (iv) Consolidated Statements of Changes in Stockholders’ Equity, (v) Consolidated Statements of Cash Flows, and (vi) Notes to Unaudited Consolidated Financial Statements.

* Filed with this Form 10-Q

** Furnished with this Form 10-Q

59

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.

	Spirit of Texas Bancshares, Inc.
Date:     November 7, 2018	By:	/s/ Dean O. Bass
		Dean O. Bass
		Chairman and Chief Executive Officer
Date:     November 7, 2018	By:	/s/ Jeffrey A. Powell
		Jeffrey A. Powell
		EVP and Chief Financial Officer

60

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Dean O. Bass, certify that:

1. I have reviewed this Quarterly Report on Form10-Q of Spirit of Texas Bancshares, Inc. for the quarter ended September 30, 2018;

2. Based on my knowledge, this 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 report;

3. Based on my knowledge, the financial statements, and other financial information included in this 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 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)) 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 report is being prepared;

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

(c) Disclosed in this report any change in the registrant's internal control over financial reporting (as defined in the Exchange Act Rules 13a-15(f) and 15d-15(f)) that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) 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 (or persons performing the equivalent functions):

(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 control over financial reporting.

Date:     November 7, 2018	By:	/s/ Dean O. Bass
		Dean O. Bass
		Chairman and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO

RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934,

AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Jeffrey A. Powell, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Spirit of Texas Bancshares, Inc. for the quarter ended September 30, 2018;

2. Based on my knowledge, this 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 report;

3. Based on my knowledge, the financial statements, and other financial information included in this 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 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)) 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 report is being prepared;

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

(c) Disclosed in this report any change in the registrant's internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) 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 (or persons performing the equivalent functions):

(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 control over financial reporting.

Date:     November 7, 2018	By:	/s/ Jeffrey A. Powell
		Jeffrey A. Powell
		EVP and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Spirit of Texas Bancshares, Inc. (the “Company”) for the quarter ended September 30, 2018 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

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

Date:     November 7, 2018	By:	/s/ Dean O. Bass
		Dean O. Bass
		Chairman and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Spirit of Texas Bancshares, Inc. (the “Company”) for the quarter ended September 30, 2018 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

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

Date:     November 7, 2018	By:	/s/ Jeffrey A. Powell
		Jeffrey A. Powell
		EVP and Chief Financial Officer

XML

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 01, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Trading Symbol	STXB
Entity Registrant Name	Spirit of Texas Bancshares, Inc.
Entity Central Index Key	0001499453
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		9,812,481

XML

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Assets:
Cash and due from banks		$ 18,212	$ 19,054
Interest-bearing deposits in other banks		25,926	38,895
Total cash and cash equivalents		44,138	57,949
Time deposits in other banks		245	245
Investment securities:
Available for sale securities, at fair value		33,449	37,243
Total investment securities		33,449	37,243
Loans held for sale		5,500	3,814
Loans:
Loans held for investment	[1]	954,074	869,119
Less: allowance for loan and lease losses		(6,156)	(5,652)
Loans, net		947,918	863,467
Premises and equipment, net		46,135	42,189
Accrued interest receivable		3,715	3,466
Other real estate owned and repossessed assets		289	21
Goodwill		4,485	4,485
Core deposit intangible		2,959	3,486
SBA servicing asset		3,561	3,411
Deferred tax asset, net		1,667	1,480
Bank-owned life insurance		483	479
Federal Home Loan Bank and other bank stock, at cost		4,861	4,812
Other assets		2,806	3,751
Total assets		1,102,211	1,030,298
Transaction accounts:
Noninterest-bearing		207,727	176,726
Interest-bearing		222,245	250,491
Total transaction accounts		429,972	427,217
Time deposits		442,638	408,151
Total deposits		872,610	835,368
Accrued interest payable		475	407
Short-term borrowings		10,000	15,000
Long-term borrowings		64,961	76,411
Other liabilities		3,272	3,973
Total liabilities		951,318	931,159
Commitments and contingencies (Note 11)
Stockholders' Equity:
Preferred stock, $1 par value; 5 million shares authorized; 0 shares issued and outstanding
Common stock, no par value; 50 million shares authorized; 9,812,481 and 7,280,183 shares issued and outstanding		127,541	82,615
Retained earnings		24,490	17,025
Accumulated other comprehensive income (loss)		(1,138)	(501)
Total stockholders' equity		150,893	99,139
Total liabilities and stockholders' equity		$ 1,102,211	$ 1,030,298

[1] Balance includes $(3.6) million and $(3.4) million of deferred fees, cost, premium and discount as of September 30, 2018 and December 31, 2017, respectively.

XML

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares, issued	9,812,481	7,280,183
Common stock, shares, outstanding	9,812,481	7,280,183

XML

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Interest and fees on loans	$ 13,901	$ 11,842	$ 39,270	$ 33,515
Interest and dividends on investment securities	202	202	611	316
Other interest income	173	200	536	784
Total interest income	14,276	12,244	40,417	34,615
Interest expense:
Interest on deposits	2,197	1,684	5,869	4,913
Interest on FHLB advances and other borrowings	389	405	1,395	1,180
Total interest expense	2,586	2,089	7,264	6,093
Net interest income	11,690	10,155	33,153	28,522
Provision for loan losses	486	604	1,460	1,804
Net interest income after provision for loan losses	11,204	9,551	31,693	26,718
Noninterest income:
Service charges and fees	462	362	1,238	1,095
SBA loan servicing fees	529	207	1,701	1,378
Mortgage referral fees	160	158	524	531
Gain on sales of loans, net	1,369	1,392	3,884	4,710
Gain (loss) on sales of other assets		(70)	(25)	(47)
Other noninterest income	47	44	136	55
Total noninterest income	2,567	2,093	7,458	7,722
Noninterest expense:
Salaries and employee benefits	6,623	5,271	19,524	17,774
Occupancy and equipment expenses	1,279	1,239	3,736	3,742
Loan and other real estate related expenses	94	20	171	244
Professional services	624	410	1,249	1,159
Data processing and network	302	317	936	899
Regulatory assessments and insurance	266	221	787	689
Amortization of intangibles	176	176	527	527
Advertising	83	147	300	431
Marketing	115	118	354	399
Telephone expense	120	109	332	325
Other operating expenses	599	511	1,872	1,754
Total noninterest expense	10,281	8,539	29,788	27,943
Income before income tax expense	3,490	3,105	9,363	6,497
Income tax expense	719	1,103	1,898	2,267
Net income	$ 2,771	$ 2,002	$ 7,465	$ 4,230
Earnings per common share:
Basic	$ 0.28	$ 0.28	$ 0.86	$ 0.58
Diluted	$ 0.27	$ 0.26	$ 0.82	$ 0.56
Weighted average common shares outstanding:
Basic	9,792,032	7,279,178	8,673,106	7,218,147
Diluted	10,360,301	7,565,239	9,094,691	7,504,208

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,771	$ 2,002	$ 7,465	$ 4,230
Other comprehensive income (loss):
Unrealized net holding gains (losses) on investment securities available for sale, net of taxes of $16, $13, $169 and $79, respectively	(61)	(25)	(637)	(153)
Total other comprehensive income (loss)	(61)	(25)	(637)	(153)
Total comprehensive income	$ 2,710	$ 1,977	$ 6,828	$ 4,077

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Unrealized net holding gains (losses) on investment securities available for sale, tax	$ 16	$ 13	$ 169	$ 79
Reclassification adjustment for realized (gains) losses on investment securities available for sale included in net income, tax	$ 0	$ 0	$ 0	$ 0

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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Preferred Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2016	$ 92,896	$ 78,871	$ 1,753	$ 12,272
Balance (in shares) at Dec. 31, 2016		7,069,527	170,236
Net income	4,230			4,230
Conversion of preferred stock		$ 1,753	$ (1,753)
Conversion of preferred stock (in shares)		170,236	(170,236)
Issuance of common stock (in shares)		1
Exercise of stock options and warrants	471	$ 471
Exercise of stock options and warrants (in shares)		40,419
Stock-based compensation	1,361	$ 1,361
Other comprehensive income (loss)	(153)				$ (153)
Balance at Sep. 30, 2017	98,805	$ 82,456		16,502	(153)
Balance (in shares) at Sep. 30, 2017		7,280,183
Balance at Dec. 31, 2017	99,139	$ 82,615		17,025	(501)
Balance (in shares) at Dec. 31, 2017		7,280,183
Net income	7,465			7,465
Shares issued in offering, net	42,058	$ 42,058
Issuance of common stock (in shares)		2,300,000
Exercise of stock options and warrants	2,362	$ 2,362
Exercise of stock options and warrants (in shares)		232,298
Stock-based compensation	506	$ 506
Other comprehensive income (loss)	(637)				(637)
Balance at Sep. 30, 2018	$ 150,893	$ 127,541		$ 24,490	$ (1,138)
Balance (in shares) at Sep. 30, 2018		9,812,481

XML

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows From Operating Activities:
Net income	$ 7,465	$ 4,230
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for loan losses	1,460	1,804
Depreciation and amortization	1,410	1,320
Net amortization (accretion) of premium (discount) on investment securities	234	140
Amortization of intangible assets	527	527
Accretion of discount on retained SBA loans	(672)	(1,219)
Deferred tax expense (benefit)	(18)	(683)
Originations of loans held for sale	(50,963)	(55,206)
Proceeds from loans held for sale	53,152	60,335
Net gains on sale of loans held for sale	(3,884)	(4,710)
(Gain) loss on sale of other real estate owned	11	(2)
Fair value adjustment on SBA servicing asset	805	770
Stock-based compensation	506	1,361
Increase in cash surrender value of BOLI	(4)	(2)
Net change in operating assets and liabilities:
Net change in accrued interest receivable	(249)	(452)
Net change in accrued interest payable	68	93
Net change in other assets	945	835
Net change in other liabilities	(701)	(971)
Net cash provided by (used in) operating activities	10,092	8,170
Cash Flows From Investing Activities:
Purchase of investment securities available for sale		(40,419)
Paydown and maturities of investment securities available for sale	2,754	1,219
Net purchase of FHLB and other bank stock	(49)	(47)
Proceeds from the sale of loans held for investment	1,451
Net change in loans	(87,937)	(91,800)
Proceeds from the sale of other real estate owned	22	499
Purchase of premises and equipment	(5,356)	(7,709)
Proceeds from the sale of premises and equipment		55
Net cash provided by (used in) investing activities	(89,115)	(138,202)
Cash Flows From Financing Activities:
Net change in deposits	37,242	28,705
Proceeds from long-term borrowings		16,762
Repayment of long-term borrowings	(11,450)	(4,956)
Proceeds from short-term borrowings	10,000	10,000
Repayment of short-term borrowings	(15,000)	(10,000)
Shares issued in offering, net	42,058
Exercise of stock options and warrants	2,362	471
Net cash provided by (used in) financing activities	65,212	40,982
Net Change in Cash and Cash Equivalents	(13,811)	(89,050)
Cash and Cash Equivalents at Beginning of Period	57,949	152,232
Cash and Cash Equivalents at End of Period	44,138	63,182
Supplemental Disclosures of Cash Flow Information:
Interest paid	5,802	4,820
Income taxes paid	2,850	1,695
Supplemental disclosure of noncash investing and financing activities:
Transfer of loans to other real estate owned and repossessed assets	$ 301	$ 450

XML

Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Operations

Spirit of Texas Bancshares, Inc. (the “Holding Company” or “Company”) is a bank holding company headquartered in Conroe, Texas that provides, through its bank subsidiary, a variety of financial services to individuals and corporate customers in Texas, which are primarily agricultural, light industrial and commercial areas.

On March 16, 2017, the Company filed a Second Amended and Restated Certificate of Formation with the Texas Secretary of State to affect a reverse stock split of its outstanding common stock which became effective on March 16, 2017. As a result of the reverse stock split, every two shares of the Company’s issued and outstanding common stock were consolidated into one issued and outstanding share of common stock. The computations of all share and per share amounts in this Quarterly Report on Form 10-Q (this “Form 10-Q”) have been adjusted retroactively to reflect the reverse stock split.

The Company consummated the underwritten initial public offering of its common stock in May 2018. In connection with the initial public offering, the Company issued and sold 2,300,000 shares of its common stock, including 300,000 shares of common stock sold pursuant to the underwriters’ full exercise of their option to purchase additional shares, at an offering price of $21.00 per share, for aggregate gross proceeds of $48.3 million before deducting underwriting discounts and offering expenses, and aggregate net proceeds of $42.1 million after deducting underwriting discounts and offering expenses.

Basis of Presentation

The consolidated financial statements include the accounts of the Holding Company and the accounts of its wholly-owned subsidiary, Spirit of Texas Bank SSB (the “Bank”).  All significant intercompany balances and transactions have been eliminated in consolidation.  

The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and Article 8 of Regulation S-X.  Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. Operating results for the period ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018 and should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2017 included in our prospectus filed with the Securities and Exchange Commission (“SEC”) pursuant to Rule 424(b) of the Securities Act of 1933, as amended, on May 4, 2018, related to our initial public offering.

In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for the fair presentation of these consolidated financial statements have been included.  The preparation of financial statements in conformity with these accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and income and expense during the reporting periods and the related disclosures.  Although management’s estimates and assumptions are based on current expectations, estimates, forecasts and projections about future performance of the Company, such estimates and assumptions are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult for the Company to assess. 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.

Accounting Policies Recently Adopted and Pending Accounting Pronouncements

Accounting Standards Update (ASU) 2018-15, “Intangibles – Goodwill and Other – Internal Use Software – Issued in August 2018, ASU No. 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software.  The amendments of ASU 2018-15 are effective for public entities for interim and annual periods beginning after December 15, 2019 and for other entities for periods beginning after December 15, 2020.  Management will early adopt ASU 2018-15 as of January 1, 2019 as early adoption is permitted and is currently evaluating the impact the ASU will have on the consolidated financial statements.

ASU 2018-13, “Fair Value Measurement Disclosure Framework” – Issued in August 2018, ASU No. 2018-13 modifies the disclosure requirements on fair value measurements outlined in Topic 820, Fair Value Measurements.  Specifically the amendments in the ASU remove the requirements to disclose the amount and reasons for transfers between fair value hierarchy levels, the policy for timing of transfers between levels, the valuation processes for Level 3 fair value measurements, and for nonpublic entities, disclosure of the changes in unrealized gains and losses for the period included in earnings for recurring Level 3 fair value measurements.  Additionally, the ASU adds disclosure requirements regarding changes in unrealized gains and losses for the period included in other comprehensive income related to Level 3 fair value measurements, and disclosure of the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements.  The amendments of ASU 2018-13 are effective for all entities for interim and annual periods beginning after December 15, 2019.  Management will adopt the provisions of this ASU removing fair value disclosure requirements as of December 31, 2018 as early adoption of the removal provisions is allowed and will adopt the remaining provisions of the ASU as of the effective date.

ASU 2018-09, “Codification Improvements.”  Issued in July 2018, ASU No. 2018-09 makes changes to a variety of topics to clarify, correct errors in, or make minor improvements to the Accounting Standards Codification. The majority of the amendments in ASU 2018-09 will be effective in annual periods beginning after December 15, 2018. Management is currently evaluating the effects the adoption of ASU 2018-09 will have on the consolidated financial statements, results of operations and cash flows.

ASU 2018-07, “Compensation-Stock Compensation.” Issued in June 2018, ASU 2018-07 expands the scope of ASC 718 to include share-based payment transactions for acquiring goods and services from nonemployees.  The amendments also clarify that ASC 718 does not apply to share-based payments used to provide either financing to the issuer or awards granted in conjunction with selling goods or services to customers under a contract subject to ASC 606, Revenue from Contracts with Customers.  The amendments of ASU 2018-07 are effective for public entities for interim and annual periods beginning after December 15, 2018 and for other entities for periods beginning after December 15, 2019.  Management will adopt ASU 2018-07 using the public company effective date as early adoption is permitted and is currently evaluating the impact the ASU will have on the consolidated financial statements.

ASU 2017-08, “Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities.”  Issued in March 2017, ASU 2017-08 amends the amortization period for certain purchased callable debt securities held at a premium.  In particular, the amendments in ASU 2017-08 require the premium to be amortized to the earliest call date. The amendments do not, however, require an accounting change for securities held at a discount; instead, the discount continues to be amortized to maturity.  Notably, the amendments in this ASU more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities.  Securities within the scope of ASU 2017-08 are purchased debt securities that have explicit, non-contingent call features that are callable at fixed prices and on preset dates.  The amendments of ASU 2017-08 become effective for public entities for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018 and for other entities for periods beginning after December 15, 2019.    Management will adopt this ASU using the public company effective date as early adoption is permitted and is currently evaluating the impact this ASU will have on the consolidated financial statements; however, the adoption of ASU 2017-08 is not expected to have a material impact on the Company’s consolidated financial statements.

ASU 2017-04, “Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.”  Issued in January 2017, ASU 2017-04 simplifies the manner in which an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test.  Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill.  In computing the implied fair value of goodwill under Step 2, an entity, prior to the amendments in ASU 2017-04, had to perform procedures to determine the fair value at the impairment testing date of its assets and liabilities, including unrecognized assets and liabilities, in accordance with the procedure that would be required in determining the fair value of assets acquired and liabilities assumed in a business combination.  However, under the amendments in ASU 2017-04, an entity should (1) perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and (2) recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value, with the understanding that the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit.  Additionally, ASU 2017-04 removes the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails such qualitative test, to perform Step 2 of the goodwill impairment test.  ASU 2017-04 is effective prospectively for public entities for annual, or any interim, goodwill impairment tests in fiscal years beginning after December 15, 2019 and for all other entities for impairment tests in fiscal years beginning after December 15, 2021.  Management will adopt this ASU using the public company effective date as early adoption is permitted and will continue to evaluate the impact this ASU will have on the consolidated financial statements through its effective date; however, the adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements.  

ASU 2017-01, “Business Combinations (Topic 805) - Clarifying the Definition of a Business.” Issued in January 2017, ASU 2017-01 clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses, which determines whether goodwill should be recorded or not. The amendments in ASU No. 2017-01 provide a screen to determine when a set of assets and activities (collectively, a “set”) is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated.  If, however, the screen is not met, then the amendments in ASU 2017-01 require that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output and remove the evaluation of whether a market participant could replace missing elements.  The revised definition will result in more transactions being recorded as asset acquisitions or dispositions as opposed to business acquisitions or dispositions.  The amendments of ASU 2017-01 are effective for public business entities for fiscal years beginning after December 15, 2017, and for private companies for fiscal years beginning after December 15, 2018.  Management has elected to adopt this ASU using the private company effective date and is currently evaluating the impact this ASU will have on the consolidated financial statements; however, the adoption of ASU 2017-01 is not expected to have a material impact on the Company’s consolidated financial statements.  

In October 2016, the FASB issued ASU No. 2016-16, "Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory." The objective of issuing this ASU is to improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Current GAAP prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in GAAP. As such, the Board decided that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendments in this guidance eliminate the exception for an intra-entity transfer of an asset other than inventory. The amendments of this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, and for private companies for fiscal years beginning after December 15, 2018.  Early adoption is permitted for all entities as of the beginning of an annual reporting period for which financial statements (interim or annual) have not been issued or made available for issuance. That is, earlier adoption should be in the first interim period if an entity issues interim financial statements. Management has elected to adopt this ASU using the private company effective date and is currently evaluating this guidance to determine the impact on its consolidated financial position, results of operations or cash flows.

ASU 2016-13, “Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.”  Issued in June 2016, ASU 2016-13 will add FASB ASC Topic 326, “Financial Instruments-Credit Losses” and finalizes amendments to FASB ASC Subtopic 825-15, “Financial Instruments-Credit Losses.”  The amendments of ASU 2016-13 are intended to provide financial statement users with more decision-useful information related to expected credit losses on financial instruments and other commitments to extend credit by replacing the current incurred loss impairment methodology with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to determine credit loss estimates.  The amendments of ASU 2016-13 eliminate the probable initial recognition threshold and, in turn, reflect an entity’s current estimate of all expected credit losses.  ASU 2016-13 does not specify the method for measuring expected credit losses, and an entity is allowed to apply methods that reasonably reflect its expectations of the credit loss estimate.  Additionally, the amendments of ASU 2016-13 require that credit losses on available for sale debt securities be presented as an allowance rather than as a write-down.  The amendments of ASU 2016-13 are effective for public entities for interim and annual periods beginning after December 15, 2019 and for all other entities for periods beginning after December 15, 2020.  Earlier application is permitted for interim and annual periods beginning after December 15, 2018.  Management has elected to adopt this ASU using the private company effective date and is currently evaluating the impact this ASU will have on the consolidated financial statements and that evaluation will depend on economic conditions and the composition of the Company’s loan and lease portfolio at the time of adoption.

ASU 2016-02, “Leases (Topic 842).” Issued in February 2016, ASU 2016-02 was issued by the FASB to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and by disclosing key information about leasing arrangements.  ASU 2016-02 will, among other things, require lessees to recognize a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 does not significantly change lease accounting requirements applicable to lessors; however, the ASU contains some targeted improvements that are intended to align, where necessary, lessor accounting with the lessee accounting model and with the updated revenue recognition guidance issued in 2014.  The amendments of ASU 2016-02 are effective for public entities for interim and annual periods beginning after December 15, 2018 and for other entities for periods beginning after December 15, 2019.  The adoption of this ASU will result in an increase to the Consolidated Balance Sheets for right-of-use assets and associated lease liabilities for operating leases in which the Company is the lessee.  Under current accounting standards, all of the Company's leases are classified as operating leases and, as such, are not recognized on the Company's Consolidated Balance Sheet. Additionally, in July 2018, the FASB issued ASU No. 2018-10, Codification Improvements to Topic 842, Leases and ASU No. 2018-11, Leases, Targeted Improvements. The amendments in these updates provide additional clarification and implementation guidance on certain aspects of ASU 2016-02 and have the same effective and transition requirements as ASU 2016-02. Specifically, ASU 2018-11 creates an additional transition method option allowing entities to record a cumulative effect adjustment to opening retained earnings in the year of adoption.  Management will adopt these ASU’s using the public company effective date as early adoption is permitted and is currently evaluating the impact to the consolidated financial statements and related method of adoption, specifically, we are in the process of reviewing service contracts to determine if right-of-use assets exist.

ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” Issued in May 2014, ASU 2014-09 will add FASB ASC Topic 606, “Revenue from Contracts with Customers,” and will supersede revenue recognition requirements in FASB ASC Topic 605, “Revenue Recognition,” as well as certain cost guidance in FASB ASC Topic 605-35, “Revenue Recognition – Construction-Type and Production-Type Contracts.” ASU 2014-09 provides a framework for revenue recognition that replaces the existing industry and transaction specific requirements under the existing standards.  ASU 2014-09 requires an entity to apply a five-step model to determine when to recognize revenue and at what amount.  The model specifies that revenue should be recognized when (or as) an entity transfers control of goods or services to a customer at the amount in which the entity expects to be entitled.  Depending on whether certain criteria are met, revenue should be recognized either over time, in a manner that depicts the entity’s performance, or at a point in time, when control of the goods or services are transferred to the customer.  ASU 2014-09 provides that an entity should apply the following steps: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when, or as, the entity satisfies a performance obligation.  In addition, the existing requirements for the recognition of a gain or loss on the transfer of non-financial assets that are not in a contract with a customer are amended to be consistent with the guidance on recognition and measurement in ASU 2014-09.  The amendments of ASU 2014-09 may be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application.  If the transition method of application is elected, the entity should also provide the additional disclosures in reporting periods that include the date of initial application of (1) the amount by which each financial statement line item is affected in the current reporting period, as compared to the guidance that was in effect before the change, and (2) an explanation of the reasons for significant changes.  ASU 2015-14, “Revenue from Contracts with Customers (Topic 606)-Deferral of the Effective Date,” issued in August 2015, defers the effective date of ASU 2014-09 by one year.  ASU 2015-14 provides that the amendments of ASU 2014-09 become effective for public business entities for fiscal years beginning after December 15, 2017, and for private companies for fiscal years beginning after December 15, 2018.  All subsequently issued ASU’s which provide additional guidance and clarifications to various aspects of FASB ASC Topic 606 will become effective when the amendments of ASU 2014-09 become effective.  These subsequently issued ASU’s include ASU 2016-08 “Revenue from Contracts with Customers (Topic 606)-Principal versus Agent Considerations,” ASU 2016-10 “Revenue from Contracts with Customers (Topic 606)-Identifying Performance Obligations and Licensing,” and ASU 2016-12 “Revenue from Contracts with Customers (Topic 606)-Narrow Scope Improvements and Practical Expedients.”  These amendments clarify the main provisions of ASU-2014-09 with respect to specific revenue types based upon implementation questions submitted.  Specifically, revenue in which a third party satisfies a portion of the performance obligations, revenue from licensing activities, and the assessment of collectability, treatment of sales taxes, non-cash consideration, and contract modifications at transition.  Management has elected to adopt this ASU using the private company effective date and has completed an analysis to determine which revenue streams are within the scope of ASU 2014-09 and the associated impact on those revenue streams.  Management has determined that approximately 5% of the revenues earned by the Company are within the scope of ASU 2014-09, and, for most of the revenue streams within the scope of ASU 2014-09, the amendments do not change the timing or amount of revenue recognized.  Management will adopt this ASU using the modified retrospective method of application and does not anticipate recording a cumulative adjustment for prior periods presented.

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Investment Securities

9 Months Ended

Sep. 30, 2018

Investments Debt And Equity Securities [Abstract]

Investment Securities

NOTE 2. INVESTMENT SECURITIES

The amortized cost, gross unrealized gains and losses and approximate fair values of securities available for sale are as follows:

	Amortized		Unrealized				Fair
September 30, 2018	Cost		Gains		Losses		Value
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	2,014	$	—	$	108	$	1,906
Residential mortgage-backed securities		27,197		—		1,149		26,048
Corporate bonds and other debt securities		5,678		—		183		5,495
Total available for sale	$	34,889	$	—	$	1,440	$	33,449

	Amortized		Unrealized				Fair
December 31, 2017	Cost		Gains		Losses		Value
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	2,010	$	—	$	61	$	1,949
Residential mortgage-backed securities		30,156		—		527		29,629
Corporate bonds and other debt securities		5,711		—		46		5,665
Total available for sale	$	37,877	$	—	$	634	$	37,243

There were no securities pledged at September 30, 2018 or December 31, 2017, respectively.

The amortized cost and estimated fair value of securities available for sale, by contractual maturity, are as follows:

	Amortized		Fair
September 30, 2018	Cost		Value
	(Dollars in thousands)
Available for sale:
Due in one year or less	$	—	$	—
Due after one year through five years		4,117		3,998
Due after five years through ten years		3,098		2,954
Due after ten years		477		449
Residential mortgage-backed securities		27,197		26,048
Total available for sale	$	34,889	$	33,449

For purposes of the maturity table, residential mortgage-backed securities, the principal of which are repaid periodically, are presented as a single amount. The expected lives of these securities will differ from contractual maturities because borrowers may have the right to prepay the underlying loans with or without prepayment penalties.

The following tables present the estimated fair values and gross unrealized losses on investment securities available for sale, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position as of the periods presented:

	Less than 12 Months				12 Months or More				Total
September 30, 2018	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	—	$	—	$	1,906	$	108	$	1,906	$	108
Residential mortgage-backed securities		1,121		63		24,925		1,086		26,046		1,149
Corporate bonds and other debt securities		2,551		81		2,944		102		5,495		183
Total available for sale	$	3,672	$	144	$	29,775	$	1,296	$	33,447	$	1,440

	Less than 12 Months				12 Months or More				Total
December 31, 2017	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	1,949	$	61	$	—	$	—	$	1,949	$	61
Residential mortgage-backed securities		29,627		527		—		—		29,627		527
Corporate bonds and other debt securities		5,665		46		—		—		5,665		46
Total available for sale	$	37,241	$	634	$	—	$	—	$	37,241	$	634

At September 30, 2018, the Company’s securities portfolio consisted of 50 securities, 49 of which were in an unrealized loss position. Six of the 49 securities in an unrealized loss position at September 30, 2018 were in an unrealized loss position for less than 12 months. The unrealized losses for these securities resulted primarily from changes in interest rates and spreads.

The Company monitors its investment securities for other-than-temporary-impairment (“OTTI”). Impairment is evaluated on an individual security basis considering numerous factors, and its relative significance. The Company has evaluated the nature of unrealized losses in the investment securities portfolio to determine if OTTI exists. The unrealized losses relate to changes in market interest rates and specific market conditions that do not represent credit-related impairments. Furthermore, the Company does not intend to sell nor is it more likely than not that it will be required to sell these investments before the recovery of their amortized cost basis. Management has completed an assessment of each security in an unrealized loss position for credit impairment and has determined that no individual security was other-than-temporarily impaired at September 30, 2018. The following describes the basis under which the Company has evaluated OTTI:

U.S. Government Agencies and Residential Mortgage-Backed Securities (“MBS”):

The unrealized losses associated with U.S. Government agencies and residential MBS are primarily driven by changes in interest rates. These securities have either an explicit or implicit U.S. government guarantee.

Corporate Bonds & Other Debt Securities:

Securities are generally underwritten in accordance with the Company’s investment standards prior to the decision to purchase, without relying on a bond issuer’s guarantee in making the investment decision. These investments are investment grade and will continue to be monitored as part of the Company’s ongoing impairment analysis, but are expected to perform in accordance with their terms.

There were no securities sold for the three or nine months ended September 30, 2018 or 2017.

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Loans, Net

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Loans, Net

NOTE 3. LOANS, NET

Loans consisted of the following at September 30, 2018 and December 31, 2017:

	September 30, 2018			December 31, 2017
	(Dollars in thousands)
Commercial and industrial loans (1)	$	159,776		$	135,040
Real estate:
1-4 single family residential loans		244,633			232,510
Construction, land and development		155,778			139,470
Commercial real estate loans (including multifamily)		324,212			285,731
Consumer loans and leases		18,174			22,736
Municipal and other loans		51,501			53,632
Total loans held in portfolio (2)	$	954,074		$	869,119
Allowance for loan losses		(6,156	)		(5,652	)
Loans held in portfolio, net	$	947,918		$	863,467

(1) Balance includes $75.9 million and $67.1 million of the unguaranteed portion of SBA loans as of September 30, 2018 and December 31, 2017, respectively.

(2) Balance includes $(3.6) million and $(3.4) million of deferred fees, cost, premium and discount as of September 30, 2018 and December 31, 2017, respectively.

At September 30, 2018 and December 31, 2017, the Company had pledged loans as collateral for FHLB advances of $376.4 million and $358.2 million, respectively. There were no recorded investments of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings are in process as of September 30, 2018 and December 31, 2017.

The Company originates and sells loans secured by the SBA. The Company retains the unguaranteed portion of the loan and servicing on the loans sold and receives a fee based upon the principal balance outstanding. During the three months ended September 30, 2018 and 2017, the Company sold approximately $19.0 million and $16.9 million, respectively, in loans to third parties. The loan sales resulted in realized gains of $1.4 million and $1.4 million for the three months ended September 30, 2018 and 2017, respectively. During the nine months ended September 30, 2018 and 2017, the Company sold approximately $49.0 million and $52.3 million, respectively, in loans to third parties. The loan sales resulted in realized gains of $3.9 million and $4.7 million for the nine months ended September 30, 2018 and 2017, respectively.

During the second quarter of 2018, the Company sold a loan to one of its directors for $1.5 million.  No gain or loss was recognized on this transaction.

In the ordinary course of business, the Company makes loans to executive officers and directors. Loans to these related parties, including companies in which they are principal owners, are as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
	(Dollars in thousands)
Principal outstanding, beginning of year	$	421		$	516		$	463		$	9,036
Additions (reductions) of affiliations		—			—			—			(8,425	)
New loans made in current year		—			—			—			—
Repayments (1)		(19	)		(26	)		(61	)		(121	)
Principal outstanding, end of year	$	402		$	490		$	402		$	490

(1) During the three months ended June 30, 2017 there was a reclassification of repayments to reductions of affiliations.

There were no unfunded commitments to related parties at September 30, 2018 or December 31, 2017.

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Allowance for Loan and Lease Losses

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Allowance for Loan and Lease Losses

NOTE 4. ALLOWANCE FOR LOAN AND LEASE LOSSES

The allowance for loan and lease losses is a reserve established through a provision for loan losses charged to expense, which represents management’s best estimate of probable losses that have been incurred within the existing portfolio of loans.  The allowance, in the judgment of management, is necessary to reserve for estimated loan losses and risks inherent in the loan portfolio. The methodology is based on historical loss experience by type of credit and internal risk grade, changes in the composition and volume of the portfolio, and specific loss allocations, with adjustments for current events and conditions. The Company’s process for determining the appropriate level of the allowance for loan and lease losses is designated to account for credit deterioration as it occurs.

During 2017, the Company refined its allowance for loan loss methodology based upon management’s judgment and applicable regulatory guidance.  The calculation of reserves on loans collectively evaluated for impairment was altered to reflect five years of historical loss experience which more appropriately matches the weighted average life of loans in the portfolio.  Additionally, the calculated historical loss experience is now allocated across the portfolio’s risk rates using a probability of default curve constructed from the Bank’s historical default data. Management also updated the qualitative component of the reserve on loans collectively evaluated for impairment to allow for a greater sensitivity to current trends.

Prior to the second quarter of 2018, the Company was utilizing a peer bank allowance coverage ratio in the qualitative reserve calculation, as the Company did not have enough historical defaults to rely on its own loss factors. As of September 30, 2018, the Company had a sufficient amount of defaults over the five year lookback period to transition over to relying more on its own historical loss data versus peer data. While this did not result in a significant change to the allowance for loan and lease losses as a whole, it continues to impact the provision for certain loan categories in which the Company had experienced more historical defaults.

The following tables present information related to allowance for loan and lease losses for the periods presented:

	Allowance Rollforward
Three Months Ended September 30, 2018	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	4,886	$	(275	)	$	4	$	76		$	4,691
Real estate:
1-4 single family residential loans		318		—			—		(216	)		102
Construction, land and development loans		195		—			—		256			451
Commercial real estate loans (including multifamily)		233		—			—		495			728
Consumer loans and leases		346		(74	)		—		(90	)		182
Municipal and other loans		37		—			—		(35	)		2
Ending allowance balance	$	6,015	$	(349	)	$	4	$	486		$	6,156

	Allowance Rollforward
Three Months Ended September 30, 2017	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	2,582	$	(15	)	$	—	$	20		$	2,587
Real estate:
1-4 single family residential loans		732		—			—		201			933
Construction, land and development loans		412		—			—		103			515
Commercial real estate loans (including multifamily)		800		—			—		255			1,055
Consumer loans and leases		204		(16	)		—		(15	)		173
Municipal and other loans		161		—			—		40			201
Ending allowance balance	$	4,891	$	(31	)	$	—	$	604		$	5,464

	Allowance Rollforward
Nine Months Ended September 30, 2018	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	3,046	$	(920	)	$	73	$	2,492		$	4,691
Real estate:
1-4 single family residential loans		902		(5	)		—		(795	)		102
Construction, land and development loans		441		—			—		10			451
Commercial real estate loans (including multifamily)		898		—			—		(170	)		728
Consumer loans and leases		198		(104	)		—		88			182
Municipal and other loans		167		—			—		(165	)		2
Ending allowance balance	$	5,652	$	(1,029	)	$	73	$	1,460		$	6,156

	Allowance Rollforward
Nine Months Ended September 30, 2017	Beginning Balance		Charge-offs			Recoveries		Provision		Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	2,347	$	(555	)	$	2	$	793	$	2,587
Real estate:
1-4 single family residential loans		647		—			—		286		933
Construction, land and development loans		364		—			—		151		515
Commercial real estate loans (including multifamily)		667		(15	)		—		403		1,055
Consumer loans and leases		186		(129	)		—		116		173
Municipal and other loans		146		—			—		55		201
Ending allowance balance	$	4,357	$	(699	)	$	2	$	1,804	$	5,464

Credit Quality Indicators

In evaluating credit risk, the Company looks at multiple factors; however, management considers delinquency status to be the most meaningful indicator of the credit quality of 1-4 single family residential, home equity loans and lines of credit and consumer loans. Delinquency statistics are updated at least monthly. Internal risk ratings are considered the most meaningful indicator of credit quality for commercial, construction, land and development and commercial real estate loans. Internal risk ratings are updated on a continuous basis.

The following tables present an aging analysis of the recorded investment for delinquent loans by portfolio and segment:

	Accruing
September 30, 2018	Current		30 to 59 Days Past Due		60 to 89 Days Past Due		90 Days or More Past Due		Non- Accrual		Total
	(Dollars in thousands)
Commercial and industrial loans	$	155,996	$	1,246	$	113	$	—	$	2,421	$	159,776
Real estate:
1-4 single family residential loans		242,606		776		—		426		825		244,633
Construction, land and development		155,767		11		—		—		—		155,778
Commercial real estate loans (including multifamily)		324,212		—		—		—		—		324,212
Consumer loans and leases		18,051		37		14		—		72		18,174
Municipal and other loans		51,501		—		—		—		—		51,501
Total loans	$	948,133	$	2,070	$	127	$	426	$	3,318	$	954,074

	Accruing
December 31, 2017	Current		30 to 59 Days Past Due		60 to 89 Days Past Due		90 Days or More Past Due		Non- Accrual		Total
	(Dollars in thousands)
Commercial and industrial loans	$	132,775	$	302	$	3	$	33	$	1,927	$	135,040
Real estate:
1-4 single family residential loans		230,738		637		—		—		1,135		232,510
Construction, land and development		139,470		—		—		—		—		139,470
Commercial real estate loans (including multifamily)		284,869		415		—		—		447		285,731
Consumer loans and leases		22,538		98		47		—		53		22,736
Municipal and other loans		53,632		—		—		—		—		53,632
Total loans	$	864,022	$	1,452	$	50	$	33	$	3,562	$	869,119

There was one loan 90 days or more past due and still accruing at September 30, 2018 with a recorded investment of $426 thousand. There was one loan 90 days or more past due and still accruing at December 31, 2017 with a recorded investment of $33 thousand.

At September 30, 2018, non-accrual loans that were 30 to 59 days past due were $355 thousand, non-accrual loans that were 60 to 89 days past due were $337 thousand, and non-accrual loans that were 90 days or more past due were $917 thousand. At December 31, 2017, non-accrual loans that were 30 to 59 days past due were $209 thousand, non-accrual loans that were 60 to 89 days past due were $57 thousand, and non-accrual loans that were 90 days or more past due were $427 thousand.

Loans exhibiting potential credit weaknesses that deserve management’s close attention and that if left uncorrected may result in deterioration of the repayment capacity of the borrower are categorized as special mention. Loans with well-defined credit weaknesses including payment defaults, declining collateral values, frequent overdrafts, operating losses, increasing balance sheet leverage, inadequate cash flow, project cost overruns, unreasonable construction delays, past due real estate taxes or exhausted interest reserves are assigned an internal risk rating of substandard. Loans classified as substandard can be on an accrual or non-accrual basis, as determined by its unique characteristics. A loan with a weakness so severe that collection in full is highly questionable or improbable will be assigned an internal risk rating of doubtful.

The following table summarizes the Company’s loans by key indicators of credit quality:

September 30, 2018	Pass		Special Mention		Substandard		Doubtful
	(Dollars in thousands)
Commercial and industrial loans	$	151,088	$	2,904	$	5,597	$	187
Real estate:
1-4 single family residential loans		240,081		—		4,552		—
Construction, land and development		154,305		315		1,158		—
Commercial real estate loans (including multifamily)		312,574		9,786		1,852		—
Consumer loans and leases		18,046		—		128		—
Municipal and other loans		51,501		—		—		—
Total loans	$	927,595	$	13,005	$	13,287	$	187

December 31, 2017	Pass		Special Mention		Substandard		Doubtful
	(Dollars in thousands)
Commercial and industrial loans	$	129,288	$	2,331	$	3,421	$	—
Real estate:
1-4 single family residential loans		228,450		1,090		2,970		—
Construction, land and development		137,760		1,403		307		—
Commercial real estate loans (including multifamily)		276,096		5,877		3,758		—
Consumer loans and leases		22,528		—		208		—
Municipal and other loans		53,632		—		—		—
Total loans	$	847,754	$	10,701	$	10,664	$	—

Internal risk ratings and other credit metrics are key factors in identifying loans to be individually evaluated for impairment and impact management’s estimates of loss factors used in determining the amount of the allowance for loan and lease losses.

The following table shows the Company’s investment in loans disaggregated based on the method of evaluating impairment:

	Loans - Recorded Investment				Allowance for Credit Loss
September 30, 2018	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
	(Dollars in thousands)
Commercial and industrial loans	$	2,494	$	157,282	$	1,085	$	3,606
Real estate:
1-4 single family residential loans		970		243,663		—		102
Construction, land and development		—		155,778		—		451
Commercial real estate loans (including multifamily)		—		324,212		—		728
Consumer loans and leases		72		18,102		24		158
Municipal and other loans		—		51,501		—		2
Total loans	$	3,536	$	950,538	$	1,109	$	5,047

	Loans - Recorded Investment				Allowance for Credit Loss
December 31, 2017	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
	(Dollars in thousands)
Commercial and industrial loans	$	2,194	$	132,846	$	1,226	$	1,820
Real estate:
1-4 single family residential loans		1,292		231,218		119		783
Construction, land and development		—		139,470		—		441
Commercial real estate loans (including multifamily)		447		285,284		—		898
Consumer loans and leases		53		22,683		16		182
Municipal and other loans		—		53,632		—		167
Total loans	$	3,986	$	865,133	$	1,361	$	4,291

The following tables set forth certain information regarding the Company’s impaired loans that were evaluated for specific reserves:

	Impaired Loans - With Allowance						Impaired Loans - With no Allowance
September 30, 2018	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance
	(Dollars in thousands)
Commercial and industrial loans	$	1,784	$	6,159	$	1,085	$	710	$	1,514
Real estate:
1-4 single family residential loans		—		—		—		970		1,000
Construction, land and development		—		—		—		—		—
Commercial real estate loans (including multifamily)		—		—		—		—		—
Consumer loans and leases		54		55		24		18		18
Municipal and other loans		—		—		—		—		—
Total loans	$	1,838	$	6,214	$	1,109	$	1,698	$	2,532

	Impaired Loans - With Allowance						Impaired Loans - With no Allowance
December 31, 2017	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance
	(Dollars in thousands)
Commercial and industrial loans	$	1,811	$	1,850	$	1,226	$	383	$	386
Real estate:
1-4 single family residential loans		119		119		119		1,173		1,174
Construction, land and development		—		—		—		—		—
Commercial real estate loans (including multifamily)		—		—		—		447		447
Consumer loans and leases		53		52		16		—		—
Municipal and other loans		—		—		—		—		—
Total loans	$	1,983	$	2,021	$	1,361	$	2,003	$	2,007

	Three Months Ended September 30,
	2018				2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(Dollars in thousands)
Commercial and industrial loans	$	2,571	$	—	$	2,220	$	—
Real estate:
1-4 single family residential loans		975		—		750		—
Construction, land and development		—		—		312		—
Commercial real estate loans (including multifamily)		—		—		1,997		—
Consumer loans and leases		72		—		55		—
Municipal and other loans		—		—		—		—
Total loans	$	3,618	$	—	$	5,334	$	—

	Nine Months Ended September 30,
	2018				2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(Dollars in thousands)
Commercial and industrial loans	$	2,774	$	—	$	2,363	$	—
Real estate:
1-4 single family residential loans		990		—		756		—
Construction, land and development		—		—		316		—
Commercial real estate loans (including multifamily)		—		—		1,983		—
Consumer loans and leases		76		—		56		—
Municipal and other loans		—		—		—		—
Total loans	$	3,840	$	—	$	5,474	$	—

Troubled Debt Restructurings:

The following table provides a summary of troubled debt restructurings (“TDRs”) based upon delinquency status, all of which are considered impaired:

	September 30, 2018				December 31, 2017
	Number of contracts		Recorded Investment		Number of contracts		Recorded Investment
	(Dollars in thousands)
Performing TDRs:
Commercial and industrial loans		4	$	73		5	$	270
Real estate:
1-4 single family residential loans		2		145		—		—
Construction, land and development		—		—		—		—
Commercial real estate loans (including multifamily)		—		—		—		—
Consumer loans and leases		—		—		—		—
Municipal and other loans		—		—		—		—
Total performing TDRs		6		218		5		270
Nonperforming TDRs		5		470		10		651
Total TDRs		11	$	688		15	$	921
Allowance attributable to TDRs			$	113			$	411

The following table summarizes TDRs and includes newly designated TDRs as well as modifications made to existing TDRs. Modifications may include, but are not limited to, granting a material extension of time, entering into a forbearance agreement, adjusting the interest rate, accepting interest only payments for an extended period of time, a change in the amortization period or a combination of any of these. Post-modification balances represent the recorded investment at the end of Day 2 in which the modification was made:

	Three Months Ended September 30,
	2018								2017
	Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance		Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance
	(Dollars in thousands)
Commercial and industrial loans		—	$	—	$	—	$	—		2	$	38	$	38	$	—
Real estate:
1-4 single family residential loans		—		—		—		—		—		—		—		—
Construction, land and development		—		—		—		—		—		—		—		—
Commercial real estate loans (including    multifamily)		—		—		—		—		—		—		—		—
Consumer loans and leases		—		—		—		—		—		—		—		—
Municipal and other loans		—		—		—		—		—		—		—		—

	Nine Months Ended September 30,
	2018								2017
	Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance		Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance
	(Dollars in thousands)
Commercial and industrial loans		7	$	442	$	442	$	113		10	$	465	$	465	$	126
Real estate:
1-4 single family residential loans		1		34		34		—		—		—		—		—
Construction, land and development		—		—		—		—		—		—		—		—
Commercial real estate loans (including    multifamily)		—		—		—		—		—		—		—		—
Consumer loans and leases		—		—		—		—		—		—		—		—
Municipal and other loans		—		—		—		—		—		—		—		—

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Goodwill and Intangibles

9 Months Ended

Sep. 30, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles

NOTE 5. GOODWILL AND INTANGIBLES

Goodwill and other intangible assets, which consist of core deposit intangibles, are summarized as follows:

	September 30, 2018			December 31, 2017
	(Dollars in thousands)
Goodwill	$	4,485		$	4,485
Core deposit intangible		7,179			7,179
Total		11,664			11,664
Less: Accumulated amortization		(4,220	)		(3,693	)
Total, net	$	7,444		$	7,971

Amortization expense for core deposit intangibles for the nine months ended September 30, 2018 and 2017 totaled $527 thousand each.

The estimated amount of amortization expense for core deposit intangible assets to be recognized over the next five fiscal years is as follows:

Type of intangibles	Remainder of 2018		2019		2020		2021		2022		2023
	(Dollars in thousands)
Core deposit intangible	$	176	$	703	$	703	$	607	$	371	$	239

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SBA Servicing Asset

9 Months Ended

Sep. 30, 2018

Transfers And Servicing Of Financial Assets [Abstract]

SBA Servicing Asset

NOTE 6. SBA SERVICING ASSET

SBA servicing assets are recognized separately when rights are acquired through the sale of the guaranteed portion of SBA loans. These servicing rights are initially measured at fair value at the date of sale and included in the gain on sale. Updated fair values are obtained from an independent third party on a quarterly basis and adjustments are presented in SBA loan servicing fees on the consolidated statements of income. To determine the fair value of SBA servicing rights, the Company uses market prices for comparable servicing contracts, when available, or alternatively, uses a valuation model that calculates the present value of estimated future net servicing income.

Loans serviced for others are not included in the accompanying balance sheets.  The unpaid principal balances of loans serviced for others were $299.6 million and $275.2 million at September 30, 2018 and December 31, 2017, respectively.

The risks inherent in the SBA servicing asset relate primarily to changes in prepayments that result from shifts in interest rates.  The following summarizes the activity pertaining to SBA servicing rights, which are in the consolidated balance sheets, for the three and nine months ended September 30, 2018 and 2017:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
	(Dollars in thousands)
Beginning balance	$	3,521		$	3,515		$	3,411		$	3,132
Origination of servicing assets		376			367			955			1,132
Change in fair value:
Due to run-off		(254	)		(216	)		(707	)		(600	)
Due to market changes		(82	)		(172	)		(98	)		(170	)
Ending balance	$	3,561		$	3,494		$	3,561		$	3,494

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Deposits

9 Months Ended

Sep. 30, 2018

Banking And Thrift [Abstract]

Deposits

NOTE 7. DEPOSITS

The following table sets forth the Company’s deposits by category:

	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Noninterest-bearing demand deposits	$	207,727	$	176,726
Interest-bearing NOW accounts		7,865		7,318
Savings and money market accounts		214,380		243,173
Time deposits		442,638		408,151
Total deposits	$	872,610	$	835,368
Time deposits $100,000 and greater	$	346,844	$	314,102
Time deposits $250,000 and greater		90,056		82,816
Related party deposits (executive officers and directors)		12,983		13,914

The aggregate amount of overdraft demand deposits reclassified to loans was $15 thousand and $27 thousand at September 30, 2018 and December 31, 2017, respectively. The aggregate amount of maturities for time deposits for each of the five years following the latest balance sheet date totaled $267.8 million, $132.9 million, $22.7 million, $9.7 million and $9.5 million, respectively.

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Stock-Based Compensation and Other Benefit Plans

9 Months Ended

Sep. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation and Other Benefit Plans

NOTE 8. STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS

Spirit of Texas Bancshares, Inc. 2008 Stock Plan (the “2008 Stock Plan”)

Option activity for the period indicated is summarized as follows:

	2008 Stock Plan
	Options			Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		1,415,350		$	12.59
Granted		—
Exercised		(192,928	)	$	10.63	$	2,114
Forfeited (1)		(18,750	)	$	13.33	$	155
Expired		—
Outstanding at September 30, 2018		1,203,672		$	12.89	$	10,472		4.92
Exercisable at September 30, 2018		990,457		$	12.58	$	8,924		4.47
Vested at September 30, 2018		990,457		$	12.58	$	8,924		4.47

(1) Forfeitures are accounted for in the period they occur.

The total unrecognized compensation cost of $764 thousand related to the 2008 Stock Plan for the share awards outstanding at September 30, 2018 will be recognized over a weighted average remaining period of 2.00 years.

Spirit of Texas Bancshares, Inc. 2017 Stock Plan (the “2017 Stock Plan”)

Option activity for the period indicated is summarized as follows:

	2017 Stock Plan
	Options		Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		127,927	$	15.00
Granted		83,340		20.69	$	75
Exercised		—
Forfeited (1)		—
Expired		—
Outstanding at September 30, 2018		211,267	$	17.25	$	917		8.89
Exercisable at September 30, 2018		77,335	$	15.00	$	510		8.41
Vested at September 30, 2018		77,335	$	15.00	$	510		8.41

(1) Forfeitures are accounted for in the period they occur.

The fair values of the stock options granted for the nine months ended September 30, 2018 were determined utilizing the Black-Scholes pricing model methodology. A summary of assumptions used to calculate the fair values of the 2017 Stock Plan awards is presented below:

	2017 Stock Plan
	Nine Months Ended
	September 30, 2018
Expected volatility		23	%
Expected dividend yield		0.0	%
Expected term (years)	7.5
Risk-free interest rate	2.36 - 2.87%
Weighted average grant date fair value	$	6.77

The expected volatility is based on the volatility of comparable peer banks. The expected term represents the period of time that the 2017 Stock Plan awards are expected to be outstanding from the date of grant. The risk-free interest rate is based on the U.S. Treasury yields for the expected term of the instrument.

The total unrecognized compensation cost of $687 thousand related to the 2017 Stock Plan for the share awards outstanding at September 30, 2018 will be recognized over a weighted average remaining period of 4.31 years.

Warrants

Activity for the Spirit of Texas Bancshares, Inc. 2008 Warrants for the period indicated is summarized as follows:

	Spirit of Texas Bancshares, Inc. 2008 Warrants
	Warrants			Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		105,000		$	10.00
Granted		—
Exercised		(45,000	)	$	10.00	$	522
Forfeited (1)		—
Expired		—
Outstanding at September 30, 2018		60,000		$	10.00	$	695		0.13
Exercisable at September 30, 2018		60,000		$	10.00	$	695		0.13
Vested at September 30, 2018		60,000		$	10.00	$	695		0.13

(1) Forfeitures are accounted for in the period they occur.

There is no remaining expense to be recognized on the Spirit of Texas Bancshares, Inc. 2008 Warrants.

Activity for the Bank4Texas Warrants for the period indicated is summarized as follows:

	Bank4Texas Warrants
	Warrants			Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		12,072		$	10.50
Granted		—
Exercised		(1,362	)	$	10.50	$	15
Forfeited (1)		—
Expired		—
Outstanding at September 30, 2018		10,710		$	10.50	$	119		1.90
Exercisable at September 30, 2018		10,710		$	10.50	$	119		1.90
Vested at September 30, 2018		10,710		$	10.50	$	119		1.90

(1) Forfeitures are accounted for in the period they occur.

There was no activity during the nine months ended September 30, 2018 on the Oasis Warrants.

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Basic and Diluted Earnings Per Common Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Basic and Diluted Earnings Per Common Share

NOTE 9. BASIC AND DILUTED EARNINGS PER COMMON SHARE

The following table presents the computation of basic and diluted EPS:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
	(Dollars in thousands, except per share data)
Net income as reported	$	2,771	$	2,002	$	7,465	$	4,230
Less: Participated securities share of undistributed earnings		—		—		—		27
Net income available to common stockholders	$	2,771	$	2,002	$	7,465	$	4,203
Weighted average number of common shares - basic		9,792,032		7,279,178		8,673,106		7,218,147
Effect of dilutive securities:
Employee stock-based compensation awards and warrants		568,269		286,061		421,585		286,061
Weighted average number of common shares - diluted		10,360,301		7,565,239		9,094,691		7,504,208
Basic earnings per common share	$	0.28	$	0.28	$	0.86	$	0.58
Diluted earnings per common share	$	0.27	$	0.26	$	0.82	$	0.56
Anti-dilutive warrants and stock options		7,246		261,475		78,490		261,475

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Income Taxes

9 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Income Taxes

NOTE 10. INCOME TAXES

The Company estimates both permanent and temporary differences in computing its interim tax provision. This effective tax rate is based on actual pre-tax income which approximates the effective tax rate based on forecasted annual pre-tax income, permanent tax differences and statutory tax rates.

The effective tax rates for the three months ended September 30, 2018 and 2017 were 20.6% and 35.5%, respectively. The decrease in the effective tax rate for the three months ended September 30, 2018 was primarily due to the enactment of the 2017 Tax Cuts and Jobs Act (the “Tax Reform”) which reduced the corporate tax rate from 34.0% to 21.0%.

The effective tax rates for the nine months ended September 30, 2018 and 2017 were 20.3% and 34.9%, respectively. The decrease in the effective tax rate for the nine months ended September 30, 2018 was primarily due to the enactment of the Tax Reform which reduced the corporate tax rate from 34.0% to 21.0%.

The Company recorded an uncertain tax position at December 31, 2017 arising from a deduction taken on the 2016 federal return related to a request for change in accounting method.  The total amount of the recorded uncertain tax position at December 31, 2017 was $903 thousand and is included in other liabilities. During the second quarter of 2018, the Company filed an amended return and the uncertain tax position was settled against the balance left on account with the IRS.  The Company’s policy is to classify interest and penalties associated with income taxes within other expenses. The Company did not record interest and penalties associated with income taxes for the three or nine months ended September 30, 2018 or 2017.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2018

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 11. COMMITMENTS AND CONTINGENCIES

The Company issues off-balance sheet financial instruments in connection with its lending activities and to meet the financing needs of its customers. These financial instruments include commitments to fund loans and lines of credit as well as commercial and standby letters of credit. These commitments expose the Company to varying degrees of credit and market risk which are essentially the same as those involved in extending loans to customers. The Company follows the same credit policies in making commitments as it does for instruments recorded on the Company’s consolidated balance sheet. Collateral is obtained based on management’s assessment of the customer’s credit risk.

The Company’s exposure to credit loss is represented by the contractual amount of these commitments. As of September 30, 2018 and December 31, 2017, the Company’s reserve for unfunded commitments totaled $40 thousand.

Fees collected on off-balance sheet financial instruments represent the fair value of those commitments and are deferred and amortized over their term.

Financial Instruments Commitments

Unfunded commitments are as follows:

	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Unfunded loan commitments	$	142,657	$	134,536
Commercial and standby letters of credit		85		91
Total	$	142,742	$	134,627

Unfunded loan commitments:

Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Company evaluates each customer’s creditworthiness on a case-by-case basis. The amount of collateral obtained, if it is deemed necessary by the Company upon extension of credit, is based upon management’s credit evaluation of the counterparty. Collateral held varies but may include accounts receivable, inventory, property, plant and equipment, and income-producing commercial properties.

Commercial and standby letters of credit:

Letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. Letters of credit are primarily issued to support trade transactions or guarantee arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. The Company generally holds collateral supporting those commitments if deemed necessary.

Other Commitments and Contingencies

Legal Proceedings

The Company, from time to time, is involved as plaintiff or defendant in various legal actions arising in the normal course of business. While the ultimate outcome of any such proceedings cannot be predicted with certainty, it is the opinion of management, based upon advice of legal counsel, that no proceedings exist, either individually or in the aggregate, which, if determined adversely to the Company, would have a material effect on the Company’s consolidated balance sheet, results of operations or cash flows.

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Fair Value Measurements

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

NOTE 12. FAIR VALUE MEASUREMENTS

When determining the fair value measurements for assets and liabilities and the related fair value hierarchy, the Company considers the principal or most advantageous market in which it would transact and the assumptions that market participants would use when pricing the asset or liability. When possible, the Company looks to active and observable markets to price identical assets or liabilities. When identical assets and liabilities are not traded in active markets, the Company looks to market observable data for similar assets and liabilities. It is the Company’s policy to maximize the use of observable inputs, minimize the use of unobservable inputs and use unobservable inputs to measure fair value to the extent that observable inputs are not available. The need to use unobservable inputs generally results from the lack of market liquidity, resulting in diminished observability of both actual trades and assumptions that would otherwise be available to value these instruments, or the value of the underlying collateral is not market observable. Although third party price indications may be available for an asset or liability, limited trading activity would make it difficult to support the observability of these quotations.

Financial Instruments Carried at Fair Value on a Recurring Basis

The following is a description of the valuation methodologies used for financial instruments measured at fair value on a recurring basis, as well as the general classification of each instrument under the valuation hierarchy.

Investment Securities—Investment securities available for sale are carried at fair value on a recurring basis. When available, fair value is based on quoted prices for the identical security in an active market and as such, would be classified as Level 1. If quoted market prices are not available, fair values are estimated using quoted prices of securities with similar characteristics, discounted cash flows or matrix pricing models. Investment securities available for sale for which Level 1 valuations are not available are classified as Level 2, and include U.S. Government agencies and sponsored enterprises obligations and agency mortgage-backed securities; state and municipal obligations; asset-backed securities; and corporate debt and other securities. Pricing of these securities is generally spread driven.

Observable inputs that may impact the valuation of these securities include benchmark yield curves, credit spreads, reported trades, dealer quotes, bids, issuer spreads, current rating, historical constant prepayment rates, historical voluntary prepayment rates, structural and waterfall features of individual securities, published collateral data, and for certain securities, historical constant default rates and default severities.

SBA Servicing Asset—The SBA Servicing Asset is carried at fair value on a recurring basis. To determine the fair value of SBA servicing rights, The Company uses market prices for comparable servicing contracts, when available, or alternatively, uses a valuation model that calculates the present value of estimated future net servicing income. In using this valuation method, the Company incorporates assumptions that market participants would use in estimating future net servicing income, which includes estimates of the cost to service, the discount rate, custodial earnings rate, an inflation rate, ancillary income, prepayment speeds, default rates, late fees and losses. The SBA Servicing Asset is classified as Level 3.

The following table presents the assets and liabilities measured at fair value on a recurring basis:

	September 30, 2018
	Level 1		Level 2		Level 3		Total
	(Dollars in thousands)
Assets:
U.S. Government agencies	$	—	$	1,906	$	—	$	1,906
Residential mortgage-backed securities		—		26,048		—		26,048
Corporate bonds and other debt securities		—		5,495		—		5,495
SBA servicing rights		—		—		3,561		3,561
Total	$	—	$	33,449	$	3,561	$	37,010

	December 31, 2017
	Level 1		Level 2		Level 3		Total
	(Dollars in thousands)
Assets:
U.S. Government agencies	$	—	$	1,949	$	—	$	1,949
Residential mortgage-backed securities		—		29,629		—		29,629
Corporate bonds and other debt securities		—		5,665		—		5,665
SBA servicing rights		—		—		3,411		3,411
Total	$	—	$	37,243	$	3,411	$	40,654

There were no transfers of financial assets between levels of the fair value hierarchy during the three or nine months ended September 30, 2018.

Financial Instruments Measured at Fair Value on a Non-Recurring Basis

The following is a description of the methodologies used to estimate the fair values of assets and liabilities measured at fair value on a non-recurring basis, and the level within the fair value hierarchy in which those measurements are typically classified.

Impaired loans and other real estate owned (“OREO”)—The carrying amount of collateral dependent impaired loans is typically based on the fair value of the underlying collateral, which may be real estate or other business assets, less estimated costs to sell. The carrying value of OREO is initially measured based on the fair value, less estimated cost to sell, of the real estate acquired in foreclosure and subsequently adjusted to the lower of cost or estimated fair value, less estimated cost to sell. Fair values of real estate collateral are typically based on real estate appraisals which utilize market and income valuation techniques incorporating both observable and unobservable inputs. When current appraisals are not available, the Company may use brokers’ price opinions, home price indices, or other available information about changes in real estate market conditions to adjust the latest appraised value available. These adjustments to appraised values may be subjective and involve significant management judgment. The fair value of collateral consisting of other business assets is generally based on appraisals that use market approaches to valuation, incorporating primarily unobservable inputs. Fair value measurements related to collateral dependent impaired loans and OREO are classified within Level 3 of the fair value hierarchy.

The following tables provide information about certain assets measured at fair value on a non-recurring basis:

	Estimated Fair Value
	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Assets (classified in Level 3):
Impaired loans	$	1,913	$	2,553
Other real estate and repossessed assets		289		21

Impairment charges resulting from the non-recurring changes in fair value of underlying collateral of impaired loans are included in the provision for loan losses in the consolidated statement of income. Impairment charges resulting from the non-recurring changes in fair value of OREO are included in other real estate and acquired assets resolution expenses in the consolidated statement of income.

The following tables show significant unobservable inputs used in the recurring and non-recurring fair value measurements of Level 3 assets:

Level 3 Asset	Fair Value		Valuation Technique	Unobservable Inputs	Range/Weighted Average
September 30, 2018
Non-recurring:
Impaired loans	$	1,913	Third party appraisals	Collateral discounts	0.0% - 100.0% (84.7%)
Other real estate owned		289	Third party appraisals	Collateral discounts and estimated cost to sell		10.0	%
Recurring:
SBA servicing assets		3,561	Discounted cash flows	Conditional prepayment rate		7.1	%
				Discount rate		14.3	%
December 31, 2017
Non-recurring:
Impaired loans	$	2,553	Third party appraisals	Collateral discounts	0.0% - 100.0% (11.6%)
Other real estate owned		21	Third party appraisals	Collateral discounts and estimated cost to sell		10.0	%
Recurring:
SBA servicing assets		3,411	Discounted cash flows	Conditional prepayment rate		6.7	%
				Discount rate		14.1	%

The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments are as follows:

September 30, 2018	Carrying Value		Fair Value		Level 1		Level 2		Level 3
	(Dollars in thousands)
Financial Assets:
Cash and cash equivalents	$	44,138	$	44,138	$	44,138	$	—	$	—
Time deposits in other banks		245		245		245		—		—
Available for sale securities		33,449		33,449		—		33,449		—
FHLB and other bank stock		4,861		4,861		—		4,861		—
Loans, net		947,918		942,987		—		—		942,987
Loans held for sale		5,500		5,880		—		5,880		—
Accrued interest receivable		3,715		3,715		—		3,715		—
Bank-owned life insurance		483		483		—		483		—
SBA servicing rights		3,561		3,561		—		—		3,561
Financial Liabilities:
Deposits	$	872,610	$	843,522	$	—	$	843,522	$	—
Accrued interest payable		475		475		—		475		—
Short-term borrowings		10,000		10,000		—		10,000		—
Long-term borrowings		64,961		63,233		—		63,233		—

December 31, 2017	Carrying Value		Fair Value		Level 1		Level 2		Level 3
	(Dollars in thousands)
Financial Assets:
Cash and cash equivalents	$	57,949	$	57,949	$	57,949	$	—	$	—
Time deposits in other banks		245		245		245		—		—
Available for sale securities		37,243		37,243		—		37,243		—
FHLB and other bank stock		4,812		4,812		—		4,812		—
Loans, net		863,467		870,749		—		—		870,749
Loans held for sale		3,814		4,188		—		4,188		—
Accrued interest receivable		3,466		3,466		—		3,466		—
Bank-owned life insurance		479		479		—		479		—
SBA servicing rights		3,411		3,411		—		—		3,411
Financial Liabilities:
Deposits	$	835,368	$	840,645	$	—	$	840,645	$	—
Accrued interest payable		407		407		—		407		—
Short-term borrowings		15,000		15,000		—		15,000		—
Long-term borrowings		76,411		67,310		—		67,310		—

Certain financial instruments are carried at amounts that approximate fair value due to their short-term nature and generally negligible credit risk. Financial instruments for which fair value approximates the carrying amount at September 30, 2018 and December 31, 2017, include cash and cash equivalents, time deposits in other banks and accrued interest receivable and payable.

The following methods and assumptions were used to estimate the fair value of each class of financial instruments.

FHLB and Other Bank Stock:

FHLB and other bank stock can be liquidated only by redemption by the issuer, as there is no market for these securities. These securities are carried at par, which has historically represented the redemption price and is therefore considered to approximate fair value.

Loans:

Fair values for loans are based on a discounted cash flow methodology that considers various factors, including the type of loan and related collateral, classification status, fixed or variable interest rate, term of loan, whether or not the loan was amortizing and current discount rates. A basis point adjustment for the liquidity premium curve was added to the discounted cash flow methodology to obtain the estimated exit price of the portfolio.  Loans are grouped together according to similar characteristics and are treated in the aggregate when applying various valuation techniques. The discount rates used for loans are based on current market rates for new originations of comparable credit risk and include adjustments for liquidity concerns. The allowance for loan and lease losses is considered a reasonable estimate of the required adjustment to fair value to reflect the impact of credit risk. This estimate is intended to represent an exit value as defined in ASC 820.

Loans Held for Sale:

SBA loans held for sale are carried at the lower of cost or fair value. The fair values of SBA loans held for sale is determined, when possible, using quoted secondary-market prices and are classified within Level 2 of the fair value hierarchy. If no such quoted prices exist, the fair value of a loan is determined using quoted prices for a similar loan or loans, adjusted for the specific attributes of that loan.  

Bank-owned Life Insurance:

The Company holds life insurance policies on certain officers. The carrying value of these policies approximates fair value as it is based on the cash surrender value adjusted for other charges or amounts due that are probable at settlement.

Deposits:

The fair value of demand deposits, savings accounts and money market deposits is the amount payable on demand at the reporting date. The fair value of fixed-maturity certificates of deposit is estimated using discounted cash flow analysis and using the rates currently offered for deposits of similar remaining maturities.

Short-term and Long-term Borrowings:

The fair value of advances from the FHLB and other borrowings are estimated by discounting the future cash flows using the current rate at which similar borrowings with similar remaining maturities could be obtained.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Nature of Operations

Nature of Operations

Spirit of Texas Bancshares, Inc. (the “Holding Company” or “Company”) is a bank holding company headquartered in Conroe, Texas that provides, through its bank subsidiary, a variety of financial services to individuals and corporate customers in Texas, which are primarily agricultural, light industrial and commercial areas.

On March 16, 2017, the Company filed a Second Amended and Restated Certificate of Formation with the Texas Secretary of State to affect a reverse stock split of its outstanding common stock which became effective on March 16, 2017. As a result of the reverse stock split, every two shares of the Company’s issued and outstanding common stock were consolidated into one issued and outstanding share of common stock. The computations of all share and per share amounts in this Quarterly Report on Form 10-Q (this “Form 10-Q”) have been adjusted retroactively to reflect the reverse stock split.

The Company consummated the underwritten initial public offering of its common stock in May 2018. In connection with the initial public offering, the Company issued and sold 2,300,000 shares of its common stock, including 300,000 shares of common stock sold pursuant to the underwriters’ full exercise of their option to purchase additional shares, at an offering price of $21.00 per share, for aggregate gross proceeds of $48.3 million before deducting underwriting discounts and offering expenses, and aggregate net proceeds of $42.1 million after deducting underwriting discounts and offering expenses.

Basis of Presentation

Basis of Presentation

The consolidated financial statements include the accounts of the Holding Company and the accounts of its wholly-owned subsidiary, Spirit of Texas Bank SSB (the “Bank”).  All significant intercompany balances and transactions have been eliminated in consolidation.  

The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and Article 8 of Regulation S-X.  Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. Operating results for the period ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018 and should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2017 included in our prospectus filed with the Securities and Exchange Commission (“SEC”) pursuant to Rule 424(b) of the Securities Act of 1933, as amended, on May 4, 2018, related to our initial public offering.

In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for the fair presentation of these consolidated financial statements have been included.  The preparation of financial statements in conformity with these accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and income and expense during the reporting periods and the related disclosures.  Although management’s estimates and assumptions are based on current expectations, estimates, forecasts and projections about future performance of the Company, such estimates and assumptions are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult for the Company to assess. 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.

Accounting Policies Recently Adopted and Pending Accounting Pronouncements

Accounting Policies Recently Adopted and Pending Accounting Pronouncements

Accounting Standards Update (ASU) 2018-15, “Intangibles – Goodwill and Other – Internal Use Software – Issued in August 2018, ASU No. 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software.  The amendments of ASU 2018-15 are effective for public entities for interim and annual periods beginning after December 15, 2019 and for other entities for periods beginning after December 15, 2020.  Management will early adopt ASU 2018-15 as of January 1, 2019 as early adoption is permitted and is currently evaluating the impact the ASU will have on the consolidated financial statements.

ASU 2018-13, “Fair Value Measurement Disclosure Framework” – Issued in August 2018, ASU No. 2018-13 modifies the disclosure requirements on fair value measurements outlined in Topic 820, Fair Value Measurements.  Specifically the amendments in the ASU remove the requirements to disclose the amount and reasons for transfers between fair value hierarchy levels, the policy for timing of transfers between levels, the valuation processes for Level 3 fair value measurements, and for nonpublic entities, disclosure of the changes in unrealized gains and losses for the period included in earnings for recurring Level 3 fair value measurements.  Additionally, the ASU adds disclosure requirements regarding changes in unrealized gains and losses for the period included in other comprehensive income related to Level 3 fair value measurements, and disclosure of the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements.  The amendments of ASU 2018-13 are effective for all entities for interim and annual periods beginning after December 15, 2019.  Management will adopt the provisions of this ASU removing fair value disclosure requirements as of December 31, 2018 as early adoption of the removal provisions is allowed and will adopt the remaining provisions of the ASU as of the effective date.

ASU 2018-09, “Codification Improvements.”  Issued in July 2018, ASU No. 2018-09 makes changes to a variety of topics to clarify, correct errors in, or make minor improvements to the Accounting Standards Codification. The majority of the amendments in ASU 2018-09 will be effective in annual periods beginning after December 15, 2018. Management is currently evaluating the effects the adoption of ASU 2018-09 will have on the consolidated financial statements, results of operations and cash flows.

ASU 2018-07, “Compensation-Stock Compensation.” Issued in June 2018, ASU 2018-07 expands the scope of ASC 718 to include share-based payment transactions for acquiring goods and services from nonemployees.  The amendments also clarify that ASC 718 does not apply to share-based payments used to provide either financing to the issuer or awards granted in conjunction with selling goods or services to customers under a contract subject to ASC 606, Revenue from Contracts with Customers.  The amendments of ASU 2018-07 are effective for public entities for interim and annual periods beginning after December 15, 2018 and for other entities for periods beginning after December 15, 2019.  Management will adopt ASU 2018-07 using the public company effective date as early adoption is permitted and is currently evaluating the impact the ASU will have on the consolidated financial statements.

ASU 2017-08, “Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities.”  Issued in March 2017, ASU 2017-08 amends the amortization period for certain purchased callable debt securities held at a premium.  In particular, the amendments in ASU 2017-08 require the premium to be amortized to the earliest call date. The amendments do not, however, require an accounting change for securities held at a discount; instead, the discount continues to be amortized to maturity.  Notably, the amendments in this ASU more closely align the amortization period of premiums and discounts to expectations incorporated in market pricing on the underlying securities.  Securities within the scope of ASU 2017-08 are purchased debt securities that have explicit, non-contingent call features that are callable at fixed prices and on preset dates.  The amendments of ASU 2017-08 become effective for public entities for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018 and for other entities for periods beginning after December 15, 2019.    Management will adopt this ASU using the public company effective date as early adoption is permitted and is currently evaluating the impact this ASU will have on the consolidated financial statements; however, the adoption of ASU 2017-08 is not expected to have a material impact on the Company’s consolidated financial statements.

ASU 2017-04, “Intangibles-Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.”  Issued in January 2017, ASU 2017-04 simplifies the manner in which an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test.  Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill.  In computing the implied fair value of goodwill under Step 2, an entity, prior to the amendments in ASU 2017-04, had to perform procedures to determine the fair value at the impairment testing date of its assets and liabilities, including unrecognized assets and liabilities, in accordance with the procedure that would be required in determining the fair value of assets acquired and liabilities assumed in a business combination.  However, under the amendments in ASU 2017-04, an entity should (1) perform its annual or interim goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and (2) recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value, with the understanding that the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit.  Additionally, ASU 2017-04 removes the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails such qualitative test, to perform Step 2 of the goodwill impairment test.  ASU 2017-04 is effective prospectively for public entities for annual, or any interim, goodwill impairment tests in fiscal years beginning after December 15, 2019 and for all other entities for impairment tests in fiscal years beginning after December 15, 2021.  Management will adopt this ASU using the public company effective date as early adoption is permitted and will continue to evaluate the impact this ASU will have on the consolidated financial statements through its effective date; however, the adoption of ASU 2017-04 is not expected to have a material impact on the Company’s consolidated financial statements.  

ASU 2017-01, “Business Combinations (Topic 805) - Clarifying the Definition of a Business.” Issued in January 2017, ASU 2017-01 clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses, which determines whether goodwill should be recorded or not. The amendments in ASU No. 2017-01 provide a screen to determine when a set of assets and activities (collectively, a “set”) is not a business. The screen requires that when substantially all of the fair value of the gross assets acquired (or disposed of) is concentrated in a single identifiable asset or a group of similar identifiable assets, the set is not a business. This screen reduces the number of transactions that need to be further evaluated.  If, however, the screen is not met, then the amendments in ASU 2017-01 require that to be considered a business, a set must include, at a minimum, an input and a substantive process that together significantly contribute to the ability to create output and remove the evaluation of whether a market participant could replace missing elements.  The revised definition will result in more transactions being recorded as asset acquisitions or dispositions as opposed to business acquisitions or dispositions.  The amendments of ASU 2017-01 are effective for public business entities for fiscal years beginning after December 15, 2017, and for private companies for fiscal years beginning after December 15, 2018.  Management has elected to adopt this ASU using the private company effective date and is currently evaluating the impact this ASU will have on the consolidated financial statements; however, the adoption of ASU 2017-01 is not expected to have a material impact on the Company’s consolidated financial statements.  

In October 2016, the FASB issued ASU No. 2016-16, "Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory." The objective of issuing this ASU is to improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Current GAAP prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in GAAP. As such, the Board decided that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, the amendments in this guidance eliminate the exception for an intra-entity transfer of an asset other than inventory. The amendments of this ASU are effective for public business entities for fiscal years beginning after December 15, 2017, and for private companies for fiscal years beginning after December 15, 2018.  Early adoption is permitted for all entities as of the beginning of an annual reporting period for which financial statements (interim or annual) have not been issued or made available for issuance. That is, earlier adoption should be in the first interim period if an entity issues interim financial statements. Management has elected to adopt this ASU using the private company effective date and is currently evaluating this guidance to determine the impact on its consolidated financial position, results of operations or cash flows.

ASU 2016-13, “Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.”  Issued in June 2016, ASU 2016-13 will add FASB ASC Topic 326, “Financial Instruments-Credit Losses” and finalizes amendments to FASB ASC Subtopic 825-15, “Financial Instruments-Credit Losses.”  The amendments of ASU 2016-13 are intended to provide financial statement users with more decision-useful information related to expected credit losses on financial instruments and other commitments to extend credit by replacing the current incurred loss impairment methodology with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to determine credit loss estimates.  The amendments of ASU 2016-13 eliminate the probable initial recognition threshold and, in turn, reflect an entity’s current estimate of all expected credit losses.  ASU 2016-13 does not specify the method for measuring expected credit losses, and an entity is allowed to apply methods that reasonably reflect its expectations of the credit loss estimate.  Additionally, the amendments of ASU 2016-13 require that credit losses on available for sale debt securities be presented as an allowance rather than as a write-down.  The amendments of ASU 2016-13 are effective for public entities for interim and annual periods beginning after December 15, 2019 and for all other entities for periods beginning after December 15, 2020.  Earlier application is permitted for interim and annual periods beginning after December 15, 2018.  Management has elected to adopt this ASU using the private company effective date and is currently evaluating the impact this ASU will have on the consolidated financial statements and that evaluation will depend on economic conditions and the composition of the Company’s loan and lease portfolio at the time of adoption.

ASU 2016-02, “Leases (Topic 842).” Issued in February 2016, ASU 2016-02 was issued by the FASB to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and by disclosing key information about leasing arrangements.  ASU 2016-02 will, among other things, require lessees to recognize a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 does not significantly change lease accounting requirements applicable to lessors; however, the ASU contains some targeted improvements that are intended to align, where necessary, lessor accounting with the lessee accounting model and with the updated revenue recognition guidance issued in 2014.  The amendments of ASU 2016-02 are effective for public entities for interim and annual periods beginning after December 15, 2018 and for other entities for periods beginning after December 15, 2019.  The adoption of this ASU will result in an increase to the Consolidated Balance Sheets for right-of-use assets and associated lease liabilities for operating leases in which the Company is the lessee.  Under current accounting standards, all of the Company's leases are classified as operating leases and, as such, are not recognized on the Company's Consolidated Balance Sheet. Additionally, in July 2018, the FASB issued ASU No. 2018-10, Codification Improvements to Topic 842, Leases and ASU No. 2018-11, Leases, Targeted Improvements. The amendments in these updates provide additional clarification and implementation guidance on certain aspects of ASU 2016-02 and have the same effective and transition requirements as ASU 2016-02. Specifically, ASU 2018-11 creates an additional transition method option allowing entities to record a cumulative effect adjustment to opening retained earnings in the year of adoption.  Management will adopt these ASU’s using the public company effective date as early adoption is permitted and is currently evaluating the impact to the consolidated financial statements and related method of adoption, specifically, we are in the process of reviewing service contracts to determine if right-of-use assets exist.

ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” Issued in May 2014, ASU 2014-09 will add FASB ASC Topic 606, “Revenue from Contracts with Customers,” and will supersede revenue recognition requirements in FASB ASC Topic 605, “Revenue Recognition,” as well as certain cost guidance in FASB ASC Topic 605-35, “Revenue Recognition – Construction-Type and Production-Type Contracts.” ASU 2014-09 provides a framework for revenue recognition that replaces the existing industry and transaction specific requirements under the existing standards.  ASU 2014-09 requires an entity to apply a five-step model to determine when to recognize revenue and at what amount.  The model specifies that revenue should be recognized when (or as) an entity transfers control of goods or services to a customer at the amount in which the entity expects to be entitled.  Depending on whether certain criteria are met, revenue should be recognized either over time, in a manner that depicts the entity’s performance, or at a point in time, when control of the goods or services are transferred to the customer.  ASU 2014-09 provides that an entity should apply the following steps: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when, or as, the entity satisfies a performance obligation.  In addition, the existing requirements for the recognition of a gain or loss on the transfer of non-financial assets that are not in a contract with a customer are amended to be consistent with the guidance on recognition and measurement in ASU 2014-09.  The amendments of ASU 2014-09 may be applied either retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying ASU 2014-09 recognized at the date of initial application.  If the transition method of application is elected, the entity should also provide the additional disclosures in reporting periods that include the date of initial application of (1) the amount by which each financial statement line item is affected in the current reporting period, as compared to the guidance that was in effect before the change, and (2) an explanation of the reasons for significant changes.  ASU 2015-14, “Revenue from Contracts with Customers (Topic 606)-Deferral of the Effective Date,” issued in August 2015, defers the effective date of ASU 2014-09 by one year.  ASU 2015-14 provides that the amendments of ASU 2014-09 become effective for public business entities for fiscal years beginning after December 15, 2017, and for private companies for fiscal years beginning after December 15, 2018.  All subsequently issued ASU’s which provide additional guidance and clarifications to various aspects of FASB ASC Topic 606 will become effective when the amendments of ASU 2014-09 become effective.  These subsequently issued ASU’s include ASU 2016-08 “Revenue from Contracts with Customers (Topic 606)-Principal versus Agent Considerations,” ASU 2016-10 “Revenue from Contracts with Customers (Topic 606)-Identifying Performance Obligations and Licensing,” and ASU 2016-12 “Revenue from Contracts with Customers (Topic 606)-Narrow Scope Improvements and Practical Expedients.”  These amendments clarify the main provisions of ASU-2014-09 with respect to specific revenue types based upon implementation questions submitted.  Specifically, revenue in which a third party satisfies a portion of the performance obligations, revenue from licensing activities, and the assessment of collectability, treatment of sales taxes, non-cash consideration, and contract modifications at transition.  Management has elected to adopt this ASU using the private company effective date and has completed an analysis to determine which revenue streams are within the scope of ASU 2014-09 and the associated impact on those revenue streams.  Management has determined that approximately 5% of the revenues earned by the Company are within the scope of ASU 2014-09, and, for most of the revenue streams within the scope of ASU 2014-09, the amendments do not change the timing or amount of revenue recognized.  Management will adopt this ASU using the modified retrospective method of application and does not anticipate recording a cumulative adjustment for prior periods presented.

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2018

Investments Debt And Equity Securities [Abstract]

Schedule of Fair Values of Securities Available for Sale

The amortized cost, gross unrealized gains and losses and approximate fair values of securities available for sale are as follows:

	Amortized		Unrealized				Fair
September 30, 2018	Cost		Gains		Losses		Value
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	2,014	$	—	$	108	$	1,906
Residential mortgage-backed securities		27,197		—		1,149		26,048
Corporate bonds and other debt securities		5,678		—		183		5,495
Total available for sale	$	34,889	$	—	$	1,440	$	33,449

	Amortized		Unrealized				Fair
December 31, 2017	Cost		Gains		Losses		Value
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	2,010	$	—	$	61	$	1,949
Residential mortgage-backed securities		30,156		—		527		29,629
Corporate bonds and other debt securities		5,711		—		46		5,665
Total available for sale	$	37,877	$	—	$	634	$	37,243

Schedule of Securities Available for Sale by Contractual Maturity

The amortized cost and estimated fair value of securities available for sale, by contractual maturity, are as follows:

	Amortized		Fair
September 30, 2018	Cost		Value
	(Dollars in thousands)
Available for sale:
Due in one year or less	$	—	$	—
Due after one year through five years		4,117		3,998
Due after five years through ten years		3,098		2,954
Due after ten years		477		449
Residential mortgage-backed securities		27,197		26,048
Total available for sale	$	34,889	$	33,449

Schedule of Investment Securities Available for Sale and Aggregated by Investment Category and Length of Time Individual Securities in Continuous Unrealized Loss Position

The following tables present the estimated fair values and gross unrealized losses on investment securities available for sale, aggregated by investment category and length of time individual securities have been in a continuous unrealized loss position as of the periods presented:

	Less than 12 Months				12 Months or More				Total
September 30, 2018	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	—	$	—	$	1,906	$	108	$	1,906	$	108
Residential mortgage-backed securities		1,121		63		24,925		1,086		26,046		1,149
Corporate bonds and other debt securities		2,551		81		2,944		102		5,495		183
Total available for sale	$	3,672	$	144	$	29,775	$	1,296	$	33,447	$	1,440

	Less than 12 Months				12 Months or More				Total
December 31, 2017	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
	(Dollars in thousands)
Available for sale:
U.S. Government agencies	$	1,949	$	61	$	—	$	—	$	1,949	$	61
Residential mortgage-backed securities		29,627		527		—		—		29,627		527
Corporate bonds and other debt securities		5,665		46		—		—		5,665		46
Total available for sale	$	37,241	$	634	$	—	$	—	$	37,241	$	634

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Loans, Net (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Summary of Loans

Loans consisted of the following at September 30, 2018 and December 31, 2017:

	September 30, 2018			December 31, 2017
	(Dollars in thousands)
Commercial and industrial loans (1)	$	159,776		$	135,040
Real estate:
1-4 single family residential loans		244,633			232,510
Construction, land and development		155,778			139,470
Commercial real estate loans (including multifamily)		324,212			285,731
Consumer loans and leases		18,174			22,736
Municipal and other loans		51,501			53,632
Total loans held in portfolio (2)	$	954,074		$	869,119
Allowance for loan losses		(6,156	)		(5,652	)
Loans held in portfolio, net	$	947,918		$	863,467

(1) Balance includes $75.9 million and $67.1 million of the unguaranteed portion of SBA loans as of September 30, 2018 and December 31, 2017, respectively.

(2) Balance includes $(3.6) million and $(3.4) million of deferred fees, cost, premium and discount as of September 30, 2018 and December 31, 2017, respectively.

Summary of Loans to Related Parties and Principal Owners

In the ordinary course of business, the Company makes loans to executive officers and directors. Loans to these related parties, including companies in which they are principal owners, are as follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
	(Dollars in thousands)
Principal outstanding, beginning of year	$	421		$	516		$	463		$	9,036
Additions (reductions) of affiliations		—			—			—			(8,425	)
New loans made in current year		—			—			—			—
Repayments (1)		(19	)		(26	)		(61	)		(121	)
Principal outstanding, end of year	$	402		$	490		$	402		$	490

(1) During the three months ended June 30, 2017 there was a reclassification of repayments to reductions of affiliations.

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Allowance for Loan and Lease Losses (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Allowance for Loan and Lease Losses

The following tables present information related to allowance for loan and lease losses for the periods presented:

	Allowance Rollforward
Three Months Ended September 30, 2018	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	4,886	$	(275	)	$	4	$	76		$	4,691
Real estate:
1-4 single family residential loans		318		—			—		(216	)		102
Construction, land and development loans		195		—			—		256			451
Commercial real estate loans (including multifamily)		233		—			—		495			728
Consumer loans and leases		346		(74	)		—		(90	)		182
Municipal and other loans		37		—			—		(35	)		2
Ending allowance balance	$	6,015	$	(349	)	$	4	$	486		$	6,156

	Allowance Rollforward
Three Months Ended September 30, 2017	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	2,582	$	(15	)	$	—	$	20		$	2,587
Real estate:
1-4 single family residential loans		732		—			—		201			933
Construction, land and development loans		412		—			—		103			515
Commercial real estate loans (including multifamily)		800		—			—		255			1,055
Consumer loans and leases		204		(16	)		—		(15	)		173
Municipal and other loans		161		—			—		40			201
Ending allowance balance	$	4,891	$	(31	)	$	—	$	604		$	5,464

	Allowance Rollforward
Nine Months Ended September 30, 2018	Beginning Balance		Charge-offs			Recoveries		Provision			Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	3,046	$	(920	)	$	73	$	2,492		$	4,691
Real estate:
1-4 single family residential loans		902		(5	)		—		(795	)		102
Construction, land and development loans		441		—			—		10			451
Commercial real estate loans (including multifamily)		898		—			—		(170	)		728
Consumer loans and leases		198		(104	)		—		88			182
Municipal and other loans		167		—			—		(165	)		2
Ending allowance balance	$	5,652	$	(1,029	)	$	73	$	1,460		$	6,156

	Allowance Rollforward
Nine Months Ended September 30, 2017	Beginning Balance		Charge-offs			Recoveries		Provision		Ending Balance
	(Dollars in thousands)
Commercial and industrial loans	$	2,347	$	(555	)	$	2	$	793	$	2,587
Real estate:
1-4 single family residential loans		647		—			—		286		933
Construction, land and development loans		364		—			—		151		515
Commercial real estate loans (including multifamily)		667		(15	)		—		403		1,055
Consumer loans and leases		186		(129	)		—		116		173
Municipal and other loans		146		—			—		55		201
Ending allowance balance	$	4,357	$	(699	)	$	2	$	1,804	$	5,464

Summary of Aging Analysis of Recorded Investment for Delinquent Loans by Portfolio and Segment

The following tables present an aging analysis of the recorded investment for delinquent loans by portfolio and segment:

	Accruing
September 30, 2018	Current		30 to 59 Days Past Due		60 to 89 Days Past Due		90 Days or More Past Due		Non- Accrual		Total
	(Dollars in thousands)
Commercial and industrial loans	$	155,996	$	1,246	$	113	$	—	$	2,421	$	159,776
Real estate:
1-4 single family residential loans		242,606		776		—		426		825		244,633
Construction, land and development		155,767		11		—		—		—		155,778
Commercial real estate loans (including multifamily)		324,212		—		—		—		—		324,212
Consumer loans and leases		18,051		37		14		—		72		18,174
Municipal and other loans		51,501		—		—		—		—		51,501
Total loans	$	948,133	$	2,070	$	127	$	426	$	3,318	$	954,074

	Accruing
December 31, 2017	Current		30 to 59 Days Past Due		60 to 89 Days Past Due		90 Days or More Past Due		Non- Accrual		Total
	(Dollars in thousands)
Commercial and industrial loans	$	132,775	$	302	$	3	$	33	$	1,927	$	135,040
Real estate:
1-4 single family residential loans		230,738		637		—		—		1,135		232,510
Construction, land and development		139,470		—		—		—		—		139,470
Commercial real estate loans (including multifamily)		284,869		415		—		—		447		285,731
Consumer loans and leases		22,538		98		47		—		53		22,736
Municipal and other loans		53,632		—		—		—		—		53,632
Total loans	$	864,022	$	1,452	$	50	$	33	$	3,562	$	869,119

Summary of Loans by Key Indicators of Credit Quality

The following table summarizes the Company’s loans by key indicators of credit quality:

September 30, 2018	Pass		Special Mention		Substandard		Doubtful
	(Dollars in thousands)
Commercial and industrial loans	$	151,088	$	2,904	$	5,597	$	187
Real estate:
1-4 single family residential loans		240,081		—		4,552		—
Construction, land and development		154,305		315		1,158		—
Commercial real estate loans (including multifamily)		312,574		9,786		1,852		—
Consumer loans and leases		18,046		—		128		—
Municipal and other loans		51,501		—		—		—
Total loans	$	927,595	$	13,005	$	13,287	$	187

December 31, 2017	Pass		Special Mention		Substandard		Doubtful
	(Dollars in thousands)
Commercial and industrial loans	$	129,288	$	2,331	$	3,421	$	—
Real estate:
1-4 single family residential loans		228,450		1,090		2,970		—
Construction, land and development		137,760		1,403		307		—
Commercial real estate loans (including multifamily)		276,096		5,877		3,758		—
Consumer loans and leases		22,528		—		208		—
Municipal and other loans		53,632		—		—		—
Total loans	$	847,754	$	10,701	$	10,664	$	—

Summary of Investment in Loans Disaggregated Based on Method of Evaluating Impairment

The following table shows the Company’s investment in loans disaggregated based on the method of evaluating impairment:

	Loans - Recorded Investment				Allowance for Credit Loss
September 30, 2018	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
	(Dollars in thousands)
Commercial and industrial loans	$	2,494	$	157,282	$	1,085	$	3,606
Real estate:
1-4 single family residential loans		970		243,663		—		102
Construction, land and development		—		155,778		—		451
Commercial real estate loans (including multifamily)		—		324,212		—		728
Consumer loans and leases		72		18,102		24		158
Municipal and other loans		—		51,501		—		2
Total loans	$	3,536	$	950,538	$	1,109	$	5,047

	Loans - Recorded Investment				Allowance for Credit Loss
December 31, 2017	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Individually Evaluated for Impairment		Collectively Evaluated for Impairment
	(Dollars in thousands)
Commercial and industrial loans	$	2,194	$	132,846	$	1,226	$	1,820
Real estate:
1-4 single family residential loans		1,292		231,218		119		783
Construction, land and development		—		139,470		—		441
Commercial real estate loans (including multifamily)		447		285,284		—		898
Consumer loans and leases		53		22,683		16		182
Municipal and other loans		—		53,632		—		167
Total loans	$	3,986	$	865,133	$	1,361	$	4,291

Summary of Information Regarding Impaired Loans Evaluated for Specific Reserves

The following tables set forth certain information regarding the Company’s impaired loans that were evaluated for specific reserves:

	Impaired Loans - With Allowance						Impaired Loans - With no Allowance
September 30, 2018	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance
	(Dollars in thousands)
Commercial and industrial loans	$	1,784	$	6,159	$	1,085	$	710	$	1,514
Real estate:
1-4 single family residential loans		—		—		—		970		1,000
Construction, land and development		—		—		—		—		—
Commercial real estate loans (including multifamily)		—		—		—		—		—
Consumer loans and leases		54		55		24		18		18
Municipal and other loans		—		—		—		—		—
Total loans	$	1,838	$	6,214	$	1,109	$	1,698	$	2,532

	Impaired Loans - With Allowance						Impaired Loans - With no Allowance
December 31, 2017	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance
	(Dollars in thousands)
Commercial and industrial loans	$	1,811	$	1,850	$	1,226	$	383	$	386
Real estate:
1-4 single family residential loans		119		119		119		1,173		1,174
Construction, land and development		—		—		—		—		—
Commercial real estate loans (including multifamily)		—		—		—		447		447
Consumer loans and leases		53		52		16		—		—
Municipal and other loans		—		—		—		—		—
Total loans	$	1,983	$	2,021	$	1,361	$	2,003	$	2,007

	Three Months Ended September 30,
	2018				2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(Dollars in thousands)
Commercial and industrial loans	$	2,571	$	—	$	2,220	$	—
Real estate:
1-4 single family residential loans		975		—		750		—
Construction, land and development		—		—		312		—
Commercial real estate loans (including multifamily)		—		—		1,997		—
Consumer loans and leases		72		—		55		—
Municipal and other loans		—		—		—		—
Total loans	$	3,618	$	—	$	5,334	$	—

	Nine Months Ended September 30,
	2018				2017
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(Dollars in thousands)
Commercial and industrial loans	$	2,774	$	—	$	2,363	$	—
Real estate:
1-4 single family residential loans		990		—		756		—
Construction, land and development		—		—		316		—
Commercial real estate loans (including multifamily)		—		—		1,983		—
Consumer loans and leases		76		—		56		—
Municipal and other loans		—		—		—		—
Total loans	$	3,840	$	—	$	5,474	$	—

Summary of Troubled Debt Restructurings (TDRs) Based Upon Delinquency Status

The following table provides a summary of troubled debt restructurings (“TDRs”) based upon delinquency status, all of which are considered impaired:

	September 30, 2018				December 31, 2017
	Number of contracts		Recorded Investment		Number of contracts		Recorded Investment
	(Dollars in thousands)
Performing TDRs:
Commercial and industrial loans		4	$	73		5	$	270
Real estate:
1-4 single family residential loans		2		145		—		—
Construction, land and development		—		—		—		—
Commercial real estate loans (including multifamily)		—		—		—		—
Consumer loans and leases		—		—		—		—
Municipal and other loans		—		—		—		—
Total performing TDRs		6		218		5		270
Nonperforming TDRs		5		470		10		651
Total TDRs		11	$	688		15	$	921
Allowance attributable to TDRs			$	113			$	411

Summary of TDRs Includes Newly Designated TDRs and Modifications to Existing TDRs

The following table summarizes TDRs and includes newly designated TDRs as well as modifications made to existing TDRs. Modifications may include, but are not limited to, granting a material extension of time, entering into a forbearance agreement, adjusting the interest rate, accepting interest only payments for an extended period of time, a change in the amortization period or a combination of any of these. Post-modification balances represent the recorded investment at the end of Day 2 in which the modification was made:

	Three Months Ended September 30,
	2018								2017
	Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance		Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance
	(Dollars in thousands)
Commercial and industrial loans		—	$	—	$	—	$	—		2	$	38	$	38	$	—
Real estate:
1-4 single family residential loans		—		—		—		—		—		—		—		—
Construction, land and development		—		—		—		—		—		—		—		—
Commercial real estate loans (including    multifamily)		—		—		—		—		—		—		—		—
Consumer loans and leases		—		—		—		—		—		—		—		—
Municipal and other loans		—		—		—		—		—		—		—		—

	Nine Months Ended September 30,
	2018								2017
	Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance		Number of Contracts		Pre- Modification Outstanding Recorded Investment		Post- Modification Outstanding Recorded Investment		Related Allowance
	(Dollars in thousands)
Commercial and industrial loans		7	$	442	$	442	$	113		10	$	465	$	465	$	126
Real estate:
1-4 single family residential loans		1		34		34		—		—		—		—		—
Construction, land and development		—		—		—		—		—		—		—		—
Commercial real estate loans (including    multifamily)		—		—		—		—		—		—		—		—
Consumer loans and leases		—		—		—		—		—		—		—		—
Municipal and other loans		—		—		—		—		—		—		—		—

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Goodwill and Intangibles (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Goodwill and Other Intangible Assets

Goodwill and other intangible assets, which consist of core deposit intangibles, are summarized as follows:

	September 30, 2018			December 31, 2017
	(Dollars in thousands)
Goodwill	$	4,485		$	4,485
Core deposit intangible		7,179			7,179
Total		11,664			11,664
Less: Accumulated amortization		(4,220	)		(3,693	)
Total, net	$	7,444		$	7,971

Schedule of Estimated Amortization Expense for Intangible Assets

The estimated amount of amortization expense for core deposit intangible assets to be recognized over the next five fiscal years is as follows:

Type of intangibles	Remainder of 2018		2019		2020		2021		2022		2023
	(Dollars in thousands)
Core deposit intangible	$	176	$	703	$	703	$	607	$	371	$	239

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SBA Servicing Asset (Tables)

9 Months Ended

Sep. 30, 2018

Transfers And Servicing Of Financial Assets [Abstract]

Summary of Activity Pertaining to SBA Servicing Rights

The following summarizes the activity pertaining to SBA servicing rights, which are in the consolidated balance sheets, for the three and nine months ended September 30, 2018 and 2017:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2018			2017			2018			2017
	(Dollars in thousands)
Beginning balance	$	3,521		$	3,515		$	3,411		$	3,132
Origination of servicing assets		376			367			955			1,132
Change in fair value:
Due to run-off		(254	)		(216	)		(707	)		(600	)
Due to market changes		(82	)		(172	)		(98	)		(170	)
Ending balance	$	3,561		$	3,494		$	3,561		$	3,494

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Deposits (Tables)

9 Months Ended

Sep. 30, 2018

Banking And Thrift [Abstract]

Summary of Deposits by Category

The following table sets forth the Company’s deposits by category:

	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Noninterest-bearing demand deposits	$	207,727	$	176,726
Interest-bearing NOW accounts		7,865		7,318
Savings and money market accounts		214,380		243,173
Time deposits		442,638		408,151
Total deposits	$	872,610	$	835,368
Time deposits $100,000 and greater	$	346,844	$	314,102
Time deposits $250,000 and greater		90,056		82,816
Related party deposits (executive officers and directors)		12,983		13,914

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Stock-Based Compensation and Other Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2018

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Assumptions Used to Calculated Fair Value Utilizing Black-Scholes Pricing Model

The fair values of the stock options granted for the nine months ended September 30, 2018 were determined utilizing the Black-Scholes pricing model methodology. A summary of assumptions used to calculate the fair values of the 2017 Stock Plan awards is presented below:

	2017 Stock Plan
	Nine Months Ended
	September 30, 2018
Expected volatility		23	%
Expected dividend yield		0.0	%
Expected term (years)	7.5
Risk-free interest rate	2.36 - 2.87%
Weighted average grant date fair value	$	6.77

2008 Warrants

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Warrant Activity

Activity for the Spirit of Texas Bancshares, Inc. 2008 Warrants for the period indicated is summarized as follows:

	Spirit of Texas Bancshares, Inc. 2008 Warrants
	Warrants			Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		105,000		$	10.00
Granted		—
Exercised		(45,000	)	$	10.00	$	522
Forfeited (1)		—
Expired		—
Outstanding at September 30, 2018		60,000		$	10.00	$	695		0.13
Exercisable at September 30, 2018		60,000		$	10.00	$	695		0.13
Vested at September 30, 2018		60,000		$	10.00	$	695		0.13

Bank4Texas Warrants

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Warrant Activity

Activity for the Bank4Texas Warrants for the period indicated is summarized as follows:

	Bank4Texas Warrants
	Warrants			Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		12,072		$	10.50
Granted		—
Exercised		(1,362	)	$	10.50	$	15
Forfeited (1)		—
Expired		—
Outstanding at September 30, 2018		10,710		$	10.50	$	119		1.90
Exercisable at September 30, 2018		10,710		$	10.50	$	119		1.90
Vested at September 30, 2018		10,710		$	10.50	$	119		1.90

2008 Stock Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Option Activity

Option activity for the period indicated is summarized as follows:

	2008 Stock Plan
	Options			Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		1,415,350		$	12.59
Granted		—
Exercised		(192,928	)	$	10.63	$	2,114
Forfeited (1)		(18,750	)	$	13.33	$	155
Expired		—
Outstanding at September 30, 2018		1,203,672		$	12.89	$	10,472		4.92
Exercisable at September 30, 2018		990,457		$	12.58	$	8,924		4.47
Vested at September 30, 2018		990,457		$	12.58	$	8,924		4.47

(1) Forfeitures are accounted for in the period they occur.

2017 Stock Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Summary of Option Activity

Option activity for the period indicated is summarized as follows:

	2017 Stock Plan
	Options		Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)		Weighted Average Remaining Contractual Life (Years)
Outstanding at January 1, 2018		127,927	$	15.00
Granted		83,340		20.69	$	75
Exercised		—
Forfeited (1)		—
Expired		—
Outstanding at September 30, 2018		211,267	$	17.25	$	917		8.89
Exercisable at September 30, 2018		77,335	$	15.00	$	510		8.41
Vested at September 30, 2018		77,335	$	15.00	$	510		8.41

(1) Forfeitures are accounted for in the period they occur.

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Basic and Diluted Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted EPS

The following table presents the computation of basic and diluted EPS:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
	(Dollars in thousands, except per share data)
Net income as reported	$	2,771	$	2,002	$	7,465	$	4,230
Less: Participated securities share of undistributed earnings		—		—		—		27
Net income available to common stockholders	$	2,771	$	2,002	$	7,465	$	4,203
Weighted average number of common shares - basic		9,792,032		7,279,178		8,673,106		7,218,147
Effect of dilutive securities:
Employee stock-based compensation awards and warrants		568,269		286,061		421,585		286,061
Weighted average number of common shares - diluted		10,360,301		7,565,239		9,094,691		7,504,208
Basic earnings per common share	$	0.28	$	0.28	$	0.86	$	0.58
Diluted earnings per common share	$	0.27	$	0.26	$	0.82	$	0.56
Anti-dilutive warrants and stock options		7,246		261,475		78,490		261,475

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Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2018

Commitments And Contingencies Disclosure [Abstract]

Schedule of Unfunded Commitments

Unfunded commitments are as follows:

	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Unfunded loan commitments	$	142,657	$	134,536
Commercial and standby letters of credit		85		91
Total	$	142,742	$	134,627

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis

The following table presents the assets and liabilities measured at fair value on a recurring basis:

	September 30, 2018
	Level 1		Level 2		Level 3		Total
	(Dollars in thousands)
Assets:
U.S. Government agencies	$	—	$	1,906	$	—	$	1,906
Residential mortgage-backed securities		—		26,048		—		26,048
Corporate bonds and other debt securities		—		5,495		—		5,495
SBA servicing rights		—		—		3,561		3,561
Total	$	—	$	33,449	$	3,561	$	37,010

	December 31, 2017
	Level 1		Level 2		Level 3		Total
	(Dollars in thousands)
Assets:
U.S. Government agencies	$	—	$	1,949	$	—	$	1,949
Residential mortgage-backed securities		—		29,629		—		29,629
Corporate bonds and other debt securities		—		5,665		—		5,665
SBA servicing rights		—		—		3,411		3,411
Total	$	—	$	37,243	$	3,411	$	40,654

Schedule of Assets Measured at Fair Value on Non-Recurring Basis

The following tables provide information about certain assets measured at fair value on a non-recurring basis:

	Estimated Fair Value
	September 30, 2018		December 31, 2017
	(Dollars in thousands)
Assets (classified in Level 3):
Impaired loans	$	1,913	$	2,553
Other real estate and repossessed assets		289		21

Significant Unobservable Inputs Used in Recurring and Non-Recurring Fair Value Measurements

The following tables show significant unobservable inputs used in the recurring and non-recurring fair value measurements of Level 3 assets:

Level 3 Asset	Fair Value		Valuation Technique	Unobservable Inputs	Range/Weighted Average
September 30, 2018
Non-recurring:
Impaired loans	$	1,913	Third party appraisals	Collateral discounts	0.0% - 100.0% (84.7%)
Other real estate owned		289	Third party appraisals	Collateral discounts and estimated cost to sell		10.0	%
Recurring:
SBA servicing assets		3,561	Discounted cash flows	Conditional prepayment rate		7.1	%
				Discount rate		14.3	%
December 31, 2017
Non-recurring:
Impaired loans	$	2,553	Third party appraisals	Collateral discounts	0.0% - 100.0% (11.6%)
Other real estate owned		21	Third party appraisals	Collateral discounts and estimated cost to sell		10.0	%
Recurring:
SBA servicing assets		3,411	Discounted cash flows	Conditional prepayment rate		6.7	%
				Discount rate		14.1	%

Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments

The carrying amounts and estimated fair values, as well as the level within the fair value hierarchy, of the Company’s financial instruments are as follows:

September 30, 2018	Carrying Value		Fair Value		Level 1		Level 2		Level 3
	(Dollars in thousands)
Financial Assets:
Cash and cash equivalents	$	44,138	$	44,138	$	44,138	$	—	$	—
Time deposits in other banks		245		245		245		—		—
Available for sale securities		33,449		33,449		—		33,449		—
FHLB and other bank stock		4,861		4,861		—		4,861		—
Loans, net		947,918		942,987		—		—		942,987
Loans held for sale		5,500		5,880		—		5,880		—
Accrued interest receivable		3,715		3,715		—		3,715		—
Bank-owned life insurance		483		483		—		483		—
SBA servicing rights		3,561		3,561		—		—		3,561
Financial Liabilities:
Deposits	$	872,610	$	843,522	$	—	$	843,522	$	—
Accrued interest payable		475		475		—		475		—
Short-term borrowings		10,000		10,000		—		10,000		—
Long-term borrowings		64,961		63,233		—		63,233		—

December 31, 2017	Carrying Value		Fair Value		Level 1		Level 2		Level 3
	(Dollars in thousands)
Financial Assets:
Cash and cash equivalents	$	57,949	$	57,949	$	57,949	$	—	$	—
Time deposits in other banks		245		245		245		—		—
Available for sale securities		37,243		37,243		—		37,243		—
FHLB and other bank stock		4,812		4,812		—		4,812		—
Loans, net		863,467		870,749		—		—		870,749
Loans held for sale		3,814		4,188		—		4,188		—
Accrued interest receivable		3,466		3,466		—		3,466		—
Bank-owned life insurance		479		479		—		479		—
SBA servicing rights		3,411		3,411		—		—		3,411
Financial Liabilities:
Deposits	$	835,368	$	840,645	$	—	$	840,645	$	—
Accrued interest payable		407		407		—		407		—
Short-term borrowings		15,000		15,000		—		15,000		—
Long-term borrowings		76,411		67,310		—		67,310		—

XML

Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, $ in Thousands			9 Months Ended
	May 04, 2018 USD ($) $ / shares shares	Mar. 16, 2017	Sep. 30, 2018 USD ($) shares	Sep. 30, 2017 shares
Subsidiary Sale Of Stock [Line Items]
Reverse stock split, description			As a result of the reverse stock split, every two shares of the Company’s issued and outstanding common stock were consolidated into one issued and outstanding share of common stock. The computations of all share and per share amounts in this Quarterly Report on Form 10-Q (this “Form 10-Q”) have been adjusted retroactively to reflect the reverse stock split.
Reverse split of issued and outstanding common stock, ratio		0.5
Net proceeds from initial public offering | $			$ 42,058
Percentage of Revenue earned with in the scope of ASU201-09			5.00%
Common Stock
Subsidiary Sale Of Stock [Line Items]
Number of shares issued and sold | shares			2,300,000	1
Common Stock | Initial Public Offering
Subsidiary Sale Of Stock [Line Items]
Number of shares issued and sold | shares	2,300,000
Stock issued, price per share | $ / shares	$ 21.00
Gross proceeds before deducting underwriting discounts and offering expenses | $	$ 48,300
Net proceeds from initial public offering | $	$ 42,100
Common Stock | Underwriters
Subsidiary Sale Of Stock [Line Items]
Number of shares issued and sold | shares	300,000

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Investment Securities - Schedule of Fair Values of Securities Available for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Securities available for sale, Amortized Cost	$ 34,889	$ 37,877
Securities available for sale, Unrealized Losses	1,440	634
Available for sale securities, at fair value	33,449	37,243
U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Securities available for sale, Amortized Cost	2,014	2,010
Securities available for sale, Unrealized Losses	108	61
Available for sale securities, at fair value	1,906	1,949
Residential Mortgage-backed Securities
Schedule Of Available For Sale Securities [Line Items]
Securities available for sale, Amortized Cost	27,197	30,156
Securities available for sale, Unrealized Losses	1,149	527
Available for sale securities, at fair value	26,048	29,629
Corporate Bonds and Other Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Securities available for sale, Amortized Cost	5,678	5,711
Securities available for sale, Unrealized Losses	183	46
Available for sale securities, at fair value	$ 5,495	$ 5,665

XML

Investment Securities - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) Security	Sep. 30, 2017 Security	Sep. 30, 2018 USD ($) Security	Sep. 30, 2017 Security	Dec. 31, 2017 USD ($)
Investments Debt And Equity Securities [Abstract]
Available for sale securities pledged | $	$ 0		$ 0		$ 0
Debt Securities, Available-for-sale, Restriction Type [Extensible List]	us-gaap:CollateralPledgedMember		us-gaap:CollateralPledgedMember		us-gaap:CollateralPledgedMember
Available for sale, securities number of positions	50		50
Available for sale, securities in unrealized loss positions, number of positions	49		49
Available for sale, securities in unrealized loss positions, number of positions, less than 12 months	6		6
Available for sale securities, gross realized gain (loss), excluding other than temporary impairments | $			$ 0
Number of securities sold	0	0	0	0

XML

Investment Securities - Schedule of Securities Available for Sale by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available for sale:
Due after one year through five years, Amortized Cost	$ 4,117
Due after five years through ten years, Amortized Cost	3,098
Due after ten years, Amortized Cost	477
Total available for sale, Amortized Cost	34,889	$ 37,877
Available for sale:
Due after one year through five years. Fair Value	3,998
Due after five years through ten years. Fair Value	2,954
Due after ten years. Fair Value	449
Total available for sale, Fair Value	33,449	37,243
Residential Mortgage-backed Securities
Available for sale:
Total available for sale, Amortized Cost	27,197	30,156
Available for sale:
Total available for sale, Fair Value	$ 26,048	$ 29,629

XML

Investment Securities - Schedule of Investment Securities Available for Sale and Aggregated by Investment Category and Length of Time Individual Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Investment Securities, Available for sale, Fair Value, Less than 12 Months	$ 3,672	$ 37,241
Investment Securities, Available for sale, Unrealized Loss, Less than 12 Months	144	634
Investment Securities, Available for sale, Fair Value, 12 Months or More	29,775
Investment Securities, Available for sale, Unrealized Loss, 12 Months or More	1,296
Investment Securities, Available for sale, Fair Value	33,447	37,241
Investment Securities, Available for sale, Unrealized Loss	1,440	634
U.S. Government Agencies
Schedule Of Available For Sale Securities [Line Items]
Investment Securities, Available for sale, Fair Value, Less than 12 Months		1,949
Investment Securities, Available for sale, Unrealized Loss, Less than 12 Months		61
Investment Securities, Available for sale, Fair Value, 12 Months or More	1,906
Investment Securities, Available for sale, Unrealized Loss, 12 Months or More	108
Investment Securities, Available for sale, Fair Value	1,906	1,949
Investment Securities, Available for sale, Unrealized Loss	108	61
Residential Mortgage-backed Securities
Schedule Of Available For Sale Securities [Line Items]
Investment Securities, Available for sale, Fair Value, Less than 12 Months	1,121	29,627
Investment Securities, Available for sale, Unrealized Loss, Less than 12 Months	63	527
Investment Securities, Available for sale, Fair Value, 12 Months or More	24,925
Investment Securities, Available for sale, Unrealized Loss, 12 Months or More	1,086
Investment Securities, Available for sale, Fair Value	26,046	29,627
Investment Securities, Available for sale, Unrealized Loss	1,149	527
Corporate Bonds and Other Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Investment Securities, Available for sale, Fair Value, Less than 12 Months	2,551	5,665
Investment Securities, Available for sale, Unrealized Loss, Less than 12 Months	81	46
Investment Securities, Available for sale, Fair Value, 12 Months or More	2,944
Investment Securities, Available for sale, Unrealized Loss, 12 Months or More	102
Investment Securities, Available for sale, Fair Value	5,495	5,665
Investment Securities, Available for sale, Unrealized Loss	$ 183	$ 46

XML

Loans, Net - Summary of Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[1]	$ 954,074		$ 869,119
Allowance for loan losses		(6,156)	$ (6,015)	(5,652)	$ (5,464)	$ (4,891)	$ (4,357)
Loans, net		947,918		863,467
Commercial and Industrial Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[2]	159,776		135,040
Consumer Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		18,174		22,736
Municipal and Other Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		51,501		53,632
Real Estate | 1-4 Single Family Residential Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		244,633		232,510
Real Estate | Construction, Land and Development
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		155,778		139,470
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		$ 324,212		$ 285,731

[1] Balance includes $(3.6) million and $(3.4) million of deferred fees, cost, premium and discount as of September 30, 2018 and December 31, 2017, respectively.

[2] Balance includes $75.9 million and $67.1 million of the unguaranteed portion of SBA loans as of September 30, 2018 and December 31, 2017, respectively.

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Loans, Net - Summary of Loans (Parenthetical) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Deferred fees, cost, premium and discount	$ (3.6)	$ (3.4)
SBA Loans
Accounts Notes And Loans Receivable [Line Items]
Unguaranteed portion of loans	$ 75.9	$ 67.1

XML

Loans, Net - Additional Information (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Pledged loans, collateral for FHLB advances	$ 376,400,000			$ 376,400,000		$ 358,200,000
Unfunded commitments to related parties	142,742,000			142,742,000		134,627,000
Executive Officers and Directors
Accounts Notes And Loans Receivable [Line Items]
Unfunded commitments to related parties	0			0		0
Consumer Mortgage Loans
Accounts Notes And Loans Receivable [Line Items]
Recorded mortgage loans in process of foreclosure	0			0		$ 0
SBA Loans | Director
Accounts Notes And Loans Receivable [Line Items]
Servicing loans sold		$ 1,500,000
Realized gains on servicing loans sold		$ 0
SBA Loans | Third Party
Accounts Notes And Loans Receivable [Line Items]
Servicing loans sold	19,000,000		$ 16,900,000	49,000,000	$ 52,300,000
Realized gains on servicing loans sold	$ 1,400,000		$ 1,400,000	$ 3,900,000	$ 4,700,000

XML

Loans, Net - Summary of Loans to Related Parties and Principal Owners (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Receivables [Abstract]
Principal outstanding, beginning of year		$ 421	$ 516	$ 463	$ 9,036
Additions (reductions) of affiliations					(8,425)
Repayments	[1]	(19)	(26)	(61)	(121)
Principal outstanding, end of year		$ 402	$ 490	$ 402	$ 490

[1] During the three months ended June 30, 2017 there was a reclassification of repayments to reductions of affiliations.

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Allowance for Loan and Lease Losses - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) Loan	Dec. 31, 2017 USD ($) Loan
Financing Receivable Recorded Investment Past Due [Line Items]
Amount of defaults Lookback period	5 years
Historical loss experience period	5 years
Recorded investment, 90 days past due and still accruing	$ 426	$ 33
Non-accrual loans, Past due	$ 3,318	$ 3,562
Financing Receivables, Past Due Greater Than 90 Days or More and Still Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, 90 days past due and still accruing number of loans | Loan	1	1
Non-accrual loans, Past due	$ 917	$ 427
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Non-accrual loans, Past due	355	209
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Non-accrual loans, Past due	$ 337	$ 57

XML

Allowance for Loan and Lease Losses - Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	$ 6,015	$ 4,891	$ 5,652	$ 4,357
Charge-offs	(349)	(31)	(1,029)	(699)
Recoveries	4		73	2
Provision	486	604	1,460	1,804
Ending Balance	6,156	5,464	6,156	5,464
Commercial and Industrial Loans
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	4,886	2,582	3,046	2,347
Charge-offs	(275)	(15)	(920)	(555)
Recoveries	4		73	2
Provision	76	20	2,492	793
Ending Balance	4,691	2,587	4,691	2,587
Real Estate | 1-4 Single Family Residential Loans
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	318	732	902	647
Charge-offs			(5)
Provision	(216)	201	(795)	286
Ending Balance	102	933	102	933
Real Estate | Construction, Land and Development Loans
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	195	412	441	364
Provision	256	103	10	151
Ending Balance	451	515	451	515
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	233	800	898	667
Charge-offs				(15)
Provision	495	255	(170)	403
Ending Balance	728	1,055	728	1,055
Consumer Loans and Leases
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	346	204	198	186
Charge-offs	(74)	(16)	(104)	(129)
Provision	(90)	(15)	88	116
Ending Balance	182	173	182	173
Municipal and Other Loans
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	37	161	167	146
Provision	(35)	40	(165)	55
Ending Balance	$ 2	$ 201	$ 2	$ 201

XML

Allowance for Loan and Lease Losses - Summary of Aging Analysis of Recorded Investment for Delinquent Loans by Portfolio and Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	$ 948,133	$ 864,022
Recorded investment, Non-accrual	3,318	3,562
Recorded investment, Total	954,074	869,119
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	2,070	1,452
Recorded investment, Non-accrual	355	209
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	127	50
Recorded investment, Non-accrual	337	57
Financing Receivables, Past Due Greater Than 90 Days or More and Still Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	426	33
Recorded investment, Non-accrual	917	427
Commercial and Industrial Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	155,996	132,775
Recorded investment, Non-accrual	2,421	1,927
Recorded investment, Total	159,776	135,040
Commercial and Industrial Loans | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	1,246	302
Commercial and Industrial Loans | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	113	3
Commercial and Industrial Loans | Financing Receivables, Past Due Greater Than 90 Days or More and Still Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due		33
Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	242,606	230,738
Recorded investment, Non-accrual	825	1,135
Recorded investment, Total	244,633	232,510
Real Estate | 1-4 Single Family Residential Loans | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	776	637
Real Estate | 1-4 Single Family Residential Loans | Financing Receivables, Past Due Greater Than 90 Days or More and Still Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	426
Real Estate | Construction, Land and Development
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	155,767	139,470
Recorded investment, Total	155,778	139,470
Real Estate | Construction, Land and Development | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	11
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	324,212	284,869
Recorded investment, Non-accrual		447
Recorded investment, Total	324,212	285,731
Real Estate | Commercial Real Estate Loans (Including Multifamily) | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due		415
Consumer Loans and Leases
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	18,051	22,538
Recorded investment, Non-accrual	72	53
Recorded investment, Total	18,174	22,736
Consumer Loans and Leases | Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	37	98
Consumer Loans and Leases | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	14	47
Municipal and Other Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	51,501	53,632
Recorded investment, Total	$ 51,501	$ 53,632

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Allowance for Loan and Lease Losses - Summary of Loans by Key Indicators of Credit Quality (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 954,074	$ 869,119
Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	927,595	847,754
Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	13,005	10,701
Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	13,287	10,664
Doubtful
Financing Receivable Recorded Investment [Line Items]
Total loans	187
Commercial and Industrial Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	159,776	135,040
Commercial and Industrial Loans | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	151,088	129,288
Commercial and Industrial Loans | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	2,904	2,331
Commercial and Industrial Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	5,597	3,421
Commercial and Industrial Loans | Doubtful
Financing Receivable Recorded Investment [Line Items]
Total loans	187
Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	244,633	232,510
Real Estate | 1-4 Single Family Residential Loans | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	240,081	228,450
Real Estate | 1-4 Single Family Residential Loans | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans		1,090
Real Estate | 1-4 Single Family Residential Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	4,552	2,970
Real Estate | Construction, Land and Development
Financing Receivable Recorded Investment [Line Items]
Total loans	155,778	139,470
Real Estate | Construction, Land and Development | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	154,305	137,760
Real Estate | Construction, Land and Development | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	315	1,403
Real Estate | Construction, Land and Development | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	1,158	307
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Financing Receivable Recorded Investment [Line Items]
Total loans	324,212	285,731
Real Estate | Commercial Real Estate Loans (Including Multifamily) | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	312,574	276,096
Real Estate | Commercial Real Estate Loans (Including Multifamily) | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	9,786	5,877
Real Estate | Commercial Real Estate Loans (Including Multifamily) | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	1,852	3,758
Consumer Loans and Leases
Financing Receivable Recorded Investment [Line Items]
Total loans	18,174	22,736
Consumer Loans and Leases | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	18,046	22,528
Consumer Loans and Leases | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	128	208
Municipal and Other Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	51,501	53,632
Municipal and Other Loans | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 51,501	$ 53,632

XML

Allowance for Loan and Lease Losses - Summary of Investment in Loans Disaggregated Based on Method of Evaluating Impairment (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment	$ 3,536	$ 3,986
Loans - Recorded Investment, Collectively Evaluated for Impairment	950,538	865,133
Allowance for Credit Loss, Individually Evaluated for Impairment	1,109	1,361
Allowance for Credit Loss, Collectively Evaluated for Impairment	5,047	4,291
Commercial and Industrial Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment	2,494	2,194
Loans - Recorded Investment, Collectively Evaluated for Impairment	157,282	132,846
Allowance for Credit Loss, Individually Evaluated for Impairment	1,085	1,226
Allowance for Credit Loss, Collectively Evaluated for Impairment	3,606	1,820
Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment	970	1,292
Loans - Recorded Investment, Collectively Evaluated for Impairment	243,663	231,218
Allowance for Credit Loss, Individually Evaluated for Impairment		119
Allowance for Credit Loss, Collectively Evaluated for Impairment	102	783
Real Estate | Construction, Land and Development
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Collectively Evaluated for Impairment	155,778	139,470
Allowance for Credit Loss, Collectively Evaluated for Impairment	451	441
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment		447
Loans - Recorded Investment, Collectively Evaluated for Impairment	324,212	285,284
Allowance for Credit Loss, Collectively Evaluated for Impairment	728	898
Consumer Loans and Leases
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment	72	53
Loans - Recorded Investment, Collectively Evaluated for Impairment	18,102	22,683
Allowance for Credit Loss, Individually Evaluated for Impairment	24	16
Allowance for Credit Loss, Collectively Evaluated for Impairment	158	182
Municipal and Other Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Collectively Evaluated for Impairment	51,501	53,632
Allowance for Credit Loss, Collectively Evaluated for Impairment	$ 2	$ 167

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Allowance for Loan and Lease Losses - Summary of Information Regarding Impaired Loans Evaluated for Specific Reserves (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Financing Receivable Impaired [Line Items]
Impaired Loans - With Allowance, Recorded Investment	$ 1,838		$ 1,838		$ 1,983
Impaired Loans - With Allowance, Unpaid Principal Balance	6,214		6,214		2,021
Impaired Loans - With Allowance, Related Allowance	1,109		1,109		1,361
Impaired Loans - With no Allowance, Recorded Investment	1,698		1,698		2,003
Impaired Loans - With no Allowance, Unpaid Principal Balance	2,532		2,532		2,007
Average Recorded Investment	3,618	$ 5,334	3,840	$ 5,474
Commercial and Industrial Loans
Financing Receivable Impaired [Line Items]
Impaired Loans - With Allowance, Recorded Investment	1,784		1,784		1,811
Impaired Loans - With Allowance, Unpaid Principal Balance	6,159		6,159		1,850
Impaired Loans - With Allowance, Related Allowance	1,085		1,085		1,226
Impaired Loans - With no Allowance, Recorded Investment	710		710		383
Impaired Loans - With no Allowance, Unpaid Principal Balance	1,514		1,514		386
Average Recorded Investment	2,571	2,220	2,774	2,363
Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Impaired [Line Items]
Impaired Loans - With Allowance, Recorded Investment					119
Impaired Loans - With Allowance, Unpaid Principal Balance					119
Impaired Loans - With Allowance, Related Allowance					119
Impaired Loans - With no Allowance, Recorded Investment	970		970		1,173
Impaired Loans - With no Allowance, Unpaid Principal Balance	1,000		1,000		1,174
Average Recorded Investment	975	750	990	756
Real Estate | Construction, Land and Development
Financing Receivable Impaired [Line Items]
Average Recorded Investment		312		316
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Financing Receivable Impaired [Line Items]
Impaired Loans - With no Allowance, Recorded Investment					447
Impaired Loans - With no Allowance, Unpaid Principal Balance					447
Average Recorded Investment		1,997		1,983
Consumer Loans and Leases
Financing Receivable Impaired [Line Items]
Impaired Loans - With Allowance, Recorded Investment	54		54		53
Impaired Loans - With Allowance, Unpaid Principal Balance	55		55		52
Impaired Loans - With Allowance, Related Allowance	24		24		$ 16
Impaired Loans - With no Allowance, Recorded Investment	18		18
Impaired Loans - With no Allowance, Unpaid Principal Balance	18		18
Average Recorded Investment	$ 72	$ 55	$ 76	$ 56

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Allowance for Loan and Lease Losses - Summary of Troubled Debt Restructurings (TDRs) Based Upon Delinquency Status (Details) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2017 Contract	Sep. 30, 2018 USD ($) Contract	Sep. 30, 2017 Contract	Dec. 31, 2017 USD ($) Contract
Financing Receivable Modifications [Line Items]
Number of contracts		11		15
Recorded Investment | $		$ 688		$ 921
Allowance attributable to TDRs | $		$ 113		$ 411
Commercial and Industrial Loans
Financing Receivable Modifications [Line Items]
Number of contracts	2	7	10
Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Modifications [Line Items]
Number of contracts		1
Performing TDRs
Financing Receivable Modifications [Line Items]
Number of contracts		6		5
Recorded Investment | $		$ 218		$ 270
Performing TDRs | Commercial and Industrial Loans
Financing Receivable Modifications [Line Items]
Number of contracts		4		5
Recorded Investment | $		$ 73		$ 270
Performing TDRs | Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Modifications [Line Items]
Number of contracts		2
Recorded Investment | $		$ 145
Nonperforming TDRs
Financing Receivable Modifications [Line Items]
Number of contracts		5		10
Recorded Investment | $		$ 470		$ 651

XML

Allowance for Loan and Lease Losses - Summary of TDRs Includes Newly Designated TDRs and Modifications to Existing TDRs (Details) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($) Contract	Sep. 30, 2018 USD ($) Contract	Sep. 30, 2017 USD ($) Contract	Dec. 31, 2017 Contract
Financing Receivable Modifications [Line Items]
Number of contracts | Contract		11		15
Commercial and Industrial Loans
Financing Receivable Modifications [Line Items]
Number of contracts | Contract	2	7	10
Pre- Modification Outstanding Recorded Investment	$ 38	$ 442	$ 465
Post- Modification Outstanding Recorded Investment	$ 38	442	465
Related Allowance		$ 113	$ 126
Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Modifications [Line Items]
Number of contracts | Contract		1
Pre- Modification Outstanding Recorded Investment		$ 34
Post- Modification Outstanding Recorded Investment		$ 34

XML

Goodwill and Intangibles - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 4,485	$ 4,485
Core deposit intangible	7,179	7,179
Total	11,664	11,664
Less: Accumulated amortization	(4,220)	(3,693)
Total, net	$ 7,444	$ 7,971

XML

Goodwill and Intangibles - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 176	$ 176	$ 527	$ 527
Core Deposit Intangible
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets			$ 527	$ 527

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Goodwill and Intangibles - Schedule of Estimated Amortization Expense for Intangible Assets (Details) - Core Deposit Intangible $ in Thousands	Sep. 30, 2018 USD ($)
Finite Lived Intangible Assets [Line Items]
Remainder of 2018	$ 176
2019	703
2020	703
2021	607
2022	371
2023	$ 239

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SBA Servicing Asset - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Transfers And Servicing Of Financial Assets [Abstract]
Unpaid principal balances of loans serviced	$ 299.6	$ 275.2

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SBA Servicing Asset - Summary of Activity Pertaining to SBA Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Transfers And Servicing Of Financial Assets [Abstract]
Beginning balance	$ 3,521	$ 3,515	$ 3,411	$ 3,132
Origination of servicing assets	376	367	955	1,132
Change in fair value:
Due to run-off	(254)	(216)	(707)	(600)
Due to market changes	(82)	(172)	(98)	(170)
Ending balance	$ 3,561	$ 3,494	$ 3,561	$ 3,494

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Deposits - Summary of Deposits by Category (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Banking And Thrift [Abstract]
Noninterest-bearing demand deposits	$ 207,727	$ 176,726
Interest-bearing NOW accounts	7,865	7,318
Savings and money market accounts	214,380	243,173
Time deposits	442,638	408,151
Total deposits	872,610	835,368
Time deposits $100,000 and greater	346,844	314,102
Time deposits $250,000 and greater	90,056	82,816
Related party deposits (executive officers and directors)	$ 12,983	$ 13,914

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Deposits - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Banking And Thrift [Abstract]
Aggregate amount of overdraft demand deposits reclassified to loans	$ 15	$ 27
Aggregate amount of maturities for time deposits, period	5 years
Aggregate amount of maturities for time deposits, year one	$ 267,800
Aggregate amount of maturities for time deposits, year two	132,900
Aggregate amount of maturities for time deposits, year three	22,700
Aggregate amount of maturities for time deposits, year four	9,700
Aggregate amount of maturities for time deposits, year five	$ 9,500

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Stock-Based Compensation and Other Benefit Plans - Summary of Option Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares
2008 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options, Outstanding | shares	1,415,350
Options, Exercised | shares	(192,928)
Options, Forfeited | shares	(18,750)	[1]
Options, Outstanding | shares	1,203,672
Options, Exercisable | shares	990,457
Options, Vested | shares	990,457
Weighted Average Exercise Price, Outstanding | $ / shares	$ 12.59
Weighted Average Exercise Price, Exercised | $ / shares	10.63
Weighted Average Exercise Price, Forfeited | $ / shares	13.33	[1]
Weighted Average Exercise Price, Outstanding | $ / shares	12.89
Weighted Average Exercise Price, Exercisable | $ / shares	12.58
Weighted Average Exercise Price, Vested | $ / shares	$ 12.58
Aggregate Intrinsic Value, Exercised | $	$ 2,114
Aggregate Intrinsic Value, Forfeited | $	155
Aggregate Intrinsic Value, Outstanding | $	10,472
Aggregate Intrinsic Value, Exercisable | $	8,924
Aggregate Intrinsic Value, Vested | $	$ 8,924
Weighted Average Remaining Contractual Life (Years), Outstanding	4 years 11 months 1 day
Weighted Average Remaining Contractual Life (Years), Exercisable	4 years 5 months 19 days
Weighted Average Remaining Contractual Life (Years), Vested	4 years 5 months 19 days
2017 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options, Outstanding | shares	127,927
Options, Granted | shares	83,340
Options, Outstanding | shares	211,267
Options, Exercisable | shares	77,335
Options, Vested | shares	77,335
Weighted Average Exercise Price, Outstanding | $ / shares	$ 15.00
Weighted Average Exercise Price, Granted | $ / shares	20.69
Weighted Average Exercise Price, Outstanding | $ / shares	17.25
Weighted Average Exercise Price, Exercisable | $ / shares	15.00
Weighted Average Exercise Price, Vested | $ / shares	$ 15.00
Aggregate Intrinsic Value, Granted | $	$ 75
Aggregate Intrinsic Value, Outstanding | $	917
Aggregate Intrinsic Value, Exercisable | $	510
Aggregate Intrinsic Value, Vested | $	$ 510
Weighted Average Remaining Contractual Life (Years), Outstanding	8 years 10 months 20 days
Weighted Average Remaining Contractual Life (Years), Exercisable	8 years 4 months 28 days
Weighted Average Remaining Contractual Life (Years), Vested	8 years 4 months 28 days

[1] Forfeitures are accounted for in the period they occur.

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Stock-Based Compensation and Other Benefit Plans - Additional Information (Details)	9 Months Ended
	Sep. 30, 2018 USD ($) shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option activity | shares	0
2008 Warrant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Remaining compensation expense to be recognized	$ 0
2008 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost	$ 764,000
Compensation cost recognized weighted average remaining period	2 years
2017 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost	$ 687,000
Compensation cost recognized weighted average remaining period	4 years 3 months 21 days

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Stock-Based Compensation and Other Benefit Plans - Summary of Assumptions Used to Calculated Fair Value Utilizing Black-Scholes Pricing Model (Details) - 2017 Stock Plan	9 Months Ended
	Sep. 30, 2018 $ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility	23.00%
Expected dividend yield	0.00%
Expected term (years)	7 years 6 months
Risk-free interest rate, minimum	2.36%
Risk-free interest rate, maximum	2.87%
Weighted average grant date fair value	$ 6.77

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Stock-Based Compensation and Other Benefit Plans - Summary of Activity for the Spirit of Texas Bancshares, Inc (Details) - 2008 Warrants $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants, Outstanding | shares	105,000
Warrants, Exercised | shares	(45,000)
Warrants, Outstanding | shares	60,000
Warrants, Exercisable | shares	60,000
Warrants, Vested | shares	60,000
Weighted Average Exercise Price, Outstanding | $ / shares	$ 10.00
Weighted Average Exercise Price, Exercised | $ / shares	10.00
Weighted Average Exercise Price, Outstanding | $ / shares	10.00
Weighted Average Exercise Price, Exercisable | $ / shares	10.00
Weighted Average Exercise Price, Vested | $ / shares	$ 10.00
Aggregate Intrinsic Value, Exercised | $	$ 522
Aggregate Intrinsic Value, Outstanding | $	695
Aggregate Intrinsic Value, Exercisable | $	695
Aggregate Intrinsic Value, Vested | $	$ 695
Weighted Average Remaining Contractual Life (Years), Outstanding	1 year 3 months 18 days
Weighted Average Remaining Contractual Life (Years), Exercisable	1 year 3 months 18 days
Weighted Average Remaining Contractual Life (Years), Vested	1 year 3 months 18 days

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Stock-Based Compensation and Other Benefit Plans - Summary of Activity for the Bank4Texas Warrants (Details) - Bank4Texas Warrants $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Warrants, Outstanding | shares	12,072,000
Warrants, Exercised | shares	(1,362,000)
Warrants, Outstanding | shares	10,710,000
Warrants, Exercisable | shares	10,710,000
Warrants, Vested | shares	10,710,000
Weighted Average Exercise Price, Outstanding | $ / shares	$ 10.50
Weighted Average Exercise Price, Exercised | $ / shares	10.50
Weighted Average Exercise Price, Outstanding | $ / shares	10.50
Weighted Average Exercise Price, Exercisable | $ / shares	10.50
Weighted Average Exercise Price, Vested | $ / shares	$ 10.50
Aggregate Intrinsic Value, Exercised | $	$ 15
Aggregate Intrinsic Value, Outstanding | $	119
Aggregate Intrinsic Value, Exercisable | $	119
Aggregate Intrinsic Value, Vested | $	$ 119
Weighted Average Remaining Contractual Life (Years), Outstanding	1 year 10 months 24 days
Weighted Average Remaining Contractual Life (Years), Exercisable	1 year 10 months 24 days
Weighted Average Remaining Contractual Life (Years), Vested	1 year 10 months 24 days

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Basic and Diluted Earnings Per Common Share - Schedule of Computation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Net income as reported	$ 2,771	$ 2,002	$ 7,465	$ 4,230
Less: Participated securities share of undistributed earnings				27
Net income available to common stockholders	$ 2,771	$ 2,002	$ 7,465	$ 4,203
Weighted average number of common shares - basic	9,792,032	7,279,178	8,673,106	7,218,147
Effect of dilutive securities:
Employee stock-based compensation awards and warrants	568,269	286,061	421,585	286,061
Weighted average number of common shares - diluted	10,360,301	7,565,239	9,094,691	7,504,208
Basic earnings per common share	$ 0.28	$ 0.28	$ 0.86	$ 0.58
Diluted earnings per common share	$ 0.27	$ 0.26	$ 0.82	$ 0.56
Anti-dilutive warrants and stock options	7,246	261,475	78,490	261,475

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Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Contingency [Line Items]
Effective tax rate	20.60%	35.50%	20.30%	34.90%
Effective statutory tax rate	21.00%		21.00%		34.00%
Interest and penalties associated with income taxes	$ 0	$ 0	$ 0	$ 0
Other Liabilities
Income Tax Contingency [Line Items]
Uncertain tax position					$ 903,000

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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Unfunded Commitments | Commitments for Exposure to Credit Loss
Loss Contingencies [Line Items]
Reserve for unfunded commitments	$ 40	$ 40

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Commitments and Contingencies - Schedule of Unfunded Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Supply Commitment [Line Items]
Unfunded commitments, Total	$ 142,742	$ 134,627
Commercial and Standby Letters of Credit
Supply Commitment [Line Items]
Unfunded commitments, Total	85	91
Unfunded Loan Commitments
Supply Commitment [Line Items]
Unfunded commitments, Total	$ 142,657	$ 134,536

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Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets:
Total available for sale, Fair Value	$ 33,449	$ 37,243
U.S. Government Agencies
Assets:
Total available for sale, Fair Value	1,906	1,949
Residential Mortgage-backed Securities
Assets:
Total available for sale, Fair Value	26,048	29,629
Corporate Bonds and Other Debt Securities
Assets:
Total available for sale, Fair Value	5,495	5,665
Level 2
Assets:
Total available for sale, Fair Value	33,449	37,243
Fair Value Measurements on Recurring Basis
Assets:
Total available for sale, Fair Value	37,010	40,654
Fair Value Measurements on Recurring Basis | U.S. Government Agencies
Assets:
Total available for sale, Fair Value	1,906	1,949
Fair Value Measurements on Recurring Basis | Residential Mortgage-backed Securities
Assets:
Total available for sale, Fair Value	26,048	29,629
Fair Value Measurements on Recurring Basis | Corporate Bonds and Other Debt Securities
Assets:
Total available for sale, Fair Value	5,495	5,665
Fair Value Measurements on Recurring Basis | SBA Servicing Rights
Assets:
Total available for sale, Fair Value	3,561	3,411
Fair Value Measurements on Recurring Basis | Level 2
Assets:
Total available for sale, Fair Value	33,449	37,243
Fair Value Measurements on Recurring Basis | Level 2 | U.S. Government Agencies
Assets:
Total available for sale, Fair Value	1,906	1,949
Fair Value Measurements on Recurring Basis | Level 2 | Residential Mortgage-backed Securities
Assets:
Total available for sale, Fair Value	26,048	29,629
Fair Value Measurements on Recurring Basis | Level 2 | Corporate Bonds and Other Debt Securities
Assets:
Total available for sale, Fair Value	5,495	5,665
Fair Value Measurements on Recurring Basis | Level 3
Assets:
Total available for sale, Fair Value	3,561	3,411
Fair Value Measurements on Recurring Basis | Level 3 | SBA Servicing Rights
Assets:
Total available for sale, Fair Value	$ 3,561	$ 3,411

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Fair Value Measurements - Additional Information (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)
Fair Value Disclosures [Abstract]
Fair value, assets, level 1 to level 2 transfers	$ 0	$ 0
Fair value, assets, level 2 to level 1 transfers	0	0
Fair value, assets, transfers into level 3	0	0
Fair value, assets, transfers out of level 3	$ 0	$ 0

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Fair Value Measurements - Schedule of Assets Measured at Fair Value on Non-Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets (classified in Level 3):
Other real estate owned and repossessed assets	$ 289	$ 21
Fair Value Measurements on Non-Recurring Basis | Level 3
Assets (classified in Level 3):
Impaired loans	1,913	2,553
Other real estate owned and repossessed assets	$ 289	$ 21

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Fair Value Measurements - Significant Unobservable Inputs Used in Recurring and Non-Recurring Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other real estate owned	$ 289		$ 21
SBA servicing asset	3,561	$ 3,521	3,411	$ 3,494	$ 3,515	$ 3,132
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
SBA servicing asset	3,561		3,411
Level 3 | Fair Value Measurements on Non-Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	1,913		2,553
Other real estate owned	$ 289		$ 21
Level 3 | Fair Value Measurements on Non-Recurring Basis | Weighted Average | Collateral Discounts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average	84.70%		11.60%
Level 3 | Fair Value Measurements on Non-Recurring Basis | Weighted Average | Collateral Discounts and Estimated Cost to Sell
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average	10.00%		10.00%
Level 3 | Fair Value Measurements on Non-Recurring Basis | Minimum | Collateral Discounts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average	0.00%		0.00%
Level 3 | Fair Value Measurements on Non-Recurring Basis | Maximum | Collateral Discounts
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average	100.00%		100.00%
Level 3 | Fair Value Measurements on Recurring Basis | Weighted Average | Conditional Prepayment Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average	7.10%		6.70%
Level 3 | Fair Value Measurements on Recurring Basis | Weighted Average | Discount Rate
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Range/Weighted Average	14.30%		14.10%
Level 3 | Third Party Appraisals | Fair Value Measurements on Non-Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	$ 1,913		$ 2,553
Other real estate owned	289		21
Level 3 | Discounted Cash Flows | Fair Value Measurements on Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
SBA servicing asset	$ 3,561		$ 3,411

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Fair Value Measurements - Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Financial Assets:
Total available for sale, Fair Value	$ 33,449		$ 37,243
SBA servicing rights	3,561	$ 3,521	3,411	$ 3,494	$ 3,515	$ 3,132
Level 1
Financial Assets:
Cash and cash equivalents	44,138		57,949
Time deposits in other banks	245		245
Level 2
Financial Assets:
Total available for sale, Fair Value	33,449		37,243
FHLB and other bank stock	4,861		4,812
Loans held for sale	5,880		4,188
Accrued interest receivable	3,715		3,466
Bank-owned life insurance	483		479
Financial Liabilities:
Deposits	843,522		840,645
Accrued interest payable	475		407
Short-term borrowings	10,000		15,000
Long-term borrowings	63,233		67,310
Level 3
Financial Assets:
Loans, net	942,987		870,749
SBA servicing rights	3,561		3,411
Carrying Value
Financial Assets:
Cash and cash equivalents	44,138		57,949
Time deposits in other banks	245		245
Total available for sale, Fair Value	33,449		37,243
FHLB and other bank stock	4,861		4,812
Loans, net	947,918		863,467
Loans held for sale	5,500		3,814
Accrued interest receivable	3,715		3,466
Bank-owned life insurance	483		479
SBA servicing rights	3,561		3,411
Financial Liabilities:
Deposits	872,610		835,368
Accrued interest payable	475		407
Short-term borrowings	10,000		15,000
Long-term borrowings	64,961		76,411
Fair Value
Financial Assets:
Cash and cash equivalents	44,138		57,949
Time deposits in other banks	245		245
Total available for sale, Fair Value	33,449		37,243
FHLB and other bank stock	4,861		4,812
Loans, net	942,987		870,749
Loans held for sale	5,880		4,188
Accrued interest receivable	3,715		3,466
Bank-owned life insurance	483		479
SBA servicing rights	3,561		3,411
Financial Liabilities:
Deposits	843,522		840,645
Accrued interest payable	475		407
Short-term borrowings	10,000		15,000
Long-term borrowings	$ 63,233		$ 67,310