Spirit of Texas Bancshares (STXB) 10-Q 7 Aug 20 2020 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2020	Aug. 03, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
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	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		17,344,661
Entity Shell Company	false
Title of 12(b) Security	Common Stock, no par value
Security Exchange Name	NASDAQ
Entity File Number	001-38484
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	TX
Entity Tax Identification Number	90-0499552
Entity Address, Address Line One	1836 Spirit of Texas Way
Entity Address, City or Town	Conroe
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77301
City Area Code	936
Local Phone Number	521-1836
Document Quarterly Report	true
Document Transition Report	false

CONSOLIDATED BALANCE SHEETS (Un

CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Assets:
Cash and due from banks		$ 35,248	$ 32,490
Interest-bearing deposits in other banks		200,096	293,467
Total cash and cash equivalents		235,344	325,957
Time deposits in other banks			490
Investment securities:
Available for sale securities, at fair value		90,878	96,937
Total investment securities		90,878	96,937
Loans held for sale		7,718	3,989
Loans:
Loans held for investment	[1]	2,427,292	1,767,182
Less: allowance for loan and lease losses		(9,905)	(6,737)
Loans, net		2,417,387	1,760,445
Premises and equipment, net		79,156	75,150
Accrued interest receivable		12,188	6,507
Other real estate owned and repossessed assets		3,743	3,653
Goodwill		77,966	68,503
Core deposit intangible		9,617	11,472
SBA servicing asset		3,115	3,355
Bank-owned life insurance		15,787	15,610
Federal Home Loan Bank and other bank stock, at cost		5,696	8,310
Other assets		4,423	4,244
Total assets		2,963,018	2,384,622
Transaction accounts:
Noninterest-bearing		745,646	444,822
Interest-bearing		946,969	803,557
Total transaction accounts		1,692,615	1,248,379
Time deposits		722,376	679,747
Total deposits		2,414,991	1,928,126
Accrued interest payable		1,025	1,219
Short-term borrowings		10,000
Long-term borrowings		183,076	105,140
Deferred tax liability, net		405	672
Other liabilities		5,944	3,760
Total liabilities		2,615,441	2,038,917
Commitments and contingencies (Note 13)
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; 18,304,245 and 18,272,245 shares issued; 17,969,012 and 18,258,222 shares outstanding		298,176	297,188
Retained earnings		59,907	48,139
Accumulated other comprehensive income		1,272	667
Treasury stock		(11,778)	(289)
Total stockholders' equity		347,577	345,705
Total liabilities and stockholders' equity		$ 2,963,018	$ 2,384,622
[1]	Organic loans balance includes $(13.1) million and $(4.2) million of deferred fees, cost, premium and discount as of June 30, 2020 and December 31, 2019, respectively.

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2020	Dec. 31, 2019
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	18,304,245	18,272,245
Common stock, shares, outstanding	17,969,012	18,258,222

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest income:
Interest and fees on loans	$ 29,912	$ 22,204	$ 57,321	$ 39,322
Interest and dividends on investment securities	457	1,302	961	2,484
Other interest income	185	794	1,085	1,378
Total interest income	30,554	24,300	59,367	43,184
Interest expense:
Interest on deposits	3,945	3,938	8,452	7,009
Interest on FHLB advances and other borrowings	558	611	1,066	989
Total interest expense	4,503	4,549	9,518	7,998
Net interest income	26,051	19,751	49,849	35,186
Provision for loan losses	2,838	332	4,009	1,181
Net interest income after provision for loan losses	23,213	19,419	45,840	34,005
Noninterest income:
Service charges and fees	1,270	969	2,581	1,698
SBA loan servicing fees	256	40	266	304
Mortgage referral fees	357	198	559	308
Swap referral fees	262		842
Gain on sales of loans, net	326	1,384	790	2,188
Gain on sales of investment securities		1,053		2,134
Other noninterest income	94	131	239	200
Total noninterest income	2,565	3,775	5,277	6,832
Noninterest expense:
Salaries and employee benefits	7,946	8,765	19,735	15,889
Occupancy and equipment expenses	2,761	1,690	5,076	2,952
Professional services	716	1,022	1,611	2,063
Data processing and network	849	731	1,592	1,216
Regulatory assessments and insurance	379	315	781	413
Amortization of intangibles	919	1,006	1,865	1,609
Advertising	119	167	272	264
Marketing	38	132	198	271
Telephone expense	483	338	890	478
Conversion expense	69	453	1,546	1,604
Other operating expenses	1,825	1,206	3,498	2,070
Total noninterest expense	16,104	15,825	37,064	28,829
Income before income tax expense	9,674	7,369	14,053	12,008
Income tax expense	1,980	1,542	2,285	2,371
Net income	$ 7,694	$ 5,827	$ 11,768	$ 9,637
Earnings per common share:
Basic	$ 0.44	$ 0.42	$ 0.66	$ 0.74
Diluted	$ 0.44	$ 0.41	$ 0.65	$ 0.72
Weighted average common shares outstanding:
Basic	17,581,959	13,765,929	17,883,034	12,963,700
Diluted	17,612,919	14,236,244	17,999,206	13,432,760

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 7,694	$ 5,827	$ 11,768	$ 9,637
Other comprehensive income (loss):
Unrealized net holding gains on investment securities available for sale, net of taxes of $143, $390, $160, and $699, respectively	540	1,468	605	2,630
Reclassification adjustment for realized (gains) losses on investment securities available for sale included in net income, net of taxes of $0, $260, $0, and $529, respectively		(976)		(1,988)
Total other comprehensive income	540	492	605	642
Total comprehensive income	$ 8,234	$ 6,319	$ 12,373	$ 10,279

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Unrealized net holding gains on investment securities available for sale, tax	$ 143	$ 390	$ 160	$ 699
Reclassification adjustment for realized (gains) losses on investment securities available for sale included in net income, tax	$ 0	$ 260	$ 0	$ 529

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income
Balance at Dec. 31, 2018	$ 198,796	$ 169,939	$ 27,003		$ 1,854
Balance (in shares) at Dec. 31, 2018		12,103,753
Net income	9,637		9,637
Shares issued in offering, net adjustment	33,479	$ 33,479
Shares issued in offering, net adjustment (in shares)		1,579,191
Exercise of stock options and warrants	1,288	$ 1,288
Exercise of stock options and warrants (in shares)		107,388
Stock-based compensation	268	$ 268
Other comprehensive income	642				642
Balance at Jun. 30, 2019	244,110	$ 204,974	36,640		2,496
Balance (in shares) at Jun. 30, 2019		13,790,332
Balance at Mar. 31, 2019	203,976	$ 171,159	30,813		2,004
Balance (in shares) at Mar. 31, 2019		12,195,891
Net income	5,827		5,827
Shares issued in offering, net adjustment	33,479	$ 33,479
Shares issued in offering, net adjustment (in shares)		1,579,191
Exercise of stock options and warrants	185	$ 185
Exercise of stock options and warrants (in shares)		15,250
Stock-based compensation	151	$ 151
Other comprehensive income	492				492
Balance at Jun. 30, 2019	244,110	$ 204,974	36,640		2,496
Balance (in shares) at Jun. 30, 2019		13,790,332
Balance at Dec. 31, 2019	345,705	$ 297,188	48,139	$ (289)	667
Balance (in shares) at Dec. 31, 2019		18,258,222
Net income	11,768		11,768
Exercise of stock options and warrants	430	$ 430
Exercise of stock options and warrants (in shares)		34,500
Stock-based compensation	558	$ 558
Treasury stock purchases	(11,489)			(11,489)
Treasury stock purchases (in shares)		(924,149)
Other comprehensive income	605				605
Balance at Jun. 30, 2020	347,577	$ 298,176	59,907	(11,778)	1,272
Balance (in shares) at Jun. 30, 2020		17,368,573
Balance at Mar. 31, 2020	345,817	$ 297,966	52,213	(5,094)	732
Balance (in shares) at Mar. 31, 2020		17,969,012
Net income	7,694		7,694
Exercise of stock options and warrants	29	$ 29
Exercise of stock options and warrants (in shares)		2,500
Stock-based compensation	181	$ 181
Treasury stock purchases	(6,684)			(6,684)
Treasury stock purchases (in shares)		(602,939)
Other comprehensive income	540				540
Balance at Jun. 30, 2020	$ 347,577	$ 298,176	$ 59,907	$ (11,778)	$ 1,272
Balance (in shares) at Jun. 30, 2020		17,368,573

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash Flows From Operating Activities:
Net income	$ 11,768	$ 9,637
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	4,009	1,181
Depreciation and amortization	2,232	1,353
Net amortization (accretion) of premium (discount) on investment securities	(146)	180
Amortization of core deposit intangible	1,865	1,609
Accretion of discount on retained SBA loans	(565)	(831)
Deferred tax expense	620	269
Originations of loans held for sale	(13,828)	(24,774)
Proceeds from loans held for sale	10,945	28,422
Net gains on sale of loans held for sale	(790)	(2,188)
Gain on sale of investment securities		(2,134)
(Gain)/Loss on sale of other real estate owned	1	(53)
Fair value adjustment on SBA servicing asset	429	915
Stock-based compensation	558	268
Increase in cash surrender value of BOLI	(177)	(128)
Net change in operating assets and liabilities:
Net change in accrued interest receivable	(4,968)	(955)
Net change in accrued interest payable	(233)	92
Net change in other assets	73	811
Net change in other liabilities	484	(2,306)
Net cash provided by operating activities	12,277	11,368
Cash Flows From Investing Activities:
Purchases of investment securities available for sale	(33,995)	(32,536)
Sales of investment securities available for sale		79,920
Paydown and maturities of investment securities available for sale	41,451	21,135
Purchase of FHLB and other bank stock	(82)	297
Sale of FHLB and other bank stock	2,696
Proceeds from the sale of loans held for investment	50,208
Net change in loans	(453,767)	(20,047)
Proceeds from the sale of other real estate owned	34	884
Purchase of premises and equipment	(4,043)	(4,224)
Net cash (paid)/received in business combination	(129,461)	28,565
Net cash provided by (used in) investing activities	(526,959)	73,994
Cash Flows From Financing Activities:
Net change in deposits	347,192	(11,698)
Redemption of trust preferred securities		77
Proceeds from long-term borrowings	105,780	23,174
Repayment of long-term borrowings	(26,429)	(10,565)
Proceeds from short-term borrowings	23,753
Repayment of short-term borrowings	(13,753)	(12,500)
Net change in secured borrowings	(1,415)	(995)
Purchase of treasury stock	(11,489)
Exercise of stock options and warrants	430	1,288
Net cash provided by financing activities	424,069	(11,219)
Net Change in Cash and Cash Equivalents	(90,613)	74,143
Cash and Cash Equivalents at Beginning of Period	325,957	89,015
Cash and Cash Equivalents at End of Period	235,344	163,158
Supplemental Disclosures of Cash Flow Information:
Interest paid	9,712	7,264
Income taxes paid	2,000	1,000
Supplemental disclosure of noncash investing and financing activities:
Transfer of loans to other real estate owned and repossessed assets	125	15
Fair value of assets acquired in business combination, excluding cash	259,416	405,561
Goodwill recorded	11,456	25,636
Liabilities assumed in business combination	$ 141,412	400,197
Stock issued in business combination		$ 33,480

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB” or the “Company”) is a bank holding company headquartered in Conroe, Texas that provides, through its bank subsidiary, Spirit of Texas Bank, SSB (the “Bank”), a variety of financial services to individuals and corporate customers located largely in the State of Texas, and which customers are primarily involved in agricultural, light industrial and commercial arenas. Risks and Uncertainties COVID-19 Pandemic In December 2019, a novel strain of coronavirus (“COVID-19”) was reported to have surfaced in Wuhan, China, and has since spread to a number of other countries, including the United States. In March 2020, the World Health Organization declared COVID-19 a global pandemic and the United States declared a National Public Health Emergency. The COVID-19 pandemic has severely impacted the level of economic activity in the local, national and global economies and financial markets. During the first and second quarters, many businesses in Texas and many other states temporarily closed due to social distancing and/or shelter in place orders. While many of these businesses have since been allowed to re-open, the Company and its customers continue to be adversely affected by the COVID-19 pandemic. The extent to which the COVID-19 pandemic negatively impacts the Company's business, results of operations, and financial condition, as well as its regulatory capital and liquidity ratios, is unknown at this time and will depend on future developments, including the scope and duration of the pandemic and actions taken by governmental authorities and other third parties in response to the pandemic. If the pandemic is sustained, it may further adversely impact the Company and impair the ability of the Company's customers to fulfill their contractual obligations to the Company. This could cause the Company to experience a material adverse effect on its business operations, asset valuations, financial condition, and results of operations. For additional risks related to the COVID-19 pandemic, see “Risk Factors” in this Form 10-Q, the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, Quarterly Report on Form 10-Q for the period ended March 31, 2020 and other filings with the Securities and Exchange Commission (the “SEC”). In response to the pandemic, the President of the United States signed into law the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”). This legislation aims at providing relief for individuals and businesses that have been negatively impacted by the coronavirus pandemic. The CARES Act includes a provision for the Company to opt out of applying the “troubled debt restructuring” (“TDR”) accounting guidance in ASC 310-40 for certain loan modifications. Loan modifications made between March 1, 2020 and the earlier of i) December 30, 2020 or ii) 60 days after the President declares a termination of the COVID-19 national emergency are eligible for this relief if the related loans were not more than 30 days past due as of December 31, 2019. The Bank adopted this provision. Additionally, the CARES Act contains provisions that impact federal income taxes including but not limited to an extension to pay and file federal tax returns, bonus depreciation on qualified improvement property and the ability to carry back certain net operating losses to a prior year. The Bank will utilize the filing and payment extension and net operating loss carryback provisions. Basis of Presentation The consolidated financial statements include the accounts of the Company and the accounts of its wholly-owned subsidiary, 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 10 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 June 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020 and should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2019 previously filed with the SEC in the Company’s Annual Report on Form 10-K 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. Correction of an Immaterial Error on the Consolidated Balance Sheet and Cash Flow The Company identified an immaterial error pertaining to the accounting of certain loan participations sold impacting its consolidated balance sheet and its consolidated statement of cash flows for the six months ended June 30, 2019. Due to the rights retained on certain loan participations sold, the Company is deemed to have retained effective control over these loans under Financial Accounting Standards Board (“FASB”)’s Accounting Standards Codification (“ASC”) Topic 860, “Transfers and Servicing”, and therefore these participations sold must be accounted for as a secured borrowing. The Company reviewed the impact of this error on the prior periods and determined that the error was not material to the prior period consolidated financial statements. The Company has corrected the immaterial error in Accounting Policies Recently Adopted and Pending Accounting Pronouncements ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting” – Issued in March 2020, Accounting Standards Update (“ASU”) No. 2020-04 provides optional expedients and exceptions for accounting related to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. ASU 2020-04 applies only to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform and do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. ASU 2020-04 was effective upon issuance and generally can be applied through December 31, 2022. The adoption of ASU 2020-04 did not significantly impact the Company’s consolidated financial statements. ASU 2019-11, “Financial Instruments-Credit Losses: Codification Improvements Topic 326” – Issued in November 2019, ASU No. 2019-11 clarifies and addresses specific issues about certain aspects of the amendments in ASU 2016-13. For the Company, the provisions of this ASU are effective for fiscal years beginning after December 15, 2022 including interim periods within those fiscal years. See the discussions regarding the adoption of ASU 2016-13 below. ASU 2019-10, “Financial Instruments-Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842)” – Issued in November 2019, ASU No. 2019-10 addresses the change in philosophy to the effective dates including amendments issued after the issuance of the original ASUs. See the discussions regarding the adoption of ASU 2016-13 and ASU 2016-02 below. ASU 2019-04, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments” – Issued in April 2019, ASU No. 2019-04 clarifies a number of issues discussed at the June 2018 and November 2018 Credit Losses Transition Resource Group meetings. The clarifications address a variety of identified issues including but not limited to the treatment of accrued interest receivable as it relates to the allowance for credit losses, transfers between loan classifications and categories, recoveries, and using projections of future interest rate environments in expected cash flow calculations. Management is evaluating these clarifications concurrently with our assessment of ASU 2016-13. 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 adopted the provisions of this ASU removing fair value disclosure requirements as of December 31, 2018 as early adoption of the removal provisions was allowed and adopted the remaining provisions of the ASU as of January 1, 2020. The provisions of this ASU did not have a material impact on the Company’s consolidated financial statements. 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 adopted all amendments of ASU 2018-09 as of January 1, 2020. Adoption of the amendments did not 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 adopt ed this ASU using the public company effective date as early adoption is permitted . The adoption of ASU 2017-04 did not have a material impact on the Company’s consolidated financial statements. 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 were originally 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. Issued in November 2019, ASU 2019-10, “ ” alters the effective date of ASU 2016-13 for private companies. Under the provisions of ASU 2019-10, ASU 2016-13 is now effective for fiscal years beginning after December 15, 2022 including interim periods within those years for non-public business entities. Earlier application is permitted for interim and annual periods beginning after December 15, 2018. Management has elected to adopt this ASU using the updated 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. In December 2018, the FASB further issued ASU 2018-20, Leases (Topic 842) Narrow-Scope Improvements for Lessors . The amendments in this update permits lessors to make an accounting policy election to not evaluate whether certain sales taxes and other similar taxes are lessor costs or lessee costs and instead account for the costs as if they were lessee costs. Additionally, the amendment requires lessors to exclude from variable payments, and therefore revenue, lessor costs paid by lessees directly to third parties. The amendments also require lessors to account for costs excluded from the consideration of a contract that are paid by the lessor and reimbursed by the lessee as variable payments. In March 2019, the FASB also issued ASU 2019-01, Leases (Topic 842) Codification Improvements, to further clarify certain identified issues regarding implementation of ASU 2016-02. Specifically, the amendments in ASU 2019-01 clarify the determination of fair value of underlying assets by lessors that are not manufacturers or dealers, the cash flow presentation of sales-type or direct financing leases, and transition disclosures for interim periods. Issued in November 201 9 , ASU 201 9 -1 0 , “ Financial Instruments-Credit Losses, Derivatives and Hedging, and Leases ” alters the effective date of ASU 2016- 02 for private companies. Under the provisions of ASU 201 9 -1 0 , ASU 2016- 02 is now effective for fiscal years beginning after December 15, 20 20 including interim periods within those years for non-public business entities. Management will adopt these ASUs using the private company effective date of January 1, 202 1 and is currently evaluating the impact to the consolidated financial statements and related method of adoption, specifically, management is in the process of determining an appropriate discount rate to record identified right-of-use assets .

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2020
Revenue From Contract With Customer [Abstract]
Revenue Recognition	NOTE 2. REVENUE RECOGNITION Spirit accounts for revenue from contracts with customers in accordance with FASB ASC Topic 606, “Revenue from Contracts with Customers,” which provides that revenue be recognized in a manner that depicts the transfer of goods or services to a customer in an amount that reflects the consideration the Company expects to be entitled to in exchange for those goods or services. Revenue from contracts with customers is recognized either over time as performance obligations are fulfilled, or at a point in time when control of the goods or services are transferred to the customer. Spirit’s noninterest income, excluding all of SBA loan servicing fees, gain on sales of loans, net, and gain on sales of investment securities, are considered within the scope of FASB ASC Topic 606. Each category of in-scope revenue streams is discussed below. Deposit Accounts Core Service Charges Core service charges on deposit accounts consist of account analysis fees (i.e., net fees earned on analyzed business and public checking accounts) and monthly service fees. The Company’s performance obligation for account analysis fees and monthly service fees is generally satisfied, and the related revenue recognized, over the period in which the service is provided. Payment for service charges on deposit accounts is primarily received immediately or in the following month through a direct charge to customers’ accounts. Deposit Account Transaction Based Fee Income Transaction based fee income on deposit accounts consists of variable revenue streams associated with activities which a deposit account holder may initiate on a transaction by transaction basis. The majority of transaction based fee income arises from interchange revenue received when deposit customers use a debit card for a point of sale transaction over a third-party card payment network. Interchange revenue is recorded net of related interchange expenses in the month in which the transaction occurs. Merchant services income is realized through a third party service provider who is contracted by the Bank under a referral arrangement. Such fees represent fees charged to merchants to process their debit card transactions, in addition to account management fees. The third-party service provider also issues credit cards as private label in the Company's name in exchange for a referral fee. Fees are earned and recorded in the same period as the referral occurs and the card is issued. Other transaction based service charges on deposit accounts include revenue from processing wire transfers, issuing cashier’s checks, processing check orders, and renting safe deposit boxes. The Company’s performance obligation related to these service charges is largely satisfied, and related revenue recognized, when the services are rendered or upon completion. Payment is typically received immediately or charged to the customers’ account in the period the service is provided. Safe deposit box rental fees are charged to the customer on an annual basis and recognized upon receipt of payment. The Company determined that since rentals and renewals occur fairly consistently over time, revenue is recognized on a basis consistent with the duration of the performance obligation. Referral Fees Spirit utilizes third-party vendors to provide services to the Company and its customers that are not economically feasible to provide on a stand-alone basis. These services include access to the secondary market for mortgage loans not held for investment and providing interest rate swaps to customers interested in hedging interest rate risk. In exchange for providing these third-party vendors with new customers, Spirit receives a referral fee. With respect to mortgage referral fees, the Company’s performance obligation is satisfied when the referred customer closes a mortgage loan with the third-party vendor and payment of the referral fee is typically received immediately. Swap referral fees are recognized when an existing or new loan customer enters into a swap agreement with the third-party vendor. Spirit is not a counterparty to the swap, and the performance obligation is satisfied at the time the swap agreement is signed. Payment of the referral fee is received within three days of the signed swap agreement. The following presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three months and six months ended June 30, 2020 and 2019: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Non-Interest Income In-scope of Topic 606 Deposit accounts core service charges $ 312 $ 149 $ 523 $ 261 Deposit account transaction based fee income 958 829 2,058 1,460 Swap referral fees, included in other non-interest income 262 — 842 — Mortgage referral fees 357 198 559 308 Non-Interest Income (in-scope of Topic 606) 1,889 1,176 3,982 2,029 Non-Interest Income (out-of-scope of Topic 606) 676 2,599 1,295 4,803 Total Non-Interest Income $ 2,565 $ 3,775 $ 5,277 $ 6,832 Contract Balances A contract asset balance occurs when an entity performs a service for a customer before the customer pays consideration (resulting in a contract receivable) or before payment is due (resulting in a contract asset). A contract liability balance is an entity’s obligation to transfer a service to a customer for which the entity has already received payment (or payment is due) from the customer. The Company’s non-interest revenue streams are largely based on transactional activity, or standard month-end revenue accruals. Consideration is often received immediately or shortly after the Company satisfies its performance obligation and revenue is recognized. The Company does not typically enter into long-term revenue contracts with customers, and therefore, does not experience significant contract balances. The Company did not have any significant contract balances at June 30, 2020 or December 31, 2019. Contract Acquisition Costs In connection with the adoption of Topic 606, an entity is required to capitalize, and subsequently amortize into expense, certain incremental costs of obtaining a contract with a customer if these costs are expected to be recovered. The incremental costs of obtaining a contract are those costs that an entity incurs to obtain a contract with a customer that it would not have incurred if the contract had not been obtained (for example, sales commission). The Company utilizes the practical expedient which allows entities to immediately expense contract acquisition costs when the asset that would have resulted from capitalizing these costs would have been amortized in one year or less. The Company has not capitalized any contract acquisition costs for the three and six months ending June 30, 2020 or 2019.

Business Combinations

Business Combinations	6 Months Ended
	Jun. 30, 2020
Business Combinations [Abstract]
Business Combinations	NOTE 3. BUSINESS COMBINATIONS First Beeville Financial Corporation On April 2, 2019 Spirit completed its acquisition of First Beeville Financial Corporation and its subsidiary, The First National Bank of Beeville (together, “Beeville”). This transaction resulted in three additional branches and two loan production offices in the South Texas region. The Company issued 1,579,191 shares of its common stock as well as a net cash payment to Beeville shareholders of $32.4 million, for a total consideration of $65.9 million, for all outstanding stock of Beeville and resulted in 100% ownership interest. The Company has recognized total goodwill of $25.8 million which is calculated as the excess of both the consideration exchanged and liabilities assumed compared to the fair market value of identifiable assets acquired. The fair value of the consideration exchanged related to the Company’s common stock was calculated based upon the closing market price of the Company’s common The Company did not incur any expenses related to the acquisition for the three months and six months ended June 30, 2020. The Company incurred $1.2 million and $1.7 million of expenses related to the acquisition during the three and six months ended June 30, 2019, respectively. The Company did not identify any loans deemed purchased credit impaired at the acquisition date. Non-credit impaired loans had a fair value of $296.4 million at the acquisition date and contractual balance of $298.9 million. As of the acquisition date, the Company expects that an insignificant amount of the contractual balance of these loans will be uncollectible. The difference of $2.5 million will be recognized into interest income as an adjustment to yield over the life of the loans. Estimated fair values of the assets acquired and liabilities assumed in this transaction as of the closing date are as follows: Assets of acquired bank (Dollars in thousands): Cash and cash equivalents $ 60,491 Securities available for sale 57,206 Loans held for investment 296,397 Premises and equipment 5,184 Other real estate owned 1,359 Goodwill 25,848 Core deposit intangible 5,695 Other assets 12,618 Total assets acquired $ 464,798 Liabilities of acquired bank: Deposits $ 398,427 Other liabilities 515 Total liabilities assumed $ 398,942 Common stock issued at $21.20 per share $ 33,479 Cash paid $ 32,377 As of March 31, 2020, management has completed evaluating the fair values of all assets acquired and liabilities assumed in the Beeville acquisition. Chandler Bancorp Inc. On November 5, 2019, the Company completed its acquisition of Chandler Bancorp Inc. and its subsidiary, Citizens State Bank. This transaction resulted in adding seven additional branches in the Northeast Texas region. The Company issued 2,100,000 shares of its common stock as well as a net cash payment to Citizens shareholders of $17.9 million, for total consideration of $62.5 million for all outstanding stock of Citizens. The Company has recognized total goodwill of $22.4 million which is calculated as the excess of both the consideration exchanged and liabilities assumed compared to the fair market value of identifiable assets acquired. The fair value of the consideration exchanged related to the Company’s common stock was calculated based upon the closing market price of the Company’s common stock as of November 5, 2019. None of the goodwill recognized is expected to be deductible for income tax purposes. The Company incurred expenses related to the Citizens acquisition of approximately $69 thousand and $1.2 million for the three and six months ended June 30, 2020, respectively, which are included in noninterest expense in the consolidated statements of income. The Company did not incur any expenses related to the acquisition for the three or six months ended June 30, 2019. The Company reviewed the Citizens loan portfolio for potential impairment and identified loans with a contractual balance of $3.2 million that were deemed purchased credit impaired. Non-credit impaired loans had a preliminary fair value of $248.8 million at the acquisition date and contractual balance of $253.1 million. As of the acquisition date, the Company expects that an insignificant amount of the contractual balance of these loans will be uncollectible. The difference of $1.1 million will be recognized into interest income as an adjustment to yield over the life of the loans. Estimated fair values of the assets acquired and liabilities assumed in the Citizens acquisition as of the closing date are as follows: Assets of acquired bank (Dollars in thousands): Cash and cash equivalents $ 84,240 Loans held for investment 252,037 Premises and equipment 10,849 Goodwill 22,409 Core deposit intangible 850 Other assets 3,247 Total assets acquired $ 373,632 Liabilities of acquired bank: Deposits $ 271,742 FHLB Borrowings $ 38,242 Other liabilities 1,142 Total liabilities assumed $ 311,126 Common stock issued at $21.20 per share $ 44,604 Cash paid $ 17,902 As of June 30, 2020, management is still evaluating the fair values of other assets and other liabilities shown in the table above. There were no measurement period adjustments recorded during the three months ended June 30, 2020. Measurement period adjustments recorded during the six months ended June 30, 2020 include a $1.7 million adjustment to the loan discount, $262 thousand adjustment to premises and equipment, $296 thousand adjustment to other assets, and $217 thousand adjustment to other liabilities. Revenues and earnings of Citizens for the three months ended June 30, 2020 were $3.5 million and $2.6 million, respectively. Revenues and earnings of Citizens for the six months ended June 30, 2020 were $7.4 million and $4.8 million, respectively. Simmons Branch Acquisition On February 28, 2020, the Company completed its acquisition of certain assets and assumption of certain liabilities associated with five branch offices of Simmons Bank (the “Simmons acquisition”). The offices are located in Austin, San Antonio and Tilden, Texas. The Company paid total cash for the purchase of $131.6 million. The Company has recognized total goodwill of $11.5 million which is calculated as the excess of both the consideration exchanged and liabilities assumed compared to the fair market value of identifiable assets acquired. Goodwill recognized is expected to be deductible for income tax purposes and will be amortized over 15 years. The Company did not incur any expenses related to the Simmons branch acquisition for the three months ended June 30, 2020. The Company incurred expenses of approximately $441 thousand for the six months ended June 30, 2020 which are included in noninterest expense in the consolidated statements of income. The Company did not incur any expenses related to the acquisition for the three or six months ended June 30, 2019. The Company did not identify any loans deemed purchased credit impaired at the acquisition date. Non-credit impaired loans had a preliminary fair value of $255.5 million at the acquisition date and contractual balance of $260.3 million. As of the acquisition date, the Company expects that an insignificant amount of the contractual balance of these loans will be uncollectible. The difference of $4.8 million will be recognized into interest income as an adjustment to yield over the life of the loans. Estimated fair values of the assets acquired and liabilities assumed in the Simmons acquisition as of the closing date are as follows: Assets of acquired bank (Dollars in thousands): Cash and cash equivalents $ 418 Loans held for investment 255,455 Premises and equipment 2,195 Goodwill 11,456 Core deposit intangible 10 Other assets 1,756 Total assets acquired $ 271,290 Liabilities of acquired bank: Deposits $ 139,672 Other liabilities 47 Total liabilities assumed $ 139,719 Cash paid $ 131,571 As of June 30, 2020, management has completed evaluating the fair values of all assets acquired and liabilities assumed in the Simmons branch acquisition. Measurement period adjustments recorded during the six months ended June 30, 2020 include a $1.0 million adjustment to other assets. Revenues and earnings of the Simmons branches since the acquisition date have not been disclosed as these branches were merged into the Company during 2020.

Investment Securities

Investment Securities	6 Months Ended
	Jun. 30, 2020
Investments Debt And Equity Securities [Abstract]
Investment Securities	NOTE 4. 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 June 30, 2020 Cost Gains Losses Value (Dollars in thousands) Available for sale: U.S. Treasury securities $ 57,523 $ 180 $ 1 $ 57,702 State and municipal obligations 7,222 185 — 7,407 Residential mortgage-backed securities 24,532 1,237 — 25,769 Total available for sale $ 89,277 $ 1,602 $ 1 $ 90,878 Amortized Unrealized Fair December 31, 2019 Cost Gains Losses Value (Dollars in thousands) Available for sale: U.S. Treasury securities $ 60,315 $ 71 $ 15 $ 60,371 State and municipal obligations 7,861 120 — 7,981 Residential mortgage-backed securities 27,922 664 1 28,585 Total available for sale $ 96,098 $ 855 $ 16 $ 96,937 Taxable interest and dividends on investment securities were $419 thousand and $1.1 million for the three months ended June 30, 2020 and 2019, respectively. Tax-exempt interest and dividends on investment securities were $38 thousand and $163 thousand for the three months ended June 30, 2020 and 2019, respectively. Taxable interest and dividends on investment securities were $884 thousand and $2.2 million for the six months ended June 30, 2020 and 2019, respectively. Tax-exempt interest and dividends on investment securities were $77 thousand and $271 thousand for the six months ended June 30, 2020 and 2019, respectively. There were $62.8 million and $90.6 million of securities pledged to collateralize public funds at June 30, 2020 The amortized cost and estimated fair value of securities available for sale, by contractual maturity, are as follows for the period presented: Amortized Fair June 30, 2020 Cost Value (Dollars in thousands) Available for sale: Due in one year or less $ 59,458 $ 59,654 Due after one year through five years 5,097 5,230 Due after five years through ten years 76 87 Due after ten years 114 138 Residential mortgage-backed securities 24,532 25,769 Total available for sale $ 89,277 $ 90,878 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 June 30, 2020 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss (Dollars in thousands) Available for sale: U.S. Treasury securities $ 33,995 $ 1 $ — $ — $ 33,995 $ 1 State and municipal obligations — — — — — — Residential mortgage-backed securities — — — — — — Total available for sale $ 33,995 $ 1 $ — $ — $ 33,995 $ 1 Less than 12 Months 12 Months or More Total December 31, 2019 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss (Dollars in thousands) Available for sale: U.S. Treasury securities $ 30,762 $ 15 $ — $ — $ 30,762 $ 15 State and municipal obligations — — — — — — Residential mortgage-backed securities — — 481 1 481 1 Total available for sale $ 30,762 $ 15 $ 481 $ 1 $ 31,243 $ 16 At June 30, 2020, the Company’s securities portfolio consisted of 91 securities, five of which were in an unrealized loss position. None of the five securities in an unrealized loss position at June 30, 2020 were in an unrealized loss position for more 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 June 30, 2020. The following describes the basis under which the Company has evaluated OTTI: U.S. Treasury Securities , and Residential Mortgage-Backed Securities (“MBS”): The unrealized losses associated with U.S. Treasury securities, 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. There were no securities sold for the three or six months ended June 30, 2020. Sales proceeds from the sale of available for sale securities for the three and six months ended June 30, 2019 were $34.7 million and $79.9 million, respectively, which resulted in gross realized gains of $1.1 million and $2.1 million, respectively.

Loans, Net

Loans, Net	6 Months Ended
	Jun. 30, 2020
Receivables [Abstract]
Loans, Net	NOTE 5. LOANS, NET Loans, net consisted of the following at June 30, 2020 and December 31, 2019: June 30, 2020 Acquired Loans (1) Organic Loans Total Loans (Dollars in thousands) Commercial and industrial loans (2) $ 83,678 $ 633,602 $ 717,280 Real estate: 1-4 single family residential loans 118,925 253,520 372,445 Construction, land and development 155,131 234,937 390,068 Commercial real estate loans (including multifamily) 372,760 470,488 843,248 Consumer loans and leases 9,625 9,534 19,159 Municipal and other loans 15,832 69,260 85,092 Total loans held in portfolio (3) $ 755,951 $ 1,671,341 $ 2,427,292 Allowance for loan losses — (9,905 ) (9,905 ) Loans held in portfolio, net $ 755,951 $ 1,661,436 $ 2,417,387 December 31, 2019 Acquired Loans (1) Organic Loans Total Loans (Dollars in thousands) Commercial and industrial loans (2) $ 46,842 $ 236,107 $ 282,949 Real estate: 1-4 single family residential loans 118,669 257,074 375,743 Construction, land and development 58,054 201,330 259,384 Commercial real estate loans (including multifamily) 332,476 421,336 753,812 Consumer loans and leases 11,351 11,418 22,769 Municipal and other loans 13,709 58,816 72,525 Total loans held in portfolio (3) $ 581,101 $ 1,186,081 $ 1,767,182 Allowance for loan losses — (6,737 ) (6,737 ) Loans held in portfolio, net $ 581,101 $ 1,179,344 $ 1,760,445 (1) Acquired loans in 2020 include loans acquired in the Comanche, Beeville, Citizens, and Simmons acquisitions. Acquired loans in 2019 include loans acquired in the Comanche, Beeville, and Citizens acquisitions. All loans originated after acquisition close date are included in organic loans. (2 ) Organic loans balance includes $75.1 million and $74.2 million of the unguaranteed portion of U.S. Small Business Administration (“SBA”) loans as of June 30, 2020 and December 31, 2019, respectively. (3 ) Organic loans balance includes $(13.1) million and $(4.2) million of deferred fees, cost, premium and discount as of June 30, 2020 and December 31, 2019, respectively. At June 30, 2020 and December 31, 2019, the Company had pledged loans as collateral for Federal Home Loan Bank (“FHLB”) advances of $794.6 million and $668.5 million, respectively. Additionally, at June 30, 2020, the Company had pledged loans as collateral associated with the Paycheck Protection Program Liquidity Facility (“PPPLF”) of $94.8 million. There were no loans pledged under the PPPLF at December 31, 2019. There were no recorded investments of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process as of June 30, 2020 and December 31, 2019. 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 June 30, 2020 and 2019, the Company sold approximately $4.5 million and $16.4 million, respectively, in SBA loans to third parties. The loan sales resulted in realized gains of $326 thousand and $1.4 million for the three months ended June 30, 2020 and 2019, respectively. During the six months ended June 30, 2020 and 2019, the Company sold approximately $ 10.1 million and $ 26.5 million, respectively, in SBA loans to third parties. The loan sales resulted in realized gains of $ 790 thousand and $ 2.2 million for the six months ended June 30, 2020 and 2019, respectively. In April 2020, we began originating loans to qualified small businesses under the PPP administered by the SBA under the provisions of the CARES Act. Total PPP loans at June 30, 2020 were $428 million and are included in Commercial and industrial loans. These loans are fully guaranteed by the SBA, carry a contractual term of two to five years and an interest rate of 1.00%. In conjunction with originating PPP loans, the Company recorded deferred origination costs of $4.9 million and deferred origination fees of $15.3 million. In conjunction with the PPP, we are also currently participating in the Federal Reserve's PPP Facility which, through September 30, 2020, will extend loans to banks who are loaning money to small businesses under the PPP. The amount outstanding at June 30, 2020, was $94.9 million and is non-recourse and secured by the amount of the PPP loans we originate. The maturity date of a borrowing under the PPP Facility is equal the maturity date of the PPP loan pledged to secure the borrowing and would be accelerated (i) if the underlying PPP loan goes into default and is sold to the SBA to realize on the SBA guarantee or (ii) to the extent that any loan forgiveness reimbursement is received from the SBA. Borrowings under the PPP Facility are included in long-term liabilities on the consolidated balance sheet and bear interest at a rate of 0.35%. Due to the rights retained on certain loan participations sold, the Company is deemed to have retained effective control over these loans under ASC 860, “Transfers and Servicing.” These loans can no longer be reported as sold, and must be reported on the balance sheet as loans held for investment regardless of whether the Company intends to exercise its rights. These loans are reported as loans held for investment with the offsetting liability recorded as long-term borrowings. The amount of secured borrowings included in loans held for investment and long-term borrowings at June 30, 2020 and December 31, 2019 was $13.3 million and $14.7 million, respectively. Loans serviced for others are not included in the accompanying balance sheets. The unpaid principal balances of loans serviced for others, including SBA loans, were $198.5 million and $205.0 million at June 30, 2020 and December 31, 2019, respectively. 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 for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 (Dollars in thousands) Principal outstanding, beginning of year $ 7,447 $ 93 $ 6,005 $ 107 Additions (reductions) of affiliations — 2,352 — 2,352 New loans made in current year 1,130 — 2,849 — Repayments (1,649 ) (12 ) (1,926 ) (26 ) Principal outstanding, end of year $ 6,928 $ 2,433 $ 6,928 $ 2,433 There were $772 thousand in unfunded commitments to related parties at June 30, 2020. There were $861 thousand in unfunded commitments to related parties at December 31, 2019.

Allowance for Loan and Lease Lo

Allowance for Loan and Lease Losses	6 Months Ended
	Jun. 30, 2020
Receivables [Abstract]
Allowance for Loan and Lease Losses	NOTE 6. 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. On April 2, 2019, the Company closed its acquisition of Beeville. At the date of acquisition, Beeville had $298.9 million in loans. In accordance with ASC 805, “Business Combinations,” the Company utilized a third party to value the loan portfolio as of the acquisition date. Based upon the third-party valuation, the fair value of the loans was approximately $296.4 million at the acquisition date. The overall discount calculated was $2.5 million and will be accreted into interest income over the life of the loans. On November 5, 2019, the Company closed its acquisition of Citizens. At the date of acquisition, Citizens had loans with a contractual balance of $253.1 million. In accordance with ASC 805, “Business Combinations,” the Company utilized a third party to value the loan portfolio as of the acquisition date. Based upon the third-party valuation, the preliminary fair value of non-purchased credit impaired loans was approximately $248.8 million at the acquisition date. Purchased credit impaired loans had a fair value of $3.2 million. The overall discount calculated was $1.1 million and will be accreted into interest income over the life of the loans. On February 28, 2020, the Company closed its acquisition of certain assets and assumption of certain liabilities associated with five offices of Simmons Bank. At the date of acquisition, the offices had $260.3 million in loans. In accordance with ASC 805, “Business Combinations,” the Company utilized a third party to value the loan portfolio as of the acquisition date. Based upon the third-party valuation, the fair value of the loans was approximately $255.5 million at the acquisition date. The overall discount calculated was $4.8 million and will be accreted into interest income over the life of the loans. As of June 30, 2020, all purchased loans were excluded from the allowance for loan and lease losses calculation. To determine if the portfolio had experienced greater than anticipated deterioration between the acquisition date and June 30, 2020, the Bank evaluated each of the purchased loan portfolios. The evaluation consisted of analysing the purchased loan portfolio utilizing the current allowance for loan and lease losses model. The model did not indicate the need for an additional allowance on any of the portfolios. At June 30, 2020, purchased credit impaired loans related to the Comanche acquisition remain insignificant, and the Bank did not identify any purchased credit impaired loans related to the Beeville or Simmons acquisitions. Remaining recorded investment in purchased credit impaired loans related to the Citizens acquisition was $580 thousand at June 30, 2020 and the Company believes that all contractual principal and interest will be received. Purchased credit impaired loans related to the Citizens acquisition are not included in the impaired loans disclosure within this Note. At June 30, 2020 no provision for loan losses has been recorded for Paycheck Protection Loans. These loans are fully guaranteed by the U.S. Federal Government and therefore carry a zero percent reserve. PPP loans also carry a put-back provision in the event that a loan is fraudulently originated and the Bank is at fault. Management does not deem a put-back reserve necessary at this time. The following tables present information related to allowance for loan and lease losses for the periods presented: Allowance Rollforward Three Months Ended June 30, 2020 Beginning Balance Charge-offs Recoveries Provision Ending Balance (Dollars in thousands) Commercial and industrial loans $ 4,484 $ (455 ) $ 5 $ 2,279 $ 6,313 Real estate: 1-4 single family residential loans 35 — — 72 107 Construction, land and development loans 1,293 — — (35 ) 1,258 Commercial real estate loans (including multifamily) 1,749 — — 414 2,163 Consumer loans and leases 51 (107 ) 2 103 49 Municipal and other loans 8 — 2 5 15 Ending allowance balance $ 7,620 $ (562 ) $ 9 $ 2,838 $ 9,905 Allowance Rollforward Three Months Ended June 30, 2019 Beginning Balance Charge-offs Recoveries Provision Ending Balance (Dollars in thousands) Commercial and industrial loans $ 4,661 $ (643 ) $ 31 $ 168 $ 4,217 Real estate: 1-4 single family residential loans 34 — — (2 ) 32 Construction, land and development loans 749 — — 45 794 Commercial real estate loans (including multifamily) 1,057 — — 134 1,191 Consumer loans and leases 57 (16 ) 3 (9 ) 35 Municipal and other loans 11 — 1 (4 ) 8 Ending allowance balance $ 6,569 $ (659 ) $ 35 $ 332 $ 6,277 Allowance Rollforward Six Months Ended June 30, 2020 Beginning Balance Charge-offs Recoveries Provision Ending Balance (Dollars in thousands) Commercial and industrial loans $ 4,078 $ (709 ) $ 9 $ 2,935 $ 6,313 Real estate: 1-4 single family residential loans 31 — — 76 107 Construction, land and development loans 1,055 — — 203 1,258 Commercial real estate loans (including multifamily) 1,451 — — 712 2,163 Consumer loans and leases 68 (159 ) 14 126 49 Municipal and other loans 54 — 4 (43 ) 15 Ending allowance balance $ 6,737 $ (868 ) $ 27 $ 4,009 $ 9,905 Allowance Rollforward Six Months Ended June 30, 2019 Beginning Balance Charge-offs Recoveries Provision Ending Balance (Dollars in thousands) Commercial and industrial loans $ 4,453 $ (1,221 ) $ 59 $ 926 $ 4,217 Real estate: 1-4 single family residential loans 59 — — (27 ) 32 Construction, land and development loans 731 — — 63 794 Commercial real estate loans (including multifamily) 960 — — 231 1,191 Consumer loans and leases 80 (34 ) 5 (16 ) 35 Municipal and other loans 3 — 1 4 8 Ending allowance balance $ 6,286 $ (1,255 ) $ 65 $ 1,181 $ 6,277 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 for the periods presented: Accruing June 30, 2020 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 $ 713,359 $ 264 $ - $ 192 $ 3,465 $ 717,280 Real estate: 1-4 single family residential loans 370,187 810 48 — 1,400 372,445 Construction, land and development 389,852 — — — 216 390,068 Commercial real estate loans (including multifamily) 840,656 332 — — 2,260 843,248 Consumer loans and leases 19,073 59 16 — 11 19,159 Municipal and other loans 85,080 — 12 — — 85,092 Total loans $ 2,418,207 $ 1,465 $ 76 $ 192 $ 7,352 $ 2,427,292 Accruing December 31, 2019 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 $ 278,922 $ 760 $ 688 $ - $ 2,579 $ 282,949 Real estate: 1-4 single family residential loans 372,828 1,018 — — 1,897 375,743 Construction, land and development 258,497 671 — — 216 259,384 Commercial real estate loans (including multifamily) 750,432 1,283 404 — 1,693 753,812 Consumer loans and leases 22,663 27 3 2 74 22,769 Municipal and other loans 72,525 — — — — 72,525 Total loans $ 1,755,867 $ 3,759 $ 1,095 $ 2 $ 6,459 $ 1,767,182 There was one loan 90 days or more past due and still accruing at June 30, 2020 with a recorded investment of $192 thousand. There was one loan 90 days or more past due and still accruing at December 31, 2019 with a recorded investment of $2 thousand. All loans with active deferral periods related to COVID-19 are excluded from nonaccrual and days past due reporting. At June 30, 2020, non-accrual loans that were 30 to 59 days past due were $618 thousand, non-accrual loans that were 60 to 89 days past due were $53 thousand, and non-accrual loans that were 90 days or more past due were $3.4 million. At December 31, 2019, non-accrual loans that were 30 to 59 days past due were $ 308 thousand, non-accrual loans that were 60 to 89 days past due were $ 1.2 million , and non-accrual loans that were 90 days or more past due were $ million . 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 tables summarize the Company’s loans by key indicators of credit quality for the periods presented: June 30, 2020 Pass Special Mention Substandard Doubtful (Dollars in thousands) Commercial and industrial loans $ 698,525 $ 2,311 $ 16,443 $ 1 Real estate: 1-4 single family residential loans 368,765 646 3,034 — Construction, land and development 385,121 4,731 216 — Commercial real estate loans (including multifamily) 826,470 4,956 11,822 — Consumer loans and leases 19,116 16 27 — Municipal and other loans 81,983 3,082 27 — Total loans $ 2,379,980 $ 15,742 $ 31,569 $ 1 December 31, 2019 Pass Special Mention Substandard Doubtful (Dollars in thousands) Commercial and industrial loans $ 266,688 $ 1,905 $ 14,355 $ 1 Real estate: 1-4 single family residential loans 372,190 893 2,660 — Construction, land and development 258,864 304 216 — Commercial real estate loans (including multifamily) 734,757 5,312 13,743 — Consumer loans and leases 22,632 — 137 — Municipal and other loans 72,134 — 391 — Total loans $ 1,727,265 $ 8,414 $ 31,502 $ 1 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 tables show the Company’s investment in loans disaggregated based on the method of evaluating impairment for the periods presented: Loans - Recorded Investment Allowance for Credit Loss June 30, 2020 Individually Evaluated for Impairment Collectively Evaluated for Impairment Individually Evaluated for Impairment Collectively Evaluated for Impairment (Dollars in thousands) Commercial and industrial loans $ 3,519 $ 713,761 $ 2,514 $ 3,799 Real estate: 1-4 single family residential loans 1,540 370,905 71 36 Construction, land and development 216 389,852 — 1,258 Commercial real estate loans (including multifamily) 2,260 840,988 — 2,163 Consumer loans and leases 11 19,148 — 49 Municipal and other loans — 85,092 — 15 Total loans $ 7,546 $ 2,419,746 $ 2,585 $ 7,320 Loans - Recorded Investment Allowance for Credit Loss December 31, 2019 Individually Evaluated for Impairment Collectively Evaluated for Impairment Individually Evaluated for Impairment Collectively Evaluated for Impairment (Dollars in thousands) Commercial and industrial loans $ 2,508 $ 280,441 $ 1,422 $ 2,657 Real estate: 1-4 single family residential loans 1,988 373,755 3 28 Construction, land and development 216 259,168 — 1,055 Commercial real estate loans (including multifamily) 1,571 752,241 — 1,451 Consumer loans and leases 24 22,745 19 48 Municipal and other loans — 72,525 — 54 Total loans $ 6,307 $ 1,760,875 $ 1,444 $ 5,293 The following tables set forth certain information regarding the Company’s impaired loans that were evaluated for specific reserves for the periods presented: Impaired Loans - With Allowance Impaired Loans - With no Allowance June 30, 2020 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance (Dollars in thousands) Commercial and industrial loans $ 3,215 $ 3,220 $ 2,514 $ 304 $ 215 Real estate: 1-4 single family residential loans 316 315 71 1,224 1,156 Construction, land and development — — — 216 214 Commercial real estate loans (including multifamily) — — — 2,260 275 Consumer loans and leases — — — 11 — Municipal and other loans — — — — — Total loans $ 3,531 $ 3,535 $ 2,585 $ 4,015 $ 1,860 Impaired Loans - With Allowance Impaired Loans - With no Allowance December 31, 2019 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance (Dollars in thousands) Commercial and industrial loans $ 2,150 $ 2,168 $ 1,422 $ 358 $ 360 Real estate: 1-4 single family residential loans 12 12 3 1,976 1,965 Construction, land and development — — — 216 214 Commercial real estate loans (including multifamily) — — — 1,571 1,571 Consumer loans and leases 24 24 19 — — Municipal and other loans — — — — — Total loans $ 2,186 $ 2,204 $ 1,444 $ 4,121 $ 4,110 Three Months Ended June 30, 2020 2019 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in thousands) Commercial and industrial loans $ 3,590 $ — $ 3,691 $ — Real estate: 1-4 single family residential loans 1,547 — 1,282 — Construction, land and development 216 — 220 — Commercial real estate loans (including multifamily) 2,232 — 243 — Consumer loans and leases 11 — 16 — Municipal and other loans — — — — Total loans $ 7,596 $ — $ 5,452 $ — Troubled Debt Restructurings: The following table provides a summary of troubled debt restructurings (“TDRs”) based upon delinquency status, all of which are considered impaired, for the periods presented: June 30, 2020 December 31, 2019 Number of contracts Recorded Investment Number of contracts Recorded Investment (Dollars in thousands) Performing TDRs: Commercial and industrial loans 2 $ 55 2 $ 58 Real estate: 1-4 single family residential loans 3 140 3 151 Construction, land and development — — — — Commercial real estate loans (including multifamily) — — — — Consumer loans and leases — — — — Municipal and other loans — — — — Total performing TDRs 5 195 5 209 Nonperforming TDRs 13 543 5 198 Total TDRs 18 $ 738 10 $ 407 Allowance attributable to TDRs $ 422 $ 113 The following tables summarize TDRs, and includes newly designated TDRs as well as modifications made to existing TDRs, for the periods presented. 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. The CARES Act includes a provision for the Company to opt out of applying the TDR accounting guidance in ASC 310-40 for certain loan modifications. Loan modifications made between March 1, 2020 and the earlier of i) December 30, 2020 or ii) 60 days after the President declares a termination of the COVID-19 national emergency are eligible for this relief if the related loans were not more than 30 days past due as of December 31, 2019. As of June 30, 2020, 1,216 qualified loans had been granted 90 day deferrals or interest only payment periods of 90 days with an unpaid principal balance of $520.6 million. Three Months Ended June 30, 2020 2019 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 1 $ 276 $ 276 $ 276 4 $ 145 $ 139 $ 113 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 — — — — — — — — There have been no defaults of troubled debt restructurings that took place within the three or six months ended June 30, 2020 and 2019.

Goodwill and Intangibles

Goodwill and Intangibles	6 Months Ended
	Jun. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangibles	NOTE 7. GOODWILL AND INTANGIBLES Goodwill and other intangible assets are presented in the table below. As of June 30, 2020, we evaluated recent events to determine if a triggering event has occurred. Management determined that the economic disruption and uncertainty surrounding the COVID-19 pandemic does constitute a triggering event and a Step 1 Goodwill analysis was deemed necessary. The Step 1 analysis performed included utilizing the discounted cash flow and market approaches and based on our evaluation, we concluded that our goodwill was not more than likely impaired as of that date. Six Months Ended June 30, 2020 Year Ended December 31, 2019 (Dollars in thousands) Beginning goodwill $ 68,503 $ 18,253 Arising from business combination 11,456 50,250 Measurement Period Adjustments (1,993 ) Ending goodwill $ 77,966 $ 68,503 Core deposit intangible 19,712 19,712 Arising from business combination 10 — Less: Accumulated amortization (10,105 ) (8,240 ) Core deposit intangible, net $ 9,617 $ 11,472 Amortization expense for core deposit intangibles for the three months ended June 30, 2020 and 2019 totaled $919 thousand and $1.0 million, respectively. Amortization expense for core deposit intangibles for the six months ended June 30, 2020 and 2019 totaled The estimated amount of amortization expense for core deposit intangibles to be recognized over the next five fiscal years is as follows: Type of intangibles Remainder of 2020 2021 2022 2023 2024 2025 (Dollars in thousands) Core deposit intangible $ 1,799 $ 3,028 $ 2,212 $ 1,499 $ 744 $ 200

SBA Servicing Asset

SBA Servicing Asset	6 Months Ended
	Jun. 30, 2020
Transfers And Servicing Of Financial Assets [Abstract]
SBA Servicing Asset	NOTE 8. 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 SBA loans serviced for others were $198.5 million and $205.0 million at June, 2020 and December 31, 2019, respectively. SBA loan servicing fees were $256 thousand and $40 thousand for the three months ended June 30, 2020 and 2019, respectively. SBA loan servicing fees were $266 thousand and $304 thousand for the six months ended June 30, 2020 and 2019, 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 six months ended June 30, 2020 and 2019: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 (Dollars in thousands) Beginning balance $ 3,055 $ 3,747 $ 3,355 $ 3,965 Origination of servicing assets 84 322 189 520 Change in fair value: Due to run-off (135 ) (239 ) (275 ) (404 ) Due to market changes 111 (260 ) (154 ) (511 ) Ending balance $ 3,115 $ 3,570 $ 3,115 $ 3,570

Deposits

Deposits	6 Months Ended
	Jun. 30, 2020
Deposits By Component Alternative [Abstract]
Deposits	NOTE 9. DEPOSITS The following table sets forth the Company’s deposits by category for the periods presented: June 30, 2020 December 31, 2019 (Dollars in thousands) Noninterest-bearing demand deposits $ 745,646 $ 444,822 Interest-bearing demand deposits 360,282 370,467 Interest-bearing NOW accounts 31,132 28,204 Savings and money market accounts 555,555 404,886 Time deposits 722,376 679,747 Total deposits $ 2,414,991 $ 1,928,126 Time deposits $100,000 and greater $ 585,709 $ 333,464 Time deposits $250,000 and greater 220,855 204,389 Related party deposits (executive officers and directors) 31,284 23,150 The aggregate amount of overdraft demand deposits reclassified to loans was $97 thousand and $129 thousand at June 30, 2020 and December 31, 2019, respectively. The aggregate amount of maturities for time deposits for each of the five years following the latest balance sheet date totaled $545.3 million, $137.7 million, $26.4 million, $6.3 million and $6.4 million, respectively. The Company held brokered certificates of deposit of $11.9 million and $6.0 million at June 30, 2020 and December 31, 2019, respectively.

Stock-Based Compensation and Ot

Stock-Based Compensation and Other Benefit Plans	6 Months Ended
	Jun. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation and Other Benefit Plans	NOTE 10. 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, 2020 898,572 $ - Granted — Exercised (34,500 ) $ 12.18 $ - Forfeited (1,300 ) $ 16.00 Expired — — Outstanding at June 30, 2020 862,772 $ 13.43 $ - 3.94 Vested and exercisable at June 30, 2020 810,072 $ 13.38 $ - 3.80 The total unrecognized compensation cost of $120 thousand related to the 2008 Stock Plan for the share awards outstanding at June 30, 2020 will be recognized over a weighted average remaining period of 0.96 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, 2020 199,447 $ 17.53 Granted — — — Exercised — — — Forfeited (1,733 ) 15 Expired — — Outstanding at June 30, 2020 197,714 $ 17.55 $ - 7.21 Vested and exercisable at June 30, 2020 97,828 $ 16.89 $ - 7.07 The total unrecognized compensation cost of $398 thousand related to the 2017 Stock Plan for the share awards outstanding at June 30, 2020 will be recognized over a weighted average remaining period of 2.54 years. 2017 Stock Plan – Restricted Stock Unit Awards On three different dates during the six-month period ended June 30, 2020, the Company granted a total of 78,997 restricted stock units to employees and directors that vest in full (i.e. cliff vesting) on the five year anniversary of the grant date. The fair value of the restricted stock units on the grant date was $826 thousand and will be recognized as compensation expense over the requisite vesting period ending on the respective five year anniversary of the restricted stock unit award’s grant date. The following table presents the activity during the period related to restricted stock units from the 2017 Stock Plan: 2017 Stock Plan Restricted Stock Unit Awards Shares Weighted Average Grant Date Fair Value Outstanding at January 1, 2020 59,280 $ 22.11 Granted 78,997 $ 10.45 Vested (8,715 ) 22.12 Forfeited (2,500 ) 21.20 Outstanding at June 30, 2020 127,062 $ 14.88 A summary of selected data related to stock-based compensation expense for the three months ended March 31, 2020 and 2019 are as follows: Restricted Stock Unit Awards June 30, 2020 2019 (Dollars in thousands) Stock-based compensation expense $ 473 $ — Unrecognized compensation expense related to stock-based compensation $ 1,611 $ — Weighted-average life over which expense is expected to be recognized (years) 4.46 — Warrants There was no activity during the three or six months ended June 30, 2020 on the Bank4Texas Warrants. There was no activity during the three or six months ended June 30, 2020 on the Oasis Warrants.

Basic and Diluted Earnings Per

Basic and Diluted Earnings Per Common Share	6 Months Ended
	Jun. 30, 2020
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Common Share	NOTE 11. BASIC AND DILUTED EARNINGS PER COMMON SHARE The following table presents the computation of basic and diluted earnings per share for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 (Dollars in thousands, except per share data) Net income available to common stockholders $ 7,694 $ 5,827 $ 11,768 $ 9,637 Weighted average number of common shares - basic 17,581,959 13,765,929 17,883,034 12,963,700 Effect of dilutive securities: Employee stock-based compensation awards and warrants 30,960 470,315 116,172 469,060 Weighted average number of common shares - diluted 17,612,919 14,236,244 17,999,206 13,432,760 Basic earnings per common share $ 0.44 $ 0.42 $ 0.66 $ 0.74 Diluted earnings per common share $ 0.44 $ 0.41 $ 0.65 $ 0.72 Anti-dilutive warrants and stock options — 9,350 — 1,850

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 12. INCOME TAXES The effective tax rates for the three months ended June 30, 2020 and 2019 were 20.5% and 20.9%, respectively. The effective tax rates for the six months ended June 30, 2020 and 2019 were 16.3% and 19.7%, respectively. The effective tax rate for the six months ended June 30, 2020 was favorably impacted by a discrete income tax benefit driven by the Company’s

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 13. 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 and for both periods ending June 30, 2020 and December 31, 2019, the Company’s reserve for unfunded commitments totaled $362 thousand and $98 thousand, respectively. 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 for the periods presented: June 30, 2020 December 31, 2019 (Dollars in thousands) Unfunded loan commitments $ 275,080 $ 243,568 Commercial and standby letters of credit 1,887 1,232 Total $ 276,967 $ 244,800 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.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE 14. 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 tables present the assets and liabilities measured at fair value on a recurring basis for the periods presented: June 30, 2020 Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets: U.S. Treasury securities $ 57,702 $ — $ — $ 57,702 State and municipal obligations — 7,407 — 7,407 Residential mortgage-backed securities — 25,769 — 25,769 SBA servicing rights — — 3,115 3,115 Total $ 57,702 $ 33,176 $ 3,115 $ 93,993 December 31, 2019 Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets: U.S. Treasury securities $ 60,371 $ - $ — $ 60,371 State and municipal obligations — 7,981 — 7,981 Residential mortgage-backed securities — 28,585 — 28,585 SBA servicing rights — — 3,355 3,355 Total $ 60,371 $ 36,566 $ 3,355 $ 100,292 There were no transfers of financial assets between levels of the fair value hierarchy during the three or six months ended June 30, 2020. 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 June 30, 2020 December 31, 2019 (Dollars in thousands) Assets (classified in Level 3): Impaired loans $ 4,374 $ 3,990 Other real estate and repossessed assets 3,743 3,653 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 June 30, 2020 Non-recurring: Impaired loans $ 4,374 Third party appraisals Collateral discounts 0.0% - 100.0% (44.7%) Other real estate owned 3,743 Third party appraisals Collateral discounts and estimated cost to sell 10.0 % Recurring: SBA servicing assets 3,115 Discounted cash flows Conditional prepayment rate 11.8 % Discount rate 10.0 % December 31, 2019 Non-recurring: Impaired loans $ 3,990 Third party appraisals Collateral discounts 0.0% - 100.0% (19.2%) Other real estate owned 3,653 Third party appraisals Collateral discounts and estimated cost to sell 10.0 % Recurring: SBA servicing assets 3,355 Discounted cash flows Conditional prepayment rate 11.8 % Discount rate 11.5 % 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 for the periods presented: June 30, 2020 Carrying Value Fair Value Level 1 Level 2 Level 3 (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 235,344 $ 235,344 $ 235,344 $ — $ — Time deposits in other banks — — — — — Available for sale securities 90,878 90,878 57,702 33,176 — FHLB and other bank stock 5,696 5,696 — 5,696 — Loans, net 2,417,387 2,391,732 — — 2,391,732 Loans held for sale 7,718 8,191 — 8,191 — Accrued interest receivable 12,188 12,188 — 12,188 — Bank-owned life insurance 15,787 15,787 — 15,787 — SBA servicing rights 3,115 3,115 — — 3,115 Financial Liabilities: Deposits $ 2,414,991 $ 2,389,569 $ — $ 2,389,569 $ — Accrued interest payable 1,025 1,025 — 1,025 — Short-term borrowings 10,000 9,600 — 10,000 — Long-term borrowings 183,076 175,753 — 175,753 — December 31, 2019 Carrying Value Fair Value Level 1 Level 2 Level 3 (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 325,957 $ 325,957 $ 325,957 $ — $ — Time deposits in other banks 490 490 Available for sale securities 96,937 96,937 — 96,937 — FHLB and other bank stock 8,310 8,310 — 8,310 — Loans, net 1,760,445 1,758,511 — — 1,758,511 Loans held for sale 3,989 4,307 — 4,307 — Accrued interest receivable 6,507 6,507 — 6,507 — Bank-owned life insurance 15,610 15,610 — 15,610 — SBA servicing rights 3,355 3,355 — — 3,355 Financial Liabilities: Deposits $ 1,928,126 $ 1,855,491 $ — $ 1,855,491 $ — Accrued interest payable 1,219 1,219 — 1,219 — Short-term borrowings — — — — — Long-term borrowings 105,140 102,488 — 102,488 — 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 June 30, 2020 and December 31, 2019, include cash and cash equivalents, time deposits in other banks and accrued interest receivable and payable.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	NOTE 15. SUBSEQUENT EVENTS On July 24, 2020 the Company issued $37 million aggregate principal amount of 6.00% fixed-to-floating rate subordinated notes due 2030 (“Notes”) to certain institutional accredited investors and qualified institutional buyers in a private placement. Spirit intends to use the net proceeds from this transaction for general business purposes, payment of existing indebtedness and potential future strategic opportunities. The Notes will initially bear interest at a fixed annual rate of 6.00%, payable quarterly, in arrears, to, but excluding, July 31, 2025. From and including July 31, 2025, to, but excluding, the maturity date or earlier redemption date, the interest rate will reset quarterly to an interest rate per annum equal to a benchmark rate, which is expected to be the (provided, that in the event the benchmark rate is less than zero, the benchmark rate will be deemed to be zero) plus 592 basis points, payable quarterly, in arrears. The Company is entitled to redeem the Notes, in whole or in part, on any interest payment date on or after July 31, 2025, and to redeem the Notes at any time in whole, but not in part, upon certain other specified events.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations Spirit of Texas Bancshares, Inc. (“Spirit,” “STXB” or the “Company”) is a bank holding company headquartered in Conroe, Texas that provides, through its bank subsidiary, Spirit of Texas Bank, SSB (the “Bank”), a variety of financial services to individuals and corporate customers located largely in the State of Texas, and which customers are primarily involved in agricultural, light industrial and commercial arenas.
Risks and Uncertainties	Risks and Uncertainties COVID-19 Pandemic In December 2019, a novel strain of coronavirus (“COVID-19”) was reported to have surfaced in Wuhan, China, and has since spread to a number of other countries, including the United States. In March 2020, the World Health Organization declared COVID-19 a global pandemic and the United States declared a National Public Health Emergency. The COVID-19 pandemic has severely impacted the level of economic activity in the local, national and global economies and financial markets. During the first and second quarters, many businesses in Texas and many other states temporarily closed due to social distancing and/or shelter in place orders. While many of these businesses have since been allowed to re-open, the Company and its customers continue to be adversely affected by the COVID-19 pandemic. The extent to which the COVID-19 pandemic negatively impacts the Company's business, results of operations, and financial condition, as well as its regulatory capital and liquidity ratios, is unknown at this time and will depend on future developments, including the scope and duration of the pandemic and actions taken by governmental authorities and other third parties in response to the pandemic. If the pandemic is sustained, it may further adversely impact the Company and impair the ability of the Company's customers to fulfill their contractual obligations to the Company. This could cause the Company to experience a material adverse effect on its business operations, asset valuations, financial condition, and results of operations. For additional risks related to the COVID-19 pandemic, see “Risk Factors” in this Form 10-Q, the Company’s Annual Report on Form 10-K for the year ended December 31, 2019, Quarterly Report on Form 10-Q for the period ended March 31, 2020 and other filings with the Securities and Exchange Commission (the “SEC”). In response to the pandemic, the President of the United States signed into law the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”). This legislation aims at providing relief for individuals and businesses that have been negatively impacted by the coronavirus pandemic. The CARES Act includes a provision for the Company to opt out of applying the “troubled debt restructuring” (“TDR”) accounting guidance in ASC 310-40 for certain loan modifications. Loan modifications made between March 1, 2020 and the earlier of i) December 30, 2020 or ii) 60 days after the President declares a termination of the COVID-19 national emergency are eligible for this relief if the related loans were not more than 30 days past due as of December 31, 2019. The Bank adopted this provision. Additionally, the CARES Act contains provisions that impact federal income taxes including but not limited to an extension to pay and file federal tax returns, bonus depreciation on qualified improvement property and the ability to carry back certain net operating losses to a prior year. The Bank will utilize the filing and payment extension and net operating loss carryback provisions.
Basis of Presentation	Basis of Presentation The consolidated financial statements include the accounts of the Company and the accounts of its wholly-owned subsidiary, 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 10 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 June 30, 2020 are not necessarily indicative of the results that may be expected for the year ending December 31, 2020 and should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2019 previously filed with the SEC in the Company’s Annual Report on Form 10-K 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.
Correction of an Immaterial Error on the Consolidated Balance Sheet	Correction of an Immaterial Error on the Consolidated Balance Sheet and Cash Flow The Company identified an immaterial error pertaining to the accounting of certain loan participations sold impacting its consolidated balance sheet and its consolidated statement of cash flows for the six months ended June 30, 2019. Due to the rights retained on certain loan participations sold, the Company is deemed to have retained effective control over these loans under Financial Accounting Standards Board (“FASB”)’s Accounting Standards Codification (“ASC”) Topic 860, “Transfers and Servicing”, and therefore these participations sold must be accounted for as a secured borrowing. The Company reviewed the impact of this error on the prior periods and determined that the error was not material to the prior period consolidated financial statements. The Company has corrected the immaterial error in
Accounting Policies Recently Adopted and Pending Accounting Pronouncements	Accounting Policies Recently Adopted and Pending Accounting Pronouncements ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting” – Issued in March 2020, Accounting Standards Update (“ASU”) No. 2020-04 provides optional expedients and exceptions for accounting related to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. ASU 2020-04 applies only to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform and do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. ASU 2020-04 was effective upon issuance and generally can be applied through December 31, 2022. The adoption of ASU 2020-04 did not significantly impact the Company’s consolidated financial statements. ASU 2019-11, “Financial Instruments-Credit Losses: Codification Improvements Topic 326” – Issued in November 2019, ASU No. 2019-11 clarifies and addresses specific issues about certain aspects of the amendments in ASU 2016-13. For the Company, the provisions of this ASU are effective for fiscal years beginning after December 15, 2022 including interim periods within those fiscal years. See the discussions regarding the adoption of ASU 2016-13 below. ASU 2019-10, “Financial Instruments-Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842)” – Issued in November 2019, ASU No. 2019-10 addresses the change in philosophy to the effective dates including amendments issued after the issuance of the original ASUs. See the discussions regarding the adoption of ASU 2016-13 and ASU 2016-02 below. ASU 2019-04, “Codification Improvements to Topic 326, Financial Instruments-Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments” – Issued in April 2019, ASU No. 2019-04 clarifies a number of issues discussed at the June 2018 and November 2018 Credit Losses Transition Resource Group meetings. The clarifications address a variety of identified issues including but not limited to the treatment of accrued interest receivable as it relates to the allowance for credit losses, transfers between loan classifications and categories, recoveries, and using projections of future interest rate environments in expected cash flow calculations. Management is evaluating these clarifications concurrently with our assessment of ASU 2016-13. 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 adopted the provisions of this ASU removing fair value disclosure requirements as of December 31, 2018 as early adoption of the removal provisions was allowed and adopted the remaining provisions of the ASU as of January 1, 2020. The provisions of this ASU did not have a material impact on the Company’s consolidated financial statements. 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 adopted all amendments of ASU 2018-09 as of January 1, 2020. Adoption of the amendments did not 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 adopt ed this ASU using the public company effective date as early adoption is permitted . The adoption of ASU 2017-04 did not have a material impact on the Company’s consolidated financial statements. 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 were originally 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. Issued in November 2019, ASU 2019-10, “ ” alters the effective date of ASU 2016-13 for private companies. Under the provisions of ASU 2019-10, ASU 2016-13 is now effective for fiscal years beginning after December 15, 2022 including interim periods within those years for non-public business entities. Earlier application is permitted for interim and annual periods beginning after December 15, 2018. Management has elected to adopt this ASU using the updated 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. In December 2018, the FASB further issued ASU 2018-20, Leases (Topic 842) Narrow-Scope Improvements for Lessors . The amendments in this update permits lessors to make an accounting policy election to not evaluate whether certain sales taxes and other similar taxes are lessor costs or lessee costs and instead account for the costs as if they were lessee costs. Additionally, the amendment requires lessors to exclude from variable payments, and therefore revenue, lessor costs paid by lessees directly to third parties. The amendments also require lessors to account for costs excluded from the consideration of a contract that are paid by the lessor and reimbursed by the lessee as variable payments. In March 2019, the FASB also issued ASU 2019-01, Leases (Topic 842) Codification Improvements, to further clarify certain identified issues regarding implementation of ASU 2016-02. Specifically, the amendments in ASU 2019-01 clarify the determination of fair value of underlying assets by lessors that are not manufacturers or dealers, the cash flow presentation of sales-type or direct financing leases, and transition disclosures for interim periods. Issued in November 201 9 , ASU 201 9 -1 0 , “ Financial Instruments-Credit Losses, Derivatives and Hedging, and Leases ” alters the effective date of ASU 2016- 02 for private companies. Under the provisions of ASU 201 9 -1 0 , ASU 2016- 02 is now effective for fiscal years beginning after December 15, 20 20 including interim periods within those years for non-public business entities. Management will adopt these ASUs using the private company effective date of January 1, 202 1 and is currently evaluating the impact to the consolidated financial statements and related method of adoption, specifically, management is in the process of determining an appropriate discount rate to record identified right-of-use assets .

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2020
Revenue From Contract With Customer [Abstract]
Schedule of Non-Interest Income, Segregated by Revenue Streams in-Scope and Out-of-Scope of Topic 606	The following presents non-interest income, segregated by revenue streams in-scope and out-of-scope of Topic 606, for the three months and six months ended June 30, 2020 and 2019: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 Non-Interest Income In-scope of Topic 606 Deposit accounts core service charges $ 312 $ 149 $ 523 $ 261 Deposit account transaction based fee income 958 829 2,058 1,460 Swap referral fees, included in other non-interest income 262 — 842 — Mortgage referral fees 357 198 559 308 Non-Interest Income (in-scope of Topic 606) 1,889 1,176 3,982 2,029 Non-Interest Income (out-of-scope of Topic 606) 676 2,599 1,295 4,803 Total Non-Interest Income $ 2,565 $ 3,775 $ 5,277 $ 6,832

Business Combinations (Tables)

Business Combinations (Tables)	6 Months Ended
	Jun. 30, 2020
First Beeville Financial Corporation
Fair Values of Assets Acquired and Liabilities Assumed	Estimated fair values of the assets acquired and liabilities assumed in this transaction as of the closing date are as follows: Assets of acquired bank (Dollars in thousands): Cash and cash equivalents $ 60,491 Securities available for sale 57,206 Loans held for investment 296,397 Premises and equipment 5,184 Other real estate owned 1,359 Goodwill 25,848 Core deposit intangible 5,695 Other assets 12,618 Total assets acquired $ 464,798 Liabilities of acquired bank: Deposits $ 398,427 Other liabilities 515 Total liabilities assumed $ 398,942 Common stock issued at $21.20 per share $ 33,479 Cash paid $ 32,377
Chandler Bancorp, Inc.
Fair Values of Assets Acquired and Liabilities Assumed	Estimated fair values of the assets acquired and liabilities assumed in the Citizens acquisition as of the closing date are as follows: Assets of acquired bank (Dollars in thousands): Cash and cash equivalents $ 84,240 Loans held for investment 252,037 Premises and equipment 10,849 Goodwill 22,409 Core deposit intangible 850 Other assets 3,247 Total assets acquired $ 373,632 Liabilities of acquired bank: Deposits $ 271,742 FHLB Borrowings $ 38,242 Other liabilities 1,142 Total liabilities assumed $ 311,126 Common stock issued at $21.20 per share $ 44,604 Cash paid $ 17,902
Simmons Bank
Fair Values of Assets Acquired and Liabilities Assumed	Estimated fair values of the assets acquired and liabilities assumed in the Simmons acquisition as of the closing date are as follows: Assets of acquired bank (Dollars in thousands): Cash and cash equivalents $ 418 Loans held for investment 255,455 Premises and equipment 2,195 Goodwill 11,456 Core deposit intangible 10 Other assets 1,756 Total assets acquired $ 271,290 Liabilities of acquired bank: Deposits $ 139,672 Other liabilities 47 Total liabilities assumed $ 139,719 Cash paid $ 131,571

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 Cost Gains Losses Value (Dollars in thousands) Available for sale: U.S. Treasury securities $ 57,523 $ 180 $ 1 $ 57,702 State and municipal obligations 7,222 185 — 7,407 Residential mortgage-backed securities 24,532 1,237 — 25,769 Total available for sale $ 89,277 $ 1,602 $ 1 $ 90,878 Amortized Unrealized Fair December 31, 2019 Cost Gains Losses Value (Dollars in thousands) Available for sale: U.S. Treasury securities $ 60,315 $ 71 $ 15 $ 60,371 State and municipal obligations 7,861 120 — 7,981 Residential mortgage-backed securities 27,922 664 1 28,585 Total available for sale $ 96,098 $ 855 $ 16 $ 96,937
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 for the period presented: Amortized Fair June 30, 2020 Cost Value (Dollars in thousands) Available for sale: Due in one year or less $ 59,458 $ 59,654 Due after one year through five years 5,097 5,230 Due after five years through ten years 76 87 Due after ten years 114 138 Residential mortgage-backed securities 24,532 25,769 Total available for sale $ 89,277 $ 90,878
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 June 30, 2020 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss (Dollars in thousands) Available for sale: U.S. Treasury securities $ 33,995 $ 1 $ — $ — $ 33,995 $ 1 State and municipal obligations — — — — — — Residential mortgage-backed securities — — — — — — Total available for sale $ 33,995 $ 1 $ — $ — $ 33,995 $ 1 Less than 12 Months 12 Months or More Total December 31, 2019 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss (Dollars in thousands) Available for sale: U.S. Treasury securities $ 30,762 $ 15 $ — $ — $ 30,762 $ 15 State and municipal obligations — — — — — — Residential mortgage-backed securities — — 481 1 481 1 Total available for sale $ 30,762 $ 15 $ 481 $ 1 $ 31,243 $ 16

Loans, Net (Tables)

Loans, Net (Tables)	6 Months Ended
	Jun. 30, 2020
Receivables [Abstract]
Summary of Loans, Net	Loans, net consisted of the following at June 30, 2020 and December 31, 2019: June 30, 2020 Acquired Loans (1) Organic Loans Total Loans (Dollars in thousands) Commercial and industrial loans (2) $ 83,678 $ 633,602 $ 717,280 Real estate: 1-4 single family residential loans 118,925 253,520 372,445 Construction, land and development 155,131 234,937 390,068 Commercial real estate loans (including multifamily) 372,760 470,488 843,248 Consumer loans and leases 9,625 9,534 19,159 Municipal and other loans 15,832 69,260 85,092 Total loans held in portfolio (3) $ 755,951 $ 1,671,341 $ 2,427,292 Allowance for loan losses — (9,905 ) (9,905 ) Loans held in portfolio, net $ 755,951 $ 1,661,436 $ 2,417,387 December 31, 2019 Acquired Loans (1) Organic Loans Total Loans (Dollars in thousands) Commercial and industrial loans (2) $ 46,842 $ 236,107 $ 282,949 Real estate: 1-4 single family residential loans 118,669 257,074 375,743 Construction, land and development 58,054 201,330 259,384 Commercial real estate loans (including multifamily) 332,476 421,336 753,812 Consumer loans and leases 11,351 11,418 22,769 Municipal and other loans 13,709 58,816 72,525 Total loans held in portfolio (3) $ 581,101 $ 1,186,081 $ 1,767,182 Allowance for loan losses — (6,737 ) (6,737 ) Loans held in portfolio, net $ 581,101 $ 1,179,344 $ 1,760,445 (1) Acquired loans in 2020 include loans acquired in the Comanche, Beeville, Citizens, and Simmons acquisitions. Acquired loans in 2019 include loans acquired in the Comanche, Beeville, and Citizens acquisitions. All loans originated after acquisition close date are included in organic loans. (2 ) Organic loans balance includes $75.1 million and $74.2 million of the unguaranteed portion of U.S. Small Business Administration (“SBA”) loans as of June 30, 2020 and December 31, 2019, respectively. (3 ) Organic loans balance includes $(13.1) million and $(4.2) million of deferred fees, cost, premium and discount as of June 30, 2020 and December 31, 2019, 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 for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 (Dollars in thousands) Principal outstanding, beginning of year $ 7,447 $ 93 $ 6,005 $ 107 Additions (reductions) of affiliations — 2,352 — 2,352 New loans made in current year 1,130 — 2,849 — Repayments (1,649 ) (12 ) (1,926 ) (26 ) Principal outstanding, end of year $ 6,928 $ 2,433 $ 6,928 $ 2,433

Allowance for Loan and Lease _2

Allowance for Loan and Lease Losses (Tables)	6 Months Ended
	Jun. 30, 2020
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 June 30, 2020 Beginning Balance Charge-offs Recoveries Provision Ending Balance (Dollars in thousands) Commercial and industrial loans $ 4,484 $ (455 ) $ 5 $ 2,279 $ 6,313 Real estate: 1-4 single family residential loans 35 — — 72 107 Construction, land and development loans 1,293 — — (35 ) 1,258 Commercial real estate loans (including multifamily) 1,749 — — 414 2,163 Consumer loans and leases 51 (107 ) 2 103 49 Municipal and other loans 8 — 2 5 15 Ending allowance balance $ 7,620 $ (562 ) $ 9 $ 2,838 $ 9,905 Allowance Rollforward Three Months Ended June 30, 2019 Beginning Balance Charge-offs Recoveries Provision Ending Balance (Dollars in thousands) Commercial and industrial loans $ 4,661 $ (643 ) $ 31 $ 168 $ 4,217 Real estate: 1-4 single family residential loans 34 — — (2 ) 32 Construction, land and development loans 749 — — 45 794 Commercial real estate loans (including multifamily) 1,057 — — 134 1,191 Consumer loans and leases 57 (16 ) 3 (9 ) 35 Municipal and other loans 11 — 1 (4 ) 8 Ending allowance balance $ 6,569 $ (659 ) $ 35 $ 332 $ 6,277 Allowance Rollforward Six Months Ended June 30, 2020 Beginning Balance Charge-offs Recoveries Provision Ending Balance (Dollars in thousands) Commercial and industrial loans $ 4,078 $ (709 ) $ 9 $ 2,935 $ 6,313 Real estate: 1-4 single family residential loans 31 — — 76 107 Construction, land and development loans 1,055 — — 203 1,258 Commercial real estate loans (including multifamily) 1,451 — — 712 2,163 Consumer loans and leases 68 (159 ) 14 126 49 Municipal and other loans 54 — 4 (43 ) 15 Ending allowance balance $ 6,737 $ (868 ) $ 27 $ 4,009 $ 9,905 Allowance Rollforward Six Months Ended June 30, 2019 Beginning Balance Charge-offs Recoveries Provision Ending Balance (Dollars in thousands) Commercial and industrial loans $ 4,453 $ (1,221 ) $ 59 $ 926 $ 4,217 Real estate: 1-4 single family residential loans 59 — — (27 ) 32 Construction, land and development loans 731 — — 63 794 Commercial real estate loans (including multifamily) 960 — — 231 1,191 Consumer loans and leases 80 (34 ) 5 (16 ) 35 Municipal and other loans 3 — 1 4 8 Ending allowance balance $ 6,286 $ (1,255 ) $ 65 $ 1,181 $ 6,277
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 for the periods presented: Accruing June 30, 2020 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 $ 713,359 $ 264 $ - $ 192 $ 3,465 $ 717,280 Real estate: 1-4 single family residential loans 370,187 810 48 — 1,400 372,445 Construction, land and development 389,852 — — — 216 390,068 Commercial real estate loans (including multifamily) 840,656 332 — — 2,260 843,248 Consumer loans and leases 19,073 59 16 — 11 19,159 Municipal and other loans 85,080 — 12 — — 85,092 Total loans $ 2,418,207 $ 1,465 $ 76 $ 192 $ 7,352 $ 2,427,292 Accruing December 31, 2019 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 $ 278,922 $ 760 $ 688 $ - $ 2,579 $ 282,949 Real estate: 1-4 single family residential loans 372,828 1,018 — — 1,897 375,743 Construction, land and development 258,497 671 — — 216 259,384 Commercial real estate loans (including multifamily) 750,432 1,283 404 — 1,693 753,812 Consumer loans and leases 22,663 27 3 2 74 22,769 Municipal and other loans 72,525 — — — — 72,525 Total loans $ 1,755,867 $ 3,759 $ 1,095 $ 2 $ 6,459 $ 1,767,182
Summary of Loans by Key Indicators of Credit Quality	The following tables summarize the Company’s loans by key indicators of credit quality for the periods presented: June 30, 2020 Pass Special Mention Substandard Doubtful (Dollars in thousands) Commercial and industrial loans $ 698,525 $ 2,311 $ 16,443 $ 1 Real estate: 1-4 single family residential loans 368,765 646 3,034 — Construction, land and development 385,121 4,731 216 — Commercial real estate loans (including multifamily) 826,470 4,956 11,822 — Consumer loans and leases 19,116 16 27 — Municipal and other loans 81,983 3,082 27 — Total loans $ 2,379,980 $ 15,742 $ 31,569 $ 1 December 31, 2019 Pass Special Mention Substandard Doubtful (Dollars in thousands) Commercial and industrial loans $ 266,688 $ 1,905 $ 14,355 $ 1 Real estate: 1-4 single family residential loans 372,190 893 2,660 — Construction, land and development 258,864 304 216 — Commercial real estate loans (including multifamily) 734,757 5,312 13,743 — Consumer loans and leases 22,632 — 137 — Municipal and other loans 72,134 — 391 — Total loans $ 1,727,265 $ 8,414 $ 31,502 $ 1
Summary of Investment in Loans Disaggregated Based on Method of Evaluating Impairment	The following tables show the Company’s investment in loans disaggregated based on the method of evaluating impairment for the periods presented: Loans - Recorded Investment Allowance for Credit Loss June 30, 2020 Individually Evaluated for Impairment Collectively Evaluated for Impairment Individually Evaluated for Impairment Collectively Evaluated for Impairment (Dollars in thousands) Commercial and industrial loans $ 3,519 $ 713,761 $ 2,514 $ 3,799 Real estate: 1-4 single family residential loans 1,540 370,905 71 36 Construction, land and development 216 389,852 — 1,258 Commercial real estate loans (including multifamily) 2,260 840,988 — 2,163 Consumer loans and leases 11 19,148 — 49 Municipal and other loans — 85,092 — 15 Total loans $ 7,546 $ 2,419,746 $ 2,585 $ 7,320 Loans - Recorded Investment Allowance for Credit Loss December 31, 2019 Individually Evaluated for Impairment Collectively Evaluated for Impairment Individually Evaluated for Impairment Collectively Evaluated for Impairment (Dollars in thousands) Commercial and industrial loans $ 2,508 $ 280,441 $ 1,422 $ 2,657 Real estate: 1-4 single family residential loans 1,988 373,755 3 28 Construction, land and development 216 259,168 — 1,055 Commercial real estate loans (including multifamily) 1,571 752,241 — 1,451 Consumer loans and leases 24 22,745 19 48 Municipal and other loans — 72,525 — 54 Total loans $ 6,307 $ 1,760,875 $ 1,444 $ 5,293
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 for the periods presented: Impaired Loans - With Allowance Impaired Loans - With no Allowance June 30, 2020 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance (Dollars in thousands) Commercial and industrial loans $ 3,215 $ 3,220 $ 2,514 $ 304 $ 215 Real estate: 1-4 single family residential loans 316 315 71 1,224 1,156 Construction, land and development — — — 216 214 Commercial real estate loans (including multifamily) — — — 2,260 275 Consumer loans and leases — — — 11 — Municipal and other loans — — — — — Total loans $ 3,531 $ 3,535 $ 2,585 $ 4,015 $ 1,860 Impaired Loans - With Allowance Impaired Loans - With no Allowance December 31, 2019 Recorded Investment Unpaid Principal Balance Related Allowance Recorded Investment Unpaid Principal Balance (Dollars in thousands) Commercial and industrial loans $ 2,150 $ 2,168 $ 1,422 $ 358 $ 360 Real estate: 1-4 single family residential loans 12 12 3 1,976 1,965 Construction, land and development — — — 216 214 Commercial real estate loans (including multifamily) — — — 1,571 1,571 Consumer loans and leases 24 24 19 — — Municipal and other loans — — — — — Total loans $ 2,186 $ 2,204 $ 1,444 $ 4,121 $ 4,110 Three Months Ended June 30, 2020 2019 Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized (Dollars in thousands) Commercial and industrial loans $ 3,590 $ — $ 3,691 $ — Real estate: 1-4 single family residential loans 1,547 — 1,282 — Construction, land and development 216 — 220 — Commercial real estate loans (including multifamily) 2,232 — 243 — Consumer loans and leases 11 — 16 — Municipal and other loans — — — — Total loans $ 7,596 $ — $ 5,452 $ —
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, for the periods presented: June 30, 2020 December 31, 2019 Number of contracts Recorded Investment Number of contracts Recorded Investment (Dollars in thousands) Performing TDRs: Commercial and industrial loans 2 $ 55 2 $ 58 Real estate: 1-4 single family residential loans 3 140 3 151 Construction, land and development — — — — Commercial real estate loans (including multifamily) — — — — Consumer loans and leases — — — — Municipal and other loans — — — — Total performing TDRs 5 195 5 209 Nonperforming TDRs 13 543 5 198 Total TDRs 18 $ 738 10 $ 407 Allowance attributable to TDRs $ 422 $ 113
Summary of TDRs Includes Newly Designated TDRs and Modifications to Existing TDRs	The following tables summarize TDRs, and includes newly designated TDRs as well as modifications made to existing TDRs, for the periods presented. 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. The CARES Act includes a provision for the Company to opt out of applying the TDR accounting guidance in ASC 310-40 for certain loan modifications. Loan modifications made between March 1, 2020 and the earlier of i) December 30, 2020 or ii) 60 days after the President declares a termination of the COVID-19 national emergency are eligible for this relief if the related loans were not more than 30 days past due as of December 31, 2019. As of June 30, 2020, 1,216 qualified loans had been granted 90 day deferrals or interest only payment periods of 90 days with an unpaid principal balance of $520.6 million. Three Months Ended June 30, 2020 2019 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 1 $ 276 $ 276 $ 276 4 $ 145 $ 139 $ 113 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 — — — — — — — —

Goodwill and Intangibles (Table

Goodwill and Intangibles (Tables)	6 Months Ended
	Jun. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Other Intangible Assets	Goodwill and other intangible assets are presented in the table below. As of June 30, 2020, we evaluated recent events to determine if a triggering event has occurred. Management determined that the economic disruption and uncertainty surrounding the COVID-19 pandemic does constitute a triggering event and a Step 1 Goodwill analysis was deemed necessary. The Step 1 analysis performed included utilizing the discounted cash flow and market approaches and based on our evaluation, we concluded that our goodwill was not more than likely impaired as of that date. Six Months Ended June 30, 2020 Year Ended December 31, 2019 (Dollars in thousands) Beginning goodwill $ 68,503 $ 18,253 Arising from business combination 11,456 50,250 Measurement Period Adjustments (1,993 ) Ending goodwill $ 77,966 $ 68,503 Core deposit intangible 19,712 19,712 Arising from business combination 10 — Less: Accumulated amortization (10,105 ) (8,240 ) Core deposit intangible, net $ 9,617 $ 11,472
Schedule of Estimated Amortization Expense for Intangibles	The estimated amount of amortization expense for core deposit intangibles to be recognized over the next five fiscal years is as follows: Type of intangibles Remainder of 2020 2021 2022 2023 2024 2025 (Dollars in thousands) Core deposit intangible $ 1,799 $ 3,028 $ 2,212 $ 1,499 $ 744 $ 200

SBA Servicing Asset (Tables)

SBA Servicing Asset (Tables)	6 Months Ended
	Jun. 30, 2020
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 six months ended June 30, 2020 and 2019: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 (Dollars in thousands) Beginning balance $ 3,055 $ 3,747 $ 3,355 $ 3,965 Origination of servicing assets 84 322 189 520 Change in fair value: Due to run-off (135 ) (239 ) (275 ) (404 ) Due to market changes 111 (260 ) (154 ) (511 ) Ending balance $ 3,115 $ 3,570 $ 3,115 $ 3,570

Deposits (Tables)

Deposits (Tables)	6 Months Ended
	Jun. 30, 2020
Deposits By Component Alternative [Abstract]
Summary of Deposits by Category	The following table sets forth the Company’s deposits by category for the periods presented: June 30, 2020 December 31, 2019 (Dollars in thousands) Noninterest-bearing demand deposits $ 745,646 $ 444,822 Interest-bearing demand deposits 360,282 370,467 Interest-bearing NOW accounts 31,132 28,204 Savings and money market accounts 555,555 404,886 Time deposits 722,376 679,747 Total deposits $ 2,414,991 $ 1,928,126 Time deposits $100,000 and greater $ 585,709 $ 333,464 Time deposits $250,000 and greater 220,855 204,389 Related party deposits (executive officers and directors) 31,284 23,150

Stock-Based Compensation and _2

Stock-Based Compensation and Other Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Activity Related to Restricted Stock Units	The following table presents the activity during the period related to restricted stock units from the 2017 Stock Plan: 2017 Stock Plan Restricted Stock Unit Awards Shares Weighted Average Grant Date Fair Value Outstanding at January 1, 2020 59,280 $ 22.11 Granted 78,997 $ 10.45 Vested (8,715 ) 22.12 Forfeited (2,500 ) 21.20 Outstanding at June 30, 2020 127,062 $ 14.88
Summary of Stock Based Compensation Expense	A summary of selected data related to stock-based compensation expense for the three months ended March 31, 2020 and 2019 are as follows: Restricted Stock Unit Awards June 30, 2020 2019 (Dollars in thousands) Stock-based compensation expense $ 473 $ — Unrecognized compensation expense related to stock-based compensation $ 1,611 $ — Weighted-average life over which expense is expected to be recognized (years) 4.46 —
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, 2020 898,572 $ - Granted — Exercised (34,500 ) $ 12.18 $ - Forfeited (1,300 ) $ 16.00 Expired — — Outstanding at June 30, 2020 862,772 $ 13.43 $ - 3.94 Vested and exercisable at June 30, 2020 810,072 $ 13.38 $ - 3.80
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, 2020 199,447 $ 17.53 Granted — — — Exercised — — — Forfeited (1,733 ) 15 Expired — — Outstanding at June 30, 2020 197,714 $ 17.55 $ - 7.21 Vested and exercisable at June 30, 2020 97,828 $ 16.89 $ - 7.07

Basic and Diluted Earnings Pe_2

Basic and Diluted Earnings Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2020
Earnings Per Share [Abstract]
Schedule of Computation of Basic and Diluted Earnings Per Share	The following table presents the computation of basic and diluted earnings per share for the periods presented: Three Months Ended June 30, Six Months Ended June 30, 2020 2019 2020 2019 (Dollars in thousands, except per share data) Net income available to common stockholders $ 7,694 $ 5,827 $ 11,768 $ 9,637 Weighted average number of common shares - basic 17,581,959 13,765,929 17,883,034 12,963,700 Effect of dilutive securities: Employee stock-based compensation awards and warrants 30,960 470,315 116,172 469,060 Weighted average number of common shares - diluted 17,612,919 14,236,244 17,999,206 13,432,760 Basic earnings per common share $ 0.44 $ 0.42 $ 0.66 $ 0.74 Diluted earnings per common share $ 0.44 $ 0.41 $ 0.65 $ 0.72 Anti-dilutive warrants and stock options — 9,350 — 1,850

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Schedule of Unfunded Commitments	Unfunded commitments are as follows for the periods presented: June 30, 2020 December 31, 2019 (Dollars in thousands) Unfunded loan commitments $ 275,080 $ 243,568 Commercial and standby letters of credit 1,887 1,232 Total $ 276,967 $ 244,800

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis	The following tables present the assets and liabilities measured at fair value on a recurring basis for the periods presented: June 30, 2020 Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets: U.S. Treasury securities $ 57,702 $ — $ — $ 57,702 State and municipal obligations — 7,407 — 7,407 Residential mortgage-backed securities — 25,769 — 25,769 SBA servicing rights — — 3,115 3,115 Total $ 57,702 $ 33,176 $ 3,115 $ 93,993 December 31, 2019 Level 1 Level 2 Level 3 Total (Dollars in thousands) Assets: U.S. Treasury securities $ 60,371 $ - $ — $ 60,371 State and municipal obligations — 7,981 — 7,981 Residential mortgage-backed securities — 28,585 — 28,585 SBA servicing rights — — 3,355 3,355 Total $ 60,371 $ 36,566 $ 3,355 $ 100,292
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 June 30, 2020 December 31, 2019 (Dollars in thousands) Assets (classified in Level 3): Impaired loans $ 4,374 $ 3,990 Other real estate and repossessed assets 3,743 3,653
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 June 30, 2020 Non-recurring: Impaired loans $ 4,374 Third party appraisals Collateral discounts 0.0% - 100.0% (44.7%) Other real estate owned 3,743 Third party appraisals Collateral discounts and estimated cost to sell 10.0 % Recurring: SBA servicing assets 3,115 Discounted cash flows Conditional prepayment rate 11.8 % Discount rate 10.0 % December 31, 2019 Non-recurring: Impaired loans $ 3,990 Third party appraisals Collateral discounts 0.0% - 100.0% (19.2%) Other real estate owned 3,653 Third party appraisals Collateral discounts and estimated cost to sell 10.0 % Recurring: SBA servicing assets 3,355 Discounted cash flows Conditional prepayment rate 11.8 % Discount rate 11.5 %
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 for the periods presented: June 30, 2020 Carrying Value Fair Value Level 1 Level 2 Level 3 (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 235,344 $ 235,344 $ 235,344 $ — $ — Time deposits in other banks — — — — — Available for sale securities 90,878 90,878 57,702 33,176 — FHLB and other bank stock 5,696 5,696 — 5,696 — Loans, net 2,417,387 2,391,732 — — 2,391,732 Loans held for sale 7,718 8,191 — 8,191 — Accrued interest receivable 12,188 12,188 — 12,188 — Bank-owned life insurance 15,787 15,787 — 15,787 — SBA servicing rights 3,115 3,115 — — 3,115 Financial Liabilities: Deposits $ 2,414,991 $ 2,389,569 $ — $ 2,389,569 $ — Accrued interest payable 1,025 1,025 — 1,025 — Short-term borrowings 10,000 9,600 — 10,000 — Long-term borrowings 183,076 175,753 — 175,753 — December 31, 2019 Carrying Value Fair Value Level 1 Level 2 Level 3 (Dollars in thousands) Financial Assets: Cash and cash equivalents $ 325,957 $ 325,957 $ 325,957 $ — $ — Time deposits in other banks 490 490 Available for sale securities 96,937 96,937 — 96,937 — FHLB and other bank stock 8,310 8,310 — 8,310 — Loans, net 1,760,445 1,758,511 — — 1,758,511 Loans held for sale 3,989 4,307 — 4,307 — Accrued interest receivable 6,507 6,507 — 6,507 — Bank-owned life insurance 15,610 15,610 — 15,610 — SBA servicing rights 3,355 3,355 — — 3,355 Financial Liabilities: Deposits $ 1,928,126 $ 1,855,491 $ — $ 1,855,491 $ — Accrued interest payable 1,219 1,219 — 1,219 — Short-term borrowings — — — — — Long-term borrowings 105,140 102,488 — 102,488 —

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Additional Information (Details) - Immaterial Error Corrections $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
Subsidiary Sale Of Stock [Line Items]
Increase in investing activities of cash flow	$ 1
Decrease in financing activities of cash flow	$ (1)

Revenue Recognition - Schedule

Revenue Recognition - Schedule of Non-Interest Income, Segregated by Revenue Streams in-Scope and Out-of-Scope of Topic 606 (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Noninterest income:
Non-Interest Income	$ 2,565	$ 3,775	$ 5,277	$ 6,832
Accounting Standards Update 2014-09
Noninterest income:
Non-Interest Income (in-scope of Topic 606)	1,889	1,176	3,982	2,029
Out-of-scope of Topic 606
Noninterest income:
Non-Interest Income	676	2,599	1,295	4,803
Deposit accounts core service charges | Accounting Standards Update 2014-09
Noninterest income:
Non-Interest Income (in-scope of Topic 606)	312	149	523	261
Deposit account transaction based fee income | Accounting Standards Update 2014-09
Noninterest income:
Non-Interest Income (in-scope of Topic 606)	958	829	2,058	1,460
Swap referral fees, included in other non-interest income | Accounting Standards Update 2014-09
Noninterest income:
Non-Interest Income (in-scope of Topic 606)	262		842
Mortgage referral fees | Accounting Standards Update 2014-09
Noninterest income:
Non-Interest Income (in-scope of Topic 606)	$ 357	$ 198	$ 559	$ 308

Business Combinations - Additio

Business Combinations - Additional Information (Details)	Feb. 28, 2020USD ($)Branch	Nov. 05, 2019USD ($)Branchshares	Apr. 02, 2019USD ($)Branchofficeshares	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Business Acquisition [Line Items]
Goodwill				$ 77,966,000		$ 77,966,000		$ 68,503,000	$ 18,253,000
First Beeville Financial Corporation
Business Acquisition [Line Items]
Business acquisition date						Apr. 2, 2019
Business acquisition, shares issued | shares			1,579,191
Business acquisition, cash paid			$ 32,377,000
Business acquisition, total consideration			$ 65,900,000
Acquired ownership interest			100.00%
Goodwill			$ 25,848,000
Goodwill recognized expected to be deductible for income tax purposes			0
Acquisition expenses				0	$ 1,200,000	$ 0	$ 1,700,000
Deemed purchased credit impaired			0
Non-credit impaired loans fair value			296,400,000
Contractual balance			298,900,000
Interest income			$ 2,500,000
First Beeville Financial Corporation | North/South Texas
Business Acquisition [Line Items]
Number of additional branches | Branch			3
Number of loan production offices | office			2
Chandler Bancorp, Inc.
Business Acquisition [Line Items]
Business acquisition date						Nov. 5, 2019
Business acquisition, shares issued | shares		2,100,000
Business acquisition, cash paid		$ 17,902,000
Business acquisition, total consideration		62,500,000
Goodwill		22,409,000
Goodwill recognized expected to be deductible for income tax purposes		0
Acquisition expenses				69,000	0	$ 1,200,000	0
Deemed purchased credit impaired		3,200,000
Non-credit impaired loans fair value		248,800,000
Contractual balance		253,100,000
Interest income		$ 1,100,000		3,500,000		7,400,000
Business acquisition, measurement period adjustments to loan discount						1,700,000
Business acquisition, measurement period adjustments to other assets						296,000
Business acquisition, measurement period adjustments to premises and equipment						262,000
Business acquisition, measurement period adjustments to other liabilities						217,000
Business acquisition, measurement period adjustments				0
Earnings from acquisition				2,600,000		$ 4,800,000
Chandler Bancorp, Inc. | North/South Texas
Business Acquisition [Line Items]
Number of additional branches | Branch		7
Simmons Bank
Business Acquisition [Line Items]
Business acquisition date						Feb. 28, 2020
Business acquisition, cash paid	$ 131,571,000
Goodwill	11,456,000
Acquisition expenses				$ 0	$ 0	$ 441,000	$ 0
Deemed purchased credit impaired	0
Non-credit impaired loans fair value	255,500,000
Contractual balance	260,300,000
Interest income	$ 4,800,000
Business acquisition, measurement period adjustments to other assets						$ 1,000,000
Goodwill deductible for tax purpose amortization period	15 years
Simmons Bank | North/South Texas
Business Acquisition [Line Items]
Number of additional branches | Branch	5

Business Combinations - Fair Va

Business Combinations - Fair Value of Asset Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Feb. 28, 2020	Nov. 05, 2019	Apr. 02, 2019	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill				$ 77,966	$ 68,503	$ 18,253
First Beeville Financial Corporation
Business Acquisition [Line Items]
Cash and cash equivalents			$ 60,491
Securities available for sale			57,206
Loans held for investment			296,397
Premises and equipment			5,184
Other real estate owned			1,359
Goodwill			25,848
Core deposit intangible			5,695
Other assets			12,618
Total assets acquired			464,798
Deposits			398,427
Other liabilities			515
Total liabilities assumed			398,942
Common stock issued			33,479
Business acquisition, cash paid			$ 32,377
Chandler Bancorp, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents		$ 84,240
Loans held for investment		252,037
Premises and equipment		10,849
Goodwill		22,409
Core deposit intangible		850
Other assets		3,247
Total assets acquired		373,632
Deposits		271,742
FHLB Borrowings		38,242
Other liabilities		1,142
Total liabilities assumed		311,126
Common stock issued		44,604
Business acquisition, cash paid		$ 17,902
Simmons Bank
Business Acquisition [Line Items]
Cash and cash equivalents	$ 418
Loans held for investment	255,455
Premises and equipment	2,195
Goodwill	11,456
Core deposit intangible	10
Other assets	1,756
Total assets acquired	271,290
Deposits	139,672
Other liabilities	47
Total liabilities assumed	139,719
Business acquisition, cash paid	$ 131,571

Business Combinations - Fair _2

Business Combinations - Fair Value of Asset Acquired and Liabilities Assumed (Parenthetical) (Details) - Common Stock - $ / shares	Nov. 05, 2019	Apr. 02, 2019
First Beeville Financial Corporation
Business Acquisition [Line Items]
Shares issued, price per share		$ 21.20
Chandler Bancorp, Inc.
Business Acquisition [Line Items]
Shares issued, price per share	$ 21.20

Investment Securities - Schedul

Investment Securities - Schedule of Fair Values of Securities Available for Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Schedule Of Available For Sale Securities [Line Items]
Securities available for sale, Amortized Cost	$ 89,277	$ 96,098
Securities available for sale, Unrealized Gains	1,602	855
Securities available for sale, Unrealized Losses	1	16
Available for sale securities, at fair value	90,878	96,937
U.S. Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Securities available for sale, Amortized Cost	57,523	60,315
Securities available for sale, Unrealized Gains	180	71
Securities available for sale, Unrealized Losses	1	15
Available for sale securities, at fair value	57,702	60,371
State and Municipal Obligations
Schedule Of Available For Sale Securities [Line Items]
Securities available for sale, Amortized Cost	7,222	7,861
Securities available for sale, Unrealized Gains	185	120
Available for sale securities, at fair value	7,407	7,981
Residential Mortgage-backed Securities
Schedule Of Available For Sale Securities [Line Items]
Securities available for sale, Amortized Cost	24,532	27,922
Securities available for sale, Unrealized Gains	1,237	664
Securities available for sale, Unrealized Losses		1
Available for sale securities, at fair value	$ 25,769	$ 28,585

Investment Securities - Additio

Investment Securities - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2020USD ($)Security	Jun. 30, 2019USD ($)	Jun. 30, 2020USD ($)Security	Jun. 30, 2019USD ($)	Dec. 31, 2019USD ($)
Investments Debt And Equity Securities [Abstract]
Taxable interest and dividends on investment securities	$ 419,000	$ 1,100,000	$ 884,000	$ 2,200,000
Tax-exempt interest on investment securities	38,000	163,000	77,000	271,000
Available for sale securities pledged	$ 62,800,000		$ 62,800,000		$ 90,600,000
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 | Security	91		91
Available for sale, securities in unrealized loss positions, number of positions | Security	5		5
Available for sale, securities in unrealized loss positions, number of positions, more than 12 months | Security	0		0
Available for sale securities, gross realized gain (loss), excluding other than temporary impairments			$ 0
Sales of investment securities available for sale		34,700,000		79,920,000
Gross realized gains		$ 1,100,000		$ 2,100,000
Number of securities sold | Security	0		0

Investment Securities - Sched_2

Investment Securities - Schedule of Securities Available for Sale by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Available for sale:
Due in one year or less, Amortized Cost	$ 59,458
Due after one year through five years, Amortized Cost	5,097
Due after five years through ten years, Amortized Cost	76
Due after ten years, Amortized Cost	114
Total available for sale, Amortized Cost	89,277	$ 96,098
Available for sale:
Due in one year or less, Fair Value	59,654
Due after one year through five years. Fair Value	5,230
Due after five years through ten years. Fair Value	87
Due after ten years. Fair Value	138
Total available for sale, Fair Value	90,878	96,937
Residential Mortgage-backed Securities
Available for sale:
Total available for sale, Amortized Cost	24,532	27,922
Available for sale:
Total available for sale, Fair Value	$ 25,769	$ 28,585

Investment Securities - Sched_3

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	Jun. 30, 2020	Dec. 31, 2019
Schedule Of Available For Sale Securities [Line Items]
Investment Securities, Available for sale, Fair Value, Less than 12 Months	$ 33,995	$ 30,762
Investment Securities, Available for sale, Unrealized Loss, Less than 12 Months	1	15
Investment Securities, Available for sale, Fair Value, 12 Months or More		481
Investment Securities, Available for sale, Unrealized Loss, 12 Months or More		1
Investment Securities, Available for sale, Fair Value	33,995	31,243
Investment Securities, Available for sale, Unrealized Loss	1	16
U.S. Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Investment Securities, Available for sale, Fair Value, Less than 12 Months	33,995	30,762
Investment Securities, Available for sale, Unrealized Loss, Less than 12 Months	1	15
Investment Securities, Available for sale, Fair Value	33,995	30,762
Investment Securities, Available for sale, Unrealized Loss	$ 1	15
Residential Mortgage-backed Securities
Schedule Of Available For Sale Securities [Line Items]
Investment Securities, Available for sale, Fair Value, 12 Months or More		481
Investment Securities, Available for sale, Unrealized Loss, 12 Months or More		1
Investment Securities, Available for sale, Fair Value		481
Investment Securities, Available for sale, Unrealized Loss		$ 1

Loans, Net - Summary of Loans,

Loans, Net - Summary of Loans, Net (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[1]	$ 2,427,292		$ 1,767,182
Allowance for loan losses		(9,905)	$ (7,620)	(6,737)	$ (6,277)	$ (6,569)	$ (6,286)
Loans, net		2,417,387		1,760,445
Commercial and Industrial Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[2]	717,280		282,949
Consumer Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		19,159		22,769
Municipal and Other Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		85,092		72,525
Acquired Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[1],[3]	755,951		581,101
Loans, net	[3]	755,951		581,101
Acquired Loans | Commercial and Industrial Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[2],[3]	83,678		46,842
Acquired Loans | Consumer Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[3]	9,625		11,351
Acquired Loans | Municipal and Other Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[3]	15,832		13,709
Organic Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[1]	1,671,341		1,186,081
Allowance for loan losses		(9,905)		(6,737)
Loans, net		1,661,436		1,179,344
Organic Loans | Commercial and Industrial Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[2]	633,602		236,107
Organic Loans | Consumer Loans and Leases
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		9,534		11,418
Organic Loans | Municipal and Other Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		69,260		58,816
Real Estate | 1-4 Single Family Residential Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		372,445		375,743
Real Estate | Construction, Land and Development
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		390,068		259,384
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		843,248		753,812
Real Estate | Acquired Loans | 1-4 Single Family Residential Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[3]	118,925		118,669
Real Estate | Acquired Loans | Construction, Land and Development
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[3]	155,131		58,054
Real Estate | Acquired Loans | Commercial Real Estate Loans (Including Multifamily)
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio	[3]	372,760		332,476
Real Estate | Organic Loans | 1-4 Single Family Residential Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		253,520		257,074
Real Estate | Organic Loans | Construction, Land and Development
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		234,937		201,330
Real Estate | Organic Loans | Commercial Real Estate Loans (Including Multifamily)
Accounts Notes And Loans Receivable [Line Items]
Total loans held in portfolio		$ 470,488		$ 421,336
[1]	Organic loans balance includes $(13.1) million and $(4.2) million of deferred fees, cost, premium and discount as of June 30, 2020 and December 31, 2019, respectively.
[2]	Organic loans balance includes $75.1 million and $74.2 million of the unguaranteed portion of U.S. Small Business Administration (“SBA”) loans as of June 30, 2020 and December 31, 2019, respectively.
[3]	Acquired loans in 2020 include loans acquired in the Comanche, Beeville, Citizens, and Simmons acquisitions.  Acquired loans in 2019 include loans acquired in the Comanche, Beeville, and Citizens acquisitions.  All loans originated after acquisition close date are included in organic loans.

Loans, Net - Summary of Loans_2

Loans, Net - Summary of Loans, Net (Parenthetical) (Details) - Organic Loans - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Deferred fees, cost, premium and discount	$ (13.1)	$ (4.2)
SBA Loans
Accounts Notes And Loans Receivable [Line Items]
Unguaranteed portion of U.S loans	$ 75.1	$ 74.2

Loans, Net - Additional Informa

Loans, Net - Additional Information (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Pledged loans, collateral for FHLB advances		$ 794,600,000		$ 794,600,000		$ 668,500,000
Pledged loans, collateral under PPPLF		94,800,000		94,800,000		0
Amount outstanding	[1]	2,427,292,000		2,427,292,000		1,767,182,000
Unfunded commitments to related parties		276,967,000		276,967,000		244,800,000
Executive Officers and Directors
Accounts Notes And Loans Receivable [Line Items]
Unfunded commitments to related parties		772,000		772,000		861,000
Loan Held for Investment and Long-term Borrowings
Accounts Notes And Loans Receivable [Line Items]
Secured borrowings		13,300,000		13,300,000		14,700,000
Consumer Mortgage Loans
Accounts Notes And Loans Receivable [Line Items]
Recorded mortgage loans in process of foreclosure		0		0		0
SBA Loans
Accounts Notes And Loans Receivable [Line Items]
Paycheck protection program loans under CARES Act		428,000,000		$ 428,000,000
PPP loan interest rate				1.00%
Deferred origination costs				$ 4,900
Deferred origination fees				15,300
Amount outstanding		$ 94,900		$ 94,900
Interest rate		0.35%		0.35%
Unpaid principal balances of loans serviced		$ 198,500,000		$ 198,500,000		$ 205,000,000
SBA Loans | Third Party
Accounts Notes And Loans Receivable [Line Items]
Servicing loans sold		4,500,000	$ 16,400,000	10,100,000	$ 26,500,000
Realized gains on servicing loans sold		$ 326,000	$ 1,400,000	$ 790,000	$ 2,200,000
SBA Loans | Minimum
Accounts Notes And Loans Receivable [Line Items]
Paycheck protection program loans contractual term				2 years
SBA Loans | Maximum
Accounts Notes And Loans Receivable [Line Items]
Paycheck protection program loans contractual term				5 years
[1]	Organic loans balance includes $(13.1) million and $(4.2) million of deferred fees, cost, premium and discount as of June 30, 2020 and December 31, 2019, respectively.

Loans, Net - Summary of Loans t

Loans, Net - Summary of Loans to Related Parties and Principal Owners (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Receivables [Abstract]
Principal outstanding, beginning of year	$ 7,447	$ 93	$ 6,005	$ 107
Additions (reductions) of affiliations		2,352		2,352
New loans made in current year	1,130		2,849
Repayments	(1,649)	(12)	(1,926)	(26)
Principal outstanding, end of year	$ 6,928	$ 2,433	$ 6,928	$ 2,433

Allowance for Loan and Lease _3

Allowance for Loan and Lease Losses - Additional Information (Details)	Feb. 28, 2020USD ($)	Apr. 02, 2019USD ($)	Jun. 30, 2020USD ($)Loan	Jun. 30, 2019USD ($)Loan	Jun. 30, 2020USD ($)LoanContract	Jun. 30, 2019USD ($)Loan	Dec. 31, 2019USD ($)LoanContract	Nov. 05, 2019USD ($)
Financing Receivable Recorded Investment Past Due [Line Items]
Provision for loan losses			$ 2,838,000	$ 332,000	$ 4,009,000	$ 1,181,000
Recorded investment, 90 days past due and still accruing			192,000		192,000		$ 2,000
Non-accrual loans, Past due			$ 7,352,000		$ 7,352,000		$ 6,459,000
Number of qualified loans | Contract					18		10
Number of restructured loans, defaulted | Loan			0	0	0	0
Covid-19
Financing Receivable Recorded Investment Past Due [Line Items]
Description of Loan modifications					Loan modifications made between March 1, 2020 and the earlier of i) December 30, 2020 or ii) 60 days after the President declares a termination of the COVID-19 national emergency are eligible for this relief if the related loans were not more than 30 days past due as of December 31, 2019.
Number of qualified loans | Loan					1,216
Loans, deferrals days					90 days
Loans, interest only payment period					90 days
Unpaid principal balance			$ 520,600,000		$ 520,600,000
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		1
Non-accrual loans, Past due			$ 3,400,000		$ 3,400,000		$ 2,600,000
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Non-accrual loans, Past due			618,000		618,000		308,000
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Non-accrual loans, Past due			53,000		53,000		$ 1,200,000
Paycheck Protection Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Provision for loan losses					$ 0
Percentage Reserve					0.00%
Beeville
Financing Receivable Recorded Investment Past Due [Line Items]
Business combination loan in acquiree, amount		$ 298,900,000
Business combination loan In acquiree, fair value		296,400,000
Business combination loan in acquiree, discount		2,500,000
Contractual balance		298,900,000
Non-credit impaired loans fair value		$ 296,400,000
Citizens
Financing Receivable Recorded Investment Past Due [Line Items]
Business combination loan in acquiree, discount								$ 1,100,000
Contractual balance								253,100,000
Non-credit impaired loans fair value								248,800,000
Purchased credit impaired loans fair value								$ 3,200,000
Citizens | Purchased Credit Impaired Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Impaired loans			580,000		$ 580,000
Simmons Bank
Financing Receivable Recorded Investment Past Due [Line Items]
Business combination loan in acquiree, amount	$ 260,300,000
Business combination loan In acquiree, fair value	255,500,000
Business combination loan in acquiree, discount	4,800,000
Contractual balance	260,300,000
Non-credit impaired loans fair value	$ 255,500,000
Beeville or Simmons | Purchased Credit Impaired Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Impaired loans			$ 0		$ 0

Allowance for Loan and Lease _4

Allowance for Loan and Lease Losses - Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	$ 7,620	$ 6,569	$ 6,737	$ 6,286
Charge-offs	(562)	(659)	(868)	(1,255)
Recoveries	9	35	27	65
Provision	2,838	332	4,009	1,181
Ending Balance	9,905	6,277	9,905	6,277
Commercial and Industrial Loans
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	4,484	4,661	4,078	4,453
Charge-offs	(455)	(643)	(709)	(1,221)
Recoveries	5	31	9	59
Provision	2,279	168	2,935	926
Ending Balance	6,313	4,217	6,313	4,217
Real Estate | 1-4 Single Family Residential Loans
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	35	34	31	59
Provision	72	(2)	76	(27)
Ending Balance	107	32	107	32
Real Estate | Construction, Land and Development Loans
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	1,293	749	1,055	731
Provision	(35)	45	203	63
Ending Balance	1,258	794	1,258	794
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	1,749	1,057	1,451	960
Provision	414	134	712	231
Ending Balance	2,163	1,191	2,163	1,191
Consumer Loans and Leases
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	51	57	68	80
Charge-offs	(107)	(16)	(159)	(34)
Recoveries	2	3	14	5
Provision	103	(9)	126	(16)
Ending Balance	49	35	49	35
Municipal and Other Loans
Loans And Leases Receivable Disclosure [Line Items]
Beginning Balance	8	11	54	3
Recoveries	2	1	4	1
Provision	5	(4)	(43)	4
Ending Balance	$ 15	$ 8	$ 15	$ 8

Allowance for Loan and Lease _5

Allowance for Loan and Lease Losses - Summary of Aging Analysis of Recorded Investment for Delinquent Loans by Portfolio and Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	$ 2,418,207	$ 1,755,867
Recorded investment, Non-accrual	7,352	6,459
Recorded investment, Total	2,427,292	1,767,182
Financing Receivables, 30 to 59 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	1,465	3,759
Recorded investment, Non-accrual	618	308
Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	76	1,095
Recorded investment, Non-accrual	53	1,200
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	192	2
Recorded investment, Non-accrual	3,400	2,600
Commercial and Industrial Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	713,359	278,922
Recorded investment, Non-accrual	3,465	2,579
Recorded investment, Total	717,280	282,949
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	264	760
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		688
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	192
Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	370,187	372,828
Recorded investment, Non-accrual	1,400	1,897
Recorded investment, Total	372,445	375,743
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	810	1,018
Real Estate | 1-4 Single Family Residential Loans | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	48
Real Estate | Construction, Land and Development
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	389,852	258,497
Recorded investment, Non-accrual	216	216
Recorded investment, Total	390,068	259,384
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		671
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	840,656	750,432
Recorded investment, Non-accrual	2,260	1,693
Recorded investment, Total	843,248	753,812
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	332	1,283
Real Estate | Commercial Real Estate Loans (Including Multifamily) | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due		404
Consumer Loans and Leases
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	19,073	22,663
Recorded investment, Non-accrual	11	74
Recorded investment, Total	19,159	22,769
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	59	27
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	16	3
Consumer Loans and Leases | 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		2
Municipal and Other Loans
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Current	85,080	72,525
Recorded investment, Total	85,092	$ 72,525
Municipal and Other Loans | Financing Receivables, 60 to 89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Recorded investment, Accruing, Past due	$ 12

Allowance for Loan and Lease _6

Allowance for Loan and Lease Losses - Summary of Loans by Key Indicators of Credit Quality (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 2,427,292	$ 1,767,182
Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	2,379,980	1,727,265
Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	15,742	8,414
Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	31,569	31,502
Doubtful
Financing Receivable Recorded Investment [Line Items]
Total loans	1	1
Commercial and Industrial Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	717,280	282,949
Commercial and Industrial Loans | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	698,525	266,688
Commercial and Industrial Loans | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	2,311	1,905
Commercial and Industrial Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	16,443	14,355
Commercial and Industrial Loans | Doubtful
Financing Receivable Recorded Investment [Line Items]
Total loans	1	1
Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	372,445	375,743
Real Estate | 1-4 Single Family Residential Loans | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	368,765	372,190
Real Estate | 1-4 Single Family Residential Loans | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	646	893
Real Estate | 1-4 Single Family Residential Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	3,034	2,660
Real Estate | Construction, Land and Development
Financing Receivable Recorded Investment [Line Items]
Total loans	390,068	259,384
Real Estate | Construction, Land and Development | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	385,121	258,864
Real Estate | Construction, Land and Development | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	4,731	304
Real Estate | Construction, Land and Development | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	216	216
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Financing Receivable Recorded Investment [Line Items]
Total loans	843,248	753,812
Real Estate | Commercial Real Estate Loans (Including Multifamily) | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	826,470	734,757
Real Estate | Commercial Real Estate Loans (Including Multifamily) | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	4,956	5,312
Real Estate | Commercial Real Estate Loans (Including Multifamily) | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	11,822	13,743
Consumer Loans and Leases
Financing Receivable Recorded Investment [Line Items]
Total loans	19,159	22,769
Consumer Loans and Leases | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	19,116	22,632
Consumer Loans and Leases | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	16
Consumer Loans and Leases | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	27	137
Municipal and Other Loans
Financing Receivable Recorded Investment [Line Items]
Total loans	85,092	72,525
Municipal and Other Loans | Pass
Financing Receivable Recorded Investment [Line Items]
Total loans	81,983	72,134
Municipal and Other Loans | Special Mention
Financing Receivable Recorded Investment [Line Items]
Total loans	3,082
Municipal and Other Loans | Substandard
Financing Receivable Recorded Investment [Line Items]
Total loans	$ 27	$ 391

Allowance for Loan and Lease _7

Allowance for Loan and Lease Losses - Summary of Investment in Loans Disaggregated Based on Method of Evaluating Impairment (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment	$ 7,546	$ 6,307
Loans - Recorded Investment, Collectively Evaluated for Impairment	2,419,746	1,760,875
Allowance for Credit Loss, Individually Evaluated for Impairment	2,585	1,444
Allowance for Credit Loss, Collectively Evaluated for Impairment	7,320	5,293
Commercial and Industrial Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment	3,519	2,508
Loans - Recorded Investment, Collectively Evaluated for Impairment	713,761	280,441
Allowance for Credit Loss, Individually Evaluated for Impairment	2,514	1,422
Allowance for Credit Loss, Collectively Evaluated for Impairment	3,799	2,657
Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment	1,540	1,988
Loans - Recorded Investment, Collectively Evaluated for Impairment	370,905	373,755
Allowance for Credit Loss, Individually Evaluated for Impairment	71	3
Allowance for Credit Loss, Collectively Evaluated for Impairment	36	28
Real Estate | Construction, Land and Development
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment	216	216
Loans - Recorded Investment, Collectively Evaluated for Impairment	389,852	259,168
Allowance for Credit Loss, Collectively Evaluated for Impairment	1,258	1,055
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment	2,260	1,571
Loans - Recorded Investment, Collectively Evaluated for Impairment	840,988	752,241
Allowance for Credit Loss, Collectively Evaluated for Impairment	2,163	1,451
Consumer Loans and Leases
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Individually Evaluated for Impairment	11	24
Loans - Recorded Investment, Collectively Evaluated for Impairment	19,148	22,745
Allowance for Credit Loss, Individually Evaluated for Impairment		19
Allowance for Credit Loss, Collectively Evaluated for Impairment	49	48
Municipal and Other Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Loans - Recorded Investment, Collectively Evaluated for Impairment	85,092	72,525
Allowance for Credit Loss, Collectively Evaluated for Impairment	$ 15	$ 54

Allowance for Loan and Lease _8

Allowance for Loan and Lease Losses - Summary of Information Regarding Impaired Loans Evaluated for Specific Reserves (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Financing Receivable Impaired [Line Items]
Impaired Loans - With Allowance, Recorded Investment	$ 3,531		$ 2,186
Impaired Loans - With Allowance, Unpaid Principal Balance	3,535		2,204
Impaired Loans - With Allowance, Related Allowance	2,585		1,444
Impaired Loans - With no Allowance, Recorded Investment	4,015		4,121
Impaired Loans - With no Allowance, Unpaid Principal Balance	1,860		4,110
Average Recorded Investment	7,596	$ 5,452
Commercial and Industrial Loans
Financing Receivable Impaired [Line Items]
Impaired Loans - With Allowance, Recorded Investment	3,215		2,150
Impaired Loans - With Allowance, Unpaid Principal Balance	3,220		2,168
Impaired Loans - With Allowance, Related Allowance	2,514		1,422
Impaired Loans - With no Allowance, Recorded Investment	304		358
Impaired Loans - With no Allowance, Unpaid Principal Balance	215		360
Average Recorded Investment	3,590	3,691
Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Impaired [Line Items]
Impaired Loans - With Allowance, Recorded Investment	316		12
Impaired Loans - With Allowance, Unpaid Principal Balance	315		12
Impaired Loans - With Allowance, Related Allowance	71		3
Impaired Loans - With no Allowance, Recorded Investment	1,224		1,976
Impaired Loans - With no Allowance, Unpaid Principal Balance	1,156		1,965
Average Recorded Investment	1,547	1,282
Real Estate | Construction, Land and Development
Financing Receivable Impaired [Line Items]
Impaired Loans - With no Allowance, Recorded Investment	216		216
Impaired Loans - With no Allowance, Unpaid Principal Balance	214		214
Average Recorded Investment	216	220
Real Estate | Commercial Real Estate Loans (Including Multifamily)
Financing Receivable Impaired [Line Items]
Impaired Loans - With no Allowance, Recorded Investment	2,260		1,571
Impaired Loans - With no Allowance, Unpaid Principal Balance	275		1,571
Average Recorded Investment	2,232	243
Consumer Loans and Leases
Financing Receivable Impaired [Line Items]
Impaired Loans - With Allowance, Recorded Investment			24
Impaired Loans - With Allowance, Unpaid Principal Balance			24
Impaired Loans - With Allowance, Related Allowance			$ 19
Impaired Loans - With no Allowance, Recorded Investment	11
Average Recorded Investment	$ 11	$ 16

Allowance for Loan and Lease _9

Allowance for Loan and Lease Losses - Summary of Troubled Debt Restructurings (TDRs) Based Upon Delinquency Status (Details) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2020USD ($)Contract	Jun. 30, 2019Contract	Jun. 30, 2020USD ($)Contract	Dec. 31, 2019USD ($)Contract
Financing Receivable Modifications [Line Items]
Number of contracts | Contract			18	10
Recorded Investment | $	$ 738		$ 738	$ 407
Allowance attributable to TDRs | $	$ 422		$ 422	$ 113
Commercial and Industrial Loans
Financing Receivable Modifications [Line Items]
Number of contracts | Contract	1	4
Performing TDRs
Financing Receivable Modifications [Line Items]
Number of contracts | Contract			5	5
Recorded Investment | $	$ 195		$ 195	$ 209
Performing TDRs | Commercial and Industrial Loans
Financing Receivable Modifications [Line Items]
Number of contracts | Contract			2	2
Recorded Investment | $	55		$ 55	$ 58
Performing TDRs | Real Estate | 1-4 Single Family Residential Loans
Financing Receivable Modifications [Line Items]
Number of contracts | Contract			3	3
Recorded Investment | $	140		$ 140	$ 151
Nonperforming TDRs
Financing Receivable Modifications [Line Items]
Number of contracts | Contract			13	5
Recorded Investment | $	$ 543		$ 543	$ 198

Allowance for Loan and Lease_10

Allowance for Loan and Lease Losses - Summary of TDRs Includes Newly Designated TDRs and Modifications to Existing TDRs (Details) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2020USD ($)Contract	Jun. 30, 2019USD ($)Contract	Jun. 30, 2020Contract	Dec. 31, 2019Contract
Financing Receivable Modifications [Line Items]
Number of contracts | Contract			18	10
Commercial and Industrial Loans
Financing Receivable Modifications [Line Items]
Number of contracts | Contract	1	4
Pre-Modification Outstanding Recorded Investment	$ 276	$ 145
Post-Modification Outstanding Recorded Investment	276	139
Related Allowance	$ 276	$ 113

Goodwill and Intangibles - Sche

Goodwill and Intangibles - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Beginning goodwill	$ 68,503	$ 18,253
Arising from business combination	11,456	50,250
Measurement Period Adjustments	(1,993)
Ending goodwill	77,966	68,503
Core deposit intangible	19,712	19,712
Arising from business combination	10
Less: Accumulated amortization	(10,105)	(8,240)
Core deposit intangible, net	$ 9,617	$ 11,472

Goodwill and Intangibles - Addi

Goodwill and Intangibles - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 919	$ 1,006	$ 1,865	$ 1,609
Core Deposit Intangible
Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 919	$ 1,000	$ 1,900	$ 1,600

Goodwill and Intangibles - Sc_2

Goodwill and Intangibles - Schedule of Estimated Amortization Expense for Intangibles (Details) - Core Deposit Intangible $ in Thousands	Jun. 30, 2020USD ($)
Finite Lived Intangible Assets [Line Items]
Remainder of 2020	$ 1,799
2021	3,028
2022	2,212
2023	1,499
2024	744
2025	$ 200

SBA Servicing Asset - Additiona

SBA Servicing Asset - Additional Information (Details) - SBA Loans - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Servicing Assets At Fair Value [Line Items]
Unpaid principal balances of loans serviced	$ 198,500		$ 198,500		$ 205,000
Loan expenses	$ 256	$ 40	$ 266	$ 304

SBA Servicing Asset - Summary o

SBA Servicing Asset - Summary of Activity Pertaining to SBA Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Transfers And Servicing Of Financial Assets [Abstract]
Beginning balance	$ 3,055	$ 3,747	$ 3,355	$ 3,965
Origination of servicing assets	84	322	189	520
Change in fair value:
Due to run-off	(135)	(239)	(275)	(404)
Due to market changes	111	(260)	(154)	(511)
Ending balance	$ 3,115	$ 3,570	$ 3,115	$ 3,570

Deposits - Summary of Deposits

Deposits - Summary of Deposits by Category (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Deposits By Component Alternative [Abstract]
Noninterest-bearing demand deposits	$ 745,646	$ 444,822
Interest-bearing demand deposits	360,282	370,467
Interest-bearing NOW accounts	31,132	28,204
Savings and money market accounts	555,555	404,886
Time deposits	722,376	679,747
Total deposits	2,414,991	1,928,126
Time deposits $100,000 and greater	585,709	333,464
Time deposits $250,000 and greater	220,855	204,389
Related party deposits (executive officers and directors)	$ 31,284	$ 23,150

Deposits - Additional Informati

Deposits - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Deposits By Component Alternative [Abstract]
Aggregate amount of overdraft demand deposits reclassified to loans	$ 97	$ 129
Aggregate amount of maturities for time deposits, period	5 years
Aggregate amount of maturities for time deposits, year one	$ 545,300
Aggregate amount of maturities for time deposits, year two	137,700
Aggregate amount of maturities for time deposits, year three	26,400
Aggregate amount of maturities for time deposits, year four	6,300
Aggregate amount of maturities for time deposits, year five	6,400
Brokered certificates of deposits	$ 11,900	$ 6,000

Stock-Based Compensation and _3

Stock-Based Compensation and Other Benefit Plans - Summary of Option Activity (Details)	6 Months Ended
	Jun. 30, 2020$ / sharesshares
2008 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options, Outstanding	898,572
Options, Exercised	(34,500)
Options, Forfeited	(1,300)
Options, Outstanding	862,772
Options, Vested and exercisable	810,072
Weighted Average Exercise Price, Exercised | $ / shares	$ 12.18
Weighted Average Exercise Price, Forfeited | $ / shares	16
Weighted Average Exercise Price, Outstanding | $ / shares	13.43
Weighted Average Exercise Price, Vested and exercisable | $ / shares	$ 13.38
Weighted Average Remaining Contractual Life (Years), Outstanding	3 years 11 months 8 days
Weighted Average Remaining Contractual Life (Years), Vested and Exercisable	3 years 9 months 18 days
2017 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options, Outstanding	199,447
Options, Forfeited	(1,733)
Options, Outstanding	197,714
Options, Vested and exercisable	97,828
Weighted Average Exercise Price, Outstanding | $ / shares	$ 17.53
Weighted Average Exercise Price, Forfeited | $ / shares	15
Weighted Average Exercise Price, Outstanding | $ / shares	17.55
Weighted Average Exercise Price, Vested and exercisable | $ / shares	$ 16.89
Weighted Average Remaining Contractual Life (Years), Outstanding	7 years 2 months 15 days
Weighted Average Remaining Contractual Life (Years), Vested and Exercisable	7 years 25 days

Stock-Based Compensation and _4

Stock-Based Compensation and Other Benefit Plans - Additional Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020USD ($)shares	Jun. 30, 2020USD ($)shares
Bank4Texas Warrants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option activity | shares	0	0
Oasis Warrants
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option activity | shares	0	0
2008 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost	$ 120	$ 120
Compensation cost recognized weighted average remaining period		11 months 15 days
2017 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost	398	$ 398
Compensation cost recognized weighted average remaining period		2 years 6 months 14 days
2017 Stock Plan | Restricted Stock Unit Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost	$ 1,611	$ 1,611
Compensation cost recognized weighted average remaining period		4 years 5 months 15 days
Restricted stock units granted | shares		78,997
Fair value of restricted stock		$ 826

Stock-Based Compensation and _5

Stock-Based Compensation and Other Benefit Plans - Summary of Activity Related to Restricted Stock Units (Details) - 2017 Stock Plan - Restricted Stock Unit Awards	6 Months Ended
	Jun. 30, 2020$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Outstanding, Beginning balance | shares	59,280
Shares, Granted | shares	78,997
Shares, Vested | shares	(8,715)
Shares, Forfeited | shares	(2,500)
Shares, Outstanding, Ending balance | shares	127,062
Weighted-Average Grant Date Fair Value, Outstanding | $ / shares	$ 22.11
Weighted-Average Grant Date Fair Value, Granted | $ / shares	10.45
Weighted-Average Grant Date Fair Value, Vested | $ / shares	22.12
Weighted-Average Grant Date Fair Value, Forfeited | $ / shares	21.20
Weighted-Average Grant Date Fair Value, Outstanding | $ / shares	$ 14.88

Stock Based Compensation and Ot

Stock Based Compensation and Other Benefit Plans - Summary of Stock Based Compensation Expense (Details) - 2017 Stock Plan $ in Thousands	6 Months Ended
	Jun. 30, 2020USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense related to stock-based compensation	$ 398
Weighted-average life over which expense is expected to be recognized (years)	2 years 6 months 14 days
Restricted Stock Unit Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 473
Unrecognized compensation expense related to stock-based compensation	$ 1,611
Weighted-average life over which expense is expected to be recognized (years)	4 years 5 months 15 days

Basic and Diluted Earnings Pe_3

Basic and Diluted Earnings Per Common Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 7,694	$ 5,827	$ 11,768	$ 9,637
Weighted average number of common shares - basic	17,581,959	13,765,929	17,883,034	12,963,700
Effect of dilutive securities:
Employee stock-based compensation awards and warrants	30,960	470,315	116,172	469,060
Weighted average number of common shares - diluted	17,612,919	14,236,244	17,999,206	13,432,760
Basic earnings per common share	$ 0.44	$ 0.42	$ 0.66	$ 0.74
Diluted earnings per common share	$ 0.44	$ 0.41	$ 0.65	$ 0.72
Anti-dilutive warrants and stock options		9,350		1,850

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Effective tax rate	20.50%	20.90%	16.30%	19.70%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Unfunded Commitments | Commitments for Exposure to Credit Loss
Loss Contingencies [Line Items]
Reserve for unfunded commitments	$ 362	$ 98

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Unfunded Commitments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Supply Commitment [Line Items]
Unfunded commitments, Total	$ 276,967	$ 244,800
Commercial and Standby Letters of Credit
Supply Commitment [Line Items]
Unfunded commitments, Total	1,887	1,232
Unfunded Loan Commitments
Supply Commitment [Line Items]
Unfunded commitments, Total	$ 275,080	$ 243,568

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets:
Total available for sale, Fair Value	$ 90,878	$ 96,937
U.S. Treasury Securities
Assets:
Total available for sale, Fair Value	57,702	60,371
State and Municipal Obligations
Assets:
Total available for sale, Fair Value	7,407	7,981
Residential Mortgage-backed Securities
Assets:
Total available for sale, Fair Value	25,769	28,585
Level 1
Assets:
Total available for sale, Fair Value	57,702
Level 2
Assets:
Total available for sale, Fair Value	33,176	96,937
Fair Value Measurements on Recurring Basis
Assets:
Total available for sale, Fair Value	93,993	100,292
Fair Value Measurements on Recurring Basis | U.S. Treasury Securities
Assets:
Total available for sale, Fair Value	57,702	60,371
Fair Value Measurements on Recurring Basis | State and Municipal Obligations
Assets:
Total available for sale, Fair Value	7,407	7,981
Fair Value Measurements on Recurring Basis | Residential Mortgage-backed Securities
Assets:
Total available for sale, Fair Value	25,769	28,585
Fair Value Measurements on Recurring Basis | SBA Servicing Rights
Assets:
Total available for sale, Fair Value	3,115	3,355
Fair Value Measurements on Recurring Basis | Level 1
Assets:
Total available for sale, Fair Value	57,702	60,371
Fair Value Measurements on Recurring Basis | Level 1 | U.S. Treasury Securities
Assets:
Total available for sale, Fair Value	57,702	60,371
Fair Value Measurements on Recurring Basis | Level 2
Assets:
Total available for sale, Fair Value	33,176	36,566
Fair Value Measurements on Recurring Basis | Level 2 | State and Municipal Obligations
Assets:
Total available for sale, Fair Value	7,407	7,981
Fair Value Measurements on Recurring Basis | Level 2 | Residential Mortgage-backed Securities
Assets:
Total available for sale, Fair Value	25,769	28,585
Fair Value Measurements on Recurring Basis | Level 3
Assets:
Total available for sale, Fair Value	3,115	3,355
Fair Value Measurements on Recurring Basis | Level 3 | SBA Servicing Rights
Assets:
Total available for sale, Fair Value	$ 3,115	$ 3,355

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2020USD ($)	Jun. 30, 2020USD ($)
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

Fair Value Measurements - Sch_2

Fair Value Measurements - Schedule of Assets Measured at Fair Value on Non-Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets (classified in Level 3):
Other real estate owned and repossessed assets	$ 3,743	$ 3,653
Level 3 | Fair Value Measurements on Non-Recurring Basis
Assets (classified in Level 3):
Impaired loans	4,374	3,990
Other real estate owned and repossessed assets	$ 3,743	$ 3,653

Fair Value Measurements - Signi

Fair Value Measurements - Significant Unobservable Inputs Used in Recurring and Non-Recurring Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other real estate owned	$ 3,743		$ 3,653
SBA servicing asset	3,115	$ 3,055	3,355	$ 3,570	$ 3,747	$ 3,965
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
SBA servicing asset	3,115		3,355
Level 3 | Fair Value Measurements on Non-Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	4,374		3,990
Other real estate owned	$ 3,743		$ 3,653
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	44.70%		19.20%
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 Non-Recurring Basis | Third Party Appraisals
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	$ 4,374		$ 3,990
Other real estate owned	$ 3,743		$ 3,653
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	11.80%		11.80%
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	10.00%		11.50%
Level 3 | Fair Value Measurements on Recurring Basis | Discounted Cash Flows
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
SBA servicing asset	$ 3,115		$ 3,355

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Financial Assets:
Total available for sale, Fair Value	$ 90,878		$ 96,937
SBA servicing rights	3,115	$ 3,055	3,355	$ 3,570	$ 3,747	$ 3,965
Level 1
Financial Assets:
Cash and cash equivalents	235,344		325,957
Total available for sale, Fair Value	57,702
Level 2
Financial Assets:
Total available for sale, Fair Value	33,176		96,937
FHLB and other bank stock	5,696		8,310
Loans held for sale	8,191		4,307
Accrued interest receivable	12,188		6,507
Bank-owned life insurance	15,787		15,610
Financial Liabilities:
Deposits	2,389,569		1,855,491
Accrued interest payable	1,025		1,219
Short-term borrowings	10,000
Long-term borrowings	175,753		102,488
Level 3
Financial Assets:
Loans, net	2,391,732		1,758,511
SBA servicing rights	3,115		3,355
Carrying Value
Financial Assets:
Cash and cash equivalents	235,344		325,957
Time deposits in other banks			490
Total available for sale, Fair Value	90,878		96,937
FHLB and other bank stock	5,696		8,310
Loans, net	2,417,387		1,760,445
Loans held for sale	7,718		3,989
Accrued interest receivable	12,188		6,507
Bank-owned life insurance	15,787		15,610
SBA servicing rights	3,115		3,355
Financial Liabilities:
Deposits	2,414,991		1,928,126
Accrued interest payable	1,025		1,219
Short-term borrowings	10,000
Long-term borrowings	183,076		105,140
Fair Value
Financial Assets:
Cash and cash equivalents	235,344		325,957
Time deposits in other banks			490
Total available for sale, Fair Value	90,878		96,937
FHLB and other bank stock	5,696		8,310
Loans, net	2,391,732		1,758,511
Loans held for sale	8,191		4,307
Accrued interest receivable	12,188		6,507
Bank-owned life insurance	15,787		15,610
SBA servicing rights	3,115		3,355
Financial Liabilities:
Deposits	2,389,569		1,855,491
Accrued interest payable	1,025		1,219
Short-term borrowings	9,600
Long-term borrowings	$ 175,753		$ 102,488

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - Subordinated Notes Due 2030 - Private Placement - Subsequent Event $ in Millions	Jul. 24, 2020USD ($)
Subsequent Event [Line Items]
Fixed floating rate of subordinated notes	6.00%
Proceeds from issuance of subordinated debt	$ 37
Interest rate	6.00%
Frequency of payment	quarterly