Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative effect of accounting change	Adjusted beginning balance	Common stock	Common stock Adjusted beginning balance	Additional paid-in capital	Additional paid-in capital Adjusted beginning balance	Treasury stock	Treasury stock Adjusted beginning balance	Retained earnings	Retained earnings Cumulative effect of accounting change	Retained earnings Adjusted beginning balance	Accumulated other comprehensive income (loss)	Accumulated other comprehensive income (loss) Adjusted beginning balance
Balance, beginning of period (in shares) at Dec. 31, 2020				19,878,713
Balance, beginning of period at Dec. 31, 2020	$ 485,787			$ 2		$ 259,363		$ (38,148)		$ 255,451			$ 9,119
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock on restricted stock grants (in shares)				24,629
Issuance of common stock on restricted stock grants	812					812
Share-based compensation, net of forfeitures	1,730					1,730
Net income	43,164									43,164
Other comprehensive (loss) income	(7,455)												(7,455)
Balance, end of period (in shares) at Dec. 31, 2021				19,903,342
Balance, ending of period at Dec. 31, 2021	$ 524,038			$ 2		261,905		(38,148)		298,615			1,664
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Merger with Pioneer Bancshares, Inc. (issuance of treasury stock shares) (in shares)	1,557,054			4,910,412
Merger with Pioneer Bancshares, Inc. (issuance of treasury stock shares)	$ 236,094					197,946		38,148
Issuance of common stock on restricted stock grants (in shares)				11,344
Issuance of common stock on restricted stock grants	$ 270					270
Stock option exercises (in shares)	104,985			95,886
Stock option exercises	$ (579)					(579)
Share-based compensation, net of forfeitures	1,178					1,178
Net income	59,182									59,182
Other comprehensive (loss) income	$ (45,647)												(45,647)
Balance, end of period (in shares) at Dec. 31, 2022	24,920,984			24,920,984	24,920,984
Balance, ending of period at Dec. 31, 2022	$ 774,536	$ (3,808)	$ 770,728	$ 2	$ 2	460,720	$ 460,720	0	$ 0	357,797	$ (3,808)	$ 353,989	(43,983)	$ (43,983)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-13
Merger with Pioneer Bancshares, Inc. (issuance of treasury stock shares) (in shares)	0
Issuance of common stock on restricted stock grants (in shares)				15,007
Issuance of common stock on restricted stock grants	$ 371					371
Stock option exercises (in shares)	62,915			24,648
Stock option exercises	$ (167)					(167)
Share-based compensation, net of forfeitures	1,756					1,756
Net income	103,533									103,533
Other comprehensive (loss) income	$ 976												976
Balance, end of period (in shares) at Dec. 31, 2023	24,960,639			24,960,639
Balance, ending of period at Dec. 31, 2023	$ 877,197			$ 2		$ 462,680		$ 0		$ 457,522			$ (43,007)