Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Revision of Prior Period, Accounting Standards Update, Adjustment	Additional Paid-in Capital	Retained Earnings	Retained Earnings Revision of Prior Period, Accounting Standards Update, Adjustment	Accumulated Other Comprehensive Income (Loss)
Beginning Balances at Dec. 31, 2018	$ 491,992		$ 276,101	$ 224,035		$ (8,144)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	66,538			66,538
Other comprehensive income (loss), net of tax	$ 14,576					14,576
Accounting Standards Update	Accounting Standards Update 2016-13
Amortization of unearned compensation	$ 705		705
Exercise of stock options	236		236
Stock option expense	215		215
Stock issued stock plans	1,469		1,469
Stock issued in Salin acquisition	102,722		102,722
Repurchase of outstanding stock	(1,595)		(1,595)
Cash dividends on common stock	(20,835)			(20,835)
Ending Balances at Dec. 31, 2019	656,023	$ (15,635)	379,853	269,738	$ (15,635)	6,432
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	68,499			68,499
Other comprehensive income (loss), net of tax	21,420					21,420
Amortization of unearned compensation	1,206		1,206
Exercise of stock options	157		157
Stock option expense	132		132
Stock issued stock plans	1,233		1,233
Repurchase of outstanding stock	(19,636)		(19,636)
Cash dividends on common stock	(21,183)			(21,183)
Ending Balances at Dec. 31, 2020	692,216	$ 15,600	362,945	301,419		27,852
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	87,091			87,091
Other comprehensive income (loss), net of tax	(20,507)					(20,507)
Amortization of unearned compensation	1,751		1,751
Exercise of stock options	1,062		1,062
Stock option expense	68		68
Stock awards vested	(1,355)		(1,355)
Repurchase of outstanding stock	(7,607)		(7,607)
Stock retirement plans	(4,742)		(4,742)
Cash dividends on common stock	(24,768)			(24,768)
Ending Balances at Dec. 31, 2021	$ 723,209		$ 352,122	$ 363,742		$ 7,345