Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balances at Dec. 31, 2017	$ 457,078	$ 275,059	$ 185,570	$ (3,551)
Net Income	53,117		53,117
Other comprehensive loss, net of tax	(3,827)			(3,827)
Amortization of unearned compensation	169	169
Exercise of stock options	493	493
Stock option expense	251	251
Stock issued stock plans	129	129
Reclassification of tax adjustment on accumulated other comprehensive loss	0		766	(766)
Cash dividends on common stock	(15,418)		(15,418)
Ending Balances at Dec. 31, 2018	491,992	276,101	224,035	(8,144)
Net Income	66,538		66,538
Other comprehensive loss, net of tax	14,576			14,576
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	379,853	269,738	6,432
Impact of adoption of ASU No. 2016–13	(15,635)		(15,635)
Net Income	68,499		68,499
Other comprehensive 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	$ 362,945	$ 301,419	$ 27,852