Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulated adjustment for adoption of ASU	Common  Stock	Retained Earnings	Retained Earnings Cumulated adjustment for adoption of ASU	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balance at beginning of period at Dec. 31, 2018	$ 623,739	$ 125	$ 514,703	$ 116,874	$ 125	$ 0	$ (7,838)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	70,672			70,672
Other comprehensive income (loss), net of tax	10,086						10,086
Issuance of stock	43,417		43,417
Stock based compensation	2,545		2,545
Retirement of restricted stock	(715)		(715)
Exercise of stock options	313		313
Cash dividends on common stock	(24,919)			(24,919)
Balance at end of period at Dec. 31, 2019	$ 725,263	$ (3,395)	560,263	162,752	$ (3,395)	0	2,248
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-02 [Member]
Net income	$ 57,518			57,518
Other comprehensive income (loss), net of tax	9,149						9,149
Treasury stock	(1,452)					(1,452)
Stock based compensation	2,659		2,659
Retirement of restricted stock	(501)		(501)
Cash dividends on common stock	(25,457)			(25,457)
Balance at end of period at Dec. 31, 2020	763,784		562,421	191,418		(1,452)	11,397
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	95,041			95,041
Other comprehensive income (loss), net of tax	(8,133)						(8,133)
Stock based compensation	4,073		4,073
Retirement of restricted stock	(651)		(651)
Exercise of stock options	19		19
Cash dividends on common stock	(27,119)			(27,119)
Balance at end of period at Dec. 31, 2021	$ 827,014		$ 565,862	$ 259,340		$ (1,452)	$ 3,264