Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance, shares at Dec. 31, 2020	22,757,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation (shares)	55,000
Balance, shares at Mar. 31, 2021	22,812,000
Balance at Dec. 31, 2020	$ 576,238	$ 228	$ 291,315	$ 243,315	$ 41,380
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under stock-based compensation plan	339	0	339
Stock-based compensation expense	1,036		1,036
Dividends declared	(2,504)			(2,504)
Other comprehensive income (loss), net of tax	(19,622)				(19,622)
Net income	32,079			32,079
Balance at Mar. 31, 2021	$ 587,566	228	292,690	272,890	21,758
Balance, shares at Dec. 31, 2021	22,834,377
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation (shares)	76,000
Restricted shares withheld for taxes (shares)	(2,000)
Balance, shares at Mar. 31, 2022	22,907,548
Balance at Dec. 31, 2021	$ 699,335	228	295,040	385,942	18,125
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under stock-based compensation plan	378	1	377
Stock-based compensation expense	1,489		1,489
Restricted shares withheld for taxes	(516)		(516)
Dividends declared	(2,977)			(2,977)
Other comprehensive income (loss), net of tax	(63,930)				(63,930)
Net income	31,791			31,791
Balance at Mar. 31, 2022	$ 665,570	$ 229	$ 296,390	$ 414,756	$ (45,805)