Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Beginning balance at Dec. 31, 2021	$ 500,631	$ 203	$ 478,862	$ 88,324	$ 1,776	$ (68,534)
Beginning balance, shares at Dec. 31, 2021		16,760,115
Net income	30,909			30,909
Other comprehensive income (loss), net of tax effects	(79,202)				(79,202)
Cash dividends - common stock per share	(2,608)			(2,608)
Dividend equivalents - restricted stock units and restricted stock awards, per share	(49)			(49)
Stock-based compensation	1,548		1,548
Stock based compensation, shares		624
Common stock issued upon exercise of stock options	97		97
Common stock issued upon exercise of stock options, shares		7,156
Common stock issued under stock-based incentive plan		$ 1	(1)
Common stock issued under stock-based incentive plan, shares		64,876
Common stock issued under employee stock purchase plan	391		391
Common stock issued under employee stock purchase plan, share		14,274
Treasury stock purchases	(23,602)					(23,602)
Treasury stock purchases, shares		(740,227)
Ending balance at Jun. 30, 2022	428,115	$ 204	480,897	116,576	(77,426)	(92,136)
Ending balance, shares at Jun. 30, 2022		16,106,818
Beginning balance at Dec. 31, 2021	500,631	$ 203	478,862	88,324	1,776	(68,534)
Beginning balance, shares at Dec. 31, 2021		16,760,115
Ending balance at Dec. 31, 2022	410,058	$ 205	484,989	140,095	(113,511)	(101,720)
Ending balance, shares at Dec. 31, 2022		15,930,112
Beginning balance at Mar. 31, 2022	452,015	$ 204	480,106	102,632	(50,012)	(80,915)
Beginning balance, shares at Mar. 31, 2022		16,454,966
Net income	15,259			15,259
Other comprehensive income (loss), net of tax effects	(27,414)				(27,414)
Cash dividends - common stock per share	(1,290)			(1,290)
Dividend equivalents - restricted stock units and restricted stock awards, per share	(25)			(25)
Stock-based compensation	744		744
Stock based compensation, shares		624
Common stock issued upon exercise of stock options	47		47
Common stock issued upon exercise of stock options, shares		3,656
Common stock issued under stock-based incentive plan, shares		3,416
Treasury stock purchases	(11,221)					(11,221)
Treasury stock purchases, shares		(355,844)
Ending balance at Jun. 30, 2022	428,115	$ 204	480,897	116,576	(77,426)	(92,136)
Ending balance, shares at Jun. 30, 2022		16,106,818
Beginning balance at Dec. 31, 2022	410,058	$ 205	484,989	140,095	(113,511)	(101,720)
Beginning balance, shares at Dec. 31, 2022		15,930,112
Net income	23,779			23,779
Other comprehensive income (loss), net of tax effects	3,286				3,286
Cash dividends - common stock per share	(3,114)			(3,114)
Dividend equivalents - restricted stock units and restricted stock awards, per share	(45)			(45)
Stock-based compensation	1,780		1,780
Common stock issued under stock-based incentive plan		$ 2	(2)
Common stock issued under stock-based incentive plan, shares		133,685
Common stock issued under employee stock purchase plan	458		458
Common stock issued under employee stock purchase plan, share		17,508
Treasury stock purchases	(17,767)					(17,767)
Treasury stock purchases, shares		(669,166)
Ending balance at Jun. 30, 2023	418,435	$ 207	487,225	160,715	(110,225)	(119,487)
Ending balance, shares at Jun. 30, 2023		15,412,139
Beginning balance at Mar. 31, 2023	425,123	$ 206	486,658	150,810	(101,238)	(111,313)
Beginning balance, shares at Mar. 31, 2023		15,730,257
Net income	11,456			11,456
Other comprehensive income (loss), net of tax effects	(8,987)				(8,987)
Cash dividends - common stock per share	(1,541)			(1,541)
Dividend equivalents - restricted stock units and restricted stock awards, per share	(10)			(10)
Stock-based compensation	568		568
Common stock issued under stock-based incentive plan		$ 1	(1)
Common stock issued under stock-based incentive plan, shares		30,998
Treasury stock purchases	(8,174)					(8,174)
Treasury stock purchases, shares		(349,116)
Ending balance at Jun. 30, 2023	$ 418,435	$ 207	$ 487,225	$ 160,715	$ (110,225)	$ (119,487)
Ending balance, shares at Jun. 30, 2023		15,412,139