Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2021	$ 341	$ 263,375	$ (75,293)	$ 497,889	$ (6,684)	$ 679,628
Balance (in shares) at Dec. 31, 2021	30,526,353
Net income				18,219		18,219
Award of common shares released from Employee Benefit Trust		287				287
Vesting of restricted stock unit awards		(6,019)	6,304	(285)
Vesting of restricted stock unit awards (in shares)	297,626
Purchase of treasury shares			(8,469)			(8,469)
Purchase of treasury shares (in shares)	(360,000)
Stock-based compensation expense		4,194				4,194
Repurchase of shares to satisfy tax obligation			(2,376)			(2,376)
Repurchase of shares to satisfy tax obligation (in shares)	(97,435)
Dividends on common stock				(6,850)		(6,850)
Other comprehensive income (loss)					(8,820)	(8,820)
Balance (in shares) at Mar. 31, 2022	30,366,544
Balance at Mar. 31, 2022	$ 341	261,837	(79,834)	508,973	(15,504)	675,813
Balance at Dec. 31, 2021	$ 341	263,375	(75,293)	497,889	(6,684)	679,628
Balance (in shares) at Dec. 31, 2021	30,526,353
Net income						66,696
Other comprehensive income (loss)					(39,610)	(39,610)
Balance (in shares) at Sep. 30, 2022	29,851,253
Balance at Sep. 30, 2022	$ 341	263,755	(90,977)	543,894	(46,294)	670,719
Balance at Mar. 31, 2022	$ 341	261,837	(79,834)	508,973	(15,504)	675,813
Balance (in shares) at Mar. 31, 2022	30,366,544
Net income				25,035		25,035
Vesting of restricted stock unit awards		(38)	43	(5)
Vesting of restricted stock unit awards (in shares)	2,015
Purchase of treasury shares			(8,534)			(8,534)
Purchase of treasury shares (in shares)	(387,689)
Stock-based compensation expense		1,061				1,061
Repurchase of shares to satisfy tax obligation			(17)			(17)
Repurchase of shares to satisfy tax obligation (in shares)	(766)
Dividends on common stock				(6,786)		(6,786)
Other comprehensive income (loss)					(15,760)	(15,760)
Balance (in shares) at Jun. 30, 2022	29,980,104
Balance at Jun. 30, 2022	$ 341	262,860	(88,342)	527,217	(31,264)	670,812
Net income				23,442		23,442
Vesting of restricted stock unit awards		(80)	86	(6)
Vesting of restricted stock unit awards (in shares)	3,995
Purchase of treasury shares			(2,685)			(2,685)
Purchase of treasury shares (in shares)	(131,174)
Stock-based compensation expense		975				975
Repurchase of shares to satisfy tax obligation			(36)			(36)
Repurchase of shares to satisfy tax obligation (in shares)	(1,672)
Dividends on common stock				(6,759)		(6,759)
Other comprehensive income (loss)					(15,030)	(15,030)
Balance (in shares) at Sep. 30, 2022	29,851,253
Balance at Sep. 30, 2022	$ 341	263,755	(90,977)	543,894	(46,294)	670,719
Balance at Dec. 31, 2022	$ 341	264,332	(98,535)	547,507	(36,488)	$ 677,157
Balance (in shares) at Dec. 31, 2022	29,476,391					29,476,391
Net income				5,158		$ 5,158
Vesting of restricted stock unit awards		(5,264)	5,484	(220)
Vesting of restricted stock unit awards (in shares)	256,798
Purchase of treasury shares			(3,053)			(3,053)
Purchase of treasury shares (in shares)	(159,516)
Stock-based compensation expense		3,808				3,808
Repurchase of shares to satisfy tax obligation			(1,656)			(1,656)
Repurchase of shares to satisfy tax obligation (in shares)	(85,217)
Dividends on common stock				(6,659)		(6,659)
Other comprehensive income (loss)					(1,296)	(1,296)
Balance (in shares) at Mar. 31, 2023	29,488,456
Balance at Mar. 31, 2023	$ 341	262,876	(97,760)	545,786	(37,784)	673,459
Balance at Dec. 31, 2022	$ 341	264,332	(98,535)	547,507	(36,488)	$ 677,157
Balance (in shares) at Dec. 31, 2022	29,476,391					29,476,391
Net income						$ 23,185
Other comprehensive income (loss)					(4,443)	$ (4,443)
Balance (in shares) at Sep. 30, 2023	28,904,625					28,904,625
Balance at Sep. 30, 2023	$ 341	264,486	(105,433)	550,678	(40,931)	$ 669,141
Balance at Mar. 31, 2023	$ 341	262,876	(97,760)	545,786	(37,784)	673,459
Balance (in shares) at Mar. 31, 2023	29,488,456
Net income				8,628		8,628
Vesting of restricted stock unit awards		(30)	35	(5)
Vesting of restricted stock unit awards (in shares)	1,690
Purchase of treasury shares			(6,841)			(6,841)
Purchase of treasury shares (in shares)	(528,815)
Stock-based compensation expense		898				898
Repurchase of shares to satisfy tax obligation			(8)			(8)
Repurchase of shares to satisfy tax obligation (in shares)	(612)
Dividends on common stock				(6,598)		(6,598)
Other comprehensive income (loss)					1,765	1,765
Balance (in shares) at Jun. 30, 2023	28,960,719
Balance at Jun. 30, 2023	$ 341	263,744	(104,574)	547,811	(36,019)	671,303
Net income				9,399		9,399
Vesting of restricted stock unit awards		(108)	111	(3)
Vesting of restricted stock unit awards (in shares)	5,430
Purchase of treasury shares			(942)			(942)
Purchase of treasury shares (in shares)	(59,352)
Stock-based compensation expense		850				850
Repurchase of shares to satisfy tax obligation			(28)			(28)
Repurchase of shares to satisfy tax obligation (in shares)	(2,172)
Dividends on common stock				(6,529)		(6,529)
Other comprehensive income (loss)					(4,912)	$ (4,912)
Balance (in shares) at Sep. 30, 2023	28,904,625					28,904,625
Balance at Sep. 30, 2023	$ 341	$ 264,486	$ (105,433)	$ 550,678	$ (40,931)	$ 669,141