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, 2020	$ 341	$ 261,533	$ (69,400)	$ 442,789	$ (16,266)	$ 618,997
Balance (in shares) at Dec. 31, 2020	30,775,854
Net income	$ 0	0	0	81,793		81,793
Award of common shares released from Employee Benefit Trust	0	321	0	0		321
Vesting of restricted stock unit awards	$ 0	(5,308)	5,477	(169)	0	0
Vesting of restricted stock unit awards (in shares)	261,628
Stock-based compensation expense	$ 0	6,829	0	0		6,829
Purchase of treasury shares	$ 0	0	(9,988)	0		(9,988)
Purchase of treasury shares (in shares)	(436,619)
Repurchase of shares to satisfy tax obligation	$ 0	0	(1,382)	0		(1,382)
Repurchase of shares to satisfy tax obligation (in shares)	(74,510)
Dividends on common stock	$ 0	0	0	(26,524)		(26,524)
Other comprehensive income (loss), net of tax	$ 0	0	0	0	9,582	9,582
Balance (in shares) at Dec. 31, 2021	30,526,353
Balance at Dec. 31, 2021	$ 341	263,375	(75,293)	497,889	(6,684)	679,628
Net income	0	0	0	76,945		76,945
Award of common shares released from Employee Benefit Trust	0	287	0	0		287
Vesting of restricted stock unit awards	$ 0	(6,137)	6,433	(296)		0
Vesting of restricted stock unit awards (in shares)	303,636
Stock-based compensation expense	$ 0	6,807	0	0		6,807
Purchase of treasury shares	$ 0	0	(27,246)	0		$ (27,246)
Purchase of treasury shares (in shares)	(1,253,725)					1,253,725
Repurchase of shares to satisfy tax obligation	$ 0	0	(2,429)	0		$ (2,429)
Repurchase of shares to satisfy tax obligation (in shares)	(99,873)
Dividends on common stock	$ 0	0	0	(27,031)		(27,031)
Other comprehensive income (loss), net of tax	$ 0	0	0	0	(29,804)	$ (29,804)
Balance (in shares) at Dec. 31, 2022	29,476,391					29,476,391
Balance at Dec. 31, 2022	$ 341	264,332	(98,535)	547,507	(36,488)	$ 677,157
Net income	0	0	0	28,664		28,664
Vesting of restricted stock unit awards	$ 0	(5,402)	5,630	(228)		0
Vesting of restricted stock unit awards (in shares)	263,918
Stock-based compensation expense	$ 0	5,604	0	0		5,604
Purchase of treasury shares	$ 0	0	(11,473)	0		$ (11,473)
Purchase of treasury shares (in shares)	(786,498)					786,498
Repurchase of shares to satisfy tax obligation	$ 0	0	(1,692)	0		$ (1,692)
Repurchase of shares to satisfy tax obligation (in shares)	(88,001)
Dividends on common stock	$ 0	0	0	(26,260)		(26,260)
Other comprehensive income (loss), net of tax	$ 0	0	0	0	(2,163)	$ (2,163)
Balance (in shares) at Dec. 31, 2023	28,865,810					28,865,810
Balance at Dec. 31, 2023	$ 341	$ 264,534	$ (106,070)	$ 549,683	$ (38,651)	$ 669,837