Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury stock	Accumulated other comprehensive (loss) income, net	Total
Balance in the beginning at Dec. 31, 2022	$ 515	$ 1,159,508	$ 330,721	$ (310,338)	$ (88,204)	$ 1,092,202
Increase (Decrease) in Stockholders' Equity
Net income			72,840			72,840
Stock-based compensation		3,646				3,646
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock, net		(4,427)		2,950		(1,477)
Cash dividends declared ($0.27 per share)			(19,467)			(19,467)
Other comprehensive income					(410)	(410)
Balance in the ending at Jun. 30, 2023	515	1,158,727	384,094	(307,388)	(88,614)	1,147,334
Balance in the beginning at Mar. 31, 2023	515	1,160,436	361,440	(310,037)	(78,627)	1,133,727
Increase (Decrease) in Stockholders' Equity
Net income			32,557			32,557
Stock-based compensation		2,219				2,219
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock, net		(3,928)		2,649		(1,279)
Cash dividends declared ($0.27 per share)			(9,903)			(9,903)
Other comprehensive income					(9,987)	(9,987)
Balance in the ending at Jun. 30, 2023	515	1,158,727	384,094	(307,388)	(88,614)	1,147,334
Balance in the beginning at Dec. 31, 2023	515	1,162,269	433,126	(306,702)	(76,401)	1,212,807
Increase (Decrease) in Stockholders' Equity
Net income			57,526			57,526
Stock-based compensation		3,665				3,665
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock, net		(4,130)		2,822		(1,308)
Cash dividends declared ($0.27 per share)			(21,022)			(21,022)
Other comprehensive income					(4,024)	(4,024)
Balance in the ending at Jun. 30, 2024	515	1,161,804	469,630	(303,880)	(80,425)	1,247,644
Balance in the beginning at Mar. 31, 2024	515	1,163,773	454,211	(306,460)	(80,209)	1,231,830
Increase (Decrease) in Stockholders' Equity
Net income			26,135			26,135
Stock-based compensation		2,088				2,088
Issuance of stock under purchase and equity compensation plans, including gain on reissuance of treasury stock, net		(4,057)		2,580		(1,477)
Cash dividends declared ($0.27 per share)			(10,716)			(10,716)
Other comprehensive income					(216)	(216)
Balance in the ending at Jun. 30, 2024	$ 515	$ 1,161,804	$ 469,630	$ (303,880)	$ (80,425)	$ 1,247,644