Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive (Loss) Gain, net of taxes	Retained Earnings	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2022		76,161
Beginning balance at Dec. 31, 2022	$ 418,279	$ 762	$ 302,304	$ (3,477)	$ 146,602	$ (27,912)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,671				11,671
Unrealized loss on available-for-sale marketable securities, net of taxes	1,207			1,207
Shares issued in connection with equity incentive plans, net of taxes (in shares)		167
Shares issued in connection with equity incentive plans, net of taxes	(870)	$ 1	(871)
Share-based compensation expense	1,973		1,973
Purchases of treasury stock	(2,223)					(2,223)
Shares issued for Deferred Compensation Plan, net	475		307			168
Shares issued for Employee Stock Purchase Plan	1,135		(139)			1,274
Other (in shares)		1
Other	19		8		11
Ending balance (in shares) at Mar. 31, 2023		76,329
Ending balance at Mar. 31, 2023	$ 431,666	$ 763	303,582	(2,270)	158,284	(28,693)
Beginning balance (in shares) at Dec. 31, 2023	73,341	76,329
Beginning balance at Dec. 31, 2023	$ 456,616	$ 763	310,436	(1,844)	185,010	(37,749)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,309				15,309
Unrealized loss on available-for-sale marketable securities, net of taxes	(328)			(328)
Shares issued in connection with equity incentive plans, net of taxes (in shares)		204
Shares issued in connection with equity incentive plans, net of taxes	(1,030)	$ 2	(1,032)
Share-based compensation expense	2,444		2,444
Shares issued for Deferred Compensation Plan, net	519		448			71
Shares issued for Employee Stock Purchase Plan	989		(216)			1,205
Other	$ 62				62
Ending balance (in shares) at Mar. 31, 2024	73,646	76,533
Ending balance at Mar. 31, 2024	$ 474,581	$ 765	$ 312,080	$ (2,172)	$ 200,381	$ (36,473)