Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Common Stock	Additional Paid-in Capital
Beginning balance at Dec. 31, 2020	$ 828,233	$ 656,740	$ 4,173	$ 2,160	$ 165,160
Beginning balance (in shares) at Dec. 31, 2020				32,372,621
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	23,411	23,411
Other comprehensive loss	(5,624)		(5,624)
Repurchases of common stock	(1,596)			$ (1)	(1,595)
Repurchases of common stock (in shares)				(13,475)
Shares and options issued under stock plans	5,068			$ 6	5,062
Shares and options issued under stock plans (in shares)				92,784
Ending balance at Mar. 31, 2021	849,492	680,151	(1,451)	$ 2,165	168,627
Ending balance (in shares) at Mar. 31, 2021				32,451,930
Beginning balance at Dec. 31, 2021	$ 877,015	732,138	(4,993)	$ 2,154	147,716
Beginning balance (in shares) at Dec. 31, 2021	32,287,150			32,287,150
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	$ 28,930	28,930
Other comprehensive loss	(1,296)		(1,296)
Repurchases of common stock	(34,599)			$ (16)	(34,583)
Repurchases of common stock (in shares)				(245,685)
Dividends	(10)	(10)
Shares and options issued under stock plans	3,642			$ 4	3,638
Shares and options issued under stock plans (in shares)				74,604
Ending balance at Mar. 31, 2022	$ 873,682	$ 761,058	$ (6,289)	$ 2,142	$ 116,771
Ending balance (in shares) at Mar. 31, 2022	32,116,069			32,116,069