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, common stock (in shares) at Dec. 31, 2020				32,372,621
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	23,411	23,411
Other comprehensive income (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 (cancelled) issued under stock plans (in shares)				92,784
Shares and options issued under stock plans	5,068			$ 6	5,062
Ending balance at Mar. 31, 2021	849,492	680,151	(1,451)	$ 2,165	168,627
Ending balance, common stock (in shares) at Mar. 31, 2021				32,451,930
Beginning balance at Dec. 31, 2020	828,233	656,740	4,173	$ 2,160	165,160
Beginning balance, common stock (in shares) at Dec. 31, 2020				32,372,621
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	46,142
Other comprehensive income (loss)	(3,741)
Ending balance at Jun. 30, 2021	869,642	702,882	432	$ 2,162	164,166
Ending balance, common stock (in shares) at Jun. 30, 2021				32,404,774
Beginning balance at Mar. 31, 2021	849,492	680,151	(1,451)	$ 2,165	168,627
Beginning balance, common stock (in shares) at Mar. 31, 2021				32,451,930
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	22,731	22,731
Other comprehensive income (loss)	1,883		1,883
Repurchases of common stock	(9,240)			$ (5)	(9,235)
Repurchases of common stock (in shares)				(72,649)
Shares and options (cancelled) issued under stock plans (in shares)				25,493
Shares and options issued under stock plans	4,776			$ 2	4,774
Ending balance at Jun. 30, 2021	869,642	702,882	432	$ 2,162	164,166
Ending balance, common stock (in shares) at Jun. 30, 2021				32,404,774
Beginning balance at Dec. 31, 2021	877,015	732,138	(4,993)	$ 2,154	147,716
Beginning balance, common stock (in shares) at Dec. 31, 2021				32,287,150
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	28,930	28,930
Other comprehensive income (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 (cancelled) issued under stock plans (in shares)				74,604
Shares and options issued under stock plans	3,642			$ 4	3,638
Ending balance at Mar. 31, 2022	873,682	761,058	(6,289)	$ 2,142	116,771
Ending balance, common stock (in shares) at Mar. 31, 2022				32,116,069
Beginning balance at Dec. 31, 2021	877,015	732,138	(4,993)	$ 2,154	147,716
Beginning balance, common stock (in shares) at Dec. 31, 2021				32,287,150
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	58,712
Other comprehensive income (loss)	(7,431)
Ending balance at Jun. 30, 2022	901,370	790,840	(12,424)	$ 2,143	120,811
Ending balance, common stock (in shares) at Jun. 30, 2022				32,120,593
Beginning balance at Mar. 31, 2022	873,682	761,058	(6,289)	$ 2,142	116,771
Beginning balance, common stock (in shares) at Mar. 31, 2022				32,116,069
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	29,782	29,782
Other comprehensive income (loss)	(6,135)		(6,135)
Repurchases of common stock	(600)				(600)
Repurchases of common stock (in shares)				(4,976)
Shares and options (cancelled) issued under stock plans (in shares)				9,500
Shares and options issued under stock plans	4,641			$ 1	4,640
Ending balance at Jun. 30, 2022	$ 901,370	$ 790,840	$ (12,424)	$ 2,143	$ 120,811
Ending balance, common stock (in shares) at Jun. 30, 2022				32,120,593