Unaudited Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Non-controlling Interest	Total
Beginning Balance at Dec. 31, 2020	$ 38	$ 105,009	$ (2,605)	$ 712,297	$ 601	$ 815,340
Beginning Balance (in shares) at Dec. 31, 2020	38,293
Stock issued from equity plans		(4,645)				(4,645)
Stock issued from equity plans (in shares)	93
Stock-based compensation		5,701				5,701
Dividends declared ($0.10 per share)				(3,854)		(3,854)
Other comprehensive income (loss)			(4,968)			(4,968)
Net income (loss)				38,668	33	38,701
Ending Balance at Mar. 31, 2021	$ 38	106,065	(7,573)	747,111	634	846,275
Ending Balance (in shares) at Mar. 31, 2021	38,386
Beginning Balance at Dec. 31, 2020	$ 38	105,009	(2,605)	712,297	601	815,340
Beginning Balance (in shares) at Dec. 31, 2020	38,293
Share repurchase						(6,503)
Net income (loss)						74,141
Ending Balance at Jun. 30, 2021	$ 38	110,099	(6,538)	772,342	665	876,606
Ending Balance (in shares) at Jun. 30, 2021	38,381
Beginning Balance at Mar. 31, 2021	$ 38	106,065	(7,573)	747,111	634	846,275
Beginning Balance (in shares) at Mar. 31, 2021	38,386
Stock issued from equity plans		956				956
Stock issued from equity plans (in shares)	67
Stock-based compensation		3,277				3,277
Share repurchase		(199)		(6,304)		(6,503)
Share repurchase (in shares)	(72)
Dividends declared ($0.10 per share)				(3,874)		(3,874)
Other comprehensive income (loss)			1,035			1,035
Net income (loss)				35,409	31	35,440
Ending Balance at Jun. 30, 2021	$ 38	110,099	(6,538)	772,342	665	876,606
Ending Balance (in shares) at Jun. 30, 2021	38,381
Beginning Balance at Dec. 31, 2021	$ 38	115,706	(1,216)	756,323	645	$ 871,496
Beginning Balance (in shares) at Dec. 31, 2021	37,589					37,589
Stock issued from equity plans		(2,430)				$ (2,430)
Stock issued from equity plans (in shares)	52
Stock-based compensation		3,906				3,906
Share repurchase		(254)		(6,340)		(6,594)
Share repurchase (in shares)	(82)
Dividends declared ($0.10 per share)				(3,789)		(3,789)
Other comprehensive income (loss)			1,966			1,966
Net income (loss)				36,778	(14)	36,764
Ending Balance at Mar. 31, 2022	$ 38	116,928	750	782,972	631	901,319
Ending Balance (in shares) at Mar. 31, 2022	37,559
Beginning Balance at Dec. 31, 2021	$ 38	115,706	(1,216)	756,323	645	$ 871,496
Beginning Balance (in shares) at Dec. 31, 2021	37,589					37,589
Share repurchase						$ (23,613)
Net income (loss)						81,755
Ending Balance at Jun. 30, 2022	$ 37	121,982	(5,634)	807,843	652	$ 924,880
Ending Balance (in shares) at Jun. 30, 2022	37,392					37,392
Beginning Balance at Mar. 31, 2022	$ 38	116,928	750	782,972	631	$ 901,319
Beginning Balance (in shares) at Mar. 31, 2022	37,559
Stock issued from equity plans		763				763
Stock issued from equity plans (in shares)	63
Stock-based compensation		5,016				5,016
Share repurchase	$ (1)	(725)		(16,293)		(17,019)
Share repurchase (in shares)	(230)
Dividends declared ($0.10 per share)				(3,806)		(3,806)
Other comprehensive income (loss)			(6,384)			(6,384)
Net income (loss)				44,970	21	44,991
Ending Balance at Jun. 30, 2022	$ 37	$ 121,982	$ (5,634)	$ 807,843	$ 652	$ 924,880
Ending Balance (in shares) at Jun. 30, 2022	37,392					37,392