CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Shares	Additional Paid-In Capital	Retained Earning (Deficit)	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2018	$ 368,255	$ 423,856	$ 46,018	$ (79,092)	$ (22,527)
Balance (in shares) at Dec. 31, 2018		34,886
Consolidated net income	40,773			40,773
Common shares issued for business combination	10,900		10,900
Common shares issued for business combination (in shares)		124
Common shares issued under stock plans	425		425
Common shares issued under stock plans (in shares)		247
Common shares withheld for taxes on vested stock awards	(6,935)		(6,935)
Common shares withheld for taxes on vested stock awards (in shares)		(86)
Repurchases of common shares	(10,000)		(10,000)
Repurchases of common shares (in shares)		(119)
Share-based compensation	9,340		9,340
Other comprehensive income (loss), net of tax	4,414				4,414
Balance at Dec. 31, 2019	417,172	$ 423,856	49,748	(38,319)	(18,113)
Balance (in shares) at Dec. 31, 2019		35,052
Consolidated net income	44,521			44,521
Common shares issued under stock plans	179		179
Common shares issued under stock plans (in shares)		270
Common shares withheld for taxes on vested stock awards	(8,554)		(8,554)
Common shares withheld for taxes on vested stock awards (in shares)		(94)
Repurchases of common shares	(5,500)		(5,500)
Repurchases of common shares (in shares)		(65)
Share-based compensation	23,119		23,119
Other comprehensive income (loss), net of tax	5,872				5,872
Balance at Dec. 31, 2020	476,809	$ 423,856	58,992	6,202	(12,241)
Balance (in shares) at Dec. 31, 2020		35,163
Consolidated net income	50,331			50,331
Common shares issued under stock plans (in shares)		660
Common shares withheld for taxes on vested stock awards	(30,830)		(30,830)
Common shares withheld for taxes on vested stock awards (in shares)		(222)
Share-based compensation	25,606		25,606
Other comprehensive income (loss), net of tax	(625)				(625)
Balance at Dec. 31, 2021	$ 521,291	$ 423,856	$ 53,768	$ 56,533	$ (12,866)
Balance (in shares) at Dec. 31, 2021		35,601