Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect of Recent Accounting Pronouncements [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Retained Earnings (Deficit) [Member]	Accumulated Retained Earnings (Deficit) [Member] Cumulative Effect of Recent Accounting Pronouncements [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
BALANCE - value at Dec. 31, 2018	$ 214,928	$ 2,802	$ 6	$ (1,433)	$ 295,135	$ (74,971)	$ 2,802	$ (3,809)
BALANCE - shares at Dec. 31, 2018			62,830	(278)
Share-based compensation, value	8,395				8,395
Share-based compensation, shares			73
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(5,008)				(5,008)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares			873
Exercise of stock options and purchases from employee stock purchase plan, value	4,839				4,839
Exercise of stock options and purchases from employee stock purchase plan, shares			785
Cancellation of treasury stock, value				$ 1,433	(1,172)	(261)
Cancellation of treasury stock, shares			(278)	278
Net income	49,339					49,339
Other comprehensive income—net of tax	4,104							4,104
BALANCE - value at Dec. 31, 2019	279,399		$ 6		302,189	(23,091)		295
BALANCE - shares at Dec. 31, 2019			64,283
Share-based compensation, value	6,754				6,754
Share-based compensation, shares			94
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(4,748)				(4,748)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares			741
Exercise of stock options and purchases from employee stock purchase plan, value	2,360				2,360
Exercise of stock options and purchases from employee stock purchase plan, shares			331
Repurchase of common stock, value	(3,873)				(1,798)	(2,075)
Repurchase of common stock, shares			(426)
Net income	66,103					66,103
Other comprehensive income—net of tax	673							673
BALANCE - value at Dec. 31, 2020	346,668		$ 6		304,757	40,937		968
BALANCE - shares at Dec. 31, 2020			65,023
Share-based compensation, value	5,188				5,188
Share-based compensation, shares			35
Vesting of restricted stock units, including impact of shares withheld for taxes, value	(3,785)				(3,785)
Vesting of restricted stock units, including impact of shares withheld for taxes, shares			431
Exercise of stock options and purchases from employee stock purchase plan, value	$ 2,322				2,322
Exercise of stock options and purchases from employee stock purchase plan, shares	173		257
Net income	$ 49,432					49,432
Other comprehensive income—net of tax	(828)							(828)
BALANCE - value at Dec. 31, 2021	$ 398,997		$ 6		$ 308,482	$ 90,369		$ 140
BALANCE - shares at Dec. 31, 2021			65,746