CONSOLDATED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]
Balances at beginning of period (in shares) at Dec. 31, 2020		44,420,000				0
Balances at beginning of period at Dec. 31, 2020	$ (132,924)	$ 442	$ 1,036,658	$ (1,168,347)	$ (1,677)	$ 0
Stock issued pursuant to employee stock plans (in shares)		592,000
Stock issued pursuant to employee stock plans, net of shares withheld for employee tax obligations	(7,706)	$ 6	(7,712)
Stock-based compensation	3,122		3,122
Net income	4,391			4,391
Other comprehensive income (loss)	(1,457)				(1,457)
Balances at end of period (in shares) at Mar. 31, 2021		45,012,000				0
Balances at end of period at Mar. 31, 2021	(134,574)	$ 448	1,032,068	(1,163,956)	(3,134)	$ 0
Balances at beginning of period (in shares) at Dec. 31, 2020		44,420,000				0
Balances at beginning of period at Dec. 31, 2020	(132,924)	$ 442	1,036,658	(1,168,347)	(1,677)	$ 0
Net income	26,172
Balances at end of period (in shares) at Sep. 30, 2021						(412,000)
Balances at end of period at Sep. 30, 2021	(126,431)	$ 454	1,030,116	(1,142,175)	(3,657)	$ (11,169)
Balances at beginning of period (in shares) at Mar. 31, 2021		45,012,000				0
Balances at beginning of period at Mar. 31, 2021	(134,574)	$ 448	1,032,068	(1,163,956)	(3,134)	$ 0
Stock issued pursuant to employee stock plans (in shares)		513,000
Stock issued pursuant to employee stock plans, net of shares withheld for employee tax obligations	(5,969)	$ 4	(5,973)
Stock-based compensation	3,580		3,580
Net income	7,006			7,006
Other comprehensive income (loss)	215				215
Balances at end of period (in shares) at Jun. 30, 2021		45,525,000				0
Balances at end of period at Jun. 30, 2021	(129,742)	$ 452	1,029,675	(1,156,950)	(2,919)	$ 0
Stock issued pursuant to employee stock plans (in shares)		168,000
Stock issued pursuant to employee stock plans, net of shares withheld for employee tax obligations	(3,071)	$ 2	(3,073)
Repurchase of common stock (in shares)						(412,000)
Repurchase of common stock	(11,169)					$ (11,169)
Stock-based compensation	3,514		3,514
Net income	14,775			14,775
Other comprehensive income (loss)	(738)				(738)
Balances at end of period (in shares) at Sep. 30, 2021						(412,000)
Balances at end of period at Sep. 30, 2021	$ (126,431)	$ 454	1,030,116	(1,142,175)	(3,657)	$ (11,169)
Shares, Issued		45,693,000
Balances at beginning of period (in shares) at Dec. 31, 2021	44,954,000	45,828,000				(874,000)
Balances at beginning of period at Dec. 31, 2021	$ (124,074)	$ 455	1,031,633	(1,126,959)	(4,113)	$ (25,090)
Stock issued pursuant to employee stock plans (in shares)		391,000
Stock issued pursuant to employee stock plans, net of shares withheld for employee tax obligations	(8,936)	$ 4	(8,940)
Repurchase of common stock (in shares)						(354,000)
Repurchase of common stock	(10,816)					$ (10,816)
Stock-based compensation	3,422		3,422
Net income	10,586			10,586
Other comprehensive income (loss)	(201)				(201)
Balances at end of period (in shares) at Mar. 31, 2022		46,219,000				(1,228,000)
Balances at end of period at Mar. 31, 2022	$ (130,019)	$ 459	1,026,115	(1,116,373)	(4,314)	$ (35,906)
Balances at beginning of period (in shares) at Dec. 31, 2021	44,954,000	45,828,000				(874,000)
Balances at beginning of period at Dec. 31, 2021	$ (124,074)	$ 455	1,031,633	(1,126,959)	(4,113)	$ (25,090)
Net income	$ 29,981
Balances at end of period (in shares) at Sep. 30, 2022	43,926,000	46,472,000				(2,546,000)
Balances at end of period at Sep. 30, 2022	$ (141,401)	$ 461	1,031,232	(1,096,978)	(7,465)	$ (68,651)
Balances at beginning of period (in shares) at Mar. 31, 2022		46,219,000				(1,228,000)
Balances at beginning of period at Mar. 31, 2022	(130,019)	$ 459	1,026,115	(1,116,373)	(4,314)	$ (35,906)
Stock issued pursuant to employee stock plans (in shares)		189,000
Stock issued pursuant to employee stock plans, net of shares withheld for employee tax obligations	(1,481)	$ 2	(1,483)
Repurchase of common stock (in shares)						(560,000)
Repurchase of common stock	(14,143)					$ (14,143)
Stock-based compensation	3,645		3,645
Net income	7,373			7,373
Other comprehensive income (loss)	(1,735)				(1,735)
Balances at end of period (in shares) at Jun. 30, 2022		46,408,000				(1,788,000)
Balances at end of period at Jun. 30, 2022	(136,360)	$ 461	1,028,277	(1,109,000)	(6,049)	$ (50,049)
Stock issued pursuant to employee stock plans (in shares)		64,000
Stock issued pursuant to employee stock plans, net of shares withheld for employee tax obligations	(992)	$ 0	(992)
Repurchase of common stock (in shares)						(758,000)
Repurchase of common stock	(18,602)					$ (18,602)
Stock-based compensation	3,947		3,947
Net income	12,022			12,022
Other comprehensive income (loss)	$ (1,416)				(1,416)
Balances at end of period (in shares) at Sep. 30, 2022	43,926,000	46,472,000				(2,546,000)
Balances at end of period at Sep. 30, 2022	$ (141,401)	$ 461	$ 1,031,232	$ (1,096,978)	$ (7,465)	$ (68,651)