CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balances at beginning of period at Dec. 31, 2019	$ (155,085)	$ 430	$ 1,027,824	$ (1,179,409)	$ 0	$ (3,930)
Balances at beginning of period (in shares) at Dec. 31, 2019		43,150			0
Stock issued pursuant to employee stock plans	$ (1,818)	$ 12	(1,830)		$ 0
Stock issued pursuant to employee stock plans (in shares)	1,270				0
Stock-based compensation	$ 10,664		10,664
Net (loss) income	11,062			11,062
Other comprehensive income (loss)	2,253					2,253
Balances at end of period at Dec. 31, 2020	(132,924)	$ 442	1,036,658	(1,168,347)	$ 0	(1,677)
Balances at end of period (in shares) at Dec. 31, 2020		44,420			0
Stock repurchased	(25,090)				$ (25,090)
Stock issued pursuant to employee stock plans	$ (18,749)	$ 13	(18,762)
Stock issued pursuant to employee stock plans (in shares)	1,408
Stock-based compensation	$ 13,737		13,737
Repurchase of common stock (in shares)					(874)
Net (loss) income	41,388
Other comprehensive income (loss)	(2,436)					(2,436)
Balances at end of period at Dec. 31, 2021	$ (124,074)	$ 455	1,031,633	(1,126,959)	$ (25,090)	(4,113)
Balances at end of period (in shares) at Dec. 31, 2021	44,954	45,828			(874)
Stock repurchased	$ (52,843)				$ (52,843)
Stock issued pursuant to employee stock plans	$ (11,894)	$ 7	(11,901)
Stock issued pursuant to employee stock plans (in shares)	853
Stock-based compensation	$ 16,555		16,555
Repurchase of common stock (in shares)					(2,037)
Net (loss) income	55,241
Other comprehensive income (loss)	(1,767)					(1,767)
Balances at end of period at Dec. 31, 2022	$ (118,782)	$ 462	$ 1,036,287	$ (1,071,718)	$ (77,933)	$ (5,880)
Balances at end of period (in shares) at Dec. 31, 2022	43,771	46,681			(2,911)