CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjustment	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance (in shares) at Dec. 31, 2019				91,875
Beginning balance at Dec. 31, 2019	$ 252,446,000			$ 92,000		$ 2,327,359,000			$ (2,071,940,000)			$ (3,065,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(29,271,000)								(29,271,000)
Other comprehensive income (loss), net of tax	8,921,000											8,921,000
Issuance of common stock under stock option, award and purchase plans, net (in shares)				3,822
Issuance of common stock under stock option, award and purchase plans, net	3,810,000			$ 3,000		3,807,000
Repurchase of common stock	0
Stock-based compensation	18,034,000					18,034,000
Exercise of warrant (in shares)				2,413
Exercise of warrant	0			$ 2,000		(2,000)
Reclassification from mezzanine equity to equity for 2020 Notes	2,410,000					2,410,000
Conversion feature of 2022 Notes	8,254,000					8,254,000
Conversion feature of exchanged portion of 2020 Notes	(6,909,000)					(6,909,000)
Issuance of common stock upon conversion of notes (in shares)				94
Issuance of common stock upon conversion of notes	607,000			$ 1,000		606,000
Ending balance (in shares) at Dec. 31, 2020				98,204
Ending balance at Dec. 31, 2020	$ 258,302,000			$ 98,000		2,353,559,000			(2,101,211,000)			5,856,000
Accounting Standards Update [Extensible List]	Accounting Standards Update 2020-06
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 13,254,000								13,254,000
Other comprehensive income (loss), net of tax	(9,128,000)											(9,128,000)
Issuance of common stock under stock option, award and purchase plans, net (in shares)				4,755
Issuance of common stock under stock option, award and purchase plans, net	10,249,000			$ 5,000		10,244,000
Repurchase of common stock	0
Stock-based compensation	24,119,000					24,119,000
Reclassification from equity to mezzanine equity for 2022 Notes	$ (883,000)					(883,000)
Ending balance (in shares) at Dec. 31, 2021	102,959			102,959	102,959
Ending balance at Dec. 31, 2021	$ 295,913,000	$ (13,910,000)	$ 282,003,000	$ 103,000	$ 103,000	2,387,039,000	$ (32,249,000)	$ 2,354,790,000	(2,087,957,000)	$ 18,339,000	$ (2,069,618,000)	(3,272,000)	$ (3,272,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	28,182,000								28,182,000
Other comprehensive income (loss), net of tax	(6,414,000)											(6,414,000)
Issuance of common stock under stock option, award and purchase plans, net (in shares)				3,601
Issuance of common stock under stock option, award and purchase plans, net	$ 791,000			$ 4,000		787,000
Repurchase of common stock (in shares)	(600)			(571)
Repurchase of common stock	$ (5,134,000)			$ (1,000)					(5,133,000)
Stock-based compensation	25,078,000					25,078,000
Issuance of common stock upon conversion of notes (in shares)				3,882
Issuance of common stock upon conversion of notes	$ 0			$ 4,000		(4,000)
Ending balance (in shares) at Dec. 31, 2022	109,871			109,871
Ending balance at Dec. 31, 2022	$ 324,506,000			$ 110,000		$ 2,380,651,000			$ (2,046,569,000)			$ (9,686,000)