CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ 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, 2020				98,204
Beginning balance at Dec. 31, 2020	$ 258,302			$ 98		$ 2,353,559			$ (2,101,211)			$ 5,856
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(8,133)								(8,133)
Other comprehensive income (loss), net of tax	(3,141)											(3,141)
Issuance of common stock under stock option, award and purchase plans (in shares)				3,590
Issuance of common stock under stock option, award and purchase plans	7,875			$ 4		7,871
Stock-based compensation	12,421					12,421
Ending balance (in shares) at Jul. 02, 2021				101,794
Ending balance at Jul. 02, 2021	267,324			$ 102		2,373,851			(2,109,344)			2,715
Beginning balance (in shares) at Dec. 31, 2020				98,204
Beginning balance at Dec. 31, 2020	$ 258,302			$ 98		2,353,559			(2,101,211)			5,856
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	ASU 2020-06
Ending balance (in shares) at Dec. 31, 2021	102,959			102,959	102,959
Ending balance at Dec. 31, 2021	$ 295,913	$ (13,910)	$ 282,003	$ 103	$ 103	2,387,039	$ (32,249)	$ 2,354,790	(2,087,957)	$ 18,339	$ (2,069,618)	(3,272)	$ (3,272)
Beginning balance (in shares) at Apr. 02, 2021				100,993
Beginning balance at Apr. 02, 2021	259,770			$ 101		2,365,129			(2,107,335)			1,875
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(2,009)								(2,009)
Other comprehensive income (loss), net of tax	840											840
Issuance of common stock under stock option, award and purchase plans (in shares)				801
Issuance of common stock under stock option, award and purchase plans	3,100			$ 1		3,099
Stock-based compensation	4,059					4,059
Reclassification from mezzanine equity to equity for 2022 Notes	1,564					1,564
Ending balance (in shares) at Jul. 02, 2021				101,794
Ending balance at Jul. 02, 2021	$ 267,324			$ 102		2,373,851			(2,109,344)			2,715
Beginning balance (in shares) at Dec. 31, 2021	102,959			102,959	102,959
Beginning balance at Dec. 31, 2021	$ 295,913	$ (13,910)	$ 282,003	$ 103	$ 103	2,387,039	$ (32,249)	$ 2,354,790	(2,087,957)	$ 18,339	$ (2,069,618)	(3,272)	$ (3,272)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	13,311								13,311
Other comprehensive income (loss), net of tax	(9,678)											(9,678)
Issuance of common stock under stock option, award and purchase plans (in shares)				2,659
Issuance of common stock under stock option, award and purchase plans	3,047			$ 2		3,045
Repurchase of common stock (in shares)				(557)
Repurchase of common stock	(5,013)			$ (5,000)					(5,013)
Stock-based compensation	$ 13,166					13,166
Ending balance (in shares) at Jul. 01, 2022	105,061			105,061
Ending balance at Jul. 01, 2022	$ 296,836			$ 105		2,371,001			(2,061,320)			(12,950)
Beginning balance (in shares) at Apr. 01, 2022				104,603
Beginning balance at Apr. 01, 2022	284,653			$ 105		2,362,873			(2,073,288)			(5,037)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	14,840								14,840
Other comprehensive income (loss), net of tax	(7,913)											(7,913)
Issuance of common stock under stock option, award and purchase plans (in shares)				782
Issuance of common stock under stock option, award and purchase plans	2,773					2,773
Repurchase of common stock (in shares)				(324)
Repurchase of common stock	(2,872)								(2,872)
Stock-based compensation	$ 5,355					5,355
Ending balance (in shares) at Jul. 01, 2022	105,061			105,061
Ending balance at Jul. 01, 2022	$ 296,836			$ 105		$ 2,371,001			$ (2,061,320)			$ (12,950)