CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Retained Earnings (Deficit)	Retained Earnings (Deficit) Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of accounting change		$ (678)				$ (678)
Beginning balance (in shares) at Dec. 31, 2019			126,110,000					(55,513)
Beginning balance at Dec. 31, 2019	$ 935,318		$ 1,261	$ 1,248,787	$ (281,229)		$ (32,398)	$ (1,103)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock purchases (in shares)								(37,794)
Treasury stock purchases	(327)							$ (327)
Retirement of treasury shares (in shares)			(38,206)					38,206
Retirement of treasury shares	0		$ (1)	(328)				$ 329
Issuance of restricted stock (in shares)			95,851
Issuance of restricted stock	$ 0		$ 1	(1)
Stock options exercised (in shares)	0
Other comprehensive income (loss)	$ (47,739)						(47,739)
Deferred compensation obligation	0		$ 1	(593)				$ 592
Deferred compensation obligation (in shares)								29,769
Share-based compensation	3,387			3,387
Net loss	(542,073)				(542,073)
Ending balance (in shares) at Apr. 04, 2020			126,167,645					(25,332)
Ending balance at Apr. 04, 2020	347,888		$ 1,262	1,251,252	(823,980)		(80,137)	$ (509)
Beginning balance (in shares) at Dec. 31, 2019			126,110,000					(55,513)
Beginning balance at Dec. 31, 2019	$ 935,318		$ 1,261	1,248,787	(281,229)		(32,398)	$ (1,103)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Ending balance (in shares) at Dec. 31, 2020			125,425,931					(25,332)
Ending balance at Dec. 31, 2020	$ 441,805		$ 1,255	1,257,262	(764,685)		(51,517)	$ (510)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury stock purchases (in shares)								(111,868)
Treasury stock purchases	(1,541)							$ (1,541)
Retirement of treasury shares (in shares)			(1,576)					1,576
Retirement of treasury shares	0		$ 0	(15)				$ 15
Issuance of restricted stock (in shares)			338,939
Issuance of restricted stock	$ 0		$ 3	(3)
Stock options exercised (in shares)	44,000,000		44,361
Stock options exercised	$ 486			486
Other comprehensive income (loss)	15,250						15,250
Deferred compensation obligation	0		$ 0	(86)				$ 86
Deferred compensation obligation (in shares)								4,261
Share-based compensation	3,302			3,302
Net loss	(1,655)				(1,655)
Ending balance (in shares) at Apr. 03, 2021			125,807,655					(131,363)
Ending balance at Apr. 03, 2021	$ 457,647		$ 1,258	$ 1,260,946	$ (766,340)		$ (36,267)	$ (1,950)