Segment Information - Reconciliation of Net Income to EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Other Significant Reconciling Item, Consolidated
Net income	$ 7,796	$ 17,042	$ 22,356	$ 15,777	$ 38,090	$ 28,637	$ 34,776	$ 40,404	$ 62,971	$ 141,907	$ 8,122
Equity earnings in non-consolidated entities									0	(738)	(3,639)
Income tax expense (benefit)									57,074	(10,058)	137,818
Depreciation and amortization									133,969	125,100	111,273
Interest expense, net									71,778	70,818	79,034
Impairment and restructuring charges(2)									22,748	17,328	13,057
Gain on previously held shares of equity investment								$ (20,800)	0	(20,767)	0
Loss (gain) on sale of property and equipment									1,959	144	(299)
Stock-based compensation									13,315	15,052	19,785
Non-cash foreign exchange transaction/translation (income) loss									3,438	(1,267)	(1,178)
Other items									47,482	117,546	47,000
Other non-cash items									304	3,859	526
Costs relating to debt restructuring and debt refinancing									0	294	23,663
Adjusted EBITDA									$ 415,038	$ 459,218	$ 435,162