Segment Reporting Adjusted EBITDA to Net Income (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended	9 Months Ended
	Jul. 01, 2020	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Adjusted EBITDA		$ 64,134	$ 53,821		$ (21,339)	$ 175,926
Gain on sale of business		2,314	(1,730)		2,314	188,180
Impairment of assets held for sale	$ 85,622	0	0	$ 86,470	86,470	0
Restructuring Charges		(6,186)	(5,572)		(23,236)	(29,214)
Project Costs		0	(335)		(4,234)	(2,003)
Other impairment charges		(100)	(1,958)		(1,240)	(4,146)
Lease termination costs		(83)	(512)		(684)	(1,003)
EBITDA		56,484	43,714		(138,191)	327,740
Income tax expense (benefit)		2,386	(745)		55,485	(47,001)
Interest expense, net of interest income		(17,985)	(10,351)		(40,993)	(33,858)
Depreciation and amortization		(36,504)	(37,495)		(116,727)	(111,968)
Net (Loss) Income Attributable to Parent		4,381	(4,877)		(240,426)	134,913
Noncontrolling Interest [Member]
Gain on sale of business		(3,595)	$ 0		(3,595)	$ 0
Corporate Joint Venture [Member]
Gain on sale of business		1,334
Parent [Member]
Other impairment charges		$ (100)			$ (947)