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Goodwill - Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 424,938		$ 424,938		$ 430,712
Accumulated Amortization	(175,410)		(175,410)		(158,809)
Net	249,528		249,528		$ 271,903
Amortization of Intangible Assets	$ 9,734	$ 11,413	19,689	$ 23,343
Amortizable trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount						$ 101,000
Impairment of Intangible Assets, Finite-lived		55,000		$ 55,000
Impairment of Intangible Assets (Excluding Goodwill)		46,000
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Life	11 years				12 years
Gross Carrying Amount	$ 350,931		350,931		$ 354,305
Accumulated Amortization	(162,429)		(162,429)		(148,632)
Net	$ 188,502		188,502		$ 205,673
Amortizable trade name
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Life	8 years				8 years
Gross Carrying Amount	$ 74,007		74,007		$ 76,407
Accumulated Amortization	(12,981)		(12,981)		(10,177)
Net	$ 61,026		$ 61,026		$ 66,230
Net of Tax [Member] | Amortizable trade name
Finite-Lived Intangible Assets [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)		$ 34,653

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Fair value portion of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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