Shareholders' Deficit - Components of Accumulated Other Comprehensive Loss (Details) $ in Thousands	3 Months Ended
Mar. 25, 2020 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance as of beginning of period	$ (138,064)
Net change in fair value of derivatives	(44,723)
Income tax (expense) benefit related to items of other comprehensive loss	11,703
Balance as of end of period	(200,492)
Defined Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance as of beginning of period	(781)
Reclassification	23
Income tax (expense) benefit related to items of other comprehensive loss	(6)
Balance as of end of period	(764)
Derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance as of beginning of period	(33,179)
Derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Reclassification	325
Net change in fair value of derivatives	(44,723)
Income tax (expense) benefit related to items of other comprehensive loss	11,709
Balance as of end of period	(65,868)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance as of beginning of period	(33,960)
Balance as of end of period	$ (66,632)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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