Derivative Financial Instruments Balance Sheet Location (Details) - USD ($) $ in Thousands	Mar. 27, 2016	Dec. 31, 2015	Mar. 29, 2015
Derivatives, Fair Value [Line Items]
Derivative Liability	$ (27,855)	$ (22,918)	$ (19,252)
Derivative assets (liabilities), at fair value, net	(27,855)	(22,918)	(29,241)
Current derivative liability	0	0	9,989
Designated As Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), at fair value, net	0	22,918	19,252
Not Designated As Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), at fair value, net	(27,855)	0	(9,989)
Interest Rate Swap [Member] \| Designated As Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	0	(22,918)	(19,252)
Interest Rate Swap [Member] \| Not Designated As Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability	(27,855)	0	0
Current derivative liability	0	$ 0	$ 9,989
Cash Flow Hedging [Member] \| Forward-Starting Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	$ 26,000

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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