Fair Value of Financial Instruments, Assests and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 02, 2017	Dec. 25, 2016	Jun. 26, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, assets	$ 4,096	$ 3,736	$ 5,597
Derivatives, assets	25,372	87,894	63,277
Total assets, fair value hierarchy	29,468	91,630	68,874
Derivatives, liabilities	22,244	11,309	13,148
Option Agreement	28,500	28,770	27,560
Total Liabilities	$ 50,744	40,079	40,708
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Investment Redemption, Notice Period	45 days
Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Investment Redemption, Notice Period	60 days
Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Investment Redemption, Notice Period	90 days
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, assets	$ 4,096	3,736	5,597
Derivatives, assets	0	0	0
Total assets, fair value hierarchy	4,096	3,736	5,597
Derivatives, liabilities	0	0	0
Option Agreement	0	0	0
Total Liabilities	0	0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, assets	0	0	0
Derivatives, assets	25,372	87,894	63,277
Total assets, fair value hierarchy	25,372	87,894	63,277
Derivatives, liabilities	22,244	11,309	13,148
Option Agreement	0	0	0
Total Liabilities	22,244	11,309	13,148
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities, assets	0	0	0
Derivatives, assets	0	0	0
Total assets, fair value hierarchy	0	0	0
Derivatives, liabilities	0	0	0
Option Agreement	28,500	28,770	27,560
Total Liabilities	$ 28,500	$ 28,770	$ 27,560