Derivative Instruments and Hedging Activities Part 2 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2016	Sep. 26, 2015	Oct. 01, 2016	Sep. 26, 2015	Dec. 26, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Restricted cash in other current assets as collateral related to open derivative contracts	$ 1,400		$ 1,400		$ 2,600
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax	(1,009)	$ (2,685)	1,446	$ (4,403)
(Gain) Loss Reclassified from AOCI (Effective Portion), Net of Tax	870	1,770	(291)	2,387
Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Deferred net gains (losses), net of tax, included in AOCI	350		350
Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member] | Cost of Goods Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain on commodity contracts (non-qualifying)	855	1,143	2,676	2,422
Commodity Contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax	(1,434)	(2,046)	1,903	(2,931)
Commodity Contracts [Member] | Cash Flow Hedging [Member] | Cost of Goods Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Gain) Loss Reclassified from AOCI (Effective Portion), Net of Tax	814	1,708	(477)	2,198
Commodity Contracts [Member] | Fair Value Hedging [Member] | Cost of Goods Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on the derivatives in designated and qualifying fair value hedges	(37)	1,831	(420)	3,300
Inventory [Member] | Fair Value Hedging [Member] | Cost of Goods Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on the derivatives in designated and qualifying fair value hedges	31	(1,943)	$ 382	(3,593)
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Period of interest rate swap			2 years
Notional amount	$ 200,000		$ 200,000
Interest rate swap, fixed interest rate	1.40%		1.40%
Term loan facility, all-in fixed interest rate	2.70%		2.70%
Interest rate swap maturity date			Dec. 11, 2017
Deferred net gains (losses), net of tax, included in AOCI	$ (1,000)		$ (1,000)
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax	457	(632)	(128)	(1,397)
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Gain) Loss Reclassified from AOCI (Effective Portion), Net of Tax	58	58	186	189
Other [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax	(32)	(7)	(329)	(75)
(Gain) Loss Reclassified from AOCI (Effective Portion), Net of Tax	$ (2)	$ 4	$ 0	$ 0