Derivative Instruments and Hedging Activities Part 2 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014	Dec. 27, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Restricted cash in other current assets as collateral related to open derivative contracts	$ 1,700		$ 1,700		$ 500
Commodity Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Deferred net gains (losses), net of tax, included in AOCI	(1,300)		(1,300)
Commodity Contracts [Member] | Not Designated as Hedging Instrument [Member] | Cost of Goods Sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain on undesignated derivatives	1,143	$ 0	2,422	$ 1,466
Commodity Contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax	(2,046)	(202)	(2,931)	(634)
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	1,708	(174)	2,198	285
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	1,831	1,100	3,300	7,371
Foreign Currency Contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax	(7)	(181)	(59)	(184)
Foreign Currency Contracts [Member] | Cash Flow Hedging [Member] | Depreciation Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Gain) Loss Reclassified from AOCI (Effective Portion), Net of Tax	0	(46)	0	(283)
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	(1,943)	(922)	(3,593)	(6,702)
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 200,000		$ 200,000
Period of interest rate swap			2 years
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	$ (1,800)		$ (1,800)
Interest Rate Swap [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax	(632)	430	(1,397)	(837)
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	$ 0	189	0
Other [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Loss) Gain Recognized in AOCI (Effective Portion), Net of Tax			(16)	3
(Gain) Loss Reclassified from AOCI (Effective Portion), Net of Tax			$ 0	$ 0