Derivative Instruments and Hedging Activities Part 2 (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated OCI (Effective Portion), Net of Tax - noncontrolling portion	$ 675,000
Open futures contracts to purchase commodities on related fixed price sales order	21,100,000
Fair value of futures contracts loss position	679,000
Recorded restricted cash related to open future contracts	1,900,000
Commodity contracts [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Accumulated OCI (Effective Portion), Net of Tax	(427,000)	1,684,000
Commodity contracts [Member] | Cash Flow Hedging [Member] | Cost of goods sold [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Gain) Loss Reclassified from Accumulated OCI into Income (Effective Portion), Net of Tax	(561,000)	(1,308,000)
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	4,509,000
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	$ (4,344,000)