Derivative Instruments Located on Consolidated Balance Sheet (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 06, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 6,718	$ 61
Derivative Liabilities	2,510	9,121
Interest Rate Contracts | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	1,436	2,639
Interest Rate Contracts | Other LongTerm Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities		765
Commodity Contract | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	970	5,439
Commodity Contract | Other LongTerm Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	104	278
Commodity Contract | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	6,693
Commodity Contract | Other Long Term Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 25	$ 61