(13) Fair Value of Financial Instruments Fair Value of Financial Instruments, Fair Value Measure on Recurring Basis (Details) (Fair Value, Measurements, Recurring [Member], Fair Value Hedging [Member], Designated as Hedging Instrument [Member], Interest Rate Swap [Member], USD $) In Thousands, unless otherwise specified	Jan. 01, 2012
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	$ 0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps	$ 0