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Derivatives (Detail Textuals) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2011 | Jan. 04, 2014
Derivative [Line Items] |  |
Changes associated with the ineffective interest rate swap | $ 1,676 |
Interest rate swap |  |
Derivative [Line Items] |  |
Fair value of interest swap liability | 0 | 0
Changes associated with the ineffective interest rate swap | 1,700 |
Amortization of remaining accumulated other comprehensive loss of ineffective swap | 500 |
Portion of net income related to reducing fair value of ineffective interest rate swap liability | $ 2,200 |

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