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Long-Term Debt (Details) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2013	Dec. 31, 2012
Composition of the Partnership's long-term debt
Long-term debt	$ 4,976	$ 5,503
7.28% Note payable collateralized by real estate [Member]
Composition of the Partnership's long-term debt
Long-term debt	$ 4,976	$ 5,503

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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