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Long Term Debt Agreement (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Bank Borrowings And Capital Lease Obligations [Abstract]
Long-term debt	$ 6,582
Effective interest rate on long-term debt	2.63%

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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