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Notes Payable and Revolving Credit Agreement (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Summary of aggregate annual payments of principal required to revolving credit facility
During the twelve months ended September 30, 2013	$ 609
During the twelve months ended September 30, 2014	175
During the twelve months ended September 30, 2015	16,100
Payments, Total	$ 16,884	$ 24,217

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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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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year.

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