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Capital Notes (Details) (USD $)
3 Months Ended 12 Months Ended
Sep. 30, 2012
Dec. 31, 2012
Capital Notes [Line Items]    
Capital notes issued $ 10,000,000  
Debt instrument, interest rate, stated percentage   6.00%
Duration of written notice to holders   30 days
Payment on maturity principal   $ 7,000,000
Capital Notes, 6%, Due 4/1/2017 [Member]
   
Capital Notes [Line Items]    
Debt instrument, maturity date   Apr. 01, 2017