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Investments (Details 10) (USD $)
Sep. 30, 2012
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities [Abstract]  
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Outstanding Balance $ 36,090,000
Certain Loans Acquired in Transfer Accounted for as Available-for-sale Debt Securities, Carrying Amount, Net $ 31,196,000