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Note 11: Federal Reserve Bank Borrowings: Federal Reserve Bank Borrowings Policy (Details) (Federal Home Loan Bank Borrowings, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Federal Home Loan Bank Borrowings
   
Long-term Line of Credit $ 563,200us-gaap_LineOfCredit
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankBorrowingsMember
$ 418,900us-gaap_LineOfCredit
/ us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis
= us-gaap_FederalHomeLoanBankBorrowingsMember