Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Interbank Acquisition Policy: Busdiness Acquisition, InterBank Other Assets Acquired (Details) (InterBank, USD $)	Apr. 27, 2012
Business Acquisition, Other Assets Acquired	$ 79,800,000
Business Acquisition, Liabilities Assumed	458,700,000
Core Deposit Intangible Asset	1,000,000
Cash Received from Federal Deposit Insurance Corporation	40,800,000
Securities Investment
Business Acquisition, Other Assets Acquired	34,900,000
Cash and Cash Equivalents
Business Acquisition, Other Assets Acquired	34,500,000
Foreclosed assets
Business Acquisition, Other Assets Acquired	6,200,000
Investment in Federal Home Loan Bank Stock
Business Acquisition, Other Assets Acquired	585,000
Other Assets
Business Acquisition, Other Assets Acquired	2,600,000
Deposits
Business Acquisition, Liabilities Assumed	456,300,000
Other Liabilities
Business Acquisition, Liabilities Assumed	$ 2,400,000