Note 8: Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Business Acquisition InterBank (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Apr. 27, 2012
InterBank Loans
Initial basis for loss sharing determination, net of activity since acquisition date	$ 370,853	$ 393,274
Non-credit premium (discount), net of activity since acquisition date	2,978	3,105
Original estimated fair value of assets, net of activity since acquisition date	(269,889)	(285,458)
Expected loss remaining	103,942	110,921
Assumed loss sharing recovery percentage	81.00%	81.00%
Estimated loss sharing value	84,087	89,669
Accretable discount on FDIC indemnification asset	(7,811)	(8,411)
Total FDIC indemnification asset	76,276	81,258
InterBank Foreclosed Assets
Initial basis for loss sharing determination, net of activity since acquisition date	3,410	9,908
Original estimated fair value of assets, net of activity since acquisition date	(2,849)	(6,216)
Expected loss remaining	561	3,692
Assumed loss sharing recovery percentage	80.00%	80.00%
Estimated loss sharing value	449	2,954
Accretable discount on FDIC indemnification asset	(93)	(223)
Total FDIC indemnification asset	$ 356	$ 2,731