Note 8: Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Business Acquisition Sun Security Bank (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Sun Security Bank Loans
Initial basis for loss sharing determination, net of activity since acquisition date	$ 143,853	$ 217,549
Non-credit premium (discount), net of activity since acquisition date	(1,506)	(2,658)
Reclassification from nonaccretable discount to accretable discount due to change in expected losses (net of accretion to date)	(1,571)
Original estimated fair value of assets, net of activity since acquisition date	(101,951)	(144,626)
Expected loss remaining	38,825	70,265
Assumed loss sharing recovery percentage	76.00%	79.00%
Estimated loss sharing value	29,664	55,382
Indemnification assets to be amortized resulting from change in expected losses	1,224
Accretable discount on FDIC indemnification asset	(3,284)	(5,457)
Total FDIC indemnification asset	27,604	49,925
Sun Security Bank Foreclosed Assets
Initial basis for loss sharing determination, net of activity since acquisition date	10,224	20,964
Original estimated fair value of assets, net of activity since acquisition date	(5,641)	(8,338)
Expected loss remaining	4,583	12,626
Assumed loss sharing recovery percentage	81.00%	80.00%
Estimated loss sharing value	3,698	10,101
Accretable discount on FDIC indemnification asset	(561)	(1,811)
Total FDIC indemnification asset	$ 3,137	$ 8,290