Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Sun Security Bank FDIC Indemnification Asset (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
FDIC indemnification asset	$ 117,263	$ 108,004
Sun Security Bank | Loans
Initial basis for loss sharing determination, net of activity since acquisition date	126,933	217,549
Non-credit premium (discount), net of activity since acquisition date	(1,079)	(2,658)
Reclassification from nonaccretable discount to accretable discount due to change in expected losses (net of accretion to date)	(4,182)
Original estimated fair value of assets, net of activity since acquisition date	(91,519)	(144,626)
Expected loss remaining	30,153	70,265
Assumed loss sharing recovery percentage	76.00%	79.00%
Estimated loss sharing value	23,017	55,382
Indemnification assets to be amortized resulting from change in expected losses	3,345
Accretable discount on FDIC indemnification asset	(2,867)	(5,457)
FDIC indemnification asset	23,495	49,925
Sun Security Bank | Foreclosed Assets
Initial basis for loss sharing determination, net of activity since acquisition date	10,980	20,964
Original estimated fair value of assets, net of activity since acquisition date	(6,227)	(8,338)
Expected loss remaining	4,753	12,626
Assumed loss sharing recovery percentage	80.00%	80.00%
Estimated loss sharing value	3,785	10,101
Accretable discount on FDIC indemnification asset	(561)	(1,811)
FDIC indemnification asset	$ 3,224	$ 8,290