Note 8: Loss Sharing Agreements and FDIC Indemnification Assets: Schedule of Impact of Acquired Loans on Financial Results (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Impact of acquired loan pools on net interest income	$ 9,956	$ 14,233	$ 24,136	$ 39,715
Impact of acquired loan pools on net interest margin (in basis points)	109	184	90	171
Impact of acquired loan pools on non-interest income	(8,169)	(12,717)	(19,319)	(35,470)
Net impact of acquired loan pools to pre-tax income	1,787	1,516	4,817	4,245
Net impact of acquired loan pools to net of taxes	$ 1,162	$ 986	$ 3,131	$ 2,759
Impact of acquired loan pools to diluted earnings per common share	$ 0.09	$ 0.07	$ 0.23	$ 0.20