Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: FDIC Indemnification Asset Roll Forward (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
TeamBank Loans
Initial basis for loss sharing determination, net of activity since acquisition date	$ 13,668	$ 18,838
Reclassification from nonaccretable discount to accretable discount due to change in expected losses (net of accretion to date)	(589)	(846)
Original estimated fair value of assets, net of activity since acquisition date	(12,948)	(17,833)
Expected loss remaining	131	159
TeamBank Foreclosed Assets
Initial basis for loss sharing determination, net of activity since acquisition date	35	14
Reclassification from nonaccretable discount to accretable discount due to change in expected losses (net of accretion to date)	0	0
Original estimated fair value of assets, net of activity since acquisition date	(35)	(14)
Expected loss remaining	$ 0	$ 0