Note 8: Other Real Estate Owned: Schedule of Major Classifications of Foreclosed Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Foreclosed Assets Held For Sale | One-to-Four-Family Residential Construction
Foreclosed Assets	$ 0	$ 0
Foreclosed Assets Held For Sale | Subdivision Construction
Foreclosed Assets	2,264	5,413
Foreclosed Assets Held For Sale | Land Development
Foreclosed Assets	4,495	7,229
Foreclosed Assets Held For Sale | Commercial Construction
Foreclosed Assets	0	0
Foreclosed Assets Held For Sale | One-to-Four-Family Residential
Foreclosed Assets	657	112
Foreclosed Assets Held For Sale | Other Residential
Foreclosed Assets	0	140
Foreclosed Assets Held For Sale | Commercial Real Estate
Foreclosed Assets	1,002	1,694
Foreclosed Assets Held For Sale | Commercial Business
Foreclosed Assets	0	0
Foreclosed Assets Held For Sale | Consumer Loan
Foreclosed Assets	1,020	1,987
Foreclosed Assets Held For Sale | Foreclosed Assets Before FDIC-Assisted Acquired Assets
Foreclosed Assets	9,438	16,575
Foreclosed Assets Held For Sale | Foreclosed Assets Acquired Through FDIC-Assisted Transactions, Net of Discount
Foreclosed Assets	1,847	3,799
Foreclosed Assets Held For Sale, Net
Foreclosed Assets	11,285	20,374
Other Real Estate Owned Not Acquired Through Foreclosure
Foreclosed Assets	1,559	1,628
Other real estate owned
Foreclosed Assets	$ 12,844	$ 22,002