Note 5: Other Real Estate Owned: Schedule of Major Classifications of Foreclosed Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Foreclosed Assets	$ 5,480	$ 16,575
Foreclosed assets held for sale and repossessions | Other real estate owned not acquired through foreclosure
Foreclosed Assets	1,559	1,628
Foreclosed assets held for sale and repossessions | Other real estate owned and repossessions
Foreclosed Assets	8,440	22,002
Foreclosed assets held for sale and repossessions | Acquired foreclosed assets no longer covered by FDIC loss sharing agreements, net of discounts
Foreclosed Assets	167	2,133
Foreclosed assets held for sale and repossessions | Acquired foreclosed assets no longer covered by FDIC loss sharing agreements, net of discounts | Valley Bank
Foreclosed Assets	1,234	1,666
Foreclosed assets held for sale and repossessions | Foreclosed assets held for sale and repossessions, net
Foreclosed Assets	6,881	20,374
Foreclosed assets held for sale and repossessions | Land and Land Improvements
Foreclosed Assets	3,191	7,229
Foreclosed assets held for sale and repossessions | One- to four-family residential construction
Foreclosed Assets	0	0
Foreclosed assets held for sale and repossessions | Subdivision construction
Foreclosed Assets	1,092	5,413
Foreclosed assets held for sale and repossessions | Commercial construction
Foreclosed Assets	0	0
Foreclosed assets held for sale and repossessions | One- to four-family residential
Foreclosed Assets	269	112
Foreclosed assets held for sale and repossessions | Other residential
Foreclosed Assets	0	140
Foreclosed assets held for sale and repossessions | Commercial Real Estate
Foreclosed Assets	0	1,694
Foreclosed assets held for sale and repossessions | Commercial business
Foreclosed Assets	0	0
Foreclosed assets held for sale and repossessions | Consumer Loan
Foreclosed Assets	$ 928	$ 1,987