Note 2: Investments in Securities: Schedule of Available-for-sale Securities Reconciliation (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Available-for-sale Securities, Amortized Cost Basis	$ 243,603
Available for Sale Securities Fair Value	243,968
Available-for-sale Securities
Available-for-sale Securities, Amortized Cost Basis	243,603	$ 177,230
Available for Sale Securities Gross Unrealized Gain	2,950	3,587
Available for Sale Securities Gross Unrealized Losses	2,585	1,638
Available for Sale Securities Fair Value	243,968	179,179
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Available-for-sale Securities, Amortized Cost Basis	154,557	123,300
Available for Sale Securities Gross Unrealized Gain	1,272	871
Available for Sale Securities Gross Unrealized Losses	2,571	1,638
Available for Sale Securities Fair Value	153,258	122,533
Collateralized Mortgage Obligations
Available-for-sale Securities, Amortized Cost Basis	39,024
Available for Sale Securities Gross Unrealized Gain	250
Available for Sale Securities Gross Unrealized Losses	14
Available for Sale Securities Fair Value	39,260
US States and Political Subdivisions Debt Securities
Available-for-sale Securities, Amortized Cost Basis	50,022	53,930
Available for Sale Securities Gross Unrealized Gain	1,428	2,716
Available for Sale Securities Gross Unrealized Losses	0	0
Available for Sale Securities Fair Value	$ 51,450	$ 56,646