Note 11: Securities Sold Under Reverse Repurchase Agreements and Short-term Borrowings: Schedule of Repurchase Agreements (Details) - Maturity Overnight and on Demand - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Securities Sold under Agreements to Repurchase
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	$ 130,934	$ 113,700
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	121,303	97,498
Federal Home Loan Bank Certificates and Obligations (FHLB)
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	$ 9,631	$ 16,202