Note 4: Acquired Loans, Loss Sharing Agreements and FDIC Indemnification Assets: Business Combinations Policy (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Valley Bank
Discount Recorded in Conjunction with Fair Value of Acquired Loans and Amount Accreted to Yield	$ 217	$ 491	$ 794

Represents the monetary amount of Discount Recorded in Conjunction with Fair Value of Acquired Loans and Amount Accreted to Yield, during the indicated time period.

No definition available.

Name:	fil_DiscountRecordedInConjunctionWithFairValueOfAcquiredLoansAndAmountAccretedToYield
Namespace Prefix:	fil_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration