Note 1: Nature of Operations and Summary of Significant Accounting Policies: Restriction On Cash and Due From Banks (Policies)	12 Months Ended
Dec. 31, 2017
Policies
Restriction On Cash and Due From Banks	Restriction on Cash and Due From Banks The Bank is required to maintain reserve funds in cash and/or on deposit with the Federal Reserve Bank. The reserve required at December 31, 2017 and 2016, respectively, was $59.1 million and $53.8 million.

Represents the textual narrative disclosure of Restriction On Cash and Due From Banks, during the indicated time period.

No definition available.

Name:	fil_RestrictionsOnCashAndDueFromBanksPolicyTextBlock
Namespace Prefix:	fil_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration