Note 1: Organization and Summary of Significant Accounting Policies: Cash and Cash Equivalents, Policy (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Details
Cash Due and Interest-Bearing Deposits in Other Depository Institutions	$ 6,600	$ 8,600

Represents the monetary amount of Cash Due and Interest-Bearing Deposits in Other Depository Institutions, as of the indicated date.

No definition available.

Name:	smbc_CashDueAndInterestBearingDepositsInOtherDepositoryInstitutions
Namespace Prefix:	smbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant