Note 6: Deposits: Aggregate Amount of Deposits With Minimum Denominations of $100,000 (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Details
Deposits with Minimum Denominations of $500,000	$ 239,800	$ 171,700

Represents the monetary amount of Deposits with Minimum Denominations of $500,000, as of the indicated date.

No definition available.

Name:	smbc_DepositsWithMinimumDenominationsOf500000
Namespace Prefix:	smbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant