Note 1: Organization and Summary of Significant Accounting Policies: Principles of Consolidation Policy (Policies)	12 Months Ended
Jun. 30, 2015
Policies
Principles of Consolidation Policy	Principles of Consolidation. The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, the Bank. All significant intercompany accounts and transactions have been eliminated.

Represents the textual narrative disclosure of Principles of Consolidation Policy, during the indicated time period.

No definition available.

Name:	smbc_PrinciplesOfConsolidationPolicyTextBlock
Namespace Prefix:	smbc_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration