Regulatory Matters (Details Textual) (USD $)	12 Months Ended
Dec. 31, 2012 Capital_Category
Regulatory Matters (Textual) [Abstract]
Number of capital categories	5
Maximum standards FDIC deposit insurance amount	$ 250,000

Amount of deposit insurance coverage provided by the FDIC.

No definition available.

Name:	somc_FdicDepositInsuranceCoverage
Namespace Prefix:	somc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant