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DEPOSITS - Additional Information (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Overdraft Deposit Reclassification	$ 3,860,000	$ 876,000

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- Definition

The overdraft deposits reclassifeid to loan.

+ References

No definition available.

+ Details

Name:	svfb_OverdraftDepositReclassification
Namespace Prefix:	svfb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant