Annual report pursuant to Section 13 and 15(d)

OTHER BORROWINGS (Additional Information) (Detail)

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OTHER BORROWINGS (Additional Information) (Detail) (USD $)
In Thousands, unless otherwise specified
Nov. 30, 2012
Short-term Debt [Line Items]  
Other Borrowings $ 20,000us-gaap_OtherBorrowings
Other Borrowings To Subordinated Notes Percentage 5.50%sfbs_OtherBorrowingsToSubordinatedNotesPercentage