Annual report pursuant to Section 13 and 15(d)

DEPOSITS (Additional Information) (Detail)

v2.4.1.9
DEPOSITS (Additional Information) (Detail) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Deposits [Line Items]    
Overdraft Deposit Reclassification $ 3,544,000sfbs_OverdraftDepositReclassification $ 1,602,000sfbs_OverdraftDepositReclassification