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Short-term Borrowings/Other Borrowings (Details) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Short-term Debt [Line Items]    
Short-term debt outstanding $ 0 $ 0
Federal Reserve Bank of San Francisco [Member]
   
Short-term Debt [Line Items]    
Unused borrowing lines 289,806,000 254,761,000
Short-term Debt   254,761,000
Qualifying loans pledged as collateral for borrowing lines 404,438,000 334,299,000
Federal Home Loan Bank (FHLB) [Member]
   
Short-term Debt [Line Items]    
Short-term Debt 6,092,000 7,094,000
Investment securities pledged as collateral 6,421,000 7,468,000
Pacific Coast Bankers Bank [Member]
   
Short-term Debt [Line Items]    
Unused borrowing lines   $ 10,000,000