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FHLB Advances and Other Borrowings (Details) - USD ($)
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]      
FHLB borrowings, ratio of maximum borrowing capacity to total assets 35.00%    
Short-term borrowings $ 0 $ 0 $ 0
Pacific Coast Banker's Bank      
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]      
Short-term overnight borrowings, maximum borrowing capacity 10,000,000    
Overnight line of credit, amount outstanding 0 0  
Federal Home Loan Bank Advances      
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]      
Short-term FHLB borrowings, maximum borrowing capacity 45,201,000    
Short-term FHLB advances 0    
Federal Home Loan Bank Advances      
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]      
Long-term FHLB advances $ 45,000,000 $ 45,000,000  
Long-term FHLB borrowings, minimum interest rate 3.69%    
Long-term FHLB borrowings, maximum interest rate 4.34%