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Mortgage Loan Servicing and Loans Originated for Sale (Loans Serviced for Others) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Servicing Assets at Amortized Value [Line Items]      
Loans serviced for others $ 119,304 $ 105,469 $ 80,058
Freddie Mac [Member]      
Servicing Assets at Amortized Value [Line Items]      
Loans serviced for others 13,907 6,819 4,206
Fannie Mae [Member]      
Servicing Assets at Amortized Value [Line Items]      
Loans serviced for others 90,076 78,250 46,582
FHLB - San Francisco [Member]      
Servicing Assets at Amortized Value [Line Items]      
Loans serviced for others 15,105 20,385 28,222
Other Investors      
Servicing Assets at Amortized Value [Line Items]      
Loans serviced for others $ 216 $ 15 $ 1,048