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Mortgage Loan Servicing and Loans Originated for Sale (Loans Serviced for Others) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Servicing Assets at Amortized Value [Line Items]      
Loans serviced for others $ 128,409 $ 119,304 $ 105,469
Freddie Mac [Member]      
Servicing Assets at Amortized Value [Line Items]      
Loans serviced for others 19,244 13,907 6,819
Fannie Mae [Member]      
Servicing Assets at Amortized Value [Line Items]      
Loans serviced for others 96,384 90,076 78,250
FHLB - San Francisco [Member]      
Servicing Assets at Amortized Value [Line Items]      
Loans serviced for others 11,786 15,105 20,385
Other Investors      
Servicing Assets at Amortized Value [Line Items]      
Loans serviced for others $ 995 $ 216 $ 15