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Mortgage Loan Servicing and Loans Originated for Sale (Loans Held for Sale) (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Jun. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans held for sale, at fair value $ 116,548 $ 189,458
Fixed rate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans held for sale, at fair value 115,703 186,203
Adjustable Rate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans held for sale, at fair value $ 845 $ 3,255