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Mortgage Loan Servicing and Loans Originated for Sale (Loans Held for Sale) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans held for sale, at fair value $ 96,298 $ 116,548
Fixed rate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans held for sale, at fair value 94,730 115,703
Adjustable Rate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans held for sale, at fair value $ 1,568 $ 845