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Mortgage Loan Servicing and Loans Originated for Sale (Loans Sold) (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Servicing Assets at Amortized Value [Line Items]      
Proceeds from Sale of Loans Held-for-sale $ 1,973,599 $ 1,994,221 $ 2,409,914
Servicing - released [Member]      
Servicing Assets at Amortized Value [Line Items]      
Proceeds from Sale of Loans Held-for-sale 1,935,349 1,948,423 2,392,251
Servicing - retained [Member]      
Servicing Assets at Amortized Value [Line Items]      
Proceeds from Sale of Loans Held-for-sale $ 38,250 $ 45,798 $ 17,663