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Mortgage Servicing - Schedule of Estimated Amortization Expense for MSRs (Details) - Mortgage Servicing Rights - Amortized Costs [Member]
$ in Thousands
Dec. 31, 2015
USD ($)
Servicing Asset at Amortized Cost [Line Items]  
2016 $ 46,723
2017 36,427
2018 38,564
2019 38,773
2020 $ 34,425