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Mortgage Servicing Rights, net Estimated Amortization Expense For Future Periods (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months $ 198
Finite-Lived Intangible Assets, Amortization Expense, Year Two 174
Finite-Lived Intangible Assets, Amortization Expense, Year Three 152
Finite-Lived Intangible Assets, Amortization Expense, Year Four 131
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 115