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Mortgage Servicing Rights - Summary of Transaction Resulted in Net Loss - (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Transfers And Servicing [Abstract]  
Gain on sale $ 3,406
Transaction costs (2,284)
Loss on fair value hedge on sale (5,569)
Net loss on sale of mortgage servicing rights $ (4,447)