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Servicing Assets (Changes in serving rights at fair value) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Servicing Asset At Fair Value Amount Roll Forward      
Fair value $ 7,455 $ 13,992 $ 13,801
Sale of Mortgage Servicing Rights 0 (5,927) 0
Servicing from mortgage securitizations or asset transfers 2,616 2,620 2,149
Changes due to payments on loans (489) (1,017) (1,072)
Changes in fair value due to sales price of mortgage servicing rights held-for-sale 0 (2,939) 0
Changes in fair value due to changes in valuation model inputs or assumptions 276 726 (886)
Fair value $ 9,858 $ 7,455 $ 13,992