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Servicing Assets (Changes in serving rights at fair value) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Servicing Asset At Fair Value Amount [Roll Forward]      
Fair value $ 10,716 $ 9,821 $ 9,858
Servicing from mortgage securitizations or asset transfers 1,174 1,481 1,658
Servicing from portfolio acquired 40,463 0 0
Changes due to payments on loans (906) (814) (590)
Changes in fair value due to changes in valuation model inputs or assumptions (668) 228 (1,105)
Fair value $ 50,779 $ 10,716 $ 9,821