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Fair Value of Financial Instruments (Reconciliation of assets and liabilities using significant unobservable inputs (Level 3)) (Details) - Fair Value, Measurements, Recurring [Member] - Servicing Assets [Member] - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance $ 10,623 $ 10,533 $ 10,716 $ 9,821
New instruments acquired 206 389 508 741
Change due to principal payments (250) (210) (451) (409)
Changes in fair value of servicing assets (445) 117 (639) 676
Balance $ 10,134 $ 10,829 $ 10,134 $ 10,829