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Fair Value (Reconciliation of assets and liabilities using significant unobservable inputs (Level 3)) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance $ 9,688 $ 7,845 $ 9,858 $ 7,531
Gains (losses) included in earnings   (28)   (98)
New instruments acquired 540 717 1,074 1,275
Change due to principal payments (164) (121) (326) (225)
Amortization   8   28
Changes in fair value of servicing assets (198) (483) (740) (573)
Balance 9,866 7,938 9,866 7,938
Derivative Financial Instruments, Assets [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance 0 772 0 1,171
Gains (losses) included in earnings   (585)   (984)
New instruments acquired 0 0 0 0
Change due to principal payments 0 0 0 0
Amortization   0   0
Changes in fair value of servicing assets 0 0 0 0
Balance 0 187 0 187
Servicing Assets [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance 9,688 7,819 9,858 7,455
Gains (losses) included in earnings   0   0
New instruments acquired 540 717 1,074 1,275
Change due to principal payments (164) (121) (326) (225)
Amortization   0   0
Changes in fair value of servicing assets (198) (483) (740) (573)
Balance 9,866 7,932 9,866 7,932
Derivative Financial Instruments, Liabilities [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance 0 (746) 0 (1,095)
Gains (losses) included in earnings   557   886
New instruments acquired 0 0 0 0
Change due to principal payments 0 0 0 0
Amortization   8   28
Changes in fair value of servicing assets 0 0 0 0
Balance $ 0 $ (181) $ 0 $ (181)