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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
Mar. 31, 2017
Mar. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance $ 9,858 $ 7,531
Gains (losses) included in earnings   (69)
New instruments acquired 534 557
Change due to principal payments (162) (104)
Amortization   19
Changes in fair value of servicing assets (542) (89)
Balance 9,688 7,845
Derivative Financial Instruments, Assets [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance 0 1,171
Gains (losses) included in earnings   (399)
New instruments acquired 0 0
Change due to principal payments 0 0
Amortization   0
Changes in fair value of servicing assets 0 0
Balance 0 772
Servicing Assets [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance 9,858 7,455
Gains (losses) included in earnings   0
New instruments acquired 534 557
Change due to principal payments (162) (104)
Amortization   0
Changes in fair value of servicing assets (542) (89)
Balance 9,688 7,819
Derivative Financial Instruments, Liabilities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance 0 (1,095)
Gains (losses) included in earnings   330
New instruments acquired 0 0
Change due to principal payments 0 0
Amortization   19
Changes in fair value of servicing assets 0 0
Balance $ 0 $ (746)