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Fair Value (Reconciliation of assets and liabilities using significant unobservable inputs (Level 3)) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Changes in fair value of servicing assets   $ (59)
Servicing Assets [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Changes in fair value of servicing assets   (59)
Fair Value, Measurements, Recurring [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance $ 7,531 14,070
Gains (losses) included in earnings (69) (39)
New instruments acquired 557 531
Principal repayments (104) (418)
Amortization 19 78
Changes in fair value of servicing assets (89) (1,882)
Balance 7,845 12,281
Fair Value, Measurements, Recurring [Member] | Derivative Financial Instruments, Assets [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance 1,171 5,555
Gains (losses) included in earnings (399) (1,821)
New instruments acquired 0 0
Principal repayments 0 0
Amortization 0 0
Changes in fair value of servicing assets 0 0
Balance 772 3,734
Fair Value, Measurements, Recurring [Member] | Servicing Assets [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance 7,455 13,992
Gains (losses) included in earnings 0 0
New instruments acquired 557 531
Principal repayments (104) (418)
Amortization 0 0
Changes in fair value of servicing assets (89) (1,882)
Balance 7,819 12,164
Fair Value, Measurements, Recurring [Member] | Derivative Financial Instruments, Liabilities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance (1,095) (5,477)
Gains (losses) included in earnings 330 1,782
New instruments acquired 0 0
Principal repayments 0 0
Amortization 19 78
Changes in fair value of servicing assets 0 0
Balance $ (746) $ (3,617)