Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Level 3 Classification of Gains/Losses (Details)

v3.7.0.1
FAIR VALUES OF ASSETS AND LIABILITIES - Level 3 Classification of Gains/Losses (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net derivative asset (liability), gain (loss) included in earnings $ 5,150 $ 5,206
Mortgage banking income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net derivative asset (liability), gain (loss) included in earnings 5,150 5,206
Securities gains (losses)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net derivative asset (liability), gain (loss) included in earnings 0 0
Interest and fee income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net derivative asset (liability), gain (loss) included in earnings 0 0
Noninterest income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net derivative asset (liability), gain (loss) included in earnings 0 0
MSRs    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings (440) (2,766)
MSRs | Mortgage banking income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings (440) (2,766)
MSRs | Securities gains (losses)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
MSRs | Interest and fee income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
MSRs | Noninterest income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
Municipal securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings (1,386) 0
Municipal securities | Mortgage banking income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
Municipal securities | Securities gains (losses)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings (1,386) 0
Municipal securities | Interest and fee income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
Municipal securities | Noninterest income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
Asset-backed Securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 28 0
Asset-backed Securities | Mortgage banking income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
Asset-backed Securities | Securities gains (losses)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 28 0
Asset-backed Securities | Interest and fee income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
Asset-backed Securities | Noninterest income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
Automobile    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings (63) 0
Automobile | Mortgage banking income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
Automobile | Securities gains (losses)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
Automobile | Interest and fee income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings 0 0
Automobile | Noninterest income    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset, gain (loss) included in earnings $ (63) $ 0