Quarterly report pursuant to Section 13 or 15(d)

VIEs - Low Income Housing Tax Credit Partnership (Details)

v3.7.0.1
VIEs - Low Income Housing Tax Credit Partnership (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Low Income Housing Tax Credit Partnerships          
Variable Interest Entity [Line Items]          
Affordable housing tax credit investments $ 942,769   $ 942,769   $ 877,237
Less: amortization (327,078)   (327,078)   (300,357)
Net affordable housing tax credit investments 615,691   615,691   576,880
Unfunded commitments 327,793   327,793   $ 292,721
Tax credits and other tax benefits recognized 22,671 $ 18,150 45,955 $ 36,434  
Proportional Amortization Method          
Variable Interest Entity [Line Items]          
Tax credit amortization expense included in provision for income taxes 17,220 12,499 34,182 24,905  
Equity Method          
Variable Interest Entity [Line Items]          
Tax credit investment (gains) losses included in non-interest income $ 0 $ 132 $ 109 $ 264