Quarterly report pursuant to Section 13 or 15(d)

VIEs - Unconsolidated VIEs (Details)

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VIEs - Unconsolidated VIEs (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Trust 2016 Unconsolidated [Member]    
Variable Interest Entity [Line Items]    
Total Assets $ 10,464 $ 14,770
Total Liabilities 0 0
Maximum Exposure to Loss 10,464 14,770
2015-1 Automobile Trust    
Variable Interest Entity [Line Items]    
Total Assets 2,046 2,227
Total Liabilities 0 0
Maximum Exposure to Loss 2,046 2,227
Trust Preferred Securities    
Variable Interest Entity [Line Items]    
Total Assets 13,919 13,919
Total Liabilities 252,568 252,552
Maximum Exposure to Loss 0 0
Low Income Housing Tax Credit Partnerships    
Variable Interest Entity [Line Items]    
Total Assets 615,691 576,880
Total Liabilities 327,793 292,721
Maximum Exposure to Loss 615,691 576,880
Other Investments    
Variable Interest Entity [Line Items]    
Total Assets 110,318 79,195
Total Liabilities 55,026 42,316
Maximum Exposure to Loss 110,318 79,195
Total    
Variable Interest Entity [Line Items]    
Total Assets 752,438 686,991
Total Liabilities 635,387 587,589
Maximum Exposure to Loss $ 738,519 $ 673,072