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Assets & Liability Derivative Positions & the Potential Effect of Netting Arrangements - Current Quarter (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Offsetting Liabilities [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | $ 41,905 | $ 23,072
Derivative Asset, Collateral, Obligation to Return Cash, Offset | 0 | 0
Derivative Asset | 41,905 | 23,072
Derivative, Collateral, Obligation to Return Securities | 10 | 2
Derivative, Collateral, Obligation to Return Cash | 0 | 0
Derivative Asset, Fair Value, Amount Offset Against Collateral | 41,895 | 23,070
Derivative Liability, Fair Value, Gross Liability | 184,754 | 160,270
Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 0 | 0
Derivative Liability | 184,754 | 160,270
Derivative, Collateral, Right to Reclaim Securities | 10 | 2
Derivative, Collateral, Right to Reclaim Cash | 184,265 | 159,692
Derivative Liability, Fair Value, Amount Offset Against Collateral | 479 | 576
Interest rate swaps |  |
Offsetting Liabilities [Line Items] |  |
Derivative Liability, Fair Value, Gross Liability | 1,993 | 3,273
Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 0 | 0
Derivative Liability | 1,993 | 3,273
Derivative, Collateral, Right to Reclaim Securities | 0 | 0
Derivative, Collateral, Right to Reclaim Cash | 1,993 | 3,273
Derivative Liability, Fair Value, Amount Offset Against Collateral | 0 | 0
Loan level swaps |  |
Offsetting Liabilities [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 41,411 | 22,470
Derivative Asset, Collateral, Obligation to Return Cash, Offset | 0 | 0
Derivative Asset | 41,411 | 22,470
Derivative, Collateral, Obligation to Return Securities | 10 | 2
Derivative, Collateral, Obligation to Return Cash | 0 | 0
Derivative Asset, Fair Value, Amount Offset Against Collateral | 41,401 | 22,468
Derivative Liability, Fair Value, Gross Liability | 41,378 | 22,465
Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 0 | 0
Derivative Liability | 41,378 | 22,465
Derivative, Collateral, Right to Reclaim Securities | 10 | 2
Derivative, Collateral, Right to Reclaim Cash | 41,358 | 22,461
Derivative Liability, Fair Value, Amount Offset Against Collateral | 10 | 2
Customer foreign exchange contracts |  |
Offsetting Liabilities [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 494 | 602
Derivative Asset, Collateral, Obligation to Return Cash, Offset | 0 | 0
Derivative Asset | 494 | 602
Derivative, Collateral, Obligation to Return Securities | 0 | 0
Derivative, Collateral, Obligation to Return Cash | 0 | 0
Derivative Asset, Fair Value, Amount Offset Against Collateral | 494 | 602
Derivative Liability, Fair Value, Gross Liability | 469 | 574
Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 0 | 0
Derivative Liability | 469 | 574
Derivative, Collateral, Right to Reclaim Securities | 0 | 0
Derivative, Collateral, Right to Reclaim Cash | 0 | 0
Derivative Liability, Fair Value, Amount Offset Against Collateral | 469 | 574
Customer repurchase agreements and other short-term borrowings(c) |  |
Offsetting Liabilities [Line Items] |  |
Derivative Liability, Fair Value, Gross Liability | 140,914 | 133,958
Derivative Liability, Collateral, Right to Reclaim Cash, Offset | 0 | 0
Derivative Liability | 140,914 | 133,958
Derivative, Collateral, Right to Reclaim Securities | 0 | 0
Derivative, Collateral, Right to Reclaim Cash | 140,914 | 133,958
Derivative Liability, Fair Value, Amount Offset Against Collateral | 0 | 0
Other Liabilities [Member] |  |
Offsetting Liabilities [Line Items] |  |
Derivative Liability, Fair Value, Gross Liability | $ 43,840 | $ 26,313

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