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Derivatives (Notional and Fair Values) (Details) $ in Thousands | Dec. 31, 2017 USD ($) company | Dec. 31, 2016 USD ($)
--- | --- | ---
Fair Values of Derivative Instruments |  |
Derivative assets | $ 66,146 | $ 83,780
Derivative liabilities | 74,935 | 82,323
Derivative instruments designated as hedging instruments |  |
Fair Values of Derivative Instruments |  |
Notional Amount | 35,811 | 131,391
Derivative assets | 0 | 4,325
Derivative liabilities | 6,799 | 5,976
Derivative instruments designated as hedging instruments | Interest rate swaps on certificates of deposit |  |
Fair Values of Derivative Instruments |  |
Notional Amount | 35,811 | 48,365
Derivative assets | 0 | 0
Derivative liabilities | 6,799 | 5,976
Derivative instruments designated as hedging instruments | Foreign currency forward contracts |  |
Fair Values of Derivative Instruments |  |
Notional Amount | 0 | 83,026
Derivative assets | 0 | 4,325
Derivative liabilities | 0 | 0
Derivative instruments not designated as hedging instruments |  |
Fair Values of Derivative Instruments |  |
Notional Amount | 10,153,108 | 8,507,660
Derivative assets | 66,146 | 79,455
Derivative liabilities | 68,136 | 76,347
Derivative instruments not designated as hedging instruments | Interest rate swaps and options |  |
Fair Values of Derivative Instruments |  |
Notional Amount | 9,333,860 | 7,668,482
Derivative assets | 58,633 | 67,578
Derivative liabilities | 57,958 | 65,131
Derivative instruments not designated as hedging instruments | Foreign exchange contracts |  |
Fair Values of Derivative Instruments |  |
Notional Amount | 770,215 | 767,764
Derivative assets | 5,840 | 11,874
Derivative liabilities | 10,170 | 11,213
Derivative instruments not designated as hedging instruments | Credit risk participation agreements (“RPAs”) |  |
Fair Values of Derivative Instruments |  |
Notional Amount | 49,033 | 71,414
Derivative assets | 1 | 3
Derivative liabilities | 8 | 3
Derivative instruments not designated as hedging instruments | Warrants |  |
Fair Values of Derivative Instruments |  |
Notional Amount | 0 | 0
Derivative assets | 1,672 | 0
Derivative liabilities | 0 | $ 0
Derivative instruments not designated as hedging instruments | Public Companies |  |
Fair Values of Derivative Instruments |  |
Derivative assets | $ 993 |
Number of companies in which warrants are held | company | 4 |
Derivative instruments not designated as hedging instruments | Private Companies |  |
Fair Values of Derivative Instruments |  |
Derivative assets | $ 679 |
Number of companies in which warrants are held | company | 23 |

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