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Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) - Not Designated as Hedging Instrument [Member] $ in Thousands | Dec. 31, 2018 USD ($) position | Dec. 31, 2017 USD ($) position
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Receive fixed, pay variable | Loan level swaps |  |
Summary of customer related derivative positions, not designated as hedging |  |
Number of Positions (1) | position | 235 | 246
Less than 1 year | $ 50,702 | $ 36,023
Less than 2 years | 124,222 | 61,500
Less than 3 years | 97,904 | 152,287
Less than 4 years | 47,308 | 111,147
Thereafter | 631,471 | 591,385
Total | 951,607 | 952,342
Fair Value | $ (2,907) | $ 3,875
Pay fixed, receive variable | Loan level swaps |  |
Summary of customer related derivative positions, not designated as hedging |  |
Number of Positions (1) | position | 220 | 231
Less than 1 year | $ 50,702 | $ 36,023
Less than 2 years | 124,222 | 61,500
Less than 3 years | 97,904 | 152,287
Less than 4 years | 47,308 | 111,147
Thereafter | 631,471 | 591,385
Total | 951,607 | 952,342
Fair Value | $ 2,903 | $ (3,880)
Buys foreign currency, sells U.S. currency | Foreign exchange contracts |  |
Summary of customer related derivative positions, not designated as hedging |  |
Number of Positions (1) | position | 27 | 15
Less than 1 year | $ 60,297 | $ 26,382
Less than 2 years | 3,505 | 3,780
Total | 63,802 | 30,162
Fair Value | $ (1,404) | $ 1,202
Buys U.S. currency, sells foreign currency | Foreign exchange contracts |  |
Summary of customer related derivative positions, not designated as hedging |  |
Number of Positions (1) | position | 27 | 15
Less than 1 year | $ 60,297 | $ 26,382
Less than 2 years | 3,505 | 3,780
Total | 63,802 | 30,162
Fair Value | $ 1,434 | $ (1,188)

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