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Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) $ in Thousands | Jun. 30, 2018 USD ($) position | Dec. 31, 2017 USD ($) position
--- | --- | ---
Summary of customer related derivative positions, not designated as hedging |  |  |
Fair Value |  | $ 1,878 | $ 1,616
Not Designated as Hedging Instrument | Receive fixed, pay variable | Loan level swaps |  |  |
Summary of customer related derivative positions, not designated as hedging |  |  |
Number of Positions | position | [1] | 244 | 246
Less than 1 year |  | $ 59,965 | $ 36,023
Less than 2 years |  | 61,506 | 61,500
Less than 3 years |  | 176,919 | 152,287
Less than 4 years |  | 57,508 | 111,147
Thereafter |  | 614,476 | 591,385
Total |  | 970,374 | 952,342
Fair Value |  | $ (17,467) | $ 3,875
Not Designated as Hedging Instrument | Pay fixed, receive variable | Loan level swaps |  |  |
Summary of customer related derivative positions, not designated as hedging |  |  |
Number of Positions | position | [1] | 229 | 231
Less than 1 year |  | $ 59,965 | $ 36,023
Less than 2 years |  | 61,506 | 61,500
Less than 3 years |  | 176,919 | 152,287
Less than 4 years |  | 57,508 | 111,147
Thereafter |  | 614,476 | 591,385
Total |  | 970,374 | 952,342
Fair Value |  | $ 17,456 | $ (3,880)
Not Designated as Hedging Instrument | Buys foreign currency, sells U.S. currency | Foreign exchange contracts |  |  |
Summary of customer related derivative positions, not designated as hedging |  |  |
Number of Positions | position | [1] | 28 | 15
Less than 1 year |  | $ 48,077 | $ 26,382
Less than 2 years |  |  | 3,780
Total |  | 48,077 | 30,162
Fair Value |  | $ (1,041) | $ 1,202
Not Designated as Hedging Instrument | Buys U.S. currency, sells foreign currency | Foreign exchange contracts |  |  |
Summary of customer related derivative positions, not designated as hedging |  |  |
Number of Positions | position | [1] | 28 | 15
Less than 1 year |  | $ 48,077 | $ 26,382
Less than 2 years |  |  | 3,780
Total |  | 48,077 | 30,162
Fair Value |  | $ 1,067 | $ (1,188)
[1] | The Company may enter into one dealer swap agreement which offsets multiple commercial borrower swap agreements.

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