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Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) - Not Designated as Hedging Instrument $ in Thousands | Mar. 31, 2020 USD ($) position | Dec. 31, 2019 USD ($) 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 | position | [1] | 313 | 299
Less than 1 year |  | $ 155,318 | $ 156,690
Less than 2 years |  | 76,735 | 125,203
Less than 3 years |  | 126,910 | 85,603
Less than 4 years |  | 139,600 | 165,599
Thereafter |  | 1,178,142 | 1,044,315
Derivative, Notional Amount |  | 1,676,705 | 1,577,410
Fair Value | [2] | $ 143,707 | $ 48,596
Pay fixed, receive variable | Loan level swaps |  |  |
Summary of customer related derivative positions, not designated as hedging |  |  |
Number of Positions | position | [1] | 305 | 290
Less than 1 year |  | $ 158,692 | $ 156,690
Less than 2 years |  | 76,735 | 125,203
Less than 3 years |  | 126,910 | 85,603
Less than 4 years |  | 139,600 | 165,599
Thereafter |  | 1,178,142 | 1,044,315
Derivative, Notional Amount |  | 1,680,079 | 1,577,410
Fair Value | [2] | $ (143,726) | $ (48,591)
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] | 47 | 40
Less than 1 year |  | $ 118,711 | $ 91,434
Derivative, Notional Amount |  | 118,711 | 91,434
Fair Value | [2] | $ (1,439) | $ (81)
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] | 47 | 40
Less than 1 year |  | $ 118,711 | $ 91,434
Derivative, Notional Amount |  | 118,711 | 91,434
Fair Value | [2] | $ 1,499 | $ 123
[1] | The Company may enter into one dealer swap agreement which offsets multiple commercial borrower swap agreements.
[2] | Beginning in 2020, the Company made an election to include accrued interest within fair value balances.

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