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Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) $ in Thousands | Dec. 31, 2016 USD ($) position | Dec. 31, 2015 USD ($) position
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Summary of customer related derivative positions, not designated as hedging |  |
Total | $ 75,000 | $ 75,000
Fair Value | $ 624 | $ (3,273)
Not Designated as Hedging Instrument [Member] | Receive fixed, pay variable | Loan level derivatives |  |
Summary of customer related derivative positions, not designated as hedging |  |
Number of Positions (1) | position | 222 | 171
Less than 1 year | $ 30,245 | $ 37,732
Less than 2 years | 21,708 | 34,424
Less than 3 years | 63,771 | 29,629
Less than 4 years | 165,783 | 77,041
Thereafter | 567,897 | 488,110
Total | 849,404 | 666,936
Fair Value | $ 12,005 | $ 22,467
Not Designated as Hedging Instrument [Member] | Pay fixed, receive variable | Loan level derivatives |  |
Summary of customer related derivative positions, not designated as hedging |  |
Number of Positions (1) | position | 207 | 165
Less than 1 year | $ 30,245 | $ 37,732
Less than 2 years | 21,708 | 34,424
Less than 3 years | 63,771 | 29,629
Less than 4 years | 165,783 | 77,041
Thereafter | 567,897 | 488,110
Total | 849,404 | 666,936
Fair Value | $ (12,008) | $ (22,462)
Not Designated as Hedging Instrument [Member] | 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 | 33 | 21
Less than 1 year | $ 45,711 | $ 38,416
Total | 45,711 | 38,416
Fair Value | $ (2,250) | $ (354)
Not Designated as Hedging Instrument [Member] | 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 | 33 | 21
Less than 1 year | $ 45,711 | $ 38,416
Total | 45,711 | 38,416
Fair Value | $ 2,277 | $ 382

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