Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) $ in Thousands	Dec. 31, 2015 USD ($) position	Dec. 31, 2014 USD ($) position
Summary of customer related derivative positions, not designated as hedging
Total	$ 75,000	$ 75,000
Fair Value	$ (3,273)	$ (5,570)
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	171	174
Less than 1 year	$ 37,732	$ 88,147
Less than 2 years	34,424	46,854
Less than 3 years	29,629	40,958
Less than 4 years	77,041	38,108
Thereafter	488,110	403,208
Total	666,936	617,275
Fair Value	$ 22,467	$ 17,840
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	165	168
Less than 1 year	$ 37,732	$ 88,147
Less than 2 years	34,424	46,854
Less than 3 years	29,629	40,958
Less than 4 years	77,041	38,108
Thereafter	488,110	403,208
Total	666,936	617,275
Fair Value	$ (22,462)	$ (17,837)
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	21	23
Less than 1 year	$ 38,416	$ 57,112
Total	38,416	57,112
Fair Value	$ (354)	$ (3,984)
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	21	23
Less than 1 year	$ 38,416	$ 57,112
Total	38,416	57,112
Fair Value	$ 382	$ 4,007