Derivatives and Hedging Activities (Customer Related Derivative Positions - Not Designated as Hedges) (Details) $ in Thousands	Jun. 30, 2016 USD ($) position	Dec. 31, 2015 USD ($) position
Summary of customer related derivative positions, not designated as hedging
Total	$ 125,000	$ 75,000
Derivative Asset, Fair Value, Gross Asset	47,582	23,072
Fair Value	(3,188)	(3,273)
Loan level swaps
Summary of customer related derivative positions, not designated as hedging
Derivative Asset, Fair Value, Gross Asset	46,820	22,470
Foreign exchange contracts
Summary of customer related derivative positions, not designated as hedging
Derivative Asset, Fair Value, Gross Asset	$ 762	$ 602
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	194	171
Less than 1 year	$ 25,764	$ 37,732
Less than 2 years	36,089	34,424
Less than 3 years	61,431	29,629
Less than 4 years	77,242	77,041
Thereafter	555,329	488,110
Total	755,855	666,936
Fair Value	$ 46,820	$ 22,467
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	179	165
Less than 1 year	$ 25,764	$ 37,732
Less than 2 years	36,089	34,424
Less than 3 years	61,431	29,629
Less than 4 years	77,242	77,041
Thereafter	555,329	488,110
Total	755,855	666,936
Fair Value	$ (46,723)	$ (22,462)
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	32	21
Less than 1 year	$ 54,095	$ 38,416
Total	54,095	38,416
Fair Value	$ 87	$ (354)
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	32	21
Less than 1 year	$ 54,095	$ 38,416
Total	54,095	38,416
Fair Value	$ (72)	$ 382