Derivatives and Hedging Activities (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Summary of customer related derivative positions, not designated as hedging
Fair Value	$ (11,091)		$ (16,189)
Receive fixed, pay variable [Member] | Loan level swaps [Member] | Notional Amount Maturing [Member]
Summary of customer related derivative positions, not designated as hedging
Number of Positions	164	[1]	143	[1]
2013	4,003		16,766
2014	54,724		65,344
2015	99,271		105,939
2016	49,875		45,267
Thereafter	379,553		268,932
Total	587,426		502,248
Fair Value	15,053		28,678
Pay fixed, receive variable [Member] | Loan level swaps [Member] | Notional Amount Maturing [Member]
Summary of customer related derivative positions, not designated as hedging
Number of Positions	158	[1]	137	[1]
2013	4,003		16,766
2014	54,724		65,344
2015	99,271		105,939
2016	49,875		45,267
Thereafter	379,553		268,932
Total	587,426		502,248
Fair Value	(15,096)		(28,663)
Buys foreign exchange, sells US currency [Member] | Foreign exchange contracts [Member] | Notional Amount Maturing [Member]
Summary of customer related derivative positions, not designated as hedging
Number of Positions	7	[1]	16	[1]
2013	6,621		42,516
2014	7,221
2015
2016
Thereafter
Total	13,842		42,516
Fair Value	447		1,748
Buys US currency, sells foreign exchange [Member] | Foreign exchange contracts [Member] | Notional Amount Maturing [Member]
Summary of customer related derivative positions, not designated as hedging
Number of Positions	7	[1]	16	[1]
2013	6,621		42,516
2014	7,221
2015
2016
Thereafter
Total	13,842		42,516
Fair Value	$ (440)		$ (1,718)

[1] The Company may enter into one swap agreement which offsets multiple reverse swap agreements. The positions will offset and the terms will be identical.