Derivatives and Hedging Activities (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Summary of customer related derivative positions, not designated as hedging
Fair Value	$ (11,921)		$ (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	158	[1]	143	[1]
2013	4,058		16,766
2014	55,271		65,344
2015	100,565		105,939
2016	43,966		45,267
Thereafter	327,855		268,932
Total	531,715		502,248
Fair Value	13,519		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	152	[1]	137	[1]
2013	4,058		16,766
2014	55,271		65,344
2015	100,565		105,939
2016	43,966		45,267
Thereafter	327,855		268,932
Total	531,715		502,248
Fair Value	(13,543)		(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	13	[1]	16	[1]
2013	25,073		42,516
2014	7,221
2015
2016
Thereafter
Total	32,294		42,516
Fair Value	(64)		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	13	[1]	16	[1]
2013	25,073		42,516
2014	7,221
2015
2016
Thereafter
Total	32,294		42,516
Fair Value	$ 78		$ (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.