Derivative And Hedging Activities (Details 3) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Interest rate lock commitments (mortgage) [Member]
Gain (loss) on derivative instruments not designated as hedging instruments
Gain / (Loss) Recognized in Income	$ 6,621	$ 1,386
Forward commitments (mortgage) [Member]
Gain (loss) on derivative instruments not designated as hedging instruments
Gain / (Loss) Recognized in Income	1,850	(5,783)
Covered call options [Member]
Gain (loss) on derivative instruments not designated as hedging instruments
Gain / (Loss) Recognized in Income	469
Capital market fees [Member] | Interest rate-related instruments - customer and mirror [Member]
Gain (loss) on derivative instruments not designated as hedging instruments
Gain / (Loss) Recognized in Income	174	(3,668)
Capital market fees [Member] | Foreign currency exchange forwards [Member]
Gain (loss) on derivative instruments not designated as hedging instruments
Gain / (Loss) Recognized in Income	$ (64)	$ (12)