Derivative And Hedging Activities (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
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	1,160	(2,443)
Capital Market Fees [Member] | Foreign Exchange Forward [Member]
Gain (loss) on derivative instruments not designated as hedging instruments
Gain / (Loss) Recognized in Income	(59)	(53)
Mortgage Banking [Member] | Interest Rate Lock Commitments [Member]
Gain (loss) on derivative instruments not designated as hedging instruments
Gain / (Loss) Recognized in Income	3,223	4,649
Mortgage Banking [Member] | Forward Contracts [Member]
Gain (loss) on derivative instruments not designated as hedging instruments
Gain / (Loss) Recognized in Income	$ 4,624	$ (10,388)