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Derivatives (Summary of Types Of Derivatives And Gains (Losses) Recorded) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Derivative gains (losses)	$ (9,153)	$ (2,888)	$ (1,431)
Interest Rate Swap [Member] \| Other Income [Member]
Derivative gains (losses)	(187)
Interest Rate Contracts [Member] \| Rate Lock Commitments [Member] \| Mortgage Banking Revenue [Member]
Derivative gains (losses)	1,613	146	(1,176)
Interest Rate Contracts [Member] \| Forward Sales Commitments [Member] \| Mortgage Banking Revenue [Member]
Derivative gains (losses)	$ (10,579)	$ (3,034)	$ (255)

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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