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Derivative Financial Instruments (Summary Amounts Included In Consolidated Statement Of Income Related To Derivatives) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Interest Rate Swaps And Floors [Member] \| Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Income related to derivative instruments not designated in hedge relationships	$ 151	$ (534)
Mortgage Banking Derivatives [Member] \| Mortgage Banking Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Income related to derivative instruments not designated in hedge relationships	1,347	(1,343)
Covered Call Options [Member] \| Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Income related to derivative instruments not designated in hedge relationships	$ 3,123	$ 2,470

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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