Fair Values Of Assets And Liabilities (Summary Of Assets Measured At Fair Value On A Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale, at lower of cost or market	$ 350,300
Impaired loans, Fair Value Losses (Gains) Recognized	5,965
Other real estate owned, Fair Value Losses Recognized	7,328
Fair Value Losses Recognized	13,293
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans - collateral based	165,604
Other real estate owned	76,236
Mortgage loans held-for-sale, at lower of cost or market	10,728
Fair value of assets measured on nonrecurring basis	252,568
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans - collateral based
Other real estate owned
Mortgage loans held-for-sale, at lower of cost or market
Fair value of assets measured on nonrecurring basis
Fair Value, Measurements, Nonrecurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held-for-sale, at lower of cost or market	10,728
Fair value of assets measured on nonrecurring basis	10,728
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans - collateral based	165,604
Other real estate owned	76,236
Fair value of assets measured on nonrecurring basis	$ 241,840