Fair Value Measurement (Losses Resulting From Nonrecurring Fair Value Adjustments) (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loss from nonrecurring measurements	$ 49,594	$ 69,898	$ 125,669
Residential Mortgage-Backed Securities And Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loss from nonrecurring measurements	155	359	414
Non-Covered Loans And Leases [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loss from nonrecurring measurements	37,897	51,883	119,240
Non-Covered Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loss from nonrecurring measurements	6,896	8,947	4,074
Covered Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loss from nonrecurring measurements	$ 4,646	$ 8,709	$ 1,941