Fair Values (Fair Value Assets And Liabilities Measured On Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Total investment securities, held to maturity	$ 4,759	$ 4,774
Fair Value, Measurements, Nonrecurring [Member]
Total	78,216	92,531
Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Total	78,216	92,531
Residential Mortgage-Backed Securities And Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Nonrecurring [Member]
Total investment securities, held to maturity	487	1,226
Residential Mortgage-Backed Securities And Collateralized Mortgage Obligations [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Total investment securities, held to maturity	487	1,226
Non-Covered Loans [Member] | Fair Value, Measurements, Nonrecurring [Member]
Total investment securities, held to maturity	53,847	74,639
Non-Covered Loans [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Total investment securities, held to maturity	53,847	74,639
Non-Covered Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Total investment securities, held to maturity	11,321	7,958
Non-Covered Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Total investment securities, held to maturity	11,321	7,958
Covered Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member]
Total investment securities, held to maturity	12,561	8,708
Covered Other Real Estate Owned [Member] | Fair Value, Measurements, Nonrecurring [Member] | Level 3 [Member]
Total investment securities, held to maturity	$ 12,561	$ 8,708