Estimated Fair Values (Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012		Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Not covered under loss share agreements in other real estate owned	$ 40,338	[1]	$ 43,513	[2]	$ 45,063	[1]	$ 50,399
Fair Value, Measurements, Nonrecurring | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	23,728		65,244
Impaired loans not covered by loss share agreements	90,211		51,644
Not covered under loss share agreements in other real estate owned	4,596		21,113
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0		0
Impaired loans not covered by loss share agreements	0		0
Not covered under loss share agreements in other real estate owned	0		0
Fair Value, Measurements, Nonrecurring | Quoted Prices for Similar Assets and Liabilities (Level 2 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	23,728		65,244
Impaired loans not covered by loss share agreements	0		0
Not covered under loss share agreements in other real estate owned	0		0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0		0
Impaired loans not covered by loss share agreements	90,211		51,644
Not covered under loss share agreements in other real estate owned	$ 4,596		$ 21,113

[1] Unaudited

[2] Derived from 2012 Annual Report on Form 10-K.