Estimated Fair Values (Assets And Liabilities Carried At Fair Value On A Nonrecurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate, Non Covered	$ 61,707		$ 70,454	$ 43,186		$ 36,898
Other Real Estate, Covered	8,152		22,982	29,272		47,081
Mortgage servicing rights	19,327	$ 18,162	16,688	$ 0	$ 0	$ 16
Fair Value, Measurements, Nonrecurring | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans not covered by loss share agreements	61,621		73,170
Other Real Estate, Non Covered	39,996		40,714
Other Real Estate, Covered	3,250		17,664
Mortgage servicing rights			13,562
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]
Impaired loans not covered by loss share agreements	0		0
Other Real Estate, Non Covered	0		0
Other Real Estate, Covered	0		0
Mortgage servicing rights			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]
Impaired loans not covered by loss share agreements	0		0
Other Real Estate, Non Covered	0		0
Other Real Estate, Covered	0		0
Mortgage servicing rights			0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3 Inputs)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans not covered by loss share agreements	61,621		73,170
Other Real Estate, Non Covered	39,996		40,714
Other Real Estate, Covered	$ 3,250		17,664
Mortgage servicing rights			$ 13,562