Derivatives (Summary Of Types Of Derivatives, Separately By Assets And Liabilities And Fair Value Of Derivatives) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Asset Derivatives	$ 200,412	$ 49,484
Derivative Liability	6,285	15,982
Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Asset Derivatives	9,070	6,757
Interest rate forward sales commitments
Derivatives, Fair Value [Line Items]
Asset Derivatives	801	1
Derivative Liability	1,260	2,963
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives	189,366	42,276
Derivative Liability	4,010	12,746
Interest rate contracts | Interest rate lock commitments | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	9,070	6,757
Interest rate contracts | Interest rate lock commitments | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	0	0
Interest rate contracts | Interest rate forward sales commitments | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	801	1
Interest rate contracts | Interest rate forward sales commitments | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	1,260	2,963
Interest rate contracts | Interest Rate Swap [Member] | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	189,366	42,276
Interest rate contracts | Interest Rate Swap [Member] | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	4,010	12,746
Foreign currency derivatives
Derivatives, Fair Value [Line Items]
Asset Derivatives	1,175	450
Derivative Liability	1,015	273
Foreign currency derivatives | Other Assets
Derivatives, Fair Value [Line Items]
Asset Derivatives	1,175	450
Foreign currency derivatives | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liability	$ 1,015	$ 273