Derivatives (Summary Of Types Of Derivatives, Separately By Assets And Liabilities And Fair Value Of Derivatives) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Asset derivatives	$ 41,735	$ 47,501
Liability derivatives	5,811	37,063
Foreign Exchange Contract
Derivatives, Fair Value [Line Items]
Asset derivatives	670	670
Liability derivatives	610	874
Foreign Exchange Contract | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	670	670
Foreign Exchange Contract | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	610	874
Interest Rate Lock Commitments
Derivatives, Fair Value [Line Items]
Asset derivatives	4,781	4,076
Interest Rate Lock Commitments | Interest Rate Contracts | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	4,781	4,076
Interest Rate Lock Commitments | Interest Rate Contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	0	0
Interest Rate Forward Sales Commitments
Derivatives, Fair Value [Line Items]
Asset derivatives	964	8,054
Liability derivatives	807	1,318
Interest Rate Forward Sales Commitments | Interest Rate Contracts | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	964	8,054
Interest Rate Forward Sales Commitments | Interest Rate Contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	807	1,318
Interest Rate Swap
Derivatives, Fair Value [Line Items]
Asset derivatives	35,320	34,701
Liability derivatives	4,394	34,871
Interest Rate Swap | Interest Rate Contracts | Other Assets
Derivatives, Fair Value [Line Items]
Asset derivatives	35,320	34,701
Interest Rate Swap | Interest Rate Contracts | Other Liabilities
Derivatives, Fair Value [Line Items]
Liability derivatives	$ 4,394	$ 34,871