Derivatives (Summary Of Types Of Derivatives, Separately By Assets And Liabilities And Fair Value Of Derivatives) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative assets	$ 150,574	$ 49,484
Total liability derivatives	8,808	15,982
Interest rate lock commitments
Derivatives, Fair Value [Line Items]
Derivative assets	7,056	6,757
Interest rate forward sales commitments
Derivatives, Fair Value [Line Items]
Derivative assets	105	1
Total liability derivatives	1,351	2,963
Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative assets	142,787	42,276
Total liability derivatives	7,001	12,746
Interest Rate Contracts | Interest rate lock commitments | Asset Derivatives
Derivatives, Fair Value [Line Items]
Derivative assets	7,056	6,757
Interest Rate Contracts | Interest rate lock commitments | Liability Derivatives
Derivatives, Fair Value [Line Items]
Total liability derivatives	0	0
Interest Rate Contracts | Interest rate forward sales commitments | Asset Derivatives
Derivatives, Fair Value [Line Items]
Derivative assets	105	1
Interest Rate Contracts | Interest rate forward sales commitments | Liability Derivatives
Derivatives, Fair Value [Line Items]
Total liability derivatives	1,351	2,963
Interest Rate Contracts | Interest rate swaps | Asset Derivatives
Derivatives, Fair Value [Line Items]
Derivative assets	142,787	42,276
Interest Rate Contracts | Interest rate swaps | Liability Derivatives
Derivatives, Fair Value [Line Items]
Total liability derivatives	7,001	12,746
Foreign currency derivatives
Derivatives, Fair Value [Line Items]
Derivative assets	626	450
Total liability derivatives	456	273
Foreign currency derivatives | Asset Derivatives
Derivatives, Fair Value [Line Items]
Derivative assets	626	450
Foreign currency derivatives | Liability Derivatives
Derivatives, Fair Value [Line Items]
Total liability derivatives	$ 456	$ 273