Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.7-03.(a),19)
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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Name:	us-gaap_CommitmentsAndContingencies
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Commitments and Contingencies (Schedule Of Commitments And Contingencies) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Commitments and contingent liabilities
Commitments to extend credit
Loss Contingencies [Line Items]
Commitments and contingent liabilities	5,661,080
Forward sales commitments
Loss Contingencies [Line Items]
Commitments and contingent liabilities	637,954
Commitments to originate residential mortgage loans held for sale
Loss Contingencies [Line Items]
Commitments and contingent liabilities	421,515
Standby letters of credit
Loss Contingencies [Line Items]
Commitments and contingent liabilities	$ 83,227