Loans and Allowance for Credit Losses (Troubled Debt Restructurings Modified by Portfolio Class) (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020 USD ($) contract	Jun. 30, 2019 USD ($) contract	Jun. 30, 2020 USD ($) contract	Jun. 30, 2019 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	13	3	18	18
Pre-Modification Outstanding Recorded Investment	$ 2,205	$ 972	$ 2,890	$ 16,252
Post-Modification Outstanding Recorded Investment	$ 2,205	$ 972	$ 2,890	$ 16,252
Total Commercial [Member] \| Construction and Land Development [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	1		1
Pre-Modification Outstanding Recorded Investment	$ 15		$ 15
Post-Modification Outstanding Recorded Investment	$ 15		$ 15
Residential Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	8	2	9	7
Pre-Modification Outstanding Recorded Investment	$ 1,810	$ 638	$ 2,066	$ 1,902
Post-Modification Outstanding Recorded Investment	$ 1,810	$ 638	$ 2,066	$ 1,902
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	2		5	2
Pre-Modification Outstanding Recorded Investment	$ 30		$ 64	$ 46
Post-Modification Outstanding Recorded Investment	$ 30		$ 64	$ 46
Total Commercial And Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	2	1	3	9
Pre-Modification Outstanding Recorded Investment	$ 350	$ 334	$ 745	$ 14,304
Post-Modification Outstanding Recorded Investment	$ 350	$ 334	$ 745	$ 14,304
Total Commercial And Industrial [Member] \| Total Commercial [Member] \| Commercial Non-Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract	2	1	3	8
Pre-Modification Outstanding Recorded Investment	$ 350	$ 334	$ 745	$ 14,137
Post-Modification Outstanding Recorded Investment	$ 350	$ 334	$ 745	$ 14,137
Total Commercial And Industrial [Member] \| Total Commercial [Member] \| Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts \| contract				1
Pre-Modification Outstanding Recorded Investment				$ 167
Post-Modification Outstanding Recorded Investment				$ 167

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

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