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Loans and Allowance for Loan Losses (Troubled Debt Restructurings Modified by Portfolio Class) (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 USD ($) contract | Mar. 31, 2018 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 15 | 17
Pre-Modification Outstanding Recorded Investment | $ 15,280 | $ 63,220
Post-Modification Outstanding Recorded Investment | $ 15,280 | $ 63,220
Total Commercial [Member] | Commercial Real Estate - Income Producing [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract |  | 1
Pre-Modification Outstanding Recorded Investment |  | $ 1,564
Post-Modification Outstanding Recorded Investment |  | $ 1,564
Total Commercial [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract |  | 1
Pre-Modification Outstanding Recorded Investment |  | $ 43
Post-Modification Outstanding Recorded Investment |  | $ 43
Residential Mortgages [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 5 |
Pre-Modification Outstanding Recorded Investment | $ 1,264 |
Post-Modification Outstanding Recorded Investment | $ 1,264 |
Consumer [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 2 | 1
Pre-Modification Outstanding Recorded Investment | $ 46 | $ 222
Post-Modification Outstanding Recorded Investment | $ 46 | $ 222
Total Commercial And Industrial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 8 | 14
Pre-Modification Outstanding Recorded Investment | $ 13,970 | $ 61,391
Post-Modification Outstanding Recorded Investment | $ 13,970 | $ 61,391
Total Commercial And Industrial [Member] | Total Commercial [Member] | Commercial Non-Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 7 | 13
Pre-Modification Outstanding Recorded Investment | $ 13,803 | $ 55,482
Post-Modification Outstanding Recorded Investment | $ 13,803 | $ 55,482
Total Commercial And Industrial [Member] | Total Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 1 | 1
Pre-Modification Outstanding Recorded Investment | $ 167 | $ 5,909
Post-Modification Outstanding Recorded Investment | $ 167 | $ 5,909

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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