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Loans and Allowance for Loan Losses (Troubled Debt Restructurings Modified by Portfolio Class) (Details) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2017 USD ($) contract | Jun. 30, 2016 USD ($) contract
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 53 | 21
Pre-Modification Outstanding Recorded Investment | $ 104,334 | $ 58,347
Post-Modification Outstanding Recorded Investment | $ 104,336 | $ 58,347
Total Commercial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 41 | 17
Pre-Modification Outstanding Recorded Investment | $ 96,710 | $ 57,915
Post-Modification Outstanding Recorded Investment | $ 96,710 | $ 57,915
Total Commercial [Member] | Commercial Real Estate - Income Producing [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 5 |
Pre-Modification Outstanding Recorded Investment | $ 6,486 |
Post-Modification Outstanding Recorded Investment | $ 6,486 |
Total Commercial [Member] | Construction and Land Development [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract |  |
Pre-Modification Outstanding Recorded Investment |  |
Post-Modification Outstanding Recorded Investment |  |
Residential Mortgages [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 6 | 4
Pre-Modification Outstanding Recorded Investment | $ 1,098 | $ 432
Post-Modification Outstanding Recorded Investment | $ 1,098 | $ 432
Consumer [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 1 |
Pre-Modification Outstanding Recorded Investment | $ 40 |
Post-Modification Outstanding Recorded Investment | $ 42 |
Total Commercial & Industrial [Member] | Total Commercial [Member] | Commercial Non-Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 37 | 17
Pre-Modification Outstanding Recorded Investment | $ 92,976 | $ 57,915
Post-Modification Outstanding Recorded Investment | $ 92,976 | $ 57,915
Total Commercial & Industrial [Member] | Total Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 4 |
Pre-Modification Outstanding Recorded Investment | $ 3,734 |
Post-Modification Outstanding Recorded Investment | $ 3,734 |

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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=66008989&loc=SL6953676-111524 + Details
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