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Allowance For Loan Losses (Activity In The Allowance For Loan Losses) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Allowance for Loan and Lease Losses, Reserve Estimate Methodology, Historical Loss Period Factor |  |  |  |  | 96 months | 84 months
Financing Receivable, Allowance for Credit Losses, Write-downs | $ 2,716 | $ 3,046 | $ 6,166 | $ 6,754 |  |
Financing Receivable, Allowance for Credit Losses, Recovery | 1,813 | 2,365 | 3,984 | 4,495 |  |
Financing Receivables Allowance For Credit Losses Net Charge Offs | 903 | 681 | 2,182 | 2,259 |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 48,969 | 49,922 | 49,988 | 50,624 | $ 50,624 |
Ending balance | 49,452 | 53,822 | 49,452 | 53,822 | 49,988 | $ 50,624
Provision for Loan, Lease, and Other Losses | 1,386 | 4,581 | 1,646 | 5,457 |  |
Commercial Financial And Agricultural [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses, Write-downs | 287 | 318 | 936 | 657 |  |
Financing Receivable, Allowance for Credit Losses, Recovery | 206 | 163 | 858 | 532 |  |
Financing Receivables Allowance For Credit Losses Net Charge Offs | 81 | 155 | 78 | 125 |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 14,077 | 13,437 | 15,022 | 13,434 | 13,434 |
Ending balance | 14,478 | 16,746 | 14,478 | 16,746 | 15,022 | 13,434
Provision for Loan, Lease, and Other Losses | 482 | 3,464 | (466) | 3,437 |  |
Commercial Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses, Write-downs | 182 | 310 | 229 | 422 |  |
Financing Receivable, Allowance for Credit Losses, Recovery | 89 | 241 | 176 | 355 |  |
Financing Receivables Allowance For Credit Losses Net Charge Offs | 93 | 69 | 53 | 67 |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 9,488 | 10,281 | 9,601 | 10,432 | 10,432 |
Ending balance | 9,406 | 10,451 | 9,406 | 10,451 | 9,601 | 10,432
Provision for Loan, Lease, and Other Losses | 11 | 239 | (142) | 86 |  |
Construction Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses, Write-downs | 31 | 0 | 31 | 27 |  |
Financing Receivable, Allowance for Credit Losses, Recovery | 220 | 325 | 279 | 383 |  |
Financing Receivables Allowance For Credit Losses Net Charge Offs | (189) | (325) | (248) | (356) |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 4,463 | 4,368 | 4,430 | 5,247 | 5,247 |
Ending balance | 4,652 | 4,677 | 4,652 | 4,677 | 4,430 | 5,247
Provision for Loan, Lease, and Other Losses | 0 | (16) | (26) | (926) |  |
Residential Real Estate [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses, Write-downs | 102 | 290 | 218 | 770 |  |
Financing Receivable, Allowance for Credit Losses, Recovery | 244 | 336 | 604 | 627 |  |
Financing Receivables Allowance For Credit Losses Net Charge Offs | (142) | (46) | (386) | 143 |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 9,415 | 10,745 | 9,321 | 10,958 | 10,958 |
Ending balance | 9,245 | 10,319 | 9,245 | 10,319 | 9,321 | 10,958
Provision for Loan, Lease, and Other Losses | (312) | (472) | (462) | (496) |  |
Consumer [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses, Write-downs | 2,114 | 2,128 | 4,752 | 4,878 |  |
Financing Receivable, Allowance for Credit Losses, Recovery | 1,054 | 1,300 | 2,067 | 2,598 |  |
Financing Receivables Allowance For Credit Losses Net Charge Offs | 1,060 | 828 | 2,685 | 2,280 |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 11,526 | 11,091 | 11,614 | 10,553 | 10,553 |
Ending balance | 11,671 | 11,629 | 11,671 | 11,629 | 11,614 | 10,553
Provision for Loan, Lease, and Other Losses | 1,205 | 1,366 | 2,742 | 3,356 |  |
Leases [Member] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses, Write-downs | 0 | 0 | 0 | 0 |  |
Financing Receivable, Allowance for Credit Losses, Recovery | 0 | 0 | 0 | 0 |  |
Financing Receivables Allowance For Credit Losses Net Charge Offs | 0 | 0 | 0 | 0 |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |
Beginning balance | 0 | 0 | 0 | 0 | 0 |
Ending balance | 0 | 0 | 0 | 0 | $ 0 | $ 0
Provision for Loan, Lease, and Other Losses | $ 0 | $ 0 | $ 0 | $ 0 |  |

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- Definition Allowance for Loan and Lease Losses, Reserve Estimate Methodology, Historical Loss Period Factor + References No definition available. + Details
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- Definition Financing Receivables Allowance For Credit Losses Net Charge Offs + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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