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Allowance for Loan Losses - Roll Forward Of the Allowance for Loan Losses (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2018 | Mar. 31, 2017
Rollforward of the allowance for loan losses |  |  |  |
Beginning balance | $ 46,211 | $ 42,737 |  |
Charge-offs | (2,065) | (1,598) |  |
Recoveries | 505 | 284 |  |
Net (charge-offs) recoveries | (1,560) | (1,314) |  |
Provision for loan losses | 1,750 | 1,500 |  |
Ending balance | 46,401 | 42,923 |  |
Period-End Amount Allocated to: |  |  |  |
Individually evaluated for impairment |  |  | $ 1,472 | $ 3,977
Collectively evaluated for impairment |  |  | 43,112 | 36,227
Purchased with deteriorated credit quality | 46,211 | 42,737 | 46,401 | 42,923
Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Ending balance | 1,817 | 2,719 |  |
Period-End Amount Allocated to: |  |  |  |
Purchased with deteriorated credit quality | 1,817 | 2,719 | 1,817 | 2,719
Commercial, financial, agricultural |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Beginning balance | 5,542 | 5,486 |  |
Charge-offs | (659) | (832) |  |
Recoveries | 235 | 57 |  |
Net (charge-offs) recoveries | (424) | (775) |  |
Provision for loan losses | 1,953 | 401 |  |
Ending balance | 7,071 | 5,112 |  |
Period-End Amount Allocated to: |  |  |  |
Individually evaluated for impairment |  |  | 272 | 165
Collectively evaluated for impairment |  |  | 6,494 | 4,569
Purchased with deteriorated credit quality | 5,542 | 5,486 | 7,071 | 5,112
Commercial, financial, agricultural | Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Ending balance | 305 | 378 |  |
Period-End Amount Allocated to: |  |  |  |
Purchased with deteriorated credit quality | 305 | 378 | 305 | 378
Real estate – construction |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Beginning balance | 3,428 | 2,380 |  |
Charge-offs | 0 | 0 |  |
Recoveries | 4 | 31 |  |
Net (charge-offs) recoveries | 4 | 31 |  |
Provision for loan losses | 766 | (292) |  |
Ending balance | 4,198 | 2,119 |  |
Period-End Amount Allocated to: |  |  |  |
Individually evaluated for impairment |  |  | 1 | 0
Collectively evaluated for impairment |  |  | 4,197 | 2,119
Purchased with deteriorated credit quality | 3,428 | 2,380 | 4,198 | 2,119
Real estate – construction | Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Ending balance | 0 | 0 |  |
Period-End Amount Allocated to: |  |  |  |
Purchased with deteriorated credit quality | 0 | 0 | 0 | 0
Real estate – 1-4 family mortgage |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Beginning balance | 12,009 | 14,294 |  |
Charge-offs | (671) | (275) |  |
Recoveries | 133 | 82 |  |
Net (charge-offs) recoveries | (538) | (193) |  |
Provision for loan losses | (67) | (1,939) |  |
Ending balance | 11,404 | 12,162 |  |
Period-End Amount Allocated to: |  |  |  |
Individually evaluated for impairment |  |  | 168 | 1,139
Collectively evaluated for impairment |  |  | 10,750 | 10,256
Purchased with deteriorated credit quality | 12,009 | 14,294 | 11,404 | 12,162
Real estate – 1-4 family mortgage | Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Ending balance | 486 | 767 |  |
Period-End Amount Allocated to: |  |  |  |
Purchased with deteriorated credit quality | 486 | 767 | 486 | 767
Real estate – commercial mortgage |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Beginning balance | 23,384 | 19,059 |  |
Charge-offs | (613) | (227) |  |
Recoveries | 108 | 95 |  |
Net (charge-offs) recoveries | (505) | (132) |  |
Provision for loan losses | (965) | 3,146 |  |
Ending balance | 21,914 | 22,073 |  |
Period-End Amount Allocated to: |  |  |  |
Individually evaluated for impairment |  |  | 1,026 | 2,670
Collectively evaluated for impairment |  |  | 19,865 | 17,830
Purchased with deteriorated credit quality | 23,384 | 19,059 | 21,914 | 22,073
Real estate – commercial mortgage | Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Ending balance | 1,023 | 1,573 |  |
Period-End Amount Allocated to: |  |  |  |
Purchased with deteriorated credit quality | 1,023 | 1,573 | 1,023 | 1,573
Installment loans to individuals |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Beginning balance | 1,848 | 1,518 |  |
Charge-offs | (122) | (264) |  |
Recoveries | 25 | 19 |  |
Net (charge-offs) recoveries | (97) | (245) |  |
Provision for loan losses | 63 | 184 |  |
Ending balance | 1,814 | 1,457 |  |
Period-End Amount Allocated to: |  |  |  |
Individually evaluated for impairment |  |  | 5 | 3
Collectively evaluated for impairment |  |  | 1,806 | 1,453
Purchased with deteriorated credit quality | 1,848 | 1,518 | 1,814 | 1,457
Installment loans to individuals | Receivables Acquired with Deteriorated Credit Quality |  |  |  |
Rollforward of the allowance for loan losses |  |  |  |
Ending balance | 3 | 1 |  |
Period-End Amount Allocated to: |  |  |  |
Purchased with deteriorated credit quality | $ 3 | $ 1 | $ 3 | $ 1

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- Definition Financing Receivable, Allowance for Credit Losses, Net Recoveries (Write-downs) + References No definition available. + Details
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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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