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Non Purchased Loans - Impaired Loans (Details) - Non purchased loans and leases - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Impaired loans |  |
Unpaid Contractual Principal Balance | $ 21,506 | $ 26,382
Recorded Investment With Allowance | 15,830 | 21,040
Recorded Investment With No Allowance | 1,356 | 703
Total Recorded Investment | 17,186 | 21,743
Related Allowance | 1,304 | 2,567
Commercial, financial, agricultural |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 2,612 | 3,043
Recorded Investment With Allowance | 2,491 | 2,365
Recorded Investment With No Allowance | 0 | 0
Total Recorded Investment | 2,491 | 2,365
Related Allowance | 223 | 138
Lease financing |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 159 | 159
Recorded Investment With Allowance | 159 | 159
Recorded Investment With No Allowance | 0 | 0
Total Recorded Investment | 159 | 159
Related Allowance | 2 | 2
Real estate – construction |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 150 | 578
Recorded Investment With Allowance | 150 | 578
Recorded Investment With No Allowance | 0 | 0
Total Recorded Investment | 150 | 578
Related Allowance | 1 | 4
Real estate – 1-4 family mortgage |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 9,106 | 10,018
Recorded Investment With Allowance | 8,111 | 8,169
Recorded Investment With No Allowance | 0 | 703
Total Recorded Investment | 8,111 | 8,872
Related Allowance | 121 | 561
Real estate – commercial mortgage |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 9,373 | 12,463
Recorded Investment With Allowance | 4,817 | 9,652
Recorded Investment With No Allowance | 1,356 | 0
Total Recorded Investment | 6,173 | 9,652
Related Allowance | 956 | 1,861
Installment loans to individuals |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 106 | 121
Recorded Investment With Allowance | 102 | 117
Recorded Investment With No Allowance | 0 | 0
Total Recorded Investment | 102 | 117
Related Allowance | $ 1 | $ 1

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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524 + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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