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Non Purchased Loans - Impaired Loans (Details) - Non purchased loans and leases - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Impaired loans |  |
Unpaid Contractual Principal Balance | $ 29,892 | $ 26,382
Recorded Investment With Allowance | 22,693 | 21,040
Recorded Investment With No Allowance | 3,442 | 703
Total Recorded Investment | 26,135 | 21,743
Related Allowance | 1,112 | 2,567
Commercial, financial, agricultural |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 2,426 | 3,043
Recorded Investment With Allowance | 1,952 | 2,365
Recorded Investment With No Allowance | 0 | 0
Total Recorded Investment | 1,952 | 2,365
Related Allowance | 377 | 138
Lease financing |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 0 | 159
Recorded Investment With Allowance | 0 | 159
Recorded Investment With No Allowance | 0 | 0
Total Recorded Investment | 0 | 159
Related Allowance | 0 | 2
Real estate – construction |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 9,725 | 578
Recorded Investment With Allowance | 7,560 | 578
Recorded Investment With No Allowance | 2,165 | 0
Total Recorded Investment | 9,725 | 578
Related Allowance | 65 | 4
Real estate – 1-4 family mortgage |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 8,841 | 10,018
Recorded Investment With Allowance | 8,115 | 8,169
Recorded Investment With No Allowance | 0 | 703
Total Recorded Investment | 8,115 | 8,872
Related Allowance | 58 | 561
Real estate – commercial mortgage |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 8,781 | 12,463
Recorded Investment With Allowance | 4,954 | 9,652
Recorded Investment With No Allowance | 1,277 | 0
Total Recorded Investment | 6,231 | 9,652
Related Allowance | 611 | 1,861
Installment loans to individuals |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 119 | 121
Recorded Investment With Allowance | 112 | 117
Recorded Investment With No Allowance | 0 | 0
Total Recorded Investment | 112 | 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://fasb.org/us-gaap/role/ref/legacyRef -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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