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Non Purchased Loans - Impaired Loans (Details) - Non purchased loans and leases - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Impaired loans |  |
Unpaid Contractual Principal Balance | $ 23,440 | $ 28,011
Recorded Investment With Allowance | 18,069 | 21,039
Recorded Investment With No Allowance | 704 | 568
Total Recorded Investment | 18,773 | 21,607
Related Allowance | 2,802 | 3,626
Commercial, financial, agricultural |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 2,118 | 1,577
Recorded Investment With Allowance | 1,843 | 1,175
Recorded Investment With No Allowance | 0 | 0
Total Recorded Investment | 1,843 | 1,175
Related Allowance | 30 | 136
Real estate – construction |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 897 | 517
Recorded Investment With Allowance | 897 | 517
Recorded Investment With No Allowance | 0 | 0
Total Recorded Investment | 897 | 517
Related Allowance | 4 | 1
Real estate – 1-4 family mortgage |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 10,508 | 10,823
Recorded Investment With Allowance | 8,004 | 9,207
Recorded Investment With No Allowance | 704 | 0
Total Recorded Investment | 8,708 | 9,207
Related Allowance | 809 | 1,091
Real estate – commercial mortgage |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 9,777 | 15,007
Recorded Investment With Allowance | 7,189 | 10,053
Recorded Investment With No Allowance | 0 | 568
Total Recorded Investment | 7,189 | 10,621
Related Allowance | 1,958 | 2,397
Installment loans to individuals |  |
Impaired loans |  |
Unpaid Contractual Principal Balance | 140 | 87
Recorded Investment With Allowance | 136 | 87
Recorded Investment With No Allowance | 0 | 0
Total Recorded Investment | 136 | 87
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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