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Purchased Loans - Impact of Modifications Classified as Restructured Loans (Details) - Purchased loans $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 USD ($) loan | Jun. 30, 2018 USD ($) loan | Jun. 30, 2019 USD ($) loan | Jun. 30, 2018 USD ($) loan
Restructured loans |  |  |  |
Number of Loans | loan | 2 | 1 | 2 | 3
Pre- Modification Outstanding Recorded Investment | $ 2,600 | $ 18 | $ 2,600 | $ 74
Post- Modification Outstanding Recorded Investment | $ 2,596 | $ 17 | $ 2,596 | $ 68
Commercial, financial, agricultural |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 1 |  | 1 | 1
Pre- Modification Outstanding Recorded Investment | $ 2,520 |  | $ 2,520 | $ 48
Post- Modification Outstanding Recorded Investment | $ 2,520 |  | $ 2,520 | $ 44
Real estate – 1-4 family mortgage |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan |  | 1 |  | 1
Pre- Modification Outstanding Recorded Investment |  | $ 18 |  | $ 18
Post- Modification Outstanding Recorded Investment |  | $ 17 |  | $ 17
Real estate – commercial mortgage |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 1 |  | 1 | 1
Pre- Modification Outstanding Recorded Investment | $ 80 |  | $ 80 | $ 8
Post- Modification Outstanding Recorded Investment | $ 76 |  | $ 76 | $ 7

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- Definition Troubled Debt Restructuring Financing Receivable Modifications [Abstract] + References No definition available. + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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