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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, 2020 USD ($) loan | Jun. 30, 2019 USD ($) loan | Jun. 30, 2020 USD ($) loan | Jun. 30, 2019 USD ($) loan
Restructured loans |  |  |  |
Number of Loans | loan | 6 | 2 | 7 | 2
Pre- Modification Outstanding Recorded Investment | $ 1,890 | $ 2,600 | $ 2,114 | $ 2,600
Post- Modification Outstanding Recorded Investment | $ 1,893 | $ 2,596 | $ 2,008 | $ 2,596
Commercial |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 1 | 1 | 1 | 1
Pre- Modification Outstanding Recorded Investment | $ 1,029 | $ 2,520 | $ 1,029 | $ 2,520
Post- Modification Outstanding Recorded Investment | $ 1,031 | $ 2,520 | $ 1,031 | $ 2,520
Real estate – 1-4 family mortgage |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 2 |  | 3 |
Pre- Modification Outstanding Recorded Investment | $ 225 |  | $ 449 |
Post- Modification Outstanding Recorded Investment | $ 230 |  | $ 345 |
Real estate – 1-4 family mortgage | Primary |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 1 |  | 2 |
Pre- Modification Outstanding Recorded Investment | $ 66 |  | $ 290 |
Post- Modification Outstanding Recorded Investment | $ 68 |  | $ 183 |
Real estate – 1-4 family mortgage | Home equity |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 1 |  | 1 |
Pre- Modification Outstanding Recorded Investment | $ 159 |  | $ 159 |
Post- Modification Outstanding Recorded Investment | $ 162 |  | $ 162 |
Real estate – commercial mortgage: |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 2 | 1 | 2 | 1
Pre- Modification Outstanding Recorded Investment | $ 611 | $ 80 | $ 611 | $ 80
Post- Modification Outstanding Recorded Investment | $ 613 | $ 76 | $ 613 | $ 76
Real estate – commercial mortgage: | Owner-occupied |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 1 |  | 1 |
Pre- Modification Outstanding Recorded Investment | $ 69 |  | $ 69 |
Post- Modification Outstanding Recorded Investment | $ 69 |  | $ 69 |
Real estate – commercial mortgage: | Non-owner occupied |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 1 |  | 1 |
Pre- Modification Outstanding Recorded Investment | $ 542 |  | $ 542 |
Post- Modification Outstanding Recorded Investment | $ 544 |  | $ 544 |
Installment loans to individuals |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 1 |  | 1 |
Pre- Modification Outstanding Recorded Investment | $ 25 |  | $ 25 |
Post- Modification Outstanding Recorded Investment | $ 19 |  | $ 19 |

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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=121611835&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=121611835&loc=SL6953676-111524 + Details
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