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Non Purchased Loans - Impact of Modifications Classified as Restructured Loans (Details) - Non purchased loans and leases $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2018 USD ($) loan | Jun. 30, 2017 USD ($) loan | Jun. 30, 2018 USD ($) loan | Jun. 30, 2017 USD ($) loan
Restructured loans |  |  |  |
Number of Loans | loan | 1 | 5 | 5 | 8
Pre- Modification Outstanding Recorded Investment | $ 49 | $ 497 | $ 708 | $ 761
Post- Modification Outstanding Recorded Investment | $ 49 | $ 192 | $ 703 | $ 448
Real estate – 1-4 family mortgage |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan | 1 | 3 | 4 | 5
Pre- Modification Outstanding Recorded Investment | $ 49 | $ 127 | $ 625 | $ 304
Post- Modification Outstanding Recorded Investment | $ 49 | $ 126 | $ 625 | $ 297
Real estate – commercial mortgage |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan |  | 1 | 1 | 2
Pre- Modification Outstanding Recorded Investment |  | $ 366 | $ 83 | $ 453
Post- Modification Outstanding Recorded Investment |  | $ 62 | $ 78 | $ 147
Installment loans to individuals |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan |  | 1 |  | 1
Pre- Modification Outstanding Recorded Investment |  | $ 4 |  | $ 4
Post- Modification Outstanding Recorded Investment |  | $ 4 |  | $ 4

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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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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