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Loans and Allowance for Loan Losses - Summary of Loans Class Modified as TDRs (Details) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) Loan | Dec. 31, 2016 USD ($) Loan
Financing Receivable Recorded Investment [Line Items] |  |
Number of Loans | Loan | 5 | 6
Commercial |  |
Financing Receivable Recorded Investment [Line Items] |  |
Number of Loans | Loan | 1 |
Pre-Modification Recorded Investment | $ 1,293 |
Post-Modification Recorded Investment | $ 1,293 |
Commercial Real Estate |  |
Financing Receivable Recorded Investment [Line Items] |  |
Number of Loans | Loan |  | 1
Pre-Modification Recorded Investment |  | $ 1,047
Post-Modification Recorded Investment |  | $ 1,047

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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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