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LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Impaired Loans That Are TDRs (Detail) $ in Thousands | Dec. 31, 2017 USD ($) contract | Dec. 31, 2016 USD ($) contract
--- | --- | ---
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 23 | 22
Recorded Investment | $ | $ 1,958 | $ 1,971
Accruing |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 13 | 9
Recorded Investment | $ | $ 1,183 | $ 930
Accruing | Commercial real estate | Owner-occupied |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 1 | 0
Recorded Investment | $ | $ 52 | $ 0
Accruing | Residential mortgage | First lien |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 11 | 8
Recorded Investment | $ | $ 1,102 | $ 896
Accruing | Residential mortgage | Home equity - lines of credit |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 1 | 1
Recorded Investment | $ | $ 29 | $ 34
Nonaccruing |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 10 | 13
Recorded Investment | $ | $ 775 | $ 1,041
Nonaccruing | Commercial real estate | Owner-occupied |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 1 | 0
Recorded Investment | $ | $ 57 | $ 0
Nonaccruing | Residential mortgage | First lien |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 8 | 12
Recorded Investment | $ | $ 715 | $ 1,035
Nonaccruing | Installment and other loans |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Contracts | contract | 1 | 1
Recorded Investment | $ | $ 3 | $ 6

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- Definition The amount of the outstanding recorded investment related to 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 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554 + Details
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