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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK - Commitments and Conditional Obligations, Contract or Notional Amount (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Home equity lines of credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to fund | $ 155,916 | $ 139,281
1-4 family residential construction loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to fund | 12,876 | 11,420
Commercial real estate, construction and land development loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to fund | 27,419 | 44,592
Commercial, industrial and other loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to fund | 149,420 | 145,394
Standby letters of credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to fund | $ 17,061 | $ 12,273

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