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FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK - Schedule of Commitments and Conditional Obligations (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Home equity – lines of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	$ 126,811	$ 110,473
1-4 family residential construction loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	7,820	6,153
Commercial real estate, construction and land development loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	43,830	14,174
Commercial, industrial and other loans
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	111,884	84,480
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	$ 7,097	$ 6,510

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