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FAIR VALUE DISCLOSURES - Summary of Financial Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Detail) - Fair Value, Measurements, Nonrecurring - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Fair Value, Inputs, Level 1 [Member]    
Assets    
Impaired loans $ 0 $ 0
Other Real Estate Owned, Fair Value Disclosure 0 0
Fair Value, Inputs, Level 2 [Member]    
Assets    
Impaired loans 0 0
Other Real Estate Owned, Fair Value Disclosure 0 0
Fair Value, Inputs, Level 3 [Member]    
Assets    
Impaired loans 2,671 8,154
Other Real Estate Owned, Fair Value Disclosure $ 1,086 $ 3,921