LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Impaired Loans That Are TDRs (Detail) $ in Thousands	Dec. 31, 2019 USD ($) contract	Dec. 31, 2018 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	20	22
Recorded Investment | $	$ 3,247	$ 1,827
Accruing
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	11	13
Recorded Investment | $	$ 979	$ 1,132
Accruing | Commercial Real Estate | Owner-occupied
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	1
Recorded Investment | $	$ 30	$ 39
Accruing | Residential mortgage | First lien
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	9	11
Recorded Investment | $	$ 931	$ 1,069
Accruing | Residential mortgage | Home equity - lines of credit
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	1
Recorded Investment | $	$ 18	$ 24
Nonaccruing
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	9	9
Recorded Investment | $	$ 2,268	$ 695
Nonaccruing | Commercial Real Estate | Owner-occupied
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	4	1
Recorded Investment | $	$ 1,909	$ 37
Nonaccruing | Residential mortgage | First lien
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	5	8
Recorded Investment | $	$ 359	$ 658