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LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Impaired Loans That Are TDRs (Detail) $ in Thousands	Dec. 31, 2020 USD ($) contract	Dec. 31, 2019 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	16	20
Recorded Investment | $	$ 1,254	$ 3,247
Accruing
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	11	11
Recorded Investment | $	$ 934	$ 979
Accruing | Commercial Real Estate | Owner-occupied
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	1
Recorded Investment | $	$ 28	$ 30
Accruing | Residential mortgage | First lien
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	9	9
Recorded Investment | $	$ 898	$ 931
Accruing | Residential mortgage | Home equity - lines of credit
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	1
Recorded Investment | $	$ 8	$ 18
Nonaccruing
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	5	9
Recorded Investment | $	$ 320	$ 2,268
Nonaccruing | Commercial Real Estate | Owner-occupied
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	4
Recorded Investment | $	$ 0	$ 1,909
Nonaccruing | Residential mortgage | First lien
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	5	5
Recorded Investment | $	$ 320	$ 359

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Amount of financing receivable modified as troubled debt restructuring.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

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