RETIREMENT PLANS (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) plan	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Plan participant service requirement, period	1 month
Plan participant age required	18 years
Maximum annual contributions per employee	$ 58
Maximum annual contributions per employee, percent	100.00%
Employer matching contribution, percent of match of base contribution by employee	0.50
Employer matching contribution, percent of employee contribution	6.00%
Employer contribution expense	$ 669	$ 626	$ 590
Deferred compensation arrangement
Defined Benefit Plan Disclosure [Line Items]
Age at which a director or his beneficiaries will receive a monthly retirement benefit	65 years
Estimated present value of future benefits to be paid	$ 36	53
Plan expense	5	7	8
Supplemental discretionary deferred compensation plans
Defined Benefit Plan Disclosure [Line Items]
Plan expense	61	61	61
Trust account balance	2,300	2,500
Supplemental retirement and salary continuation plans
Defined Benefit Plan Disclosure [Line Items]
Estimated present value of future benefits to be paid	12,300	11,400
Plan expense	$ 1,700	1,500	1,000
Number of supplemental retirement and salary continuation plans | plan	2
Life insurance coverage post-retirement
Defined Benefit Plan Disclosure [Line Items]
Estimated present value of future benefits to be paid	$ 1,600	1,500
Plan expense	$ 104	$ 25	$ 22