INCOME TAXES - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Allowance for loan losses	$ 3,418	$ 3,143
Deferred compensation	415	723
Retirement and salary continuation plans	2,357	1,416
Share-based compensation	631	742
Off-balance sheet reserves	234	219
Nonaccrual loan interest	697	537
Net unrealized losses on securities available for sale	127	791
Purchase accounting adjustments	4,081	1,795
Bonus accrual	493	470
Low-income housing credit carryforward	0	641
Net operating loss carryforward	1,872	0
Other	672	321
Total deferred tax assets	14,997	10,798
Deferred tax liabilities:
Depreciation	452	458
Mortgage servicing rights	694	590
Purchase accounting adjustments	1,599	1,021
Other	275	150
Total deferred tax liabilities	3,020	2,219
Net deferred tax asset, included in other assets	$ 11,977	$ 8,579