EMPLOYEE BENEFIT PLANS - Changes in Accumulated Other Comprehensive Loss of the Pension Plans and Postretirement Benefit Plan (Detail) $ in Thousands	4 Months Ended
	Dec. 31, 2020 USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 404
Total increase in other comprehensive loss	404
Accumulated other comprehensive loss at end of period	404
Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	28
Total increase in other comprehensive loss	28
Accumulated other comprehensive loss at end of period	$ 28