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EMPLOYEE BENEFIT PLANS - Summary of Financial Data Relative to the Pension Plans and the Postretirement Benefit Plan (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2021
Pension Plan [Member]    
Net periodic benefit (income) loss:    
Interest cost $ 618 $ 1,854
Estimated return on plan asset (1,131) (3,393)
Net periodic benefit (income) loss (513) (1,539)
Postretirement Benefit Plan [Member]    
Net periodic benefit (income) loss:    
Interest cost 1 4
Estimated return on plan asset 1 1
Net periodic benefit (income) loss $ 2 $ 5