v3.20.4
EMPLOYEE BENEFIT PLANS Table 4 - Amounts Recorded as a Component of Accumulated Other Comprehensive (Loss) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Unrecognized actuarial loss $ (24,878) $ (24,564)
Prior service credit 10,433 12,490
Deferred tax asset (liability) 118 90
Accumulated other comprehensive income (loss), net of tax (14,327) (11,984)
Other Postretirement Benefit Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Unrecognized actuarial loss (3,846) (3,190)
Prior service credit 6,029 7,174
Deferred tax asset (liability) 0 0
Accumulated other comprehensive income (loss), net of tax $ 2,183 $ 3,984