PENSION PLANS AND OTHER POST-RETIREMENT BENEFITS - Contributions (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2021 USD ($) employee item	Dec. 31, 2021 USD ($) item employee	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) item
Defined benefit plans
Number of non-contributory qualified defined benefit pension plans | item		3
New benefits accrued	$ 0	$ 0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	(5,900,000)
Defined Benefit Plans
Defined benefit plans
New benefits accrued	0	0
Defined Benefit Plan, Benefit Obligation	744,463,000	744,463,000	$ 826,120,000	$ 759,821,000
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements		(5,864,000)		(6,726,000)
Employer contributions		20,755,000	24,039,000
Group annuity contract
Defined benefit plans
Defined Benefit Plan, Benefit Obligation	$ 47,100,000	$ 47,100,000		$ 24,400,000
Number Of Participants Transferred | item		400		500
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements		$ 5,900,000		$ (6,700,000)
Post-retirement Benefit Obligations
Defined benefit plans
Number of persons eligible to become a new participant | employee	0	0
Defined Benefit Plan, Benefit Obligation	$ 96,434,000	$ 96,434,000	106,704,000	$ 107,132,000
Assets in unfunded plans	$ 0	0
Employer contributions		$ 8,638,000	$ 9,159,000
Weighted-average assumptions used to determine the projected benefit obligations and net periodic benefit cost
Health care trend rate assumed for the next fiscal year (as a percent)	6.25%	6.25%
Ultimate health care cost trend rate (as a percent)	5.00%	5.00%
Supplemental Plans
Defined benefit plans
Number of non-qualified plans | item		2
Number of persons eligible to become a new participant | item	0	0
Assets in unfunded plans	$ 0	$ 0