PENSION AND OTHER POSTRETIREMENT BENEFITS - Schedule of Defined Benefit Plans Disclosure (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 1,319	$ 1,591	$ 2,638	$ 3,182
Interest Cost	3,415	3,236	6,830	6,472
Expected Return on Plan Assets	(6,201)	(5,834)	(12,402)	(11,668)
Amortizations:
Prior Service Cost	18	25	36	50
Actuarial Loss	1,839	3,194	3,678	6,388
Net Periodic Benefit Cost	390	2,212	780	4,424
Capitalized Benefit Cost	(491)	(566)	(996)	(1,132)
Deferred Benefit Cost (Credit)	334	(316)	668	(632)
Total Net Periodic Benefit Expense	233	1,330	452	2,660
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service Cost	173	212	346	424
Interest Cost	502	475	1,004	950
Expected Return on Plan Assets	(1,692)	(1,436)	(3,384)	(2,872)
Amortizations:
Prior Service Cost	(156)	(156)	(312)	(312)
Actuarial Loss	35	273	70	546
Net Periodic Benefit Cost	(1,138)	(632)	(2,276)	(1,264)
Capitalized Benefit Cost	(60)	(106)	(120)	(212)
Deferred Benefit Cost (Credit)	532	336	1,064	673
Total Net Periodic Benefit Expense	$ (666)	$ (402)	$ (1,332)	$ (803)