COMMITMENTS AND CONTINGENCIES - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Sep. 30, 2020	Mar. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Product Liability Contingency [Line Items]
Environmental trust liability			$ 22,415	$ 8,615
Long term purchase commitment, Amount	$ 15,000
Contractual obligation, Per month amount	$ 158,000
Contract terms		The contract ends in September 2030 and may be terminated by either party with 12 months' notice after the initial 10-year period.
Committed secured financing on equipment amount			92,000
Additional commitment and contingency amount			31,700
Coal ash impoundment [Member]
Product Liability Contingency [Line Items]
Environmental Obligations			13,800
Environmental trust liability			8,600	$ 8,600
Selling General And Administrative Expenses Member | Coal ash impoundment [Member]
Product Liability Contingency [Line Items]
Environmental Obligations			$ 11,100