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ASSET RETIREMENT OBLIGATIONS (Tables)
12 Months Ended
Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Asset Retirement Obligation Changes A roll-forward of the Company's asset retirement obligation is as follows (in thousands):
Year Ended December 31,
20212020
Balance, beginning of year$28,699 $27,908 
Additional liabilities incurred183,758 357 
Accretion expense3,933 1,004 
Liabilities settled(4,221)(2,464)
Revisions to estimate13,146 1,894 
Balance, end of year$225,315 $28,699 
Current portion24,000 — 
Long-term portion$201,315 $28,699