LONG TERM DEBT - Schedule of Long Term Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Principal	$ 805,000	$ 949,755
Unamortized debt discounts and premiums	13,217	2,041
Unamortized debt issuance costs	(14,780)	(6,953)
Total debt	803,437	944,843
Less current portion of long-term debt	0	(65,000)
Total long-term debt	803,437	879,843
Write-off of debt issuance costs	0	1,543	$ 0
Unsecured Notes Due 2028 | Unsecured Debt
Line of Credit Facility [Line Items]
Principal	750,000	0
8.5% Second Lien Notes due 2023
Line of Credit Facility [Line Items]
Principal	0	287,755
Unsecured Ven Bakken Note | Unsecured Debt
Line of Credit Facility [Line Items]
Principal	0	130,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Principal	55,000	532,000
Write-off of debt issuance costs	0	1,500
Revolving Credit Facility | Other Noncurrent Assets
Line of Credit Facility [Line Items]
Unamortized debt issuance costs	$ (5,700)	$ (6,500)