Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Weighted average interest rate of long-term debt outstanding calculated over time.

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The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

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The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

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Debt Instrument, Interest Rate, Discount Percentage

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Line of Credit Facility, Borrowing Base, Number of Redeterminations

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Line of Credit Facility, Borrowing Base, Period of Redetermination

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DEBT - Narrative (Details)		3 Months Ended	9 Months Ended
DEBT - Narrative (Details)	Oct. 16, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 USD ($) redeterminations	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)	Jul. 20, 2018 USD ($)
Line of Credit Facility [Line Items]
Debt repurchased			$ 19,697,000	$ 0
Revolving credit facility
Line of Credit Facility [Line Items]
Debt outstanding		$ 126,500,000	$ 126,500,000		$ 96,500,000
Credit facility maximum borrowing capacity						$ 2,000,000,000.0
Number of interim redeterminations that may be requested \| redeterminations			3
Period of redeterminations of borrowing base			12 months
Credit facility borrowing base		580,000,000.0	$ 580,000,000.0			$ 775,000,000.0
Debt outstanding		126,500,000	126,500,000
Credit facility remaining borrowing capacity		$ 453,500,000	$ 453,500,000
Weighted average interest rate		2.14%	2.66%
5.375 % Senior Notes due 2027
Line of Credit Facility [Line Items]
Debt outstanding		$ 479,938,000	$ 479,938,000		$ 500,000,000
5.375 % Senior Notes due 2027 \| Senior Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 500,000,000.0
Debt instrument, interest rate, stated percentage	5.375%
Proceeds from issuance of senior long-term debt	$ 490,000,000.0
Debt repurchased		6,000,000.0	20,100,000
Debt outstanding		$ 479,900,000	$ 479,900,000
5.375 % Senior Notes due 2027 \| Senior Notes \| Minimum
Line of Credit Facility [Line Items]
Discount rate		97.50%	97.50%
5.375 % Senior Notes due 2027 \| Senior Notes \| Maximum
Line of Credit Facility [Line Items]
Discount rate		98.50%	98.50%