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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Gross amount of debt extinguished.

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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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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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Debt and Credit Agreements - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended
	Jul. 31, 2020	Jun. 30, 2020	Apr. 23, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Current portion of long-term debt		$ 175,000		$ 87,000
Revolving credit facility
Debt Instrument [Line Items]
Borrowing base			$ 3,200,000
Remaining borrowing capacity		1,500,000	$ 1,500,000
Long-term debt		0		0
6.51% weighted-average senior notes
Debt Instrument [Line Items]
Current portion of long-term debt		$ 87,000		87,000
Weighted average interest rate		6.51%
Long-term debt		$ 124,000		$ 124,000
Subsequent event \| 6.51% weighted-average senior notes
Debt Instrument [Line Items]
Repaid debt	$ 87,000
Weighted average interest rate	6.51%