Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument
Long-term debt	$ 1,731,459	$ 1,842,549
Credit Facility
Debt Instrument
Long-term debt	746,000	513,000
2028 Notes
Debt Instrument
Long term debt gross	500,000	500,000
Less: Deferred financing costs, net of amortization	(7,357)	(8,090)
Long-term debt	492,643	491,910
2027 Notes
Debt Instrument
Long term debt gross	500,000	500,000
Less: Deferred financing costs, net of amortization	(7,184)	(7,999)
Long-term debt	$ 492,816	492,001
2022 Notes
Debt Instrument
Long term debt gross		350,000
Less: Debt discount, net of amortization		(2,046)
Less: Deferred financing costs, net of amortization		(2,316)
Long-term debt		$ 345,638

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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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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