Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Instruments
Long-term debt	$ 1,688,867	$ 1,842,549
Credit Facility
Debt Instruments
Long-term debt	393,000	513,000
2028 Notes
Debt Instruments
Long term debt gross	800,000	500,000
Add: Debt premium, net of amortization	14,541
Less: Deferred financing costs, net of amortization	(11,766)	(8,090)
Long-term debt	802,775	491,910
2027 Notes
Debt Instruments
Long term debt gross	500,000	500,000
Less: Deferred financing costs, net of amortization	(6,908)	(7,999)
Long-term debt	$ 493,092	492,001
2022 Notes
Debt Instruments
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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