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Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 20, 2019	Nov. 08, 2019	Mar. 21, 2019	Dec. 31, 2018	Apr. 26, 2018	Apr. 30, 2014
Debt Instrument
Long-term debt	$ 1,842,549				$ 1,529,501
2028 Notes \| Senior Notes
Debt Instrument
Long term debt gross	500,000				0
Less: Deferred financing costs, net of amortization	(8,090)	$ (8,200)			0
Long-term debt	491,910				0
2027 Notes \| Senior Notes
Debt Instrument
Long term debt gross	500,000				0
Less: Deferred financing costs, net of amortization	(7,999)			$ (8,800)	0
Long-term debt	492,001				0
2022 Notes \| Senior Notes
Debt Instrument
Long term debt gross	350,000				350,000
Less: Debt discount, net of amortization	(2,046)				(2,766)		$ (5,700)
Less: Deferred financing costs, net of amortization	(2,316)				(3,133)
Long-term debt	345,638				344,101
2021 Notes \| Senior Notes
Debt Instrument
Long term debt gross	0				350,000
Less: Debt discount, net of amortization	0				(1,789)
Less: Deferred financing costs, net of amortization	0				(2,311)
Long-term debt	0				345,900
Revolving Credit Facility
Debt Instrument
Less: Deferred financing costs, net of amortization			$ (6,400)			$ (3,300)
Revolving Credit Facility \| Credit Facility
Debt Instrument
Long-term debt	$ 513,000				$ 839,500