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Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Asset Impairment Charges				$ 168,400
Revenue from Contract with Customer, Excluding Assessed Tax	$ 423,796	$ 181,916	$ 1,124,237	677,347
Third party products	24,541	11,337	61,164	35,756
Fixed fee contracts	11,117	5,284	23,943	17,440
Other	15	2,447	1,682	12,969
Operating Income (Loss)	66,289	(33,081)	229,744	(257,337)
Depreciation and amortization	46,399	$ 45,291	134,095	$ 132,285
Assets	$ 3,766,753		$ 3,766,753		$ 3,258,925

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