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Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Asset Impairment Charges				$ 168,400
Revenue from Contract with Customer, Excluding Assessed Tax	$ 443,747	$ 116,520	$ 700,441	495,431
Third party products	23,001	8,443	36,622	24,419
Fixed fee contracts	5,134	3,237	12,827	12,156
Other	551	5,147	1,667	10,522
Operating Income (Loss)	138,851	(113,252)	163,454	(224,255)
Depreciation and amortization	44,522	$ 43,296	87,696	$ 86,995
Assets	$ 3,874,706		$ 3,874,706		$ 3,258,925

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