Supplemental Guarantor Information (Summarized Statements of Operations Information) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 166,928		$ 356,600	$ 356,585			$ 672,278	$ 1,089,297
Cost of revenues	116,233			231,927			456,722	701,512
Loss from operations before income taxes	(94,311)			(18,799)			(202,271)	(63,885)
Income taxes	4,990			1,708			(11,772)	7,707
Net loss from continuing operations	(99,301)			(20,507)			(190,499)	(71,592)
Loss from discontinued operations, net of tax	(58,003)			(17,934)			(111,375)	(85,604)
Net loss	$ (157,304)	$ (65,106)	$ (79,464)	$ (38,441)	$ (71,050)	$ (47,705)	(301,874)	$ (157,196)
Obligor Group [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues							507,636		$ 1,126,456
Cost of revenues							343,561		723,451
Loss from operations before income taxes							(179,335)		(92,731)
Income taxes							(13,404)		6,102
Net loss from continuing operations							(165,931)		(98,833)
Loss from discontinued operations, net of tax							(111,375)		(177,968)
Net loss							$ (277,306)		$ (276,801)