Supplemental Guarantor Information (Summarized Statements of Operations Information) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Total revenues	$ 321,497	$ 365,274
Cost of revenues	211,686	240,053
Loss from operations before income taxes	(42,589)	(28,967)
Income taxes	(10,254)	3,677
Net loss from continuing operations	(32,335)	(32,644)
Loss from discontinued operations, net of tax	(47,129)	(15,061)
Net loss	(79,464)	$ (47,705)
Obligor Group [Member]
Condensed Financial Statements, Captions [Line Items]
Total revenues	245,797		$ 1,126,456
Cost of revenues	160,926		723,451
Loss from operations before income taxes	(37,265)		(92,731)
Income taxes	(12,325)		6,102
Net loss from continuing operations	(24,940)		(98,833)
Loss from discontinued operations, net of tax	(47,129)		(177,968)
Net loss	$ (72,069)		$ (276,801)