Business Segment and Related Information - Reconciliation of Segment Gross Profit to Net Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting [Abstract]
Segment gross profit	$ 12,043	$ 13,859	$ 33,574	$ 27,173
General and administrative expenses	(4,853)	(14,096)	(27,246)	(45,481)
Impairment expense	(6,399)	0	(6,399)	0
Interest expense, net	(4,331)	(3,833)	(12,787)	(12,987)
Loss on extinguishment of debt	0	0	(8,603)	0
Income from equity method investment	625	667	1,247	1,884
Income tax (expense) benefit	(608)	1,100	(608)	7,489
Net loss	$ (3,523)	$ (2,303)	$ (20,822)	$ (21,922)