Industry Segments - Corporate Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
General and administrative expense	$ 30,537	$ 34,277
Depreciation, amortization, and accretion	29,460	30,628
Interest expense, net	17,856	18,379
Fair Value Adjustment of Warrants	(337)	407
Other (income) expense, net	439	(951)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	10,231	18,674
Corporate Overhead [Member]
Segment Reporting Information [Line Items]
General and administrative expense	8,081	12,089
Depreciation, amortization, and accretion	197	168
Interest expense, net	5,455	5,342
Fair Value Adjustment of Warrants	(338)	407
Other (income) expense, net	49	(319)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 13,444	$ 17,687