Condensed Consolidated Statement of Operations - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Consolidated Statement of Operations
Revenue	$ 399,643	$ 383,030	$ 410,382	$ 393,167	$ 386,289	$ 338,393	$ 209,382	$ 218,260	$ 1,586,222	$ 1,152,324	$ 789,926
Cost of revenue (exclusive of depreciation and amortization)	306,192	295,936	313,954	293,792	289,901	255,116	140,418	143,708	1,209,874	829,143	519,121
Selling, general and administrative expenses	47,420	44,913	46,723	45,595	48,328	102,048	34,998	35,581	184,651	220,955	130,437
Depreciation and amortization	36,057	35,041	36,368	38,019	28,112	28,052	21,406	21,320	145,485	98,890	79,639
Impairment of goodwill and other intangible assets	48,127				69,437				48,127	69,437
Related party expense	1,068	759	1,402	1,105	1,698	26,892	2,456	2,385	4,334	33,431	10,493
Operating (loss) income	(39,221)	6,381	11,935	14,656	(51,187)	(73,715)	10,104	15,266	(6,249)	(99,532)	50,236
Other expense (income), net:
Interest expense, net	38,212	38,339	38,527	38,017	36,749	37,652	27,869	26,219	153,095	128,489	109,414
Loss on extinguishment of debt		1,067				35,512			1,067	35,512
Sundry expense (income),net	(1,689)	2,571	2,325	64	665	(563)	327	(2,724)	3,271	(2,295)	(712)
Other income, net	1,783	(781)	(704)	(3,328)	(1,297)				(3,030)	(1,297)
Net loss before income taxes	(80,905)	(29,673)	(23,563)	(19,969)	(85,974)	(147,442)	(17,438)	(13,677)	(154,110)	(264,531)	(59,890)
Income tax (expense) benefit	(3,496)	733	(1,619)	(4,025)	27,322	37,002	(2,074)	(2,004)	(8,407)	60,246	11,787
Net loss	(84,401)	(28,940)	(25,182)	(23,994)	(58,652)	(110,440)	(19,512)	(15,681)	(162,517)	(204,285)	(48,103)
Dividend equivalent on Series A Preferred Stock related to beneficial conversion feature						(16,375)			0	(16,375)
Cumulative dividends for Series A Preferred Stock	(914)	(914)	(914)	(914)	(1,264)	(1,225)			(3,655)	(2,489)
Net loss attributable to common stockholders	$ (85,315)	$ (29,854)	$ (26,096)	$ (24,908)	$ (59,916)	$ (128,040)	$ (19,512)	$ (15,681)	$ (166,172)	$ (223,149)	$ (48,103)
Loss per share - basic and diluted (in dollars per share)	$ (0.54)	$ (0.20)	$ (0.17)	$ (0.16)	$ (0.40)	$ (0.92)	$ (0.28)	$ (0.23)	$ (1.09)	$ (2.08)	$ (0.75)