Consolidated Statement of Operations - USD ($) $ in Thousands	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Consolidated Statement of Operations
Revenue	$ 393,586	$ 373,545	$ 390,849	$ 404,357	$ 399,643	$ 383,030	$ 410,382	$ 393,167	$ 795,206	$ 803,549	$ 1,168,751	$ 1,186,579	$ 1,562,337	$ 1,586,222	$ 1,145,891
Cost of revenue (exclusive of depreciation and amortization)	314,858	295,445	303,831	310,601	306,654	296,685	315,167	294,897	614,432	610,064	909,877	906,749	1,224,735	1,213,403	827,544
Selling, general and administrative expenses (exclusive of depreciation and amortization)	49,678	48,347	51,162	49,677	48,114	44,897	46,378	45,519	100,839	91,897	149,186	136,794	198,864	184,908	220,955
Depreciation and amortization	24,421	25,079	24,779	26,624	33,684	33,410	34,744	36,239	51,403	70,982	76,482	104,393	100,903	138,077	98,890
Impairment of goodwill and other intangible assets	252,399	97,158			48,127						97,158		349,557	48,127	69,437
Related party expense	1,742	1,430	5,331	998	3,664	775	6,783	1,181	6,329	7,964	7,759	8,739	9,501	12,403	33,431
Operating loss	(249,512)	(93,914)	5,746	16,457	(40,600)	7,263	7,310	15,331	22,203	22,642	(71,711)	29,904	(321,223)	(10,696)	(104,366)
Other expense (income), net:
Interest expense, net	43,216	40,573	39,959	39,701	38,999	39,087	39,229	38,676	79,660	77,905	120,235	116,992	163,449	155,991	129,676
Debt modification and extinguishment costs			1,404			1,067			1,404		1,404	1,067	1,404	1,067	35,512
Sundry expense (income), net	600	(165)	1,311	(2,715)	(905)	2,283	2,122	(229)	(1,404)	1,893	(1,569)	4,176	969	(3,271)	2,295
Other expense (income), net	10,003	406	2,527	1,493	2,567	(1,069)	(907)	(3,621)	4,020	(4,528)	4,424	(5,597)	14,429	(3,030)	(1,297)
Net loss before income taxes	(302,131)	(135,058)	(36,833)	(27,452)	(83,071)	(29,539)	(28,890)	(19,953)	(64,285)	(48,842)	(199,343)	(78,382)	(501,474)	(161,453)	(270,552)
Income tax (expense) benefit	(1,953)	3,769	(4,738)	(4,720)	(3,442)	733	(1,619)	(4,025)	(9,458)	(5,644)	(5,689)	(4,911)	(7,642)	(8,353)	61,068
Net loss	(304,084)	(131,289)	(41,571)	(32,172)	(86,513)	(28,806)	(30,509)	(23,978)	(73,743)	(54,486)	(205,032)	(83,293)	(509,116)	(169,806)	(209,484)
Dividend equivalent on Series A Preferred Stock related to beneficial conversion feature													0	0	(16,375)
Cumulative dividends for Series A Preferred Stock	(597)	(884)	(914)	(914)	(914)	(914)	(914)	(914)	(1,828)	(1,828)	(2,712)	(2,742)	(3,309)	(3,655)	(2,489)
Net loss attributable to common stockholders	$ (304,681)	$ (132,173)	$ (42,485)	$ (33,086)	$ (87,427)	$ (29,720)	$ (31,423)	$ (24,892)	$ (75,571)	$ (56,314)	$ (207,744)	$ (86,035)	$ (512,425)	$ (173,461)	$ (228,348)
Loss per share - Basic and diluted (in dollars per share)	$ (2.09)	$ (0.91)	$ (0.29)	$ (0.23)	$ (0.59)	$ (0.20)	$ (0.21)	$ (0.17)					$ (3.52)	$ (1.17)	$ (2.18)