CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
TOTAL REVENUES, NET	$ 713,830	$ 687,588	$ 1,431,749	$ 1,507,993
COSTS AND EXPENSES:
Cost of revenues	318,480	336,096	623,773	724,895
Selling, general and administrative	177,619	173,258	364,793	340,026
Research and development	34,669	30,495	64,408	62,110
Litigation-related and other contingencies, net	35,195	(8,572)	35,832	(25,748)
Asset impairment charges	4,929	0	8,238	97,785
Acquisition-related and integration items, net	97	6,045	(4,925)	18,507
Interest expense, net	141,553	129,164	275,894	262,041
Loss on extinguishment of debt	0	0	13,753	0
Other expense (income), net	372	(4,150)	1,284	(18,124)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAX	916	25,252	48,699	46,501
INCOME TAX EXPENSE (BENEFIT)	11,100	7,642	11,824	(128,690)
(LOSS) INCOME FROM CONTINUING OPERATIONS	(10,184)	17,610	36,875	175,191
DISCONTINUED OPERATIONS, NET OF TAX (NOTE 3)	(5,316)	(7,052)	(10,851)	(34,703)
NET (LOSS) INCOME	$ (15,500)	$ 10,558	$ 26,024	$ 140,488
NET (LOSS) INCOME PER SHARE—BASIC:
Continuing operations (in dollars per share)	$ (0.04)	$ 0.08	$ 0.16	$ 0.77
Discontinued operations (in dollars per share)	(0.03)	(0.03)	(0.05)	(0.16)
Basic (in dollars per share)	(0.07)	0.05	0.11	0.61
NET (LOSS) INCOME PER SHARE—DILUTED:
Continuing operations (in dollars per share)	(0.04)	0.08	0.16	0.75
Discontinued operations (in dollars per share)	(0.03)	(0.03)	(0.05)	(0.15)
Diluted (in dollars per share)	$ (0.07)	$ 0.05	$ 0.11	$ 0.60
WEIGHTED AVERAGE SHARES:
Basic (in shares)	233,331	229,716	231,941	228,457
Diluted (in shares)	233,331	233,681	237,043	233,348