CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
TOTAL REVENUES, NET	$ 687,588	$ 699,727	$ 1,507,993	$ 1,420,138
COSTS AND EXPENSES:
Cost of revenues	336,096	388,208	724,895	780,117
Selling, general and administrative	173,258	152,297	340,026	303,420
Research and development	30,495	26,348	62,110	59,834
Litigation-related and other contingencies, net	(8,572)	10,315	(25,748)	10,321
Asset impairment charges	0	88,438	97,785	253,886
Acquisition-related and integration items, net	6,045	(5,507)	18,507	(43,008)
Interest expense, net	129,164	134,809	262,041	267,484
Gain on extinguishment of debt	0	0	0	(119,828)
Other (income) expense, net	(4,150)	(597)	(18,124)	4,205
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAX	25,252	(94,584)	46,501	(96,293)
INCOME TAX EXPENSE (BENEFIT)	7,642	3,468	(128,690)	14,371
INCOME (LOSS) FROM CONTINUING OPERATIONS	17,610	(98,052)	175,191	(110,664)
DISCONTINUED OPERATIONS, NET OF TAX (NOTE 3)	(7,052)	(7,953)	(34,703)	(13,914)
NET INCOME (LOSS)	$ 10,558	$ (106,005)	$ 140,488	$ (124,578)
NET INCOME (LOSS) PER SHARE—BASIC:
Continuing operations (in dollars per share)	$ 0.08	$ (0.43)	$ 0.77	$ (0.49)
Discontinued operations (in dollars per share)	(0.03)	(0.04)	(0.16)	(0.06)
Basic (in dollars per share)	0.05	(0.47)	0.61	(0.55)
NET INCOME (LOSS) PER SHARE—DILUTED:
Continuing operations (in dollars per share)	0.08	(0.43)	0.75	(0.49)
Discontinued operations (in dollars per share)	(0.03)	(0.04)	(0.15)	(0.06)
Diluted (in dollars per share)	$ 0.05	$ (0.47)	$ 0.60	$ (0.55)
WEIGHTED AVERAGE SHARES:
Basic (in shares)	229,716	226,221	228,457	225,408
Diluted (in shares)	233,681	226,221	233,348	225,408