CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
TOTAL REVENUES, NET	$ 717,919	$ 820,405
COSTS AND EXPENSES:
Cost of revenues	305,293	388,799
Selling, general and administrative	187,174	166,768
Research and development	29,739	31,615
Litigation-related and other contingencies, net	637	(17,176)
Asset impairment charges	3,309	97,785
Acquisition-related and integration items, net	(5,022)	12,462
Interest expense, net	134,341	132,877
Loss on extinguishment of debt	13,753	0
Other expense (income), net	912	(13,974)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAX	47,783	21,249
INCOME TAX EXPENSE (BENEFIT)	724	(136,332)
INCOME FROM CONTINUING OPERATIONS	47,059	157,581
DISCONTINUED OPERATIONS, NET OF TAX (NOTE 3)	(5,535)	(27,651)
NET INCOME	$ 41,524	$ 129,930
NET INCOME (LOSS) PER SHARE—BASIC:
Continuing operations (in dollars per share)	$ 0.20	$ 0.69
Discontinued operations (in dollars per share)	(0.02)	(0.12)
Basic (in dollars per share)	0.18	0.57
NET INCOME (LOSS) PER SHARE—DILUTED:
Continuing operations (in dollars per share)	0.20	0.68
Discontinued operations (in dollars per share)	(0.03)	(0.12)
Diluted (in dollars per share)	$ 0.17	$ 0.56
WEIGHTED AVERAGE SHARES:
Basic (in shares)	230,551	227,198
Diluted (in shares)	238,671	233,014