Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
TOTAL REVENUES, NET	$ 720,411	$ 700,527
COSTS AND EXPENSES:
Cost of revenues	391,909	403,598
Selling, general and administrative	151,123	166,667
Research and development	33,486	38,646
Litigation-related and other contingencies, net	6	(2,500)
Asset impairment charges	165,448	448,416
Acquisition-related and integration items	(37,501)	6,835
Interest expense, net	132,675	123,990
Gain on extinguishment of debt	119,828	0
Other expense (income), net	4,802	(2,878)
LOSS FROM CONTINUING OPERATIONS BEFORE INCOME TAX	(1,709)	(482,247)
INCOME TAX EXPENSE	10,903	15,491
LOSS FROM CONTINUING OPERATIONS	(12,612)	(497,738)
DISCONTINUED OPERATIONS, NET OF TAX	(5,961)	(7,751)
NET LOSS	$ (18,573)	$ (505,489)
NET LOSS PER SHARE—BASIC:
Continuing operations (in dollars per share)	$ (0.06)	$ (2.23)
Discontinued operations (in dollars per share)	(0.02)	(0.03)
Basic (in dollars per share)	(0.08)	(2.26)
NET LOSS PER SHARE—DILUTED:
Continuing operations (in dollars per share)	(0.06)	(2.23)
Discontinued operations (in dollars per share)	(0.02)	(0.03)
Diluted (in dollars per share)	$ (0.08)	$ (2.26)
WEIGHTED AVERAGE SHARES:
Basic (shares)	224,594	223,521
Diluted (shares)	224,594	223,521