Net (Loss) Income per Share (Net Income Per Basic and Diluted Share) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator
Net loss from continuing operations	$ (12,929)	$ (8,016)	$ (32,188)	$ (16,466)
Less: (Loss) income from discontinued operations	(37,399)	3,502	(50,151)	18,569
Net Income (Loss) Attributable to Parent	$ (49,971)	$ (4,419)	$ (81,694)	$ 2,261
Denominator
Total weighted-average shares used to compute net income per basic share (in Shares)	115,908	118,285	119,402	123,484
Diluted (in Shares)	115,908	118,285	119,402	123,484
Income (Loss) from Continuing Operations, Per Basic Share	$ (0.11)	$ (0.07)	$ (0.26)	$ (0.13)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	(0.32)	0.03	(0.42)	0.15
Basic (in Dollars per Share)	(0.43)	(0.04)	(0.68)	0.02
Income (Loss) from Continuing Operations, Per Diluted Share	(0.11)	(0.07)	(0.26)	(0.13)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	(0.32)	0.03	(0.42)	0.15
Net income per diluted share (in Dollars per Share)	$ (0.43)	$ (0.04)	$ (0.68)	$ 0.02