Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net (Loss) to Common Stockholders, Basic EPS	$ (188,118)	$ (22,267)
Net (Loss) Income to Common Stockholders, Diluted EPS	$ (188,118)	$ (22,267)
Average Shares, Basic EPS	98,823	98,537
Average Shares, Diluted EPS	98,823	98,537
(Loss) income per Share, Basic EPS	$ (1.90)	$ (0.23)
(Loss) income per Share, Diluted EPS	$ (1.90)	$ (0.23)