Supplemental Financial Information - Noncash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Accrued but unpaid capital expenditures at period end	$ 39,169	$ 19,413
Common stock withheld for payroll tax obligations	1,381	1,285
Cash interest payments	76,219	76,219
Foreign [Member]
Cash income taxes paid, net of (refunds):
Cash income taxes paid, net of refunds	13,227	5,941
U.S. Federal [Member]
Cash income taxes paid, net of (refunds):
Cash income taxes paid, net of refunds		(7,389)
State [Member]
Cash income taxes paid, net of (refunds):
Cash income taxes paid, net of refunds	$ (15)	$ 2