Supplemental Financial Information - Noncash Investing and Financing Activities (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Financial Statements, Captions [Line Items]
Accrued but unpaid capital expenditures at period end	$ 86,274	$ 56,595	$ 37,325
Income tax benefits related to exercise of stock options	1,081	1,083	863
Cash interest payments	82,938	83,125	82,938
U.S federal [Member]
Cash income taxes paid, net of refunds:
Cash income taxes paid, net of refunds	62,000	71,000	94,843
Foreign [Member]
Cash income taxes paid, net of refunds:
Cash income taxes paid, net of refunds	78,041	72,249	150,465
State [Member]
Cash income taxes paid, net of refunds:
Cash income taxes paid, net of refunds	$ 190	$ 243	$ 210