Supplemental Cash Flow Information - Supplemental Cash Flow Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement Of Cash Flows [Abstract]
Income tax refunds received	$ 11,165	$ 8,382	$ 8,432
Income taxes paid	(79,778)	(34,854)	(18,759)
Interest paid, net of amount capitalized	$ (60,340)	$ (41,854)	$ (43,980)