Segments and Geographic Area Analysis - Long-Lived Tangible Assets by Geographic Location (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Entity-Wide Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries, Amount	$ 4,419,988	$ 4,384,420	$ 3,645,263
Total long lived tangible assets	4,864,972	4,667,469	4,283,792
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Entity-Wide Disclosure on Geographic Areas, Long-Lived Assets in Entity's Country of Domicile	444,984	283,049	638,529
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Entity-Wide Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries, Amount	1,827,247	1,979,303	2,290,412
Australia/Asia/Middle East [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Entity-Wide Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries, Amount	1,474,999	1,212,461	417,121
Europe/Africa/Mediterranean [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Entity-Wide Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries, Amount	799,194	852,300	897,998
Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Entity-Wide Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries, Amount	$ 318,548	$ 340,356	$ 39,732