Business Segments - Geographic Information for Revenues, Based on Country of Origin, and Long-Lived Assets (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 4,200,836,000	$ 3,907,820,000	$ 3,342,708,000
Long-Lived Assets	1,052,668,000	969,103,000	852,442,000
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,914,721,000	2,675,532,000	2,286,744,000
Long-Lived Assets	545,169,000	499,753,000	460,362,000
PRC [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	879,424,000	833,146,000	727,758,000
Long-Lived Assets	357,782,000	354,351,000	347,999,000
Rest of world [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	406,691,000	399,142,000	328,206,000
Long-Lived Assets	$ 149,717,000	$ 114,999,000	$ 44,081,000