Schedule of Revenue in Different Geographical Areas (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	$ 1,656,750	[1]	$ 1,429,061	[1]	$ 1,566,162	[1]
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	354,076	[1]	180,441	[1]	136,628	[1]
TAIWAN, PROVINCE OF CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	303,360	[1]	172,700	[1]	286,138	[1]
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	233,573	[1]	221,895	[1]	235,171	[1]
KOREA, REPUBLIC OF
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	225,099	[1]	145,958	[1]	124,738	[1]
JAPAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	105,981	[1]	148,699	[1]	77,518	[1]
PHILIPPINES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	106,609	[1]	130,484	[1]	185,533	[1]
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	84,508	[1]	101,208	[1]	99,580	[1]
SINGAPORE
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	80,571	[1]	90,622	[1]	145,543	[1]
THAILAND
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	76,069	[1]	80,539	[1]	56,978	[1]
MALAYSIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	71,151	[1]	138,107	[1]	207,471	[1]
Rest Of The World
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue to unaffiliated customers	$ 15,753	[1]	$ 18,408	[1]	$ 10,864	[1]

[1] Revenues are attributable to geographic areas based on location of customer site.