Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Income Before Income Taxes (Detail)

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Income Taxes - Components of Income Before Income Taxes (Detail) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]      
Domestic $ 172,300,000 $ 143,900,000 $ 69,500,000
Foreign 478,600,000 415,900,000 310,600,000
Income before income taxes $ 650,906,000 $ 559,779,000 $ 380,095,000