Components of Income Tax Expense Attributable to Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Current income tax expense, Federal	$ 56,501	$ 23,933	$ 72,807
Current income tax expense, State	(24)	7,803	7,351
Current income tax expense, Foreign	45,721	34,053	21,003
Current income tax expense	102,198	65,789	101,161
Deferred income tax (benefit) expense, Federal	(33,724)	19,837	25,122
Deferred income tax (benefit) expense, State	578	322	(2,353)
Deferred income tax (benefit) expense, Foreign	(21,974)	(10,217)	(3,588)
Deferred income tax (benefit) expense	(55,120)	9,942	19,181
Income tax expense	$ 47,078	$ 75,731	$ 120,342