Comprehensive Income (Loss) and Accumulated Other Comprehensive Income (Loss) - Comprehensive Income (loss) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Comprehensive Income (Loss) [Line Items]
Income (Loss)	$ 58,976	$ 15,661	$ 63,730	$ 40,155
Foreign currency translation adjustments	5,416	(19,956)	532	1,304
Pension and OPEB, net of tax	2,023	0	2,023	0
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	0	(533)	1,168	(31)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(296)	(700)	(85)	(700)
Other Comprehensive Income (Loss), Tax	66,119	(5,528)	67,368	40,728
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	0		1,555
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	$ 0		$ 0