Income Taxes - Additional Information (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
Operating Loss Carryforwards [Line Items]
Income tax expense	$ 40,004	$ 17,003	$ 81,650	$ 29,083
Effective tax rate for continuing operations	31.00%	23.00%	31.70%	23.30%
U.S. federal statutory rate			35.00%
Discrete tax expense	1,937		2,056
Discrete tax benefit/expense		8,052		9,486
Valuation allowance amount	29,564		29,564
Liability for uncertain tax positions noncurrent	984		984
U.S.
Operating Loss Carryforwards [Line Items]
Valuation allowance amount	19,838		19,838
Non U.S.
Operating Loss Carryforwards [Line Items]
Valuation allowance amount	9,727		9,727
Non U.S Net Operating Losses	8,131		8,131
Foreign tax credits	$ 1,596		$ 1,596