Components of Provision for Income Taxes from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Provision For Income Taxes [Line Items]
Current (domestic)	$ 483	$ 0	$ 0
Current (foreign)	12,797	14,687	17,391
Deferred (domestic)	(1,680)	1,499	(3,367)
Deferred (foreign)	97	21,326	(27,885)
Income tax (benefit)/expense	$ 11,697	$ 37,512	$ (13,861)