Reconciling Information Between Reportable Segments and Consolidated Totals (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting Information [Line Items]
Operating income	$ 25,742	$ 3,119
Interest income	388	135
Interest expense, net	(14,878)	(13,080)
Foreign currency translation and transaction gains	14	517
Income attributable to sale of equity interest	2,517	2,139
Other non-operating (expense), net	(161)	(797)
Total income (loss), before income taxes and equity in losses of investees	$ 13,622	$ (7,967)