Operating Segments and Geographic Information - Reconciliations of Other Segment Measures to Consolidated Totals (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	$ 2,584,583	$ 1,788,120	$ 1,696,484
Total acquisition of property, plant and equipment	41,010	40,053	28,194
Total depreciation and amortization	(59,355)	(50,174)	(55,279)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	2,288,951	1,399,167	1,273,834
Total acquisition of property, plant and equipment	39,879	28,450	22,641
Total depreciation and amortization	(57,887)	(48,113)	(46,915)
Corporate assets [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets	295,632	328,469	367,779
Total acquisition of property, plant and equipment	336	10,483	3,655
Discontinued operations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total assets		60,484	54,871
Total acquisition of property, plant and equipment	795	1,120	1,898
Total depreciation and amortization	$ (1,468)	$ (2,061)	$ (8,364)