Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 5,831	$ 8,470	$ 12,409
Additions (deductions) charged to costs and expenses	3,639	(518)	(1,352)
Accounts written off	(824)	(1,219)	(2,716)
Translation adjustments	647	(902)	129
Balance at end of period	9,293	5,831	8,470
Valuation allowance on credit and operating loss carryforwards and other net deferred tax assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	290,879	288,182	212,705
Additions (deductions) charged to costs and expenses	153,718	8,743	91,632
Translation adjustments	6,136	(6,046)	(16,155)
Balance at end of period	$ 450,733	$ 290,879	$ 288,182