Assets Measured at Fair Value on Nonrecurring Basis (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
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of long-lived assets	$ (122)		$ (38)		$ (271)		$ (764)
Americas [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of long-lived assets	(100)		(100)		(100)		(100)
Americas [Member] | Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 [Member] | Continuing Operations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of long-lived assets	$ (122)	[1]	$ (38)	[1]	$ (271)	[1]	$ (764)	[1]

[1] See Note 1 for additional information regarding the fair value measurement.