Fair Value - Additional Information (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
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets	$ 122	$ 38	$ 271	$ 764
Americas [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets	100	100	100	100
Americas [Member] | Third Quarter 2010 Exit Plan [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets				700
Costa Rica [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets			$ 149
Number of closed customer contact management center			1