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Changes in Carrying Amounts of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Goodwill And Intangible Assets [Line Items]
Additional acquisitions recorded	$ 9,093
Currency translation adjustment	(107)
Balance - End of the year	$ 8,986

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

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