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Components of Equity and Comprehensive Income (Parenthetical) (Detail) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Disclosure Components of Equity and Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax	$ 3,014	$ 7,970	$ 7,855	$ 9,681

Tax effect of the adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into functional currency of the reporting entity. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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