Comprehensive Income (Loss) - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012
Comprehensive Income (Loss) [Line Items]
Accumulated foreign currency translation adjustment	$ (14.4)

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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+ Details