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Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012 Year	Jun. 30, 2011	Mar. 31, 2012
Income Taxes [Line Items]
Net deferred tax liability	$ 4,890		$ 4,799
Amortization period of deferred tax liability (years)	15
Income tax provision	436	96
GERMANY
Income Taxes [Line Items]
Income tax provision	200
UNITED STATES
Income Taxes [Line Items]
Income tax provision	$ 200

Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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