This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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This element represents the total of interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties in the period in which the entity claims or expects to claim a tax position, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
Income Taxes (Narrative) (Details) (USD $)	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Income Tax [Line Items]
Undistributed earnings of foreign subsidiaries			$ 52,000,000
Additional income tax expense			3,500,000
Unrecognized tax benefits that would impact effective tax rate	1,900,000
Liability where a significant change in unrecognized tax benefits is reasonably possible	2,300,000
Reduction in liability for uncertain tax positions	698,000	12,765,000	1,552,000
Net expense for interest and penalties	400,000	200,000	2,600,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	4,500,000	5,800,000
Tax Paid [Member]
Income Tax [Line Items]
Reduction in liability for uncertain tax positions		5,700,000
Income Tax Expense [Member]
Income Tax [Line Items]
Reduction in liability for uncertain tax positions		$ 7,100,000
U.S. Federal [Member]
Income Tax [Line Items]
Open tax years	3/31/2009
Minimum [Member] \| State And Foreign Jurisdictions [Member]
Income Tax [Line Items]
Open tax years	3
Maximum [Member] \| State And Foreign Jurisdictions [Member]
Income Tax [Line Items]
Open tax years	6