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Employee Benefits Weighted Average Assumptions (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Period of projection (in years)	10 years
Discount rate	9.42%	10.10%
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.20%	5.50%	7.50%
Rate of increase in future compensation	4.00%	5.00%	5.00%
Expected long-term rate of return on plan assets	8.00%	8.00%	8.00%
Discount rate	4.30%	5.19%
Rate of increase in future compensation	4.00%	4.00%
Expected to be amortized from accumulated comprehensive income into net periodic benefit cost during fiscal 2013	$ (1,995)
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	6.21%	6.35%	6.69%
Rate of increase in future compensation	4.96%	5.02%	5.08%
Expected long-term rate of return on plan assets	6.94%	6.85%	6.40%
Discount rate	5.22%	6.10%
Rate of increase in future compensation	4.45%	4.96%
Expected to be amortized from accumulated comprehensive income into net periodic benefit cost during fiscal 2013	$ (220)

The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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