v2.4.0.6

Charges Related to Refinancing (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2011	Mar. 31, 2010
Components of Other Income (Expense) [Line Items]
Charges related to refinancing	$ 8,155	$ 8,155

X

- Definition

Charges related to refinancing.

+ References

No definition available.

+ Details

Name:	ens_ChargesRelatedToRefinancing
Namespace Prefix:	ens_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	ens_ComponentsOfOtherIncomeExpenseLineItems
Namespace Prefix:	ens_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration