Fair Value Of Acquired Identifiable Intangible Assets And Related Estimates Useful Lives (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Sep. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets, useful life	10 years 6 months
Accanto Systems Srl
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets	5,280
Intangible Assets, useful life	7 years 3 months 18 days
Accanto Systems Srl \| Software
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets	3,500
Intangible Assets, useful life	8 years
Accanto Systems Srl \| Distributor Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible Assets	1,780
Intangible Assets, useful life	6 years

The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph e

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 52

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant