Segment Information (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Jun. 29, 2012	Jul. 01, 2011
Revenue information by geographic area
Revenue information by geographic area - United States	$ 178,734	$ 154,201
Total revenues	241,763	195,101
Europe, Middle East and Africa [Member]
Revenue information by geographic area
Revenue information by geographic area	32,215	26,904
Asia, Pacific [Member]
Revenue information by geographic area
Revenue information by geographic area	8,431	7,178
North America other than United States [Member]
Revenue information by geographic area
Revenue information by geographic area	17,387	4,224
Central and Latin America [Member]
Revenue information by geographic area
Revenue information by geographic area	$ 4,996	$ 2,594

Revenues from external customers attributed to all foreign countries in total from which the entity derives revenues.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 38

-Subparagraph a(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 41

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

Name:	us-gaap_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration