Segment Information (Details 3) (USD $) In Thousands	3 Months Ended
Jul. 01, 2011	Jul. 02, 2010
Revenue information by geographic area
Revenue information by United States	$ 154,201	$ 161,165
Total revenue information by geographic area	195,101	192,004
Europe, Middle East and Africa [Member]
Revenue information by geographic area
Revenue information by geographic area	26,904	20,614
Asia, Pacific [Member]
Revenue information by geographic area
Revenue information by geographic area	7,178	6,833
North America other than United States [Member]
Revenue information by geographic area
Revenue information by geographic area	4,224	1,322
Latin America [Member]
Revenue information by geographic area
Revenue information by geographic area	$ 2,594	$ 2,070

Revenues from external customers attributed to the entity's country of domicile.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-Paragraph 38
-Subparagraph a(1)

+ Details

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Namespace Prefix:	us-gaap
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- Definition

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

+ References

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)

+ Details

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 1
-Article 5

+ Details

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