Omni Guide (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 29, 2014	Sep. 28, 2013	Mar. 28, 2015	Mar. 29, 2014	Mar. 30, 2013
Schedule of Cost-method Investments [Line Items]
Other than temporary impairment of cost based investments	$ (6,100)	$ (3,600)	$ 4,263	$ 9,703	$ 0
Omni Guide, Inc.
Schedule of Cost-method Investments [Line Items]
Minority equity investment	$ 4,263		$ 0	$ 4,263

Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 325

-SubTopic 20

-Section 35

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=29638308&loc=d3e40346-111594

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