Segment Information (Schedule of Segment Revenue from Product Lines) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Segment Reporting Information [Line Items]
Net sales	$ 210,214	$ 190,671	$ 362,779	$ 345,796
Portable Audio Products [Member]
Segment Reporting Information [Line Items]
Net sales	163,563	150,949	276,132	267,556
Non-Portable Audio and Other Products [Member]
Segment Reporting Information [Line Items]
Net sales	$ 46,651	$ 39,722	$ 86,647	$ 78,240

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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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