Segment Information (Schedule of Segment Revenue from Product Lines) (Details) - USD ($) $ in Thousands	3 Months Ended
Jun. 24, 2017	Jun. 25, 2016
Segment Reporting Information [Line Items]
Net sales	$ 320,735	$ 259,428
Portable Audio Products
Segment Reporting Information [Line Items]
Net sales	280,688	216,068
Non-Portable Audio and Other Products
Segment Reporting Information [Line Items]
Net sales	$ 40,047	$ 43,360

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=63488584&loc=d3e20235-122688

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