Segment Information (Schedule of Segment Revenue from Product Lines) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 23, 2017	Sep. 24, 2016	Sep. 23, 2017	Sep. 24, 2016
Segment Reporting Information [Line Items]
Net sales	$ 425,537	$ 428,619	$ 746,272	$ 688,047
Portable Audio Products
Segment Reporting Information [Line Items]
Net sales	381,761	383,410	662,449	599,478
Non-Portable Audio and Other Products
Segment Reporting Information [Line Items]
Net sales	$ 43,776	$ 45,209	$ 83,823	$ 88,569