Segment Information (Schedule of Segment Revenue from Product Lines) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 28, 2015	Mar. 29, 2014	Mar. 30, 2013
Segment Reporting Information [Line Items]
Net sales	$ 255,183	$ 298,606	$ 210,214	$ 152,565	$ 149,659	$ 218,883	$ 190,671	$ 155,125	$ 916,568	$ 714,338	$ 809,786
Portable Audio Products [Member]
Segment Reporting Information [Line Items]
Net sales									740,301	562,718	651,974
Non-Portable Audio and Other Products [Member]
Segment Reporting Information [Line Items]
Net sales									$ 176,267	$ 151,620	$ 157,812