Segment Information (Schedule of Segment Revenue from Product Lines) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 25, 2017	Dec. 24, 2016	Sep. 24, 2016	Jun. 25, 2016	Mar. 26, 2016	Dec. 26, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 25, 2017	Mar. 26, 2016	Mar. 28, 2015
Segment Reporting Information [Line Items]
Net sales	$ 327,864	$ 523,029	$ 428,619	$ 259,428	$ 231,999	$ 347,863	$ 306,756	$ 282,633	$ 1,538,940	$ 1,169,251	$ 916,568
Audio Products [Member]
Segment Reporting Information [Line Items]
Net sales									1,373,848	989,101	740,301
Non-Portable Audio and Other Products [Member]
Segment Reporting Information [Line Items]
Net sales									$ 165,092	$ 180,150	$ 176,267