Segment Information (Schedule of Segment Revenue from Product Lines) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2018	Dec. 30, 2017	Sep. 23, 2017	Jun. 24, 2017	Mar. 25, 2017	Dec. 24, 2016	Sep. 24, 2016	Jun. 25, 2016	Mar. 31, 2018	Mar. 25, 2017	Mar. 26, 2016
Segment Reporting Information [Line Items]
Net sales	$ 303,173	$ 482,741	$ 425,537	$ 320,735	$ 327,864	$ 523,029	$ 428,619	$ 259,428	$ 1,532,186	$ 1,538,940	$ 1,169,251
Portable Audio Products
Segment Reporting Information [Line Items]
Net sales									1,363,876	1,373,848	989,101
Non-Portable Audio and Other Products
Segment Reporting Information [Line Items]
Net sales									$ 168,310	$ 165,092	$ 180,150