Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017	Mar. 31, 2018
Revenue from External Customer [Line Items]
Revenue	$ 660,462	$ 617,289	$ 1,331,392	$ 1,239,914
Typical payment terms			30 days
Current contract liability	9,518		$ 9,518		$ 9,387
Noncurrent contract liability	7,009		7,009		7,094
Unbilled contracts receivable	22,805		22,805		$ 24,810
Revenue recognized	661		2,597
Right of return asset related to value of inventory	2,647		2,647
Refund liability	5,013		5,013
Cost of goods sold	499,582	457,041	1,004,652	916,208
Other (income) expense, net	(1,325)	2,756	(997)	6,028
ASU No. 2017-07
Revenue from External Customer [Line Items]
Cost of goods sold	(284)	(374)	(607)	(735)
Other (income) expense, net	284	$ 374	607	$ 735
Transferred over Time
Revenue from External Customer [Line Items]
Revenue	16,491		34,895
Service Revenue
Revenue from External Customer [Line Items]
Revenue	$ 37,105		$ 69,200

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