Revenue Recognition - (Additional Information) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 762,137	$ 660,462	$ 1,542,367	$ 1,331,392
Remaining performance obligation	65,975		65,975
Contract with customer, liability, current portion	16,543		16,543		$ 15,162
Contract with customer, liability, noncurrent portion	6,808		6,808		6,360
Deferred Revenue, Revenue Recognized	3,690	611	8,157	2,597
Unbilled contracts receivable	46,319		46,319		$ 38,778
Right to recover product	2,667		2,667
Refund liability	5,213		5,213
Transferred over Time
Disaggregation of Revenue [Line Items]
Net sales	33,595	16,491	75,090	34,895
Service
Disaggregation of Revenue [Line Items]
Net sales	$ 61,282	$ 37,105	$ 122,000	$ 69,200

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

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