Goodwill and Intangible Assets (Details 1) - USD ($) $ in Thousands	9 Months Ended
	Dec. 29, 2018	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Non-amortizable repair station certifications	$ 24,281	$ 34,200
Gross Carrying Amount	177,165	188,444
Gross amount	201,446	222,644
Accumulated Amortization	$ 43,765	38,880
Product Approvals [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	24 years
Gross Carrying Amount	$ 50,878	50,878
Accumulated Amortization	$ 9,950	8,351
Customer Relationships And Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	24 years
Gross Carrying Amount	$ 96,458	106,583
Accumulated Amortization	$ 18,188	16,499
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	10 years
Gross Carrying Amount	$ 15,959	18,734
Accumulated Amortization	$ 7,092	6,765
Distributor Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	5 years
Gross Carrying Amount	$ 722	722
Accumulated Amortization	$ 722	722
Patents And Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	16 years
Gross Carrying Amount	$ 10,350	9,657
Accumulated Amortization	$ 5,353	4,810
Domain names [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	10 years
Gross Carrying Amount	$ 437	437
Accumulated Amortization	$ 437	430
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives	6 years
Gross Carrying Amount	$ 2,361	1,433
Accumulated Amortization	$ 2,023	$ 1,303