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Goodwill and Intangible Assets (Details 1) - USD ($)
$ in Thousands
3 Months Ended
Jul. 01, 2017
Apr. 01, 2017
Gross Carrying Amount $ 193,346 $ 192,792
Accumulated Amortization 32,562 30,191
Non-amortizable repair station certifications 34,200 34,200
Total $ 227,546 226,992
Product Approvals [Member]    
Weighted Average Useful Lives 24 years  
Gross Carrying Amount $ 53,952 53,869
Accumulated Amortization $ 7,031 6,465
Customer Relationships and Lists [Member]    
Weighted Average Useful Lives 24 years  
Gross Carrying Amount $ 107,899 107,864
Accumulated Amortization $ 13,397 12,308
Trade Names [Member]    
Weighted Average Useful Lives 10 years  
Gross Carrying Amount $ 19,956 19,923
Accumulated Amortization $ 5,639 5,137
Distributor Agreements [Member]    
Weighted Average Useful Lives 5 years  
Gross Carrying Amount $ 722 722
Accumulated Amortization $ 722 722
Patents And Trademarks [Member]    
Weighted Average Useful Lives 15 years  
Gross Carrying Amount $ 9,191 8,803
Accumulated Amortization $ 4,296 4,130
Domain Names [Member]    
Weighted Average Useful Lives 10 years  
Gross Carrying Amount $ 437 437
Accumulated Amortization $ 397 386
Other Intangible Assets [Member]    
Weighted Average Useful Lives 5 years  
Gross Carrying Amount $ 1,189 1,174
Accumulated Amortization $ 1,080 $ 1,043