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Warranty - Analysis of Changes in the Liability (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2018
Oct. 01, 2017
Sep. 30, 2018
Oct. 01, 2017
Product Warranties Disclosures [Abstract]        
Balance at beginning of period $ 49,689 $ 46,677 $ 50,602 $ 46,116
Current period provisions 6,181 3,717 11,017 6,808
Costs incurred (7,920) (3,841) (12,301) (7,037)
Foreign currency translation adjustment (217) 560 (1,585) 1,226
Balance at end of period $ 47,733 $ 47,113 $ 47,733 $ 47,113