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Warranties (Activity for Estimated Warranty Liability) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Sep. 29, 2018
Sep. 30, 2017
Product Warranties Disclosures [Abstract]        
Product Warranty Accrual, Additions from Business Acquisition $ 0 $ 0 $ 0 $ 838
Accrual for estimated warranties        
Balance at beginning of period 16,670 16,316 16,638 15,479
Charged to costs and expenses 6,713 7,399 12,942 12,622
Payments and deductions (6,478) (7,245) (12,675) (12,469)
Balance at end of period $ 16,905 $ 16,470 $ 16,905 $ 16,470