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Warranties (Activity for Estimated Warranty Liability) (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 29, 2019
Jun. 30, 2018
Accrual for estimated warranties    
Balance at beginning of period $ 17,069 $ 16,638
Charged to costs and expenses 7,821 6,229
Payments and deductions (7,130) (6,197)
Balance at end of period $ 17,760 $ 16,670