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Product Warranty - Change in the Company's Warranty Accrual (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Movement in Standard Product Warranty Accrual [Roll Forward]    
Balance, beginning of period $ 11,643 $ 7,584
Change in liability for warranties issued in period 1,202 2,182
Settlements made (in cash or in kind) during the period (1,123) (1,316)
Balance, end of period $ 11,722 $ 8,450