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Reserve for Product Warranties - Narrative (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Product Warranties Disclosures [Abstract]            
Product warranty period (in years) 1 year          
Product Liability Contingency [Line Items]            
Accrual of estimated costs $ 5,683 $ 5,837 $ 6,404 $ 8,076 $ 8,225 $ 9,391