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Summary of Significant Accounting Policies - Schedule of Changes in Warranty and After-Sale Costs Reserve (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Warranty and After-Sale Costs      
Balance at beginning of year $ 5,583 $ 4,206 $ 3,367
Provision of acquired business 500    
Net additions charged to earnings 7,855 6,616 3,274
Costs incurred (2,321) (5,239) (2,435)
Balance at end of year $ 11,617 $ 5,583 $ 4,206