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Summary of Significant Accounting Policies (Accrued Expenses and Other Current Liabilities) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Summary of Significant Accounting Policies      
Compensation related liabilities   $ 21,852 $ 19,566
Product warranty and recall obligations   9,044 7,685
Other   21,376 27,972
Total accrued expenses and other current liabilities   $ 52,272 $ 55,223
Contingent consideration $ 8,474