Summary of Significant Accounting Policies (Accrued Expenses and Other Current Liabilities) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Summary of Significant Accounting Policies
Compensation related liabilities			$ 19,566	$ 18,717
Contingent consideration				8,602
Product warranty and recall obligations			7,685	7,211
Other			27,972	23,350
Total accrued expenses and other current liabilities			$ 55,223	$ 57,880
Contingent consideration	$ 8,474	$ 8,474