Accrued Expenses And Other Current Liabilities (Schedule Of Accrued Expenses And Other Current Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Payables and Accruals [Abstract]
Employee compensation and benefits	$ 95,870	$ 62,555
Deferred acquisition payments and contingent consideration	53,637	16,627
Current portion of accrued warranty	30,436	32,451	$ 29,722
Customer rebates	7,206	23,670
Other	96,573	52,897
Accrued expenses and other current liabilities	$ 283,722	$ 188,200