Accrued Expenses And Other Current Liabilities (Schedule Of Accrued Expenses And Other Current Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Payables and Accruals [Abstract]
Employee compensation and benefits	$ 31,479	$ 45,612
Current portion of accrued warranty	28,643	29,898	$ 34,862
Customer rebates	14,133	14,129
Other	46,302	42,781
Accrued expenses and other current liabilities	$ 120,557	$ 132,420