Accrued Expenses And Other Current Liabilities (Schedule Of Accrued Expenses And Other Current Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Payables and Accruals [Abstract]
Employee compensation and benefits	$ 50,222	$ 45,612
Current portion of accrued warranty	28,328	29,898	$ 36,760
Customer rebates	14,604	14,129
Other	47,785	42,781
Accrued expenses and other current liabilities	$ 140,939	$ 132,420