Accrued Expenses And Other Current Liabilities (Schedule of Accrued Expenses and Other Current Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Employee compensation and benefits	$ 33,835	$ 39,365
Current portion of accrued warranty	32,180	23,055	$ 20,393
Customer rebates	6,193	11,124
Other	27,020	29,305
Accrued expenses and other current liabilities	$ 99,228	$ 102,849