Accrued Expenses And Other Current Liabilities (Schedule Of Accrued Expenses And Other Current Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Payables and Accruals [Abstract]
Employee compensation and benefits	$ 30,900	$ 25,147	$ 23,727
Current portion of accrued warranty	18,185	17,020	15,284
Taxes payable	17,508	0	5,610
Sales rebates	9,735	7,993	7,016
Other	23,326	19,002	17,862
Accrued expenses and other current liabilities	$ 99,654	$ 69,162	$ 69,499