Accrued Expenses And Other Current Liabilities (Schedule Of Accrued Expenses And Other Current Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Payables and Accruals [Abstract]
Employee compensation and benefits	$ 31,202	$ 47,459	$ 30,900
Current portion of accrued warranty	20,397	20,393	18,185
Taxes payable	14,624	41	17,508
Customer rebates	10,440	9,329	9,735
Other	24,357	21,513	23,326
Accrued expenses and other current liabilities	$ 101,020	$ 98,735	$ 99,654