Accrued Expenses And Other Current Liabilities (Schedule Of Reconciliation Of The Activity Related To Accrued Warranty) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at beginning of period	$ 21,641	$ 17,325
Provision for warranty expense	8,367	6,439
Warranty liability from acquired businesses	165	608
Warranty costs paid	(5,789)	(4,216)
Balance at end of period	24,384	20,156
Less long-term portion	8,399	6,608
Current portion of accrued warranty	$ 15,985	$ 13,548	$ 14,516