Accrued Expenses And Other Current Liabilities (Schedule Of Reconciliation Of The Activity Related To Accrued Warranty) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Payables and Accruals [Abstract]
Balance at beginning of period	$ 17,325	$ 12,729
Provision for warranty expense	9,329	11,010
Warranty liability from acquired businesses	688	21
Warranty costs paid	(6,441)	(6,974)
Total accrued warranty	20,901	16,786
Less long-term portion	6,831	5,435
Current portion of accrued warranty	$ 14,070	$ 11,351	$ 11,731