Accrued Expenses And Other Current Liabilities (Schedule Of Reconciliation Of The Activity Related To Accrued Warranty) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Payables and Accruals [Abstract]
Balance at beginning of period	$ 17,325	$ 12,729
Provision for warranty expense	6,439	7,432
Warranty liability from acquired businesses	608	21
Warranty costs paid	(4,216)	(4,497)
Total accrued warranty	20,156	15,685
Less long-term portion	6,608	4,930
Current accrued warranty	$ 13,548	$ 10,755	$ 11,731