Accrued Expenses And Other Current Liabilities (Schedule Of Reconciliation Of The Activity Related To Accrued Warranty) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Payables and Accruals [Abstract]
Balance at beginning of period	$ 17,325	$ 12,729
Provision for warranty expense	2,402	3,499
Warranty liability from acquired businesses	75	0
Warranty costs paid	(1,945)	(2,284)
Total accrued warranty	17,857	13,944
Less long-term portion	5,839	4,142
Current accrued warranty	$ 12,018	$ 9,802	$ 11,731