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, 2013	Sep. 30, 2012
Accrued Expenses And Other Current Liabilities [Abstract]
Balance at beginning of period - current	$ 9,125	$ 5,882
Balance at beginning of period - long-term	3,604	2,758
Balance at beginning of period - total	12,729	8,640
Provision for warranty expense	11,010	8,548
Warranty liability from acquired businesses	21	12
Warranty costs paid	(6,974)	(5,813)
Total accrued warranty	16,786	11,387
Less long-term portion	5,435	3,374
Current accrued warranty	$ 11,351	$ 8,013