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, 2013	Mar. 31, 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	3,499	3,054
Warranty costs paid	(2,284)	(1,957)
Total accrued warranty	13,944	9,737
Less long-term portion	4,142	2,957
Current accrued warranty	$ 9,802	$ 6,780

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers.

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