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Accrued Liabilities (Schedule Of Accrued Liabilities) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Dec. 31, 2009
Accrued Liabilities
Warranty	$ 18,573	$ 19,198	$ 18,728
Total	$ 221,972	$ 229,462

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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