Quarterly report pursuant to Section 13 or 15(d)

Product Warranty (Reconciliation Of Product Warranties) (Details)

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Product Warranty (Reconciliation Of Product Warranties) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Movement in Standard Product Warranty Accrual [Roll Forward]        
Balance at beginning of period $ 9,833 $ 9,982 $ 10,452 $ 10,256
Charged to costs and expenses 786 814 1,965 2,685
Claims settled (1,068) (1,080) (2,957) (3,370)
Other (98) 61 (7) 206
Balance at end of period $ 9,453 $ 9,777 $ 9,453 $ 9,777