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 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Reconciliation of Product Warranty Accrual [Roll Forward]        
Balance at beginning of period $ 9,665 $ 9,453 $ 10,209 $ 10,452
Charged to costs and expenses 1,154 1,218 3,938 3,183
Claims settled (806) (960) (3,976) (3,917)
Other 126 83 (32) 76
Balance at end of period $ 10,139 $ 9,794 $ 10,139 $ 9,794