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, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Reconciliation of Product Warranty Accrual [Roll Forward]        
Balance at beginning of period $ 9,683 $ 9,833 $ 10,209 $ 10,452
Charged to costs and expenses 1,269 786 2,784 1,965
Claims settled (1,236) (1,068) (3,170) (2,957)
Other (51) (98) (158) (7)
Balance at end of period $ 9,665 $ 9,453 $ 9,665 $ 9,453