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Product Warranties (Notes)
 9 Months Ended
Sep. 30, 2013
Product Warranties [Abstract]  
Product Warranty Disclosure [Text Block]
Product Warranties
The Company provides product warranties with varying terms and durations for the majority of its products. The Company calculates its warranty reserve by considering historical warranty experience and specifically identified warranty issues. The Company records warranty expense in cost of sales. Product warranty claims not expected to occur within one year are recorded in the long-term portion of the warranty reserve in the condensed consolidated balance sheets. Actual experience could differ from the amounts estimated requiring adjustments to the liability in future periods. The changes in the Company’s consolidated warranty reserve are as follows:
Balance at December 31, 2012
$
44,486

Warranty expense
11,936

Warranty usage
(20,352
)
Balance at September 30, 2013
$
36,070