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Product Warranties (Tables)
 3 Months Ended
Mar. 31, 2013
Product Warranties Disclosures [Abstract]  
Current and Long-term Recorded Warranty Liability
Changes in the Company's current and long-term recorded warranty liability are as follows (in thousands):
 
2013
Balance at January 1
$
4,269

Current year warranty expense
1,760

Payments made
(2,232
)
Balance as of March 31
$
3,797