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Note 8- Product Warranty Obligations (Details) - Deferred Product Obligations - USD ($)
$ in Thousands
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Product warranty liability            
Current portion - other accrued liabilities $ 21,801   $ 24,143      
Long-term portion - other long-term liabilities 6,384   6,766      
Total 28,185 $ 29,277 30,909 $ 32,171 $ 31,907 $ 33,734
Deferred revenue related to extended warranty            
Current portion - other accrued liabilities 4,567   4,519      
Long-term portion - other long-term liabilities 22,674   22,674      
Total $ 27,241 $ 27,531 $ 27,193 $ 25,679 $ 24,632 $ 23,092