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Product Warranties (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Product Warranties [Abstract]      
Standard Product Warranty Accrual Beginning $ 44,486 $ 13,181 $ 12,101
Standard Product Warranty Accrual, Warranties Issued 17,486 12,494 7,420
Standard Product Warranty Accrual, Payments (28,359) (18,222) (8,085)
Product Warranty Accrual, Additions from Business Acquisition 214 37,033 1,745
Standard Product Warranty Accrual ending $ 33,827 $ 44,486 $ 13,181