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Valuation and Qualifying Accounts (Schedule of Valuation and Qualifying Accounts) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Allowance for doubtful accounts
      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance Beginning of Year $ 3,215 $ 2,852 $ 2,548
Net Charged to Costs and Expenses 253 995 1,112
Translations, Reclassifications and Acquisitions 113 (65) (81)
Net Write-Offs or Discounts Taken (504) (567) (727)
Balance End of Year 3,077 3,215 2,852
Reserve for sales discounts
      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance Beginning of Year 14,567 11,903 3,803
Net Charged to Costs and Expenses 65,481 62,935 51,813
Translations, Reclassifications and Acquisitions (16) 9 (2)
Net Write-Offs or Discounts Taken (65,027) (60,280) (43,711)
Balance End of Year 15,005 14,567 11,903
Reserve for inventory obsolescence
      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance Beginning of Year 7,630 7,506 9,060
Net Charged to Costs and Expenses 2,998 3,403 2,811
Translations, Reclassifications and Acquisitions 79 (123) (230)
Net Write-Offs or Discounts Taken (1,608) (3,156) (4,135)
Balance End of Year 9,099 7,630 7,506
Reserve for warranty
      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance Beginning of Year 5,083 5,554 5,972
Net Charged to Costs and Expenses 6,646 6,070 7,225
Translations, Reclassifications and Acquisitions 82 17 (173)
Net Write-Offs or Discounts Taken (6,804) (6,558) (7,470)
Balance End of Year $ 5,007 $ 5,083 $ 5,554