Annual report pursuant to Section 13 and 15(d)

Receivables and Allowance for Doubtful Receivables (Tables)

v2.4.0.6
Receivables and Allowance for Doubtful Receivables (Tables)
 12 Months Ended
Dec. 31, 2012
Receivables and Allowance for Doubtful Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
      2012   2011
  Trade $ 148,902   140,533
  Employee   703   720
  Other   831   574
  Total Receivables $ 150,436   141,827
Allowance For Doubtful Accounts Receivable Rollforward [Table Text Block]
          Additions   Deductions    
  Description   Balance at beginning of year   Charged to costs and expenses   Charged to other accounts   Write-offs net of recoveries   Balance at end of year
  December 31, 2012 $ 5,796   3,649   (2,261)   3,969   3,215
  December 31, 2011 $ 9,189   4,294   (29)   7,658   5,796
  December 31, 2010 $ 7,060   3,085   1,670   2,626   9,189