Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v2.4.0.8
Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Trade accounts receivable, allowances $ 17,683 $ 16,922
Preferred Stock, par value $ 0.001 $ 0.001
Preferred Stock, shares authorized 10,000 10,000
Preferred Stock, shares issued      
Preferred Stock, shares outstanding      
Class A Common Stock [Member]
   
Common Stock, par value $ 0.001 $ 0.001
Common Stock, shares authorized 100,000 100,000
Common Stock, shares issued 39,233 39,021
Common Stock, shares outstanding 39,233 39,021
Class B Common Stock [Member]
   
Common Stock, par value $ 0.001 $ 0.001
Common Stock, shares authorized 60,000 60,000
Common Stock, shares issued 11,170 11,274
Common Stock, shares outstanding 11,170 11,274