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
Mar. 31, 2014
Dec. 31, 2013
Trade accounts receivable, allowances $ 20,513 $ 15,926
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 39,699 39,688
Common Stock, shares outstanding 39,699 39,688
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 10,859 10,870
Common Stock, shares outstanding 10,859 10,870