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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Allowances for Accounts Receivable (in dollars) $ 8,943 $ 11,066
Common stock par value $ 0.0001  
Common stock, shares authorized 245,000,000  
Common stock, shares issued 133,247,000 132,754,000
Common stock, shares outstanding 82,616,000 83,520,000
Treasury stock-shares at cost 50,631,000 49,234,000
Preferred Class A [Member]    
Preferred stock-par value $ 0.0001  
Preferred stock- shares authorized 5,000,000  
Preferred Class B [Member]    
Preferred stock-par value $ 0.0001  
Preferred stock- shares authorized 60,000