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Note F - Business Combinations (Tables)
 12 Months Ended
Dec. 31, 2013
Business Combinations [Abstract]  
Business Acquisition, Pro Forma Information [Table Text Block]
 (in thousands except per share amounts)  

(Unaudited)

2011

   

Revenue

  $ 898,528    

Operating income

    63,061    

Net income

    36,309    

Earnings per share:

         

Basic earnings per share

  $ 1.84    

Diluted earnings per share

  $ 1.82