Annual report pursuant to Section 13 and 15(d)

UNAUDITED QUARTERLY DATA (Tables)

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UNAUDITED QUARTERLY DATA (Tables)
 12 Months Ended
Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]  
Schedule of unaudited quarterly data
in thousands except per share data)   First   Second   Third   Fourth
2013                                
Revenues   $ 299,714     $ 350,798     $ 362,155     $ 324,707  
Gross profit (Revenues less cost of services provided)   $ 144,108     $ 176,437     $ 181,020     $ 157,350  
Net income   $ 23,179     $ 35,994     $ 36,200     $ 27,957  
Income per share:                                
Income per share—Basic   $ 0.16     $ 0.25     $ 0.25     $ 0.19  
Income per share—Diluted   $ 0.16     $ 0.25     $ 0.25     $ 0.19  
                                 
2012                                
Revenues   $ 289,465     $ 334,872     $ 340,179     $ 306,393  
Gross profit (Revenues less cost of services provided)   $ 141,383     $ 168,879     $ 169,701     $ 143,368  
Net income   $ 23,080     $ 33,127     $ 32,211     $ 22,914  
Income per share:                                
Income per share—Basic   $ 0.16     $ 0.23     $ 0.22     $ 0.16  
Income per share—Diluted   $ 0.16     $ 0.23     $ 0.22     $ 0.16