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, 2015
Quarterly Financial Information Disclosure [Abstract]  
Schedule of unaudited quarterly data
(in thousands except per share data)   First   Second   Third   Fourth
2015                                
Revenues   $ 330,909     $ 392,150     $ 399,746     $ 362,500  
Gross profit (Revenues less cost of services provided)   $ 162,866     $ 201,941     $ 204,257     $ 180,265  
Net income   $ 30,281     $ 45,073     $ 45,046     $ 31,749  
Income per share:                                
Income per share—Basic   $ 0.14     $ 0.21     $ 0.21     $ 0.15  
Income per share—Diluted   $ 0.14     $ 0.21     $ 0.21     $ 0.15  
                                 
2014                                
Revenues   $ 313,388     $ 369,357     $ 384,870     $ 343,951  
Gross profit (Revenues less cost of services provided)   $ 152,080     $ 186,715     $ 196,060     $ 168,972  
Net income   $ 25,766     $ 40,860     $ 41,121     $ 29,917  
Income per share:                                
Income per share—Basic   $ 0.12     $ 0.19     $ 0.19     $ 0.14  
Income per share—Diluted   $ 0.12     $ 0.19     $ 0.19     $ 0.14