Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Data (Tables)

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Selected Quarterly Financial Data (Tables)
12 Months Ended
Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]  
Schedule of Quarterly Financial Data
    Three Months Ended  
    Dec. 31     Sep. 30     Jun. 30     Mar. 31     Dec. 31     Sep. 30     Jun. 30     Mar. 31  
    2018     2018     2018     2018     2017     2017     2017     2017  
Consolidated Financial
Statement Data:
  (in thousands, except per share data)  

Total revenues

  $ 230,283     $ 210,590     $ 199,402     $ 174,541     $ 202,776     $ 183,341     $ 180,371     $ 153,212  

Cost of services

    148,469       132,896       119,869       101,649       131,730       114,803       110,377       89,647  

Operating income

    32,489       27,384       28,950       23,464       27,403       24,683       24,998       19,048  

Net income

    26,225       20,854       22,167       18,011       8,480       15,475       15,569       12,000  

Earnings per share:

               

Basic

  $ 0.67     $ 0.53     $ 0.57     $ 0.46     $ 0.22     $ 0.40     $ 0.40     $ 0.31  

Diluted

  $ 0.66     $ 0.53     $ 0.56     $ 0.46     $ 0.22     $ 0.39     $ 0.40     $ 0.31