<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   9-MOS                   6-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                              JAN-1-1997              JAN-1-1997              JAN-1-1997
<PERIOD-END>                               SEP-30-1997             JUN-30-1997             MAR-31-1997
<CASH>                                           8,296                   8,803                  14,076
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                   28,491                  25,715                  22,960
<ALLOWANCES>                                     2,174                   1,406                   1,559
<INVENTORY>                                      1,464                   1,444                   1,161
<CURRENT-ASSETS>                                40,692                  37,516                  39,640
<PP&E>                                          34,347                  28,771                  26,534
<DEPRECIATION>                                  16,667                  13,674                  12,330
<TOTAL-ASSETS>                                 115,727                 107,124                 105,010
<CURRENT-LIABILITIES>                           17,237                  15,328                  18,882
<BONDS>                                          5,451                   5,344                   6,183
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                           103                     101                      99
<OTHER-SE>                                      93,135                  86,571                  80,693
<TOTAL-LIABILITY-AND-EQUITY>                   115,727                 107,124                 105,010
<SALES>                                          5,878                   3,590                   1,765
<TOTAL-REVENUES>                               109,893                  69,384                  33,488
<CGS>                                            4,527                   2,773                   1,351
<TOTAL-COSTS>                                   95,039                  59,434                  28,838
<OTHER-EXPENSES>                                 (386)                   (375)                   (217)
<LOSS-PROVISION>                                   387                      99                       3
<INTEREST-EXPENSE>                                 535                     380                     197
<INCOME-PRETAX>                                 11,181                   7,677                   3,577
<INCOME-TAX>                                     4,536                   3,134                   1,414
<INCOME-CONTINUING>                              6,645                   4,543                   2,163
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     6,645                   4,543                   2,163
<EPS-PRIMARY>                                     0.70                    0.45                    0.21
<EPS-DILUTED>                                     0.69                    0.44                    0.21
        

</TABLE>