<TABLE> <S> <C>


<ARTICLE> 5
<RESTATED> 
       
<S>                            <C>                        <C>                        <C>
<PERIOD-TYPE>                  3-MOS                      6-MOS                      9-MOS
<FISCAL-YEAR-END>                         DEC-31-1998                DEC-31-1998                DEC-31-1998
<PERIOD-START>                            JAN-01-1998                JAN-01-1998                JAN-01-1998
<PERIOD-END>                              MAR-31-1998                JUN-30-1998                SEP-30-1998
<CASH>                                         10,686                      7,510                     11,135
<SECURITIES>                                        0                          0                          0
<RECEIVABLES>                                  42,110                     44,862                     51,189
<ALLOWANCES>                                  (3,525)                    (4,046)                    (4,128)
<INVENTORY>                                     1,399                      1,363                      1,370
<CURRENT-ASSETS>                               57,279                     56,504                     66,956
<PP&E>                                         47,121                     51,280                     53,959
<DEPRECIATION>                               (21,994)                   (22,956)                   (24,444)
<TOTAL-ASSETS>                                173,149                    178,502                    192,279
<CURRENT-LIABILITIES>                          31,669                     27,155                     32,506
<BONDS>                                        19,440                     23,319                     25,375
<PREFERRED-MANDATORY>                               0                          0                          0
<PREFERRED>                                         0                          0                          0
<COMMON>                                          133                        134                        135
<OTHER-SE>                                    120,274                    126,916                    133,226
<TOTAL-LIABILITY-AND-EQUITY>                  173,149                    178,502                    192,279
<SALES>                                         1,766                      3,550                      5,471
<TOTAL-REVENUES>                               56,766                    118,073                    181,571
<CGS>                                           1,341                      2,657                      4,128
<TOTAL-COSTS>                                  48,179                     99,611                    152,482
<OTHER-EXPENSES>                                 (65)                      (174)                      (306)
<LOSS-PROVISION>                                  186                        653                      1,093
<INTEREST-EXPENSE>                                197                        563                        986
<INCOME-PRETAX>                                 6,487                     13,952                     21,982
<INCOME-TAX>                                    2,392                      4,989                      7,772
<INCOME-CONTINUING>                             4,095                      8,963                     14,210
<DISCONTINUED>                                      0                          0                          0
<EXTRAORDINARY>                                     0                          0                          0
<CHANGES>                                           0                          0                          0
<NET-INCOME>                                    4,095                      8,963                     14,210
<EPS-PRIMARY>                                    0.31                       0.67                       1.06
<EPS-DILUTED>                                    0.30                       0.66                       1.04
        

</TABLE>