<ARTICLE> 5
<LEGEND>
This schedule contains summary consolidated financial information extracted from
the Company's Form 10-Q/A for the three-month period ended March 31, 2000 and is
qualified in its entirety by reference to such Form 10-Q/A.
</LEGEND>

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                      27,531,677
<SECURITIES>                                         0
<RECEIVABLES>                              148,403,549
<ALLOWANCES>                                 2,651,770
<INVENTORY>                                          0
<CURRENT-ASSETS>                           209,512,151
<PP&E>                                     258,130,119
<DEPRECIATION>                             111,760,093
<TOTAL-ASSETS>                             449,949,196
<CURRENT-LIABILITIES>                      100,869,420
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       430,091
<OTHER-SE>                                 183,682,295
<TOTAL-LIABILITY-AND-EQUITY>               449,949,196
<SALES>                                    161,311,916
<TOTAL-REVENUES>                           161,311,916
<CGS>                                                0
<TOTAL-COSTS>                              102,211,246
<OTHER-EXPENSES>                            46,915,076
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                           1,235,732
<INCOME-PRETAX>                             10,948,962
<INCOME-TAX>                                 4,248,000
<INCOME-CONTINUING>                          6,700,962
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 6,700,962
<EPS-BASIC>                                       0.16
<EPS-DILUTED>                                     0.16