<ARTICLE> 5

                                                  
<PERIOD-TYPE>                   6-MOS                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-2000             DEC-31-1999
<PERIOD-START>                             JAN-01-2000             JAN-01-1999
<PERIOD-END>                               JUN-30-2000             JUN-30-1999
<CASH>                                           7,725                   4,028
<SECURITIES>                                         0                       0
<RECEIVABLES>                                  110,100                  78,641
<ALLOWANCES>                                         0                       0
<INVENTORY>                                      7,494                   7,905
<CURRENT-ASSETS>                               141,518                 103,655
<PP&E>                                          68,765                  54,756
<DEPRECIATION>                                       0                       0
<TOTAL-ASSETS>                                 402,372                 329,119
<CURRENT-LIABILITIES>                           20,789                  21,753
<BONDS>                                              0                       0
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           484                     480
<OTHER-SE>                                     156,061                 153,714
<TOTAL-LIABILITY-AND-EQUITY>                   402,372                 329,119
<SALES>                                              0                       0
<TOTAL-REVENUES>                               137,532                 104,449
<CGS>                                                0                       0
<TOTAL-COSTS>                                        0                       0
<OTHER-EXPENSES>                                88,862                  68,860
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                             (1,607)                   (762)
<INCOME-PRETAX>                                 47,063                  34,827
<INCOME-TAX>                                    17,766                  13,147
<INCOME-CONTINUING>                             29,297                  21,680
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                   (678)
<NET-INCOME>                                    29,297                  21,002
<EPS-BASIC>                                       0.61                    0.44
<EPS-DILUTED>                                     0.60                    0.43