<ARTICLE>                     5
<MULTIPLIER>                  1000
<RESTATED>
       
                                   
<PERIOD-TYPE>                      12-MOS
<FISCAL-YEAR-END>                                                    DEC-31-1998
<PERIOD-END>                                                         DEC-31-1996
<CASH>                                                                     5,557
<SECURITIES>                                                                   0
<RECEIVABLES>                                                             48,546
<ALLOWANCES>                                                               3,773
<INVENTORY>                                                                    0
<CURRENT-ASSETS>                                                          55,475
<PP&E>                                                                   125,727
<DEPRECIATION>                                                            85,506
<TOTAL-ASSETS>                                                           170,331
<CURRENT-LIABILITIES>                                                     33,338
<BONDS>                                                                        0
<PREFERRED-MANDATORY>                                                          0
<PREFERRED>                                                                    0
<COMMON>                                                                       0
<OTHER-SE>                                                                99,353
<TOTAL-LIABILITY-AND-EQUITY>                                             170,331
<SALES>                                                                        0
<TOTAL-REVENUES>                                                         319,404
<CGS>                                                                          0
<TOTAL-COSTS>                                                            237,443
<OTHER-EXPENSES>                                                               0
<LOSS-PROVISION>                                                               0
<INTEREST-EXPENSE>                                                             0
<INCOME-PRETAX>                                                           81,961
<INCOME-TAX>                                                              34,356
<INCOME-CONTINUING>                                                       47,605
<DISCONTINUED>                                                                 0
<EXTRAORDINARY>                                                                0
<CHANGES>                                                                      0
<NET-INCOME>                                                              47,605
<EPS-PRIMARY>                                                               0.84
<EPS-DILUTED>                                                               0.84