<ARTICLE> 5
<RESTATED> 
<MULTIPLIER> 1,000
       
                                                                       
<PERIOD-TYPE>                   6-MOS                   9-MOS                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-START>                             JAN-01-1996             JAN-01-1996             JAN-01-1996
<PERIOD-END>                               JUN-30-1996             SEP-30-1996             DEC-31-1996
<CASH>                                           4,746                   3,430                   2,389
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                  117,197                 123,850                 128,112
<ALLOWANCES>                                    12,803                  12,920                  13,335
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                               136,358                 139,688                 146,990
<PP&E>                                         603,278                 615,418                 640,219
<DEPRECIATION>                                  92,730                  99,804                 106,762
<TOTAL-ASSETS>                                 770,195                 792,485                 802,784
<CURRENT-LIABILITIES>                          137,827                 146,084                 124,451
<BONDS>                                        174,831                 186,471                 202,295
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                           489                     489                     489
<OTHER-SE>                                     379,161                 381,249                 392,545
<TOTAL-LIABILITY-AND-EQUITY>                   770,195                 792,485                 802,784
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                               381,912                 581,117                 782,023
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                  306,353                 465,684                 625,331
<OTHER-EXPENSES>                                14,787                  22,752                  30,677
<LOSS-PROVISION>                                 3,020                   4,328                   8,073
<INTEREST-EXPENSE>                                   0                       0                  11,798
<INCOME-PRETAX>                                 40,801                  62,561                  84,918
<INCOME-TAX>                                    12,240                  18,768                  25,475
<INCOME-CONTINUING>                             28,561                  43,793                  59,443
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                    28,561                  43,793                  59,443
<EPS-PRIMARY>                                     0.62                    0.95                    1.30
<EPS-DILUTED>                                     0.59                    0.91                    1.24