<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-Q
AS OF MARCH 31, 1996 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               MAR-31-1996
<CASH>                                               0
<SECURITIES>                                         0
<RECEIVABLES>                                  176,705<F1>
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               220,937
<PP&E>                                         327,937
<DEPRECIATION>                               (187,763)
<TOTAL-ASSETS>                                 906,569
<CURRENT-LIABILITIES>                          140,942
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                     99,993
<COMMON>                                           662
<OTHER-SE>                                     259,869
<TOTAL-LIABILITY-AND-EQUITY>                   906,569
<SALES>                                              0
<TOTAL-REVENUES>                               250,559
<CGS>                                                0
<TOTAL-COSTS>                                  148,587
<OTHER-EXPENSES>                                71,080
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               7,376
<INCOME-PRETAX>                                 23,516
<INCOME-TAX>                                     8,230
<INCOME-CONTINUING>                             15,286
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    15,286
<EPS-PRIMARY>                                     0.18
<EPS-DILUTED>                                     0.18
<FN>
<F1>Trade Accounts Receivable, Less Allowance for Doubtful Accounts.
</FN>