<ARTICLE> 5
<MULTIPLIER> 1,000
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1995
<PERIOD-END>                               MAR-31-1995
<CASH>                                          86,346
<SECURITIES>                                         0
<RECEIVABLES>                                   61,038
<ALLOWANCES>                                     2,280
<INVENTORY>                                      5,065
<CURRENT-ASSETS>                               165,264
<PP&E>                                         241,129
<DEPRECIATION>                                 124,770
<TOTAL-ASSETS>                                 471,157
<CURRENT-LIABILITIES>                           59,287
<BONDS>                                        128,750
<COMMON>                                           226
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                     347,644
<TOTAL-LIABILITY-AND-EQUITY>                   471,157
<SALES>                                        108,523
<TOTAL-REVENUES>                               108,523
<CGS>                                           44,189
<TOTAL-COSTS>                                   44,189
<OTHER-EXPENSES>                                 6,709
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               2,712
<INCOME-PRETAX>                                 14,556
<INCOME-TAX>                                     5,703
<INCOME-CONTINUING>                              8,853
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     8,853
<EPS-PRIMARY>                                     0.54
<EPS-DILUTED>                                        0