<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> JUN-30-1999 <CASH> 3,201 <SECURITIES> 6,587 <RECEIVABLES> 288,976 <ALLOWANCES> 0 <INVENTORY> 18,418 <CURRENT-ASSETS> 372,245 <PP&E> 349,306 <DEPRECIATION> 106,533 <TOTAL-ASSETS> 1,160,805 <CURRENT-LIABILITIES> 143,020 <BONDS> 323,555 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 848 <OTHER-SE> 668,998 <TOTAL-LIABILITY-AND-EQUITY> 1,160,805 <SALES> 0 <TOTAL-REVENUES> 515,626 <CGS> 0 <TOTAL-COSTS> 475,212 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 9,933 <INCOME-PRETAX> 30,481 <INCOME-TAX> 15,180 <INCOME-CONTINUING> 15,301 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 15,301 <EPS-BASIC> 0.15 <EPS-DILUTED> 0.15