<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> SEP-30-2000
<CASH> 14,043
<SECURITIES> 0
<RECEIVABLES> 342,002
<ALLOWANCES> 0
<INVENTORY> 14,481
<CURRENT-ASSETS> 459,502
<PP&E> 432,520
<DEPRECIATION> (161,841)
<TOTAL-ASSETS> 1,307,542
<CURRENT-LIABILITIES> 225,732
<BONDS> 292,835
0
0
<COMMON> 920
<OTHER-SE> 747,959
<TOTAL-LIABILITY-AND-EQUITY> 1,307,542
<SALES> 968,318
<TOTAL-REVENUES> 968,318
<CGS> 0
<TOTAL-COSTS> 893,597
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 20,515
<INCOME-PRETAX> 81,772
<INCOME-TAX> 31,073
<INCOME-CONTINUING> 50,699
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 50,699
<EPS-BASIC> .50
<EPS-DILUTED> .50
</TABLE>