<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>                     <C>                     <C>
<C>
<PERIOD-TYPE>                   YEAR                   YEAR                   3-MOS                   6-MOS
9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1998             DEC-31-1999             DEC-31-1999
             DEC-31-1999
<PERIOD-START>                             JAN-01-1999             JAN-01-1998             JAN-01-1999             JAN-01-1999
             JAN-01-1999
<PERIOD-END>                               DEC-31-1999             DEC-31-1998             MAR-31-1999             JUN-30-1999
             SEP-30-1999
<CASH>                                          13,469                  13,868                   7,966                   6,732
                   5,224
<SECURITIES>                                         0                       0                       0                       0
                       0
<RECEIVABLES>                                  266,988                 175,702                 212,874                 239,502
                 243,601
<ALLOWANCES>                                     2,475                   1,985                       0<F1>                   0<F1>
                       0<F1>
<INVENTORY>                                     15,640                   9,229                   8,564                  11,395
                  12,959
<CURRENT-ASSETS>                               321,682                 215,348                 214,151                 275,386
                 279,312
<PP&E>                                         119,189                  96,549                 105,761                 104,356
                 110,806
<DEPRECIATION>                                  71,633                  58,539                  65,971                  64,092
                  69,714
<TOTAL-ASSETS>                                 634,658                 369,923                 437,387                 494,693
                 520,808
<CURRENT-LIABILITIES>                          200,320                 119,458                 133,945                 138,897
                 148,793
<BONDS>                                        249,424                 137,879                 190,354                 224,176
                 223,616
<PREFERRED-MANDATORY>                                0                       0                       0                       0
                       0
<PREFERRED>                                        695                     695                     695                     695
                     695
<COMMON>                                           525                     435                     441                     474
                     507
<OTHER-SE>                                     165,128                  97,310                 104,489                 122,563
                 142,091
<TOTAL-LIABILITY-AND-EQUITY>                   634,658                 369,923                 437,387                 494,693
                 520,808
<SALES>                                        809,139                 532,236                 162,559                 354,005
                 566,895
<TOTAL-REVENUES>                               809,139                 532,236                 162,559                 354,005
                 566,895
<CGS>                                          611,059                 395,492                 122,587                 264,496
                 425,095
<TOTAL-COSTS>                                  611,059                 395,492                 122,587                 264,496
                 425,095
<OTHER-EXPENSES>                               101,534                 102,449                  29,346                  64,272
                  98,424
<LOSS-PROVISION>                                 3,256                     100                       0<F1>                   0<F1>
                       0<F1>
<INTEREST-EXPENSE>                              18,862                  11,808                   3,270                   7,980
                  12,988
<INCOME-PRETAX>                                 70,026                  23,205                   7,430                  17,433
                  31,181
<INCOME-TAX>                                    26,669                   9,184                   2,653                    6,094
                  10,814
<INCOME-CONTINUING>                             43,357                  14,021                   4,777                  11,339
                  20,367
<DISCONTINUED>                                 (5,600)                (12,566)                       0                       0
                       0
<EXTRAORDINARY>                                      0                (19,474)                       0                       0
                       0
<CHANGES>                                            0                       0                       0                       0
                       0
<NET-INCOME>                                    37,757                (18,019)                   4,777                  11,339
                  20,367
<EPS-BASIC>                                       0.79                  (0.45)                    0.11                    0.25
                    0.18
<EPS-DILUTED>                                     0.70                  (0.45)                    0.10                    0.22
                    0.16
<FN>
<F1>DUE TO THE USE OF CONDENSED FINANCIAL STATEMENTS FOR INTERIM REPORTING
PURPOSES, THIS INFORMATION IS NOT COMPILED ON A QUARTERLY BASIS.
</FN>


</TABLE>