<TABLE> <S> <C>

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

<S>                             <C>                     <C>                     <C>                     <C>
<PERIOD-TYPE>                   YEAR                   YEAR                   YEAR                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1998             DEC-31-1999             JUN-30-2000
<PERIOD-START>                             JAN-01-1997             JAN-01-1998             JAN-01-1999             JAN-01-2000
<PERIOD-END>                               DEC-31-1997             DEC-31-1998             DEC-31-1999             JUN-30-2000
<CASH>                                          16,263                  13,480                  18,788                  23,832
<SECURITIES>                                    20,566                  13,285                 684,156                 189,695
<RECEIVABLES>                                   30,621                  44,449                  53,920                  49,801
<ALLOWANCES>                                     2,578                   1,545                   2,056                   2,073
<INVENTORY>                                     11,010                  15,468                  27,897                  21,081
<CURRENT-ASSETS>                                55,744                  73,808                  99,928                  98,146
<PP&E>                                          69,253                  77,493                 165,494                 185,351
<DEPRECIATION>                                   9,878                  11,978                  51,579                  60,769
<TOTAL-ASSETS>                                 925,572               1,069,946               1,840,610               1,366,431
<CURRENT-LIABILITIES>                           47,253                  70,611                 157,795                 116,225
<BONDS>                                         88,632                  94,092                 152,303                 172,698
<PREFERRED-MANDATORY>                                0                       0                       0                       0
<PREFERRED>                                          0                       0                       0                       0
<COMMON>                                             0                       0                       0                       0
<OTHER-SE>                                     864,406               1,004,753                 987,564               1,001,521
<TOTAL-LIABILITY-AND-EQUITY>                   925,572               1,069,946               1,840,610               1,366,431
<SALES>                                         59,149                  94,785                 125,228                  48,756
<TOTAL-REVENUES>                               160,903                 226,347                 379,194                 170,431
<CGS>                                          120,065                 167,823                 293,263                 120,896
<TOTAL-COSTS>                                   36,058                  34,898                  90,977                  58,969
<OTHER-EXPENSES>                              (49,223)                (25,299)                (46,644)                   4,213
<LOSS-PROVISION>                                 (447)                 (1,033)                     515                      14
<INTEREST-EXPENSE>                               6,618                  12,896                   9,770                   6,730
<INCOME-PRETAX>                                 47,832                  37,062                  31,313                (20,391)
<INCOME-TAX>                                     7,674                   (315)                  16,550                 (8,050)
<INCOME-CONTINUING>                             40,157                  37,377                  14,764                (12,341)
<DISCONTINUED>                                       0                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
<CHANGES>                                            0                       0                       0                       0
<NET-INCOME>                                    40,157                  37,377                  14,764                (12,341)
<EPS-BASIC>                                       0.31                    0.29                    0.12                  (0.10)
<EPS-DILUTED>                                     0.31                    0.29                    0.12                  (0.10)


</TABLE>