<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
Company's consolidated balance sheets as of 3/30/1997, 6/30/1997, and
9/30/1997, and the related consolidated statements of operations for the
quarters ended 3/30/1997, 6/30/1997, and 9/30/1997 and the notes thereto, and
is qualified in its entirety by reference to such consolidated financial
statements and notes.
</LEGEND>
<RESTATED>
<MULTIPLIER> 1,000

<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-END>                               MAR-31-1997             JUN-30-1997             SEP-30-1997
<CASH>                                          63,059                  41,008                 166,583
<SECURITIES>                                   193,789                 145,186                 288,127
<RECEIVABLES>                                   19,027                  22,975                  27,849
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                      8,305                  13,792                  15,858
<CURRENT-ASSETS>                               284,180                 222,961                 498,417
<PP&E>                                          34,111                  44,000                  48,946
<DEPRECIATION>                                   3,346                   4,044                   4,798
<TOTAL-ASSETS>                                 518,147                 535,536                 821,105
<CURRENT-LIABILITIES>                           53,615                  57,017                  41,141
<BONDS>                                              0                       0                 287,500
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                       528,069                 531,377                 533,047
<OTHER-SE>                                    (73,036)                (62,659)                (50,750)
<TOTAL-LIABILITY-AND-EQUITY>                   518,147                 535,536                 821,105
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                                40,893                  84,523                 127,867
<CGS>                                            7,970                  15,946                  23,373
<TOTAL-COSTS>                                   21,753                  45,105                  67,845
<OTHER-EXPENSES>                                     0                       0                       0
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                                   0                       0                       0
<INCOME-PRETAX>                                 14,404                  29,573                  45,752
<INCOME-TAX>                                     5,617                  11,504                  16,357
<INCOME-CONTINUING>                              8,787                  18,069                  29,395
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     8,787                  18,069                  29,395
<EPS-PRIMARY>                                     0.20                    0.42                    0.67
<EPS-DILUTED>                                     0.19                    0.38                    0.62


</TABLE>