Condensed Balance Sheets (unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 10,110	$ 38,276
Marketable securities	344,141	314,135
Restricted cash		1,676
Prepaid expenses and other current assets	2,691	4,807
Assets held for sale		6,000
Total current assets	356,942	364,894
Property and equipment, net	5,923
Goodwill	1,988
Intangible assets, net	227
Other long-term assets	3,452	2,658
Total Assets	368,532	367,552
Current liabilities:
Accounts payable	1,569	3,353
Accrued and other liabilities	1,430	4,398
3/4% convertiable senior subordinated notes due 2023	346	346
Total current liabilities	3,345	8,097
Other long-term liabilities	10,525	12,203
Deferred income taxes	986	986
Total liabilities	14,856	21,286
Commitments and contingencies (Note 9)
Shareholders' Equity:
Common stock	108	108
Additional paid-in capital	172,006	170,987
Accumulated other comprehensive income, net of taxes	820	2,861
Retained earnings	180,742	172,310
Total shareholders' equity	353,676	346,266
Total Liabilities and Shareholders' Equity	$ 368,532	$ 367,552