Condensed Consolidated Balance Sheets (unaudited) (USD $) In Thousands	Jul. 01, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 3,894	$ 38,276
Marketable securities	356,942	314,135
Restricted cash		1,676
Prepaid expenses and other current assets	3,343	4,807
Assets held for sale		6,000
Total current assets	364,179	364,894
Other long-term assets	2,811	2,658
Total Assets	366,990	367,552
Current liabilities:
Accounts payable	1,538	3,353
Accrued and other liabilities	1,330	4,398
3/4% convertiable senior subordinated notes due 2023	346	346
Total current liabilities	3,214	8,097
Other long-term liabilities	11,245	12,203
Deferred income taxes	986	986
Total liabilities	15,445	21,286
Commitments and contingencies (Note 8)
Shareholders' Equity:
Common stock	108	108
Additional paid-in capital	171,476	170,987
Accumulated other comprehensive income, net of taxes	554	2,861
Retained earnings	179,407	172,310
Total shareholders' equity	351,545	346,266
Total Liabilities and Shareholders' Equity	$ 366,990	$ 367,552