Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 661,658	$ 601,602
Short-term investments	51,304	3,037
Receivables	123,243	136,772
Inventories	41,066	43,243
2015 Notes Hedges	219,199	215,113
Prepaid expenses and other	61,976	64,216
Total current assets	1,158,446	1,063,983
Property, plant and equipment, net of accumulated depreciation of $668,328 and $658,990, respectively	251,920	262,517
Goodwill	192,238	192,125
Acquired intangibles, net of accumulated amortization of $89,572 and $91,542, respectively	159,807	173,234
Long-term receivables	7,750	11,371
Other assets	59,096	58,039
Total Assets	1,829,257	1,761,269
Current Liabilities:
Convertible notes	301,292	294,061
2015 Notes Embedded Conversion Derivative	219,199	215,113
Accounts payable and accrued liabilities	153,957	165,791
Current portion of deferred revenue	328,405	340,401
Total current liabilities	1,002,853	1,015,366
Long-Term Liabilities:
Long-term portion of deferred revenue	58,213	73,959
Convertible notes	135,006	131,920
Other long-term liabilities	131,172	128,894
Total long-term liabilities	324,391	334,773
Commitments and Contingencies (Note 12)
Stockholders' Equity:
Common Stock and capital in excess of par value	1,741,869	1,733,884
Treasury stock, at cost	(266,820)	(290,462)
Accumulated deficit	(1,018,190)	(1,083,245)
Accumulated other comprehensive income	45,154	50,953
Total stockholders' equity	502,013	411,130
Total Liabilities and Stockholders' Equity	$ 1,829,257	$ 1,761,269