Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 659,687	$ 601,602
Short-term investments	3,287	3,037
Receivables	79,997	136,772
Inventories	41,720	43,243
2015 Notes Hedges	257,775	215,113
Prepaid expenses and other	69,178	64,216
Total current assets	1,111,644	1,063,983
Property, plant and equipment, net of accumulated depreciation of $662,068 and $658,990, respectively	257,743	262,517
Goodwill	192,445	192,125
Acquired intangibles, net of accumulated amortization of $82,530 and $91,542,respectively	166,528	173,234
Long-term receivables	7,555	11,371
Other assets	58,917	58,039
Total Assets	1,794,832	1,761,269
Current Liabilities:
Convertible notes	297,653	294,061
2015 Notes Embedded Conversion Derivative	257,775	215,113
Accounts payable and accrued liabilities	143,760	165,791
Current portion of deferred revenue	312,238	340,401
Total current liabilities	1,011,426	1,015,366
Long-Term Liabilities:
Long-term portion of deferred revenue	62,634	73,959
Convertible notes	133,459	131,920
Other long-term liabilities	126,561	128,894
Total long-term liabilities	322,654	334,773
Commitments and Contingencies (Note 12)
Stockholders' Equity:
Common stock and capital in excess of par value	1,735,689	1,733,884
Treasury stock, at cost	(269,646)	(290,462)
Accumulated deficit	(1,053,745)	(1,083,245)
Accumulated other comprehensive income	48,454	50,953
Total stockholders' equity	460,752	411,130
Total Liabilities and Stockholders' Equity	$ 1,794,832	$ 1,761,269