Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 191,608	$ 339,223
Marketable securities	1,233,076	1,384,062
Accounts receivable, net	13,448	13,631
Other current assets	52,475	66,283
Total current assets	1,490,607	1,803,199
Property and equipment, net	319,028	339,653
Goodwill	52,527	52,527
Long-term deferred tax assets	266,954	437,643
Other long-term assets	25,743	27,745
Total long-term assets	664,252	857,568
Total assets	2,154,859	2,660,767
Current liabilities:
Accounts payable and accrued liabilities	190,278	149,276
Deferred revenues	621,307	595,221
Convertible Debentures, including contingent interest derivative	631,190	624,056
Deferred Tax Liabilities, Net, Current	477,781	660,633
Total current liabilities	1,920,556	2,029,186
Long-term deferred revenues	269,047	260,615
Senior Notes	750,000	750,000
Other long-term tax liabilities	98,722	44,524
Total long-term liabilities	1,117,769	1,055,139
Total liabilities	3,038,325	3,084,325
Commitments and contingencies
Stockholders' deficit:
Preferred stock	0	0
Common stock	322	320
Additional paid-in capital	18,120,045	18,935,302
Accumulated deficit	(19,000,835)	(19,356,095)
Accumulated other comprehensive loss	(2,998)	(3,085)
Total stockholders' deficit	(883,466)	(423,558)
Total liabilities and stockholders' deficit	$ 2,154,859	$ 2,660,767