Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 231,945	$ 228,659
Marketable securities	1,565,962	1,686,771
Accounts receivable, net	13,051	12,638
Other current assets	31,384	39,856
Total current assets	1,842,342	1,967,924
Property and equipment, net	266,125	295,570
Goodwill	52,527	52,527
Long-term deferred tax assets	9,385	17,361
Deposits Assets, Noncurrent	145,000	2,000
Other long-term assets	19,193	22,355
Total long-term assets	492,230	389,813
Total assets	2,334,572	2,357,737
Current liabilities:
Accounts payable and accrued liabilities	203,920	188,171
Deferred revenues	688,265	680,483
Convertible Debentures, including contingent interest derivative	629,764	634,326
Total current liabilities	1,521,949	1,502,980
Long-term deferred revenues	287,424	280,859
Senior Notes	1,237,189	1,235,354
Deferred Tax Liabilities, Net, Noncurrent	371,433	294,194
Other long-term tax liabilities	117,172	114,797
Total long-term liabilities	2,013,218	1,925,204
Total liabilities	3,535,167	3,428,184
Commitments and contingencies
Stockholders' deficit:
Preferred stock	0	0
Common stock	324	323
Additional paid-in capital	16,987,488	17,558,822
Accumulated deficit	(18,184,954)	(18,625,599)
Accumulated other comprehensive loss	(3,453)	(3,993)
Total stockholders' deficit	(1,200,595)	(1,070,447)
Total liabilities and stockholders' deficit	$ 2,334,572	$ 2,357,737