Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 401,194	$ 508,196
Marketable securities	765,713	709,863
Other current assets	51,033	60,530
Total current assets	1,217,940	1,278,589
Property and equipment, net	245,571	250,283
Goodwill	52,527	52,527
Deferred Income Tax Assets, Net	67,914	87,798
Deposits Assets, Noncurrent	145,000	145,000
Other long-term assets	37,958	39,812
Total long-term assets	548,970	575,420
Total assets	1,766,910	1,854,009
Current liabilities:
Accounts payable and accrued liabilities	208,642	209,988
Deferred revenues	780,051	755,178
Total current liabilities	988,693	965,166
Long-term deferred revenues	282,838	278,702
Senior Notes	1,790,083	1,787,565
Other long-term tax liabilities	95,494	312,676
Total long-term liabilities	2,168,415	2,378,943
Total liabilities	3,157,108	3,344,109
Commitments and contingencies
Stockholders' deficit:
Preferred stock	0	0
Common Stocks, Including Additional Paid in Capital	14,275,160	14,990,011
Accumulated deficit	(15,662,602)	(16,477,490)
Accumulated other comprehensive loss	(2,756)	(2,621)
Total stockholders' deficit	(1,390,198)	(1,490,100)
Total liabilities and stockholders' deficit	$ 1,766,910	$ 1,854,009
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, authorized shares	5,000	5,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, authorized shares	1,000,000	1,000,000
Common Stock, Shares, Issued	353,789	353,157
Common stock, outstanding shares	113,470	116,715