Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 508,196	$ 357,415
Marketable securities	709,863	912,254
Other current assets	60,530	47,365
Total current assets	1,278,589	1,317,034
Property and equipment, net	250,283	253,905
Goodwill	52,527	52,527
Long-term deferred tax assets	87,798	104,992
Deposits Assets, Noncurrent	145,000	145,000
Other long-term assets	39,812	41,046
Total long-term assets	575,420	597,470
Total assets	1,854,009	1,914,504
Current liabilities:
Accounts payable and accrued liabilities	209,988	215,208
Deferred revenues	755,178	732,382
Total current liabilities	965,166	947,590
Long-term deferred revenues	278,702	285,720
Senior Notes	1,787,565	1,785,047
Other long-term tax liabilities	312,676	281,621
Total long-term liabilities	2,378,943	2,352,388
Total liabilities	3,344,109	3,299,978
Commitments and contingencies
Stockholders' deficit:
Preferred stock	0	0
Common stock	353	352
Additional paid-in capital	14,989,658	15,706,774
Accumulated deficit	(16,477,490)	(17,089,789)
Accumulated other comprehensive loss	(2,621)	(2,811)
Total stockholders' deficit	(1,490,100)	(1,385,474)
Total liabilities and stockholders' deficit	$ 1,854,009	$ 1,914,504