Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 386,718	$ 385,949
Marketable securities	711,502	898,821
Accounts receivable, net of allowance of $0 and $160 at September 30, 2013 and December 31, 2012 respectively	66,571	106,327
Income tax receivable	6,076	5,607
Deferred tax assets	16,487	30,122
Restricted cash	3,549	28,152
Other current assets	31,090	29,392
Total current assets	1,221,993	1,484,370
Long-term marketable securities	425,714	367,543
Goodwill	228,296	208,955
Other intangible assets, net	19,747	33,663
Property and equipment, net	381,283	466,074
Other long-term assets	22,754	15,715
Total assets	2,299,787	2,576,320
Current liabilities:
Accounts payable	20,570	23,298
Other current liabilities	74,346	146,883
Deferred revenue	216,427	338,964
Total current liabilities	311,343	509,145
Long-term debt		100,000
Deferred revenue	3,173	8,041
Deferred tax liabilities		24,584
Other non-current liabilities	112,517	109,047
Total liabilities	427,033	750,817
Stockholders' equity:
Common stock, $.00000625 par value, and additional paid in capital-authorized shares: 2,020,517; shares outstanding: 814,166 (Class A, 658,068, Class B, 135,581, Class C, 20,517) as of September 30, 2013 and 779,250 (Class A, 589,100, Class B, 169,633, Class C, 20,517) as of December 31, 2012	2,793,282	2,725,605
Treasury stock	(6,870)	(295,113)
Accumulated other comprehensive income (loss)	(545)	(1,447)
Accumulated deficit	(913,113)	(603,542)
Total stockholders' equity	1,872,754	1,825,503
Total liabilities and stockholders' equity	$ 2,299,787	$ 2,576,320