Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 2,228,838	$ 610,917
Short-term investments	12,875	529,395
Accounts receivable, net of allowance for doubtful accounts of $10,352 and $9,466	291,964	262,570
Current portion of restricted cash	479,417	3,057
Other current assets	212,929	85,004
Assets held for sale	33,257	0
Total current assets	3,259,280	1,490,943
Long-term investments	4,584	439
Property, plant and equipment, net	5,606,436	4,998,270
Goodwill	1,063,200	1,002,129
Intangible assets, net	224,565	147,527
Restricted cash, less current portion	10,172	14,060
Other assets	188,458	128,610
Total assets	10,356,695	7,781,978
Current liabilities:
Accounts payable and accrued expenses	400,948	285,796
Accrued property, plant and equipment	103,107	114,469
Current portion of capital lease and other financing obligations	40,121	21,362
Current portion of mortgage and loans payable	770,236	59,466
Current portion of convertible debt	146,121	0
Other current liabilities	192,286	162,664
Liabilities held for sale	3,535	0
Total current liabilities	1,656,354	643,757
Capital lease and other financing obligations, less current portion	1,287,139	1,168,042
Mortgage and loans payable, less current portion	472,769	532,809
Convertible debt, less current portion	0	145,229
Senior notes	3,804,634	2,717,046
Other liabilities	390,413	304,964
Total liabilities	$ 7,611,309	$ 5,511,847
Commitments and contingencies (Note 14)
Stockholders' equity:
Preferred stock, $0.001 par value per share: 100,000,000 shares authorized in 2015 and 2014; zero shares issued and outstanding	$ 0	$ 0
Common stock, $0.001 par value per share: 300,000,000 shares authorized in 2015 and 2014; 62,134,894 issued and 62,100,159 outstanding in 2015 and 56,505,122 issued and 56,451,255 outstanding in 2014	62	57
Additional paid-in capital	4,838,444	3,334,305
Treasury stock, at cost; 34,735 shares in 2015 and 53,867 shares in 2014	(7,373)	(11,411)
Accumulated dividends	(1,468,472)	(424,387)
Accumulated other comprehensive loss	(509,059)	(332,443)
Accumulated deficit	(108,216)	(295,990)
Total stockholders' equity	2,745,386	2,270,131
Total liabilities and stockholders' equity	$ 10,356,695	$ 7,781,978