Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 5,358,087	$ 3,109,322
Marketable securities	792,971	698,972
Accounts receivable, net	791,917	633,518
Inventories	245,460	167,502
Prepaid expenses and other current assets	270,021	213,515
Total current assets	7,458,456	4,822,829
Property and equipment, net	920,913	745,080
Goodwill	1,002,158	1,002,158
Intangible assets	400,000	400,000
Deferred tax assets	1,147,816	1,190,815
Other assets	372,290	157,583
Total assets	11,301,633	8,318,465
Current liabilities:
Accounts payable	107,786	87,610
Accrued expenses	1,703,699	1,116,912
Other current liabilities	192,541	130,305
Total current liabilities	2,004,026	1,334,827
Long-term finance lease liabilities	546,514	538,576
Long-term contingent consideration	189,100	176,500
Other long-term liabilities	428,520	183,318
Total liabilities	3,168,160	2,233,221
Commitments and contingencies	0	0
Shareholders’ equity:
Preferred stock, $0.01 par value; 1,000 shares authorized; none issued and outstanding	0	0
Common stock, $0.01 par value; 500,000 shares authorized, 260,174 and 258,993 shares issued and outstanding, respectively	2,601	2,589
Additional paid-in capital	7,917,375	7,937,606
Accumulated other comprehensive loss	(40,982)	(1,973)
Retained earnings (accumulated deficit)	254,479	(1,852,978)
Total shareholders’ equity	8,133,473	6,085,244
Total liabilities and shareholders’ equity	$ 11,301,633	$ 8,318,465