Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 6,063,678	$ 5,988,187
Marketable securities	644,315	670,710
Accounts receivable, net	929,142	885,352
Inventories	321,620	280,777
Prepaid expenses and other current assets	498,759	308,353
Total current assets	8,457,514	8,133,379
Property and equipment, net	1,021,233	958,534
Goodwill	1,002,158	1,002,158
Intangible assets	400,000	400,000
Deferred tax assets	952,808	882,779
Operating lease assets	316,874	325,564
Other assets	71,099	49,394
Total assets	12,221,686	11,751,808
Current liabilities:
Accounts payable	127,534	155,139
Accrued expenses	1,482,556	1,404,971
Other current liabilities	226,358	317,423
Total current liabilities	1,836,448	1,877,533
Long-term finance lease liabilities	524,925	539,042
Long-term operating lease liabilities	368,924	350,463
Long-term contingent consideration	187,300	189,600
Other long-term liabilities	107,693	108,355
Total liabilities	3,025,290	3,064,993
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, 259,114 and 259,890 shares issued and outstanding, respectively	2,591	2,599
Additional paid-in capital	7,640,233	7,894,027
Accumulated other comprehensive loss	(25,159)	(68,480)
Retained earnings	1,578,731	858,669
Total shareholders’ equity	9,196,396	8,686,815
Total liabilities and shareholders’ equity	$ 12,221,686	$ 11,751,808