CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 377,811	$ 536,725
Marketable securities	129,058	541,470
Accounts receivable, net of reserves of $3,279 and $1,397 at March 31, 2022, and December 31, 2021, respectively	718,793	675,926
Prepaid expenses and other current assets	238,821	166,313
Total current assets	1,464,483	1,920,434
Marketable securities	786,712	1,088,048
Property and equipment, net	1,579,833	1,534,329
Operating lease right-of-use assets	819,880	815,754
Acquired intangible assets, net	512,188	313,225
Goodwill	2,745,882	2,156,254
Deferred income tax assets	265,946	168,342
Other assets	128,855	142,287
Total assets	8,303,779	8,138,673
Current liabilities:
Accounts payable	122,934	109,928
Accrued expenses	342,802	411,590
Deferred revenue	139,725	86,517
Revolving credit facility	75,000	0
Operating lease liabilities	183,762	175,683
Other current liabilities	5,042	6,623
Total current liabilities	869,265	790,341
Deferred revenue	30,098	25,342
Deferred income tax liabilities	41,131	40,974
Convertible senior notes	2,281,927	1,976,167
Operating lease liabilities	703,605	707,087
Other liabilities	77,231	68,748
Total liabilities	4,003,257	3,608,659
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value; 5,000,000 shares authorized; 700,000 shares designated as Series A Junior Participating Preferred Stock; no shares issued or outstanding	0	0
Common stock, $0.01 par value; 700,000,000 shares authorized; 160,513,059 shares issued and 160,512,135 shares outstanding at March 31, 2022, and 160,512,111 shares issued and outstanding at December 31, 2021	1,615	1,605
Additional paid-in capital	2,974,529	3,340,822
Accumulated other comprehensive loss	(88,611)	(69,105)
Treasury stock, at cost, 924,492 shares at March 31, 2022, and no shares at December 31, 2021	(102,853)	0
Retained earnings	1,515,842	1,256,692
Total stockholders’ equity	4,300,522	4,530,014
Total liabilities and stockholders’ equity	$ 8,303,779	$ 8,138,673