CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 426,710	$ 536,725
Marketable securities	263,979	541,470
Accounts receivable, net of reserves of $2,012 and $1,397 at June 30, 2022, and December 31, 2021, respectively	668,425	675,926
Prepaid expenses and other current assets	207,043	166,313
Total current assets	1,566,157	1,920,434
Marketable securities	640,668	1,088,048
Property and equipment, net	1,541,875	1,534,329
Operating lease right-of-use assets	797,313	815,754
Acquired intangible assets, net	476,707	313,225
Goodwill	2,763,828	2,156,254
Deferred income tax assets	292,817	168,342
Other assets	131,689	142,287
Total assets	8,211,054	8,138,673
Current liabilities:
Accounts payable	131,649	109,928
Accrued expenses	306,402	411,590
Deferred revenue	111,771	86,517
Revolving credit facility	75,000	0
Operating lease liabilities	186,945	175,683
Other current liabilities	5,317	6,623
Total current liabilities	817,084	790,341
Deferred revenue	25,448	25,342
Deferred income tax liabilities	39,367	40,974
Convertible senior notes	2,283,037	1,976,167
Operating lease liabilities	679,031	707,087
Other liabilities	86,609	68,748
Total liabilities	3,930,576	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; 162,029,136 shares issued and 159,469,828 shares outstanding at June 30, 2022, and 160,512,111 shares issued and outstanding at December 31, 2021	1,620	1,605
Additional paid-in capital	3,054,200	3,340,822
Accumulated other comprehensive loss	(143,079)	(69,105)
Treasury stock, at cost, 2,559,308 shares at June 30, 2022, and no shares at December 31, 2021	(267,642)	0
Retained earnings	1,635,379	1,256,692
Total stockholders’ equity	4,280,478	4,530,014
Total liabilities and stockholders’ equity	$ 8,211,054	$ 8,138,673