UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 717,804	$ 419,693
Marketable securities	20,457	34,874
Tuition receivable, net	45,958	51,523
Other current assets	22,156	18,004
Total current assets	806,375	524,094
Property and equipment, net	115,607	117,029
Right-of-use lease assets	80,719	84,778
Marketable securities, non-current	30,663	36,633
Intangible assets, net	231,511	273,011
Goodwill	732,075	732,075
Other assets	50,369	21,788
Total assets	2,047,319	1,789,408
Current liabilities:
Accounts payable and accrued expenses	115,829	90,828
Income taxes payable	12,093	1,352
Contract liabilities	42,633	39,284
Lease liabilities	24,740	25,284
Total current liabilities	195,295	156,748
Deferred income tax liabilities	34,012	47,942
Lease liabilities, non-current	76,802	80,557
Other long-term liabilities	36,152	41,451
Total liabilities	342,261	326,698
Commitments and contingencies
Stockholders’ equity:
Common stock, par value $0.01; 32,000,000 shares authorized; 21,964,809 and 24,403,364 shares issued and outstanding at December 31, 2019 and September 30, 2020, respectively	244	220
Additional paid-in capital	1,515,662	1,309,438
Accumulated other comprehensive income	760	233
Retained earnings	188,392	152,819
Total stockholders’ equity	1,705,058	1,462,710
Total liabilities and stockholders’ equity	$ 2,047,319	$ 1,789,408