UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 442,845	$ 419,693
Marketable securities	26,842	34,874
Tuition receivable, net	41,335	51,523
Other current assets	21,761	18,004
Total current assets	532,783	524,094
Property and equipment, net	117,284	117,029
Right-of-use lease assets	82,345	84,778
Marketable securities, non-current	36,590	36,633
Intangible assets, net	259,178	273,011
Goodwill	732,075	732,075
Other assets	23,566	21,788
Total assets	1,783,821	1,789,408
Current liabilities:
Accounts payable and accrued expenses	81,859	90,828
Income taxes payable	13,728	1,352
Contract liabilities	40,495	39,284
Lease liabilities	24,806	25,284
Total current liabilities	160,888	156,748
Deferred income tax liabilities	44,581	47,942
Lease liabilities, non-current	78,765	80,557
Other long-term liabilities	40,440	41,451
Total liabilities	324,674	326,698
Commitments and contingencies
Stockholders’ equity:
Common stock, par value $0.01; 32,000,000 shares authorized; 21,964,809 and 22,213,587 shares issued and outstanding at December 31, 2019 and March 31, 2020, respectively	222	220
Additional paid-in capital	1,287,406	1,309,438
Accumulated other comprehensive income	253	233
Retained earnings	171,266	152,819
Total stockholders’ equity	1,459,147	1,462,710
Total liabilities and stockholders’ equity	$ 1,783,821	$ 1,789,408