UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 238,290	$ 187,509
Marketable securities	6,455	7,557
Tuition receivable, net	63,469	50,169
Income taxes receivable	0	1,429
Other current assets	44,714	39,458
Total current assets	352,928	286,122
Property and equipment, net	164,277	158,854
Right-of-use lease assets	142,998	120,687
Marketable securities, non-current	29,280	30,270
Intangible assets, net	308,190	326,420
Goodwill	1,311,487	1,318,526
Other assets	60,282	54,928
Total assets	2,369,442	2,295,807
Current liabilities:
Accounts payable and accrued expenses	97,448	104,742
Income taxes payable	11,350	0
Contract liabilities	108,073	60,501
Lease liabilities	32,886	34,809
Total current liabilities	249,757	200,052
Long-term debt	141,798	141,823
Deferred income tax liabilities	44,264	53,407
Lease liabilities, non-current	152,981	106,151
Other long-term liabilities	44,717	46,055
Total liabilities	633,517	547,488
Commitments and contingencies
Stockholders’ equity:
Common stock, par value $0.01; 32,000,000 shares authorized; 24,418,939 and 24,651,205 shares issued and outstanding at December 31, 2020 and March 31, 2021, respectively	247	244
Additional paid-in capital	1,521,145	1,519,549
Accumulated other comprehensive income	40,064	48,880
Retained earnings	174,469	179,646
Total stockholders’ equity	1,735,925	1,748,319
Total liabilities and stockholders’ equity	$ 2,369,442	$ 2,295,807