Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 213,667	$ 268,918
Marketable securities	9,156	6,501
Tuition receivable, net	62,953	51,277
Income taxes receivable	0	313
Other current assets	43,285	40,777
Total current assets	329,061	367,786
Property and equipment, net	132,845	150,589
Right-of-use lease assets	125,248	149,587
Marketable securities, non-current	13,123	23,377
Intangible assets, net	260,541	276,380
Goodwill	1,251,277	1,285,864
Other assets	49,652	52,297
Total assets	2,161,747	2,305,880
Current liabilities:
Accounts payable and accrued expenses	90,588	95,518
Income taxes payable	6,989	0
Contract liabilities	88,488	73,232
Lease liabilities	23,879	27,005
Total current liabilities	209,944	195,755
Long-term debt	101,396	141,630
Deferred income tax liabilities	34,605	44,595
Lease liabilities, non-current	134,006	162,821
Other long-term liabilities	46,006	47,089
Total liabilities	525,957	591,890
Commitments and contingencies
Stockholders’ equity:
Common stock, par value $0.01; 32,000,000 shares authorized; 24,592,098 and 24,402,891 shares issued and outstanding at December 31, 2021 and 2022, respectively	244	246
Additional paid-in capital	1,510,924	1,529,969
Accumulated other comprehensive income (loss)	(35,068)	9,203
Retained earnings	159,690	174,572
Total stockholders’ equity	1,635,790	1,713,990
Total liabilities and stockholders’ equity	$ 2,161,747	$ 2,305,880