UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 261,585	$ 187,509
Marketable securities	4,040	7,557
Tuition receivable, net	78,609	50,169
Income taxes receivable	0	1,429
Assets held for sale	5,801	0
Other current assets	43,600	39,458
Total current assets	393,635	286,122
Property and equipment, net	153,812	158,854
Right-of-use lease assets	134,069	120,687
Marketable securities, non-current	28,062	30,270
Intangible assets, net	289,985	326,420
Goodwill	1,303,863	1,318,526
Other assets	59,887	54,928
Total assets	2,363,313	2,295,807
Current liabilities:
Accounts payable and accrued expenses	100,119	104,742
Income taxes payable	4,015	0
Contract liabilities	118,771	60,501
Lease liabilities	29,284	34,809
Total current liabilities	252,189	200,052
Long-term debt	141,748	141,823
Deferred income tax liabilities	42,810	53,407
Lease liabilities, non-current	148,382	106,151
Other long-term liabilities	45,004	46,055
Total liabilities	630,133	547,488
Commitments and contingencies
Stockholders’ equity:
Common stock, par value $0.01; 32,000,000 shares authorized; 24,418,939 and 24,621,111 shares issued and outstanding at December 31, 2020 and June 30, 2021, respectively	246	244
Additional paid-in capital	1,523,022	1,519,549
Accumulated other comprehensive income	30,823	48,880
Retained earnings	179,089	179,646
Total stockholders’ equity	1,733,180	1,748,319
Total liabilities and stockholders’ equity	$ 2,363,313	$ 2,295,807