Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
CURRENT ASSETS:
Cash and cash equivalents, unrestricted		$ 125,807	$ 118,009
Restricted cash		1,024	1,012
Total cash, cash equivalents and restricted cash		126,831	119,021
Short-term investments		515,602	485,135
Total cash and cash equivalents, restricted cash and short-term investments		642,433	604,156
Student receivables, gross		77,410	64,011
Allowance for credit losses		(35,468)	(34,613)
Student receivables, net		41,942	29,398
Receivables, other		5,289	4,539
Prepaid expenses		11,912	11,712
Inventories		4,251	5,004
Other current assets		196	155
Total current assets		706,023	654,964
NON-CURRENT ASSETS:
Property and equipment, net of accumulated depreciation of $60,694 and $58,785 as of March 31, 2024 and December 31, 2023, respectively		20,938	21,371
Right of use asset, net		13,963	19,096
Goodwill		241,162	241,162
Intangible assets, net of amortization of $24,720 and $23,612 as of March 31, 2024 and December 31, 2023, respectively		35,110	36,219
Student receivables, gross		7,946	7,028
Allowance for credit losses		(3,086)	(3,169)
Student receivables, net		4,860	3,859
Deferred income tax assets, net		23,063	23,804
Other assets		6,846	6,841
TOTAL ASSETS	[1]	1,051,965	1,007,316
CURRENT LIABILITIES:
Lease liability-operating		5,989	5,701
Accounts payable		11,830	10,766
Accrued expenses:
Payroll and related benefits		18,726	32,684
Advertising and marketing costs		6,810	7,196
Income taxes		16,543	3,974
Other		21,112	13,503
Deferred revenue		61,498	37,215
Total current liabilities		142,508	111,039
NON-CURRENT LIABILITIES:
Lease liability-operating		16,701	21,346
Other liabilities		26,650	33,510
Total non-current liabilities		43,351	54,856
Commitments and Contingencies (Note 8)
STOCKHOLDERS' EQUITY:
Preferred stock, $0.01 par value; 1,000,000 shares authorized; none issued or outstanding
Common stock, $0.01 par value; 300,000,000 shares authorized; 90,907,065 and 90,270,306 shares issued, 65,602,629 and 65,544,539 shares outstanding as of March 31, 2024 and December 31, 2023, respectively		909	903
Additional paid-in capital		698,619	694,798
Accumulated other comprehensive loss		(1,620)	(666)
Retained earnings		512,622	480,606
Treasury stock, at cost; 25,304,436 and 24,725,767 shares as of March 31, 2024 and December 31, 2023, respectively		(344,424)	(334,220)
Total stockholders' equity		866,106	841,421
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		$ 1,051,965	$ 1,007,316

[1] Total assets are presented on a condensed consolidated basis and do not include intercompany receivable or payable activity between institutions and corporate and investments in subsidiaries.