Condensed Consolidated Balance Sheets - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents, unrestricted		$ 58,120	$ 108,687
Restricted cash		4,000
Total cash, cash equivalents and restricted cash		62,120	108,687
Short-term investments		305,610	185,488
Total cash and cash equivalents, restricted cash and short-term investments		367,730	294,175
Student receivables, gross		76,300	84,874
Allowance for credit losses		(38,746)	(29,856)
Student receivables, net		37,554	55,018
Receivables, other		2,711	1,381
Prepaid expenses		7,825	7,299
Inventories		616	576
Other current assets		418	1,936
Total current assets		416,854	360,385
NON-CURRENT ASSETS:
Property and equipment, net of accumulated depreciation of $101,790 and $92,933 as of September 30, 2020 and December 31, 2019, respectively		28,808	26,006
Right of use asset, net		47,050	50,366
Goodwill		118,312	87,356
Intangible assets, net of amortization of $3,344 and $1,400 as of September 30, 2020 and December 31, 2019, respectively		16,356	7,900
Student receivables, gross		3,130	3,352
Allowance for credit losses		(1,975)	(2,108)
Student receivables, net		1,155	1,244
Deferred income tax assets, net		49,284	60,169
Other assets		5,932	5,720
TOTAL ASSETS	[1]	683,751	599,146
CURRENT LIABILITIES:
Lease liability-operating		11,013	11,784
Accounts payable		12,856	11,533
Accrued expenses:
Payroll and related benefits		19,350	27,616
Advertising and marketing costs		12,495	10,479
Income taxes		2,378	1,376
Other		11,100	16,378
Deferred revenue		29,303	24,647
Total current liabilities		98,495	103,813
NON-CURRENT LIABILITIES:
Lease liability-operating		46,273	52,391
Other liabilities		17,312	11,647
Total non-current liabilities		63,585	64,038
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; 86,488,095 and 85,953,253 shares issued, 69,286,959 and 70,151,357 shares outstanding as of September 30, 2020 and December 31, 2019, respectively		865	860
Additional paid-in capital		650,990	639,335
Accumulated other comprehensive income		603	344
Retained earnings		115,284	18,071
Treasury stock, at cost; 17,201,136 and 15,801,896 shares as of September 30, 2020 and December 31, 2019, respectively		(246,071)	(227,315)
Total stockholders' equity		521,671	431,295
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		$ 683,751	$ 599,146

[1] Total assets do not include intercompany receivable or payable activity between institutions and corporate and investments in subsidiaries.