Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 276,382	$ 155,933
Marketable securities, current	38,139
Tuition receivable, net	52,527	23,122
Income taxes receivable	6,995
Other current assets	17,367	11,293
Total current assets	391,410	190,348
Property and equipment, net	124,613	73,763
Marketable securities, non-current	33,324
Deferred income taxes		24,452
Intangible assets, net	342,477	7,260
Goodwill	730,729	20,744
Other assets	23,143	4,711
Total assets	1,645,696	321,278
Current liabilities:
Accounts payable and accrued expenses	78,092	46,177
Income taxes payable		1,038
Contract liabilities	38,025	21,851
Total current liabilities	116,117	69,066
Deferred income tax liabilities	71,126
Other long-term liabilities	50,123	43,015
Total liabilities	237,366	112,081
Commitments and contingencies
Stockholders' equity:
Common stock, par value $0.01; 32,000,000 shares authorized; 11,167,425 and 21,707,599 shares issued and outstanding at December 31, 2017 and September 30, 2018, respectively	217	112
Additional paid-in capital	1,301,228	47,079
Accumulated other comprehensive income (loss)	(22)
Retained earnings	106,907	162,006
Total stockholders' equity	1,408,330	209,197
Total liabilities and stockholders' equity	$ 1,645,696	$ 321,278