Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 44,879	$ 153,474
Restricted cash and cash equivalents	61,667	94,534
Investments	68,754	89,271
Accounts receivable, net	65,120	10,908
Interest receivable on secured note	4,381
Income tax receivable	1,791	2,086
Other current assets	8,607	24,589
Total current assets	255,199	374,862
Property and equipment, net	110,908	922,284
Note receivable	882,900
Prepaid royalties		2,763
Goodwill	2,941	2,941
Other assets	743	723
Total assets	1,252,691	1,303,573
Current liabilities
Accounts payable	16,996	29,139
Accrued compensation and benefits	17,857	23,173
Accrued liabilities	13,511	20,757
Income taxes payable		16,182
Student deposits		95,298
Deferred revenue		46,895
Current portion of notes payable	6,572	6,691
Total current liabilities	54,936	238,135
Other noncurrent liabilities		1,200
Deferred income taxes, noncurrent	4,421	18,362
Notes payable, less current portion	54,976	59,925
Total liabilities	114,333	317,622
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.01 par value, 10,000 shares authorized; 0 shares issued and outstanding at September 30, 2018 and December 31, 2017
Common stock, $0.01 par value, 100,000 shares authorized; 52,570 and 52,277 shares issued and 48,134 and 48,125 shares outstanding at September 30, 2018 and December 31, 2017, respectively	526	523
Treasury stock, at cost, 4,436 and 4,152 shares of common stock at September 30, 2018 and December 31, 2017, respectively	(119,982)	(100,694)
Additional paid-in capital	251,828	232,670
Accumulated other comprehensive loss	(652)	(724)
Retained earnings	1,006,638	854,176
Total stockholders' equity	1,138,358	985,951
Total liabilities and stockholders' equity	$ 1,252,691	$ 1,303,573