Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 45,976	$ 23,036
Restricted cash, cash equivalents and investments	84,931	75,384
Investments	62,596	83,364
Accounts receivable, net	9,999	8,298
Income taxes receivable	4,686	3,952
Other current assets	21,880	20,863
Total current assets	230,068	214,897
Property and equipment, net	855,528	667,483
Prepaid royalties	3,059	3,355
Goodwill	2,941	2,941
Other assets	897	3,306
Total assets	1,092,493	891,982
Current liabilities
Accounts payable	24,824	34,149
Accrued compensation and benefits	19,697	17,895
Accrued liabilities	21,163	13,846
Income taxes payable	2,734	29
Student deposits	85,881	76,742
Deferred revenue	40,739	37,876
Due to related parties	120	675
Current portion of capital lease obligations		697
Current portion of notes payable	31,636	6,625
Total current liabilities	226,794	188,534
Capital lease obligations, less current portion		788
Other noncurrent liabilities	1,689	4,302
Deferred income taxes, non-current	23,708	14,855
Notes payable, less current portion	66,616	73,252
Total liabilities	318,807	281,731
Commitments and contingencies
Stockholders' equity
Preferred stock, $0.01 par value, 10,000 shares authorized; 0 shares issued and outstanding at December 31, 2016 and 2015
Common stock, $0.01 par value, 100,000 shares authorized; 51,509 and 50,288 shares issued and 47,559 and 46,877 shares outstanding at December 31, 2016 and 2015, respectively	515	503
Treasury stock, at cost, 3,950 and 3,411 shares of common stock at December 31, 2016 and 2015, respectively	(89,394)	(69,332)
Additional paid-in capital	212,559	177,167
Accumulated other comprehensive loss	(910)	(489)
Retained earnings	650,916	502,402
Total stockholders' equity	773,686	610,251
Total liabilities and stockholders' equity	$ 1,092,493	$ 891,982