Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 352,387	$ 311,732
Marketable securities, current	36,486	37,121
Tuition receivable, net	50,842	55,694
Other current assets	16,874	15,814
Total current assets	456,589	420,361
Property and equipment, net	119,040	122,677
Right-of-use lease assets	101,533
Marketable securities, non-current	31,866	37,678
Intangible assets, net	314,511	328,344
Goodwill	732,799	732,540
Other assets	19,052	19,429
Total assets	1,775,390	1,661,029
Current liabilities:
Accounts payable and accrued expenses	80,085	85,979
Income taxes payable	6,144	419
Contract liabilities	40,826	38,733
Lease liabilities, current	26,462
Total current liabilities	153,517	125,131
Deferred income tax liabilities	70,298	59,358
Lease liabilities, non-current	90,501
Other long-term liabilities	37,636	51,316
Total liabilities	351,952	235,805
Commitments and contingencies
Stockholders’ equity:
Common stock, par value $0.01; 32,000,000 shares authorized; 21,743,498 and 21,923,800 shares issued and outstanding at December 31, 2018 and March 31, 2019, respectively	219	217
Additional paid-in capital	1,304,170	1,306,653
Accumulated other comprehensive income	266	32
Retained earnings	118,783	118,322
Total stockholders’ equity	1,423,438	1,425,224
Total liabilities and stockholders’ equity	$ 1,775,390	$ 1,661,029