Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 117,498	$ 106,889
Tuition receivable, net	18,613	18,519
Other current assets	8,383	6,944
Total current assets	144,494	132,352
Property and equipment, net	74,954	77,139
Deferred income taxes	22,930	26,449
Goodwill	21,042	6,800
Other assets	14,276	5,694
Total assets	277,696	248,434
Current liabilities:
Accounts payable and accrued expenses	38,108	42,253
Income taxes payable	7,231	2,684
Deferred revenue	16,868	12,373
Other current liabilities	281	281
Total current liabilities	62,488	57,591
Other long-term liabilities	57,091	47,987
Total liabilities	$ 119,579	$ 105,578
Commitments and contingencies
Stockholders' equity:
Common stock, par value $0.01; 20,000,000 shares authorized; 11,027,177 and 11,153,979 shares issued and outstanding at December 31, 2015 and March 31, 2016, respectively	$ 112	$ 110
Additional paid-in capital	27,577	24,738
Retained earnings	130,428	118,008
Total stockholders' equity	158,117	142,856
Total liabilities and stockholders' equity	$ 277,696	$ 248,434

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.