Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 171,600	$ 155,933
Tuition receivable, net	25,595	23,122
Income taxes receivable	5,592
Other current assets	11,385	11,293
Total current assets	214,172	190,348
Property and equipment, net	72,125	73,763
Deferred income taxes	22,851	24,452
Goodwill	17,919	20,744
Other assets	9,698	11,971
Total assets	336,765	321,278
Current liabilities:
Accounts payable and accrued expenses	46,657	46,177
Income taxes payable		1,038
Contract liabilities	22,547	21,851
Total current liabilities	69,204	69,066
Other long-term liabilities	43,721	43,015
Total liabilities	112,925	112,081
Commitments and contingencies
Stockholders' equity:
Common stock, par value $0.01; 20,000,000 shares authorized; 11,167,425 and 11,306,527 shares issued and outstanding at December 31, 2017 and June 30, 2018, respectively	113	112
Additional paid-in capital	53,015	47,079
Retained earnings	170,712	162,006
Total stockholders' equity	223,840	209,197
Total liabilities and stockholders' equity	$ 336,765	$ 321,278

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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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.