Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 150,483	$ 129,245
Tuition receivable, net	20,626	20,532
Income taxes receivable	2,734
Other current assets	12,917	10,766
Total current assets	186,760	160,543
Property and equipment, net	74,335	73,124
Deferred income taxes	34,609	31,096
Goodwill	20,744	20,744
Other assets	12,127	13,189
Total assets	328,575	298,696
Current liabilities:
Accounts payable and accrued expenses	50,514	41,132
Income taxes payable		1,883
Deferred revenue	21,784	16,691
Other current liabilities		133
Total current liabilities	72,298	59,839
Other long-term liabilities	40,788	50,483
Total liabilities	113,086	110,322
Commitments and contingencies
Stockholders' equity:
Common stock, par value $0.01; 20,000,000 shares authorized; 11,093,489 and 11,167,425 shares issued and outstanding at December 31, 2016 and September 30, 2017, respectively	112	111
Additional paid-in capital	44,021	35,453
Retained earnings	171,356	152,810
Total stockholders' equity	215,489	188,374
Total liabilities and stockholders' equity	$ 328,575	$ 298,696

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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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.