Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenue	$ 83,966	$ 85,444
Costs and expenses:
Instructional costs and services	29,708	30,260
Selling and promotional	16,469	17,019
General and administrative	16,930	19,105
Depreciation and amortization	4,889	4,589
Total costs and expenses	67,996	70,973
Income from operations before interest income and income taxes	15,970	14,471
Interest income	37	10
Income before income taxes	16,007	14,481
Income tax expense	6,267	5,650
Equity investment income/(loss)	600	(38)
Net income	$ 10,340	$ 8,793
Net Income per common share:
Basic (in dollars per share)	$ 0.64	$ 0.51
Diluted (in dollars per share)	$ 0.64	$ 0.51
Weighted average number of common shares:
Basic (in shares)	16,038,243	17,183,952
Diluted (in shares)	16,171,424	17,353,529