Unaudited Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
REVENUE:
Total revenue		$ 154,959	$ 145,690	$ 469,253	$ 435,791
OPERATING EXPENSES:
Educational services and facilities		25,318	27,201	76,995	84,437
General and administrative		103,063	96,842	331,057	293,190
Depreciation and amortization		2,284	2,364	6,752	7,049
Total operating expenses		130,665	126,407	414,804	384,676
Operating income		24,294	19,283	54,449	51,115
OTHER INCOME:
Interest income		1,698	950	4,730	2,326
Interest expense		(43)	(108)	(125)	(323)
Miscellaneous income		97	32	368	225
Total other income		1,752	874	4,973	2,228
PRETAX INCOME		26,046	20,157	59,422	53,343
Provision for income taxes		7,653	5,089	16,362	11,527
INCOME FROM CONTINUING OPERATIONS		18,393	15,068	43,060	41,816
LOSS FROM DISCONTINUED OPERATIONS, net of tax		(159)	(211)	(594)	(706)
NET INCOME		18,234	14,857	42,466	41,110
OTHER COMPREHENSIVE (LOSS) INCOME, net of tax:
Foreign currency translation adjustments		(113)	(21)	(130)	(103)
Unrealized gain (loss) on investments		44	106	814	(4)
Total other comprehensive (loss) income		(69)	85	684	(107)
COMPREHENSIVE INCOME		$ 18,165	$ 14,942	$ 43,150	$ 41,003
NET INCOME (LOSS) PER SHARE - BASIC:
Income from continuing operations		$ 0.26	$ 0.21	$ 0.62	$ 0.60
Loss from discontinued operations				(0.01)	(0.01)
Net income per share		0.26	0.21	0.61	0.59
NET INCOME (LOSS) PER SHARE - DILUTED:
Income from continuing operations		0.25	0.21	0.60	0.59
Loss from discontinued operations				(0.01)	(0.01)
Net income per share		$ 0.25	$ 0.21	$ 0.59	$ 0.58
WEIGHTED AVERAGE SHARES OUTSTANDING:
Basic		70,142	69,737	70,029	69,542
Diluted		72,142	71,790	71,901	71,425
Tuition and Fees [Member]
REVENUE:
Total revenue		$ 154,291	$ 144,882	$ 467,298	$ 433,736
Other [Member]
REVENUE:
Total revenue	[1]	$ 668	$ 808	$ 1,955	$ 2,055

[1] Other revenue primarily includes contract training revenue and bookstore and laptop sales.