Unaudited Condensed Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
REVENUE:
Total revenue		$ 157,853	$ 148,065
OPERATING EXPENSES:
Educational services and facilities		26,327	26,946
General and administrative		99,322	98,008
Depreciation and amortization		2,233	2,582
Total operating expenses		127,882	127,536
Operating income		29,971	20,529
OTHER INCOME:
Interest income		1,440	634
Interest expense		(42)	(109)
Miscellaneous income		226	328
Total other income		1,624	853
PRETAX INCOME		31,595	21,382
Provision for income taxes		6,407	3,498
INCOME FROM CONTINUING OPERATIONS		25,188	17,884
LOSS FROM DISCONTINUED OPERATIONS, net of tax		(397)	(382)
NET INCOME		24,791	17,502
OTHER COMPREHENSIVE INCOME (LOSS), net of tax:
Foreign currency translation adjustments		(52)	86
Unrealized gain (loss) on investments		399	(218)
Total other comprehensive income (loss)		347	(132)
COMPREHENSIVE INCOME		$ 25,138	$ 17,370
NET INCOME (LOSS) PER SHARE - BASIC:
Income from continuing operations		$ 0.36	$ 0.26
Loss from discontinued operations		(0.01)	(0.01)
Net income per share		0.35	0.25
NET INCOME (LOSS) PER SHARE - DILUTED:
Income from continuing operations		0.35	0.25
Net income per share		$ 0.35	$ 0.25
WEIGHTED AVERAGE SHARES OUTSTANDING:
Basic		69,837	69,216
Diluted		71,492	71,119
Tuition and Fees [Member]
REVENUE:
Total revenue		$ 157,228	$ 147,510
Other [Member]
REVENUE:
Total revenue	[1]	$ 625	$ 555

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