Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating activities
Net income	$ 8,793	$ 10,436
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,589	3,889
Stock-based compensation	1,394	1,156
Investment loss	38	43
Deferred income taxes	632	486
Other	25	35
Changes in operating assets and liabilities:
Accounts receivable, net of allowance for bad debt	(3,111)	(3,826)
Prepaid expenses and other assets	(800)	(1,071)
Income tax receivable	82	3,215
Accounts payable	(4,778)	848
Accrued liabilities	346	(6,340)
Income taxes payable		1,928
Deferred revenue and student deposits	(64)	1,650
Net cash provided by operating activities	7,146	12,449
Investing activities
Capital expenditures	(5,288)	(4,612)
Equity investment		(120)
Note receivable		(380)
Capitalized program development costs and other assets	(138)	(128)
Net cash used in investing activities	(5,426)	(5,240)
Financing activities
Cash paid for repurchase of common stock	(4,668)	(2,647)
Cash received from issuance of common stock		45
Excess (tax)/tax benefit from stock-based compensation	(349)	253
Net cash used in financing activities	(5,017)	(2,349)
Net increase/(decrease) in cash and cash equivalents	(3,297)	4,860
Cash and cash equivalents at beginning of period	115,634	94,820
Cash and cash equivalents at end of period	112,337	99,680
Supplemental disclosure of cash flow information
Income taxes paid	$ 5,285	$ 412