CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income (loss)	$ (17,271)	$ 60,645
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation and amortization	7,292	7,420
Provision for doubtful accounts	15,305	10,654
Deferred income taxes	(15,384)	(4,224)
Excess tax benefit from stock option exercises	0	(805)
Stock-based compensation expense	3,093	4,483
Settlement cost	(46,000)	0
Accretion of discount on PEAKS Trust student loans	(1,360)	0
Accretion of discount on PEAKS Trust senior debt	652	0
Loss on consolidation of PEAKS Trust	73,248	0
Other	295	(339)
Changes in operating assets and liabilities:
Restricted cash	(1,512)	(357)
Accounts receivable	(42,685)	(17,521)
PEAKS Trust student loans	1,187	0
Accounts payable	409	(1,212)
Other operating assets and liabilities	(5,910)	23,636
Deferred revenue	(15,272)	(46,396)
Net cash flows from operating activities	(43,915)	35,984
Cash flows from investing activities:
Facility expenditures and land purchases	(100)	(132)
Capital expenditures, net	(1,418)	(4,518)
Proceeds from sales and maturities of investments and repayment of notes	215	98,955
Purchase of investments and note advances	(1,241)	(63,545)
Net cash flows from investing activities	(2,544)	30,760
Cash flows from financing activities:
Excess tax benefit from stock option exercises	0	805
Proceeds from exercise of stock options	0	4,668
Debt issue costs	0	(1,525)
Proceeds from revolving borrowings	10,000	175,000
Repayment of revolving borrowings	0	(150,000)
Repurchase of common stock and shares tendered for taxes	(368)	(147,571)
Net cash flows from financing activities	9,632	(118,623)
Net change in cash and cash equivalents	(36,827)	(51,879)
Cash and cash equivalents at beginning of period	243,465	223,849
Cash and cash equivalents at end of period	$ 206,638	$ 171,970