Restatement of Previously Issued Unaudited Financial Statements - Summary of Table Sets Forth the Effect of Consolidation and Correction of Errors on Condensed Consolidated Statement of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Error Corrections and Prior Period Adjustments Revision [Line Items]
Net income (loss)	$ (17,271)	$ 60,645	$ 78,325
Provision for doubtful accounts	15,305	10,654
Deferred income taxes	(15,384)	(4,224)
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
Restricted cash	(1,512)	(357)
Accounts receivable	(42,685)	(17,521)
PEAKS Trust student loans	1,187	0
Other operating assets and liabilities	(5,910)	23,636
Net cash flows from operating activities	(43,915)	35,984
As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Revision [Line Items]
Net income (loss)	31,130	61,071
Provision for doubtful accounts	19,885	15,601
Deferred income taxes	13,211	(3,742)
Accretion of discount on PEAKS Trust student loans	0
Accretion of discount on PEAKS Trust senior debt	0
Loss on consolidation of PEAKS Trust	0
Restricted cash	(118)	1,005
Accounts receivable	(46,649)	(21,906)
PEAKS Trust student loans	0
Other operating assets and liabilities	(10,693)	22,166
Net cash flows from operating activities	(43,418)	37,346
Consolidation of PEAKS Trust [Member]
Error Corrections and Prior Period Adjustments Revision [Line Items]
Net income (loss)	(48,571)
Provision for doubtful accounts	0
Deferred income taxes	(28,464)
Accretion of discount on PEAKS Trust student loans	(1,360)
Accretion of discount on PEAKS Trust senior debt	652
Loss on consolidation of PEAKS Trust	73,248
Restricted cash	(896)
Accounts receivable	0
PEAKS Trust student loans	1,187
Other operating assets and liabilities	5,360
Net cash flows from operating activities	0
Other Adjustments [Member]
Error Corrections and Prior Period Adjustments Revision [Line Items]
Net income (loss)	170
Provision for doubtful accounts	(4,580)
Deferred income taxes	(131)
Accretion of discount on PEAKS Trust student loans	0
Accretion of discount on PEAKS Trust senior debt	0
Loss on consolidation of PEAKS Trust	0
Restricted cash	(498)
Accounts receivable	3,964
PEAKS Trust student loans	0
Other operating assets and liabilities	(577)
Net cash flows from operating activities	$ (497)