Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2013	Mar. 26, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Apr. 30, 2013
Loss Contingencies [Line Items]
Face amount of surety bonds			$ 24,000		$ 24,000
Issued letters of credit to workers compensation insurers			2,246		2,246
Amount claimed as offset against note receivable			8,114		8,114
Number of years represented losses realized					10 years
Payment under settlement agreement	46,000
Life of private education loan made under RSAs					10 years
Range of possible losses less than amount accrued			0		0
Range of possible losses greater than portion accrued			0		0
Litigation Settlement award		395
Guarantee payment expected net of accrued discount							5,674
Expected to Recover guarantee Amount							12,342
Collateral maintained with bank for education loan			8,600	8,600	8,600	8,600	8,600	8,600
Increase in collateral maintained in restricted bank account					2,600
Amounts relating to discharge payments			6,786		6,786
Recoveries from charged-off loans			173		227
Credit facility outstanding, amount			8,200		8,200
Payments on Behalf of Borrowers			3,290	0	5,145	0
2009 Entity [Member]
Loss Contingencies [Line Items]
Amount offset against 2009 Entity under the Revolving Note			7,577		8,114
Recoveries from charged-off loans					500
Payments on Behalf of Borrowers					8,600
Minimum [Member]
Loss Contingencies [Line Items]
Maximum allowable percentage of Title IV programs					75.00%
Maximum [Member]
Loss Contingencies [Line Items]
Maximum allowable percentage of Title IV programs					90.00%
Education Loan Under 2009 Loan Program [Member]
Loss Contingencies [Line Items]
Principal amount for private education loans			$ 141,000		$ 141,000
Obligation repayment term (in Years)					10 years