Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended		3 Months Ended			12 Months Ended	3 Months Ended
	Jan. 31, 2013	Mar. 26, 2012	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2012 PEAKS Guarantee [Member]	Mar. 31, 2013 2009 Entity [Member]	Mar. 31, 2013 Education Loan Under 2009 Loan Program [Member]	Mar. 31, 2013 Revolving Note [Member]	Apr. 30, 2013 Subsequent Event [Member]
Loss Contingencies [Line Items]
Face amount of surety bonds			$ 24,000
Letters of credit issued			2,246
Amount included in Other current liabilities offset against receivable under Revolving Note									538
Payment under settlement agreement	46,000
Life of private education loan made under RSAs			10 years
Range of possible losses less than amount accrued			1,000
Range of possible losses greater than portion accrued			14,000
Litigation settlement amount		395
Guarantee payment expected net of accrued discount					5,674
Guarantee payments expected recovery						12,342
Principal amount for private education loans								141,000
Recoveries from charged-off loans			54				500
Credit facility outstanding, amount									8,200
Collateral maintained with bank for education loan										8,600
Payments on Behalf of Borrowers			$ 1,855	$ 0			$ 8,600