Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended		12 Months Ended
	Jan. 31, 2013	Mar. 26, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loss Contingencies [Line Items]
Face amount of surety bonds			$ 19,300
Issued letters of credit to workers compensation insurers			2,246
Amount claimed as offset against note receivable			9,091
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			11,000
Range of possible losses greater than portion accrued			28,000
Litigation Settlement award		395
Expiration period of operating lease obligation			10 years
Rent expense under operating leases			53,212	50,817	47,833
Expected to Recover guarantee Amount				12,342
Guarantee payment expected net of accrued discount				5,674
Additional payments expected in 2018			75,194
Discount on guarantee regular payments and recoveries			9,015
Collateral maintained with bank for education loan			8,600	8,600
Increase in collateral maintained in restricted bank account			2,600
Offset amounts relating to guarantee obligations			9,091
Amounts relating to discharge payments			6,786
Recoveries from charged-off loans			574
Credit facility outstanding, amount			8,200
Payments on Behalf of Borrowers			11,499	2,762
Payable in 2018 through 2027 [Member]
Loss Contingencies [Line Items]
Estimated regular payment made			97,400
Payable 2023 through 2027 [Member]
Loss Contingencies [Line Items]
Estimated regular payment made			16,600
2009 Entity [Member]
Loss Contingencies [Line Items]
Offset amounts relating to guarantee obligations			9,091
Recoveries from charged-off loans			500
Payments on Behalf of Borrowers			8,600
Minimum [Member]
Loss Contingencies [Line Items]
Operating leases renewal option period, years			1 year
Maximum allowable percentage of Title IV programs			75.00%
Minimum [Member] | Payable 2018 through 2022 [Member]
Loss Contingencies [Line Items]
Estimated regular payment made			15,100
Maximum [Member]
Loss Contingencies [Line Items]
Operating leases renewal option period, years			5 years
Maximum allowable percentage of Title IV programs			90.00%
Maximum [Member] | Payable 2018 through 2022 [Member]
Loss Contingencies [Line Items]
Estimated regular payment made			16,400
Education Loan Under 2009 Loan Program [Member]
Loss Contingencies [Line Items]
Principal amount for private education loans			$ 141,000
Obligation repayment term (in Years)			10 years