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Goodwill and Other Intangible Assets - Schedule of Cost Basis, Accumulated Amortization Net Book Value of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Intangible Assets Net Excluding Goodwill [Line Items]    
Cost $ 14,985 $ 21,805
Accumulated Amortization (12,221) (17,483)
Net Book Value of Amortizable intangible assets, net 2,764 4,322
Non-amortizable intangible assets 58,917 71,964
Intangible assets, net 61,681 76,286
Accreditation Rights [Member]
    
Intangible Assets Net Excluding Goodwill [Line Items]    
Cost   6,812
Accumulated Amortization   (6,812)
Courseware [Member]
    
Intangible Assets Net Excluding Goodwill [Line Items]    
Cost 14,606 14,569
Accumulated Amortization (11,937) (10,394)
Net Book Value of Amortizable intangible assets, net 2,669 4,175
Other [Member]
    
Intangible Assets Net Excluding Goodwill [Line Items]    
Cost 379 424
Accumulated Amortization (284) (277)
Net Book Value of Amortizable intangible assets, net 95 147
Accreditation, Licensing, And Title IV Program Participation Rights [Member]
    
Intangible Assets Net Excluding Goodwill [Line Items]    
Non-amortizable intangible assets 1,719 1,706
Trade Names [Member]
    
Intangible Assets Net Excluding Goodwill [Line Items]    
Non-amortizable intangible assets $ 57,198 $ 70,258