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Intangible Assets And Goodwill (Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Aug. 31, 2012
Aug. 31, 2011
Intangible Assets And Goodwill [Line Items]    
Definite-lived intangible assets, gross carrying amount $ 100,772 $ 100,773
Definite-lived intangible assets, accumulated amortization (64,567) (62,070)
Finite-lived intangible assets, net carrying amount 36,205 38,703
Intangible assets, gross carrying amount 123,772 123,773
Intangible assets, accumulated amortization (64,567) (62,070)
Intangible assets, net carrying amount 59,205 61,703
Trade Names [Member]
    
Intangible Assets And Goodwill [Line Items]    
Covey trade name 23,000 23,000
License Rights [Member]
    
Intangible Assets And Goodwill [Line Items]    
Definite-lived intangible assets, gross carrying amount 27,000 27,000
Definite-lived intangible assets, accumulated amortization (13,041) (12,103)
Finite-lived intangible assets, net carrying amount 13,959 14,897
Acquired Curriculum [Member]
    
Intangible Assets And Goodwill [Line Items]    
Definite-lived intangible assets, gross carrying amount 58,284 58,285
Definite-lived intangible assets, accumulated amortization (36,052) (34,524)
Finite-lived intangible assets, net carrying amount 22,232 23,761
Customer Lists [Member]
    
Intangible Assets And Goodwill [Line Items]    
Definite-lived intangible assets, gross carrying amount 15,111 15,111
Definite-lived intangible assets, accumulated amortization (15,097) (15,066)
Finite-lived intangible assets, net carrying amount 14 45
Trade Names [Member]
    
Intangible Assets And Goodwill [Line Items]    
Definite-lived intangible assets, gross carrying amount 377 377
Definite-lived intangible assets, accumulated amortization $ (377) $ (377)