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Accounting Policies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Mar. 31, 2013
PEAKS Senior Debt [Member]
Jan. 31, 2010
PEAKS Senior Debt [Member]
Mar. 31, 2013
PEAKS Trust Student Loans [Member]
Loan
Feb. 28, 2013
PEAKS Trust Student Loans [Member]
Mar. 31, 2013
Title IV Programs [Member]
Significant Accounting Policies [Line Items]                
Restricted cash in the variable interest entity $ 2,600              
Restricted cash 6,693 3,478 7,629     2,600 1,703 3,374
Number of loan pools           24    
Aggregate principal amount of debt       $ 300,000 $ 300,000