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Accounting Policies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Jun. 30, 2013
Title IV Programs [Member]
Jun. 30, 2013
PEAKS Trust Student Loans [Member]
Loan
Feb. 28, 2013
PEAKS Trust Student Loans [Member]
Jun. 30, 2013
PEAKS Senior Debt [Member]
Jan. 31, 2010
PEAKS Senior Debt [Member]
Significant Accounting Policies [Line Items]                
Restricted cash in the variable interest entity $ 2,203              
Restricted cash 5,819 3,478 6,787 2,840 2,203 1,703    
Number of loan pools         24      
Aggregate principal amount of debt             $ 300,000 $ 300,000