v2.4.0.6
Accounting Policies (Details) (USD $)
Nov. 30, 2011
Feb. 28, 2011
Accounting Policies [Abstract]    
Cash equivalents $ 372,200,000 $ 23,900,000
Restricted cash from collections on auto loan receivables 174,392,000 161,052,000
Restricted cash on deposit in reserve accounts 41,500,000 45,000,000
Restricted investments $ 30,800,000 $ 26,700,000