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Activity Related to Balances Outstanding Under Proprietary Loan Program (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended 15 Months Ended
Jun. 30, 2013
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Loans [Line Items]        
Balance at beginning of period   $ 42,880 $ 26,863  
Loans extended   15,930 14,396  
Interest accrued   2,686 2,103  
Amounts collected and recognized (601) (1,619) (1,139) (409)
Amounts written-off (1,646) (4,102) (5,559) (861)
Balance at end of period $ 55,775 $ 55,775 $ 36,664 $ 55,775