Quarterly report pursuant to Section 13 or 15(d)

Receivables (Components of Receivables and Secured Loans - Trading) (Details)

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Receivables (Components of Receivables and Secured Loans - Trading) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Jun. 30, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables and Secured Loans Gross - Trading Operations $ 83,356 $ 94,613
Subtotal 51,421 59,028
Less: allowance for doubtful accounts (30) (104)
Subtotal 83,326 94,509
Derivative assets — open purchase and sales commitments 3,293 0
Derivative assets — forward contracts 4,933 471
Derivative assets — futures contracts 10,921 14,967
Receivables, net 102,473 109,947
Customer trade receivables
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables and Secured Loans Gross - Trading Operations 30,185 38,405
Wholesale trade advances
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables and Secured Loans Gross - Trading Operations 12,327 20,623
Due from brokers
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables and Secured Loans Gross - Trading Operations 8,909 0
Secured loans
    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivables and Secured Loans Gross - Trading Operations $ 31,935 $ 35,585