Quarterly report pursuant to Section 13 or 15(d)

Receivables (Narrative) (Details)

v2.4.0.8
Receivables (Narrative) (Details) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended 3 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended
Mar. 31, 2014
class
Sep. 30, 2013
Mar. 31, 2014
Mar. 31, 2013
Jun. 30, 2013
Sep. 27, 2013
Mar. 31, 2014
Minimum
Mar. 31, 2014
Maximum
Jun. 30, 2013
Maximum
Dec. 31, 2011
A-Mark
Dec. 30, 2012
A-Mark
Oct. 31, 2011
A-Mark
Sep. 27, 2013
Collateral Finance Corporation
Dec. 31, 2012
Due From M.F. Global, Inc. Trustee
A-Mark
Mar. 31, 2013
Due From M.F. Global, Inc. Trustee
A-Mark
Jul. 31, 2012
Due From M.F. Global, Inc. Trustee
A-Mark
Dec. 31, 2011
Due From M.F. Global, Inc. Trustee
A-Mark
Jul. 31, 2012
Receivables and Secured Loans, Gross - Trading Operations
A-Mark
Accounts, Notes, Loans and Financing Receivable [Line Items]                                    
Loans receivable average effective rate of interest (percentage)     8.30%   8.00%                          
Commodities account segregated balance amount held by broker at bankruptcy                       $ 20,300,000            
Commodities amount segregated amount returned subsequent to broker bankruptcy                   14,600,000                
Commodities account segregated percentage returned subsequent to broker bankruptcy                   72.00%                
Receivables and secured loans gross 63,818,000   63,818,000   94,613,000                     4,100,000 5,700,000  
Proceeds from bankruptcy claims                                   1,600,000
Proceeds from sale of other receivables                           3,800,000 3,800,000      
Allowance for doubtful other receivables, current                     1,000,000              
Allowance for doubtful accounts receivable, recoveries       700,000                            
Payments to acquire loans receivable                         350,000          
Short term loan receivable           12,800,000                        
Option to extend maturity   180 days                                
Repayments of debt 2,300,000   2,300,000                              
Amortization of debt discount 100,000   100,000                              
Classes of receivables 2                                  
Impaired loans $ 0   $ 0   $ 70,000                          
Loans receivable payment terms for interest     30 days                              
Delinquent period 30 days   30 days                              
Loan receivable liquidation period post default 90 days   90 days                              
Credit quality indicator loan-to-value threshold percentage             75.00%                      
Secured loans-to-value percentage               100.00% 100.00%