Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Lines of Credit - Additional Information (Details)

v3.21.2
Financing Agreements - Lines of Credit - Additional Information (Details) - Line of Credit - USD ($)
3 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Jun. 30, 2021
Trading Credit Facility      
Debt Instrument [Line Items]      
Interest expense $ 2,000,000.0 $ 1,600,000  
Percentage of total expense recognized 36.30% 36.90%  
Effective rate of interest 3.55% 3.43%  
Revolving Credit Facility | LIBOR      
Debt Instrument [Line Items]      
Variable rate 2.50%    
A-Mark | Trading Credit Facility      
Debt Instrument [Line Items]      
Line of credit facility, maximum borrowing capacity $ 330,000,000.0    
Line of credit, current borrowing capacity 280,000,000.0    
Line of credit, accordion option 50,000,000.0    
Accumulated amortization of loan cost $ 800,000   $ 900,000
Variable rate basis one-month LIBOR    
Credit facility, interest rate at period end 0.08%   0.10%
Borrowings due on demand $ 194,000,000.0   $ 185,000,000.0
Borrowings available $ 84,500,000   $ 65,400,000