Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Details)

v3.21.2
Subsequent Events - Additional Information (Details) - USD ($)
12 Months Ended
Aug. 30, 2021
Aug. 27, 2021
Jul. 16, 2021
Oct. 29, 2020
Sep. 03, 2020
Jun. 30, 2021
Subsequent Event [Line Items]            
Dividends declared, date       Oct. 29, 2020 Sep. 03, 2020  
Dividends declared, per common share       $ 1.50 $ 1.50 $ 1.50
Dividends payable, date of record       Nov. 23, 2020 Sep. 21, 2020  
Dividends paid           $ 21,200,000
Subsequent Event            
Subsequent Event [Line Items]            
Dividends declared, date Aug. 30, 2021          
Dividends declared, per common share $ 2.00          
Dividends payable, date of record Sep. 20, 2021          
Dividends payable date Sep. 24, 2021          
Dividends paid $ 22,600,000          
Subsequent Event | Pinehurst            
Subsequent Event [Line Items]            
Acquisition date   Aug. 27, 2021        
Ownership interest percentage before transaction   10.00%        
Ownership interest percentage after transaction   49.00%        
Business combination, total purchase consideration   $ 9,750,000        
Purchase price of cash   $ 6,750,000        
Common stock issued shares, acquisitions   61,590        
Exclusive supplier agreement extended period   5 years        
Exclusive supplier agreement expiration year   2029-01        
Line of Credit | A-Mark | Trading Credit Facility            
Subsequent Event [Line Items]            
Line of credit facility, maximum borrowing capacity           270,000,000.0
Line of credit, current borrowing capacity           220,000,000.0
Line of credit, accordion option           $ 50,000,000.0
Line of Credit | A-Mark | Subsequent Event | Trading Credit Facility            
Subsequent Event [Line Items]            
Line of credit facility, maximum borrowing capacity     $ 330,000,000      
Line of credit, current borrowing capacity     280,000,000.0      
Line of credit, accordion option     $ 50,000,000      
Line of credit facility, expiration date     Mar. 25, 2022