Quarterly report pursuant to Section 13 or 15(d)

Description of Business - Additional Information (Details)

v3.21.1
Description of Business - Additional Information (Details)
3 Months Ended 9 Months Ended
Mar. 19, 2021
USD ($)
shares
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2021
USD ($)
reportable_segments
Mar. 31, 2020
USD ($)
Apr. 01, 2021
USD ($)
Description Of Business [Line Items]            
Number of reportable segments | reportable_segments       3    
Remeasurement gain on pre-existing equity interest   $ 26,306,000   $ 26,306,000    
Revenues   2,049,489,000 $ 1,258,722,000 5,434,349,000 $ 3,795,326,000  
Pre-tax income   86,780,000 $ 13,422,000 128,797,000 $ 15,517,000  
JMB            
Description Of Business [Line Items]            
Business acquisition, percentage of interests acquired 79.50%          
Acquisition date Mar. 19, 2021          
Business combination, purchase price in acquisition of remaining percentage of ownership $ 141,700,000          
Business combination, cash consideration $ 100,100,000          
Common stock issued shares, acquisitions | shares 1,047,004          
Common stock issued value, acquisitions $ 41,600,000          
Transaction Costs $ 2,600,000          
Business acquisition estimated fair value pre-existing investment ownership interest percentage 20.50%          
Business acquisition pre-existing equity method investment $ 34,100,000          
Remeasurement gain on pre-existing equity interest 26,300,000          
Business combination, purchase price 175,800,000          
Goodwill expected to be deductible for tax purposes $ 3,900,000          
Number of days restriction on sale of transfer of shares after close of acquisition 270 days          
Revenues   68,400,000   68,400,000    
Pre-tax income   $ 6,800,000   $ 6,800,000    
JMB | Mr. Michael Wittmeyer            
Description Of Business [Line Items]            
Deferred compensation arrangement with individual, requisite service Jun. 30, 2024          
Subsequent Event | AM&ST Associates, LLC            
Description Of Business [Line Items]            
Business acquisition, percentage of interests acquired           30.90%
Business combination, cash consideration           $ 2,000,000
A Mark Precious Metals, Inc | JMB            
Description Of Business [Line Items]            
Percentage of ownership owned by parent   100.00%   100.00%    
A Mark Precious Metals, Inc | AM&ST Associates, LLC            
Description Of Business [Line Items]            
Percentage of ownership owned by parent   69.00%   69.00%    
A Mark Precious Metals, Inc | SilverTowne L.P. | AM&ST Associates, LLC            
Description Of Business [Line Items]            
Percentage of ownership owned by noncontrolling Owners   31.00%   31.00%    
A Mark Precious Metals, Inc | Subsequent Event | AM&ST Associates, LLC            
Description Of Business [Line Items]            
Business acquisition, percentage of interests acquired           31.00%
A Mark Precious Metals, Inc | Subsequent Event | AM&ST Associates, LLC            
Description Of Business [Line Items]            
Percentage of ownership owned by parent           100.00%
Precious Metals Purchasing Partners, LLC            
Description Of Business [Line Items]            
Percentage of ownership percentage       50.00%    
Revenues       $ 0