Annual report pursuant to Section 13 and 15(d)

Goodwill and Intangible Assets - Additional Information (Details)

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Goodwill and Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Dec. 31, 2018
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Jun. 21, 2024
Mar. 31, 2024
Feb. 26, 2024
Oct. 31, 2022
Mar. 31, 2021
Aug. 31, 2017
Aug. 31, 2016
Finite-Lived Intangible Assets [Line Items]                      
Goodwill   $ 199,937 $ 100,943                
Amortization expense related to intangible assets   8,600 10,300 $ 25,700              
Goodwill and intangible asset impairment $ 2,700                    
Intangible assets   $ 101,663 $ 62,630                
JMB                      
Finite-Lived Intangible Assets [Line Items]                      
Percentage of investments in privately-held entities accounted under equity method                 20.50%    
Minimum                      
Finite-Lived Intangible Assets [Line Items]                      
Estimated useful lives of intangibles   1 year                  
Maximum                      
Finite-Lived Intangible Assets [Line Items]                      
Estimated useful lives of intangibles   15 years                  
SilverTowne Mint                      
Finite-Lived Intangible Assets [Line Items]                      
Intangibles acquired                     $ 2,500
Goodwill                     $ 4,300
Goldline, LLC                      
Finite-Lived Intangible Assets [Line Items]                      
Intangibles acquired                   $ 5,000  
Goodwill                   $ 1,400  
LPM                      
Finite-Lived Intangible Assets [Line Items]                      
Intangibles acquired             $ 10,300        
Goodwill             $ 21,034        
JMB                      
Finite-Lived Intangible Assets [Line Items]                      
Intangibles acquired                 $ 98,000    
Goodwill                 $ 92,100    
Intangible assets           $ 8,500   $ 4,500      
JMB | A Mark Precious Metals, Inc                      
Finite-Lived Intangible Assets [Line Items]                      
Percentage of ownership owned by parent                 100.00%    
SGB                      
Finite-Lived Intangible Assets [Line Items]                      
Intangibles acquired   $ 28,800                  
Goodwill   $ 78,000     $ 77,960