Quarterly report pursuant to Section 13 or 15(d)

Inventories - Additional Information (Details)

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Inventories - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Inventory [Line Items]    
Inventory held for sale [1] $ 611,194 $ 645,812
Precious metals inventory subject to repurchase arrangements 200,700 181,800
Consignment arrangements with customers 2,500 3,800
Commemorative coin inventory, held at lower of cost or net realizable value 722 948
Product financing arrangement, restricted 389,600 335,800
Unrealized gains (losses) included in inventory balance (25,600) (4,600)
Premium on metals position 35,978 29,358
Inventories    
Inventory [Line Items]    
Borrowed precious metals from suppliers 21,700 21,600
Inventory held for Sale    
Inventory [Line Items]    
Inventory held for sale $ 385,613 $ 437,670
[1] Includes amounts of the consolidated variable interest entity, which are presented separately in the table below.