Quarterly report pursuant to Section 13 or 15(d)

Inventories - Additional Information (Details)

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Inventories - Additional Information (Details) - USD ($)
6 Months Ended 12 Months Ended
Dec. 31, 2021
Jun. 30, 2021
Inventory [Line Items]    
Inventory held for sale [1] $ 402,565,000 $ 256,991,000
Precious metals inventory subject to repurchase arrangements 95,600,000 75,100,000
Consignment arrangements with customers 1,400,000 1,300,000
Commemorative coin inventory, held at lower of cost or net realizable value 886,000 406,000
Product financing arrangement, restricted 155,800,000 201,000,000.0
Unrealized gains (losses) included in inventory balance 4,700,000 (5,600,000)
Premium on metals position 19,209,000 11,017,000
Inventories    
Inventory [Line Items]    
Borrowed precious metals from suppliers 19,400,000 20,900,000
Inventory held for Sale    
Inventory [Line Items]    
Inventory held for sale $ 285,275,000 $ 159,319,000
[1] Includes amounts of the consolidated variable interest entity, which is presented separately in the table below.