Inventories - Additional Information (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Dec. 31, 2025 |
Jun. 30, 2025 |
|
| Inventory [Line Items] | ||
| Inventory held for sale | $ 1,031,156 | $ 794,812 |
| Precious metals inventory subject to repurchase arrangements | 94,700 | 116,500 |
| Consignment arrangements with customers | 4,200 | 6,000 |
| Collectible coin inventory, held at lower of cost or net realizable value | 76,096 | 68,193 |
| Product financing arrangement, restricted | 504,600 | 484,700 |
| Unrealized gains (losses) included in inventory balance | 187,400 | 94,800 |
| Premium on metals position | 20,816 | 35,295 |
| Inventories | ||
| Inventory [Line Items] | ||
| Borrowed precious metals from suppliers | 85,600 | 46,100 |
| Inventory held for Sale | ||
| Inventory [Line Items] | ||
| Inventory held for sale | $ 770,526 | $ 558,024 |