Inventories - Additional Information (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Mar. 31, 2025 |
|
| Inventory [Line Items] | |||
| Inventory held for sale | $ 794,812 | $ 579,400 | |
| Precious metals inventory subject to repurchase arrangements | 116,500 | 199,600 | |
| Consignment arrangements with customers | 6,000 | 2,400 | |
| Collectible coin inventory, held at lower of cost or net realizable value | 68,193 | 3,236 | |
| Product financing arrangement, restricted | 484,700 | 517,700 | |
| Unrealized gains (losses) included in inventory balance | 94,800 | 55,500 | |
| Premium on metals position | 35,295 | 34,175 | $ 35,300 |
| Inventories | |||
| Inventory [Line Items] | |||
| Borrowed precious metals from suppliers | 46,100 | 32,000 | |
| Inventory held for Sale | |||
| Inventory [Line Items] | |||
| Inventory held for sale | $ 558,024 | $ 342,196 | |