Inventories - Summary of Components of Inventory (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Jun. 30, 2025 |
||
|---|---|---|---|---|
| Inventory [Line Items] | ||||
| Inventories | $ 1,561,851 | $ 794,812 | ||
| Restricted inventories | 798,485 | 484,733 | ||
| Restricted and non-restricted inventory, net | 2,360,336 | 1,279,545 | ||
| Inventory held for Sale | ||||
| Inventory [Line Items] | ||||
| Inventories | 1,203,496 | 558,024 | ||
| Repurchase Arrangements with Customers | ||||
| Inventory [Line Items] | ||||
| Inventories | 156,161 | 116,546 | ||
| Consignment Arrangements with Customers | ||||
| Inventory [Line Items] | ||||
| Inventories | 44,030 | 5,998 | ||
| Collectible Coins, Held at Lower of Cost or Net Realizable Value | ||||
| Inventory [Line Items] | ||||
| Inventories | 91,339 | 68,193 | ||
| Borrowed Precious Metals | ||||
| Inventory [Line Items] | ||||
| Inventories | [1] | 776,061 | 46,051 | |
| Restricted inventories | 709,200 | 0 | ||
| Product Financing Arrangements | ||||
| Inventory [Line Items] | ||||
| Restricted inventories | $ 89,249 | $ 484,733 | ||
| ||||