v3.26.3
Derivative Instruments and Hedging Transactions - Summary of Hedging Activities Shows Precious Metal Commodity Inventory Position Net of Open Sale and Purchase Commitments (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Jun. 30, 2026
Jun. 30, 2025
Derivatives, Fair Value [Line Items]      
Inventories $ 2,436,180 $ 2,360,336  
Collectible coin inventory, held at lower of cost or net realizable value (104,512) (91,339)  
Minting & Refining inventory, held at lower of cost or net realizable value (14,270) 0  
Premium on metals position (12,835) (11,245) $ (11,200)
Precious metal value not hedged (131,617) (102,584)  
Commitments at market:      
Open inventory purchase commitments 1,343,744 1,463,181  
Open inventory sales commitments (1,792,397) (2,659,026)  
Margin sales commitments (31,068) (30,480)  
In-transit inventory no longer subject to market risk (12,830) (23,934)  
Unhedgeable premiums on open commitment positions 1,733 1,885  
Borrowed precious metals (793,783) (776,061)  
Product financing arrangements (314,900) (89,249)  
Advances on industrial metals 727 1,248  
Commitments at market (1,598,774) (2,112,436)  
Precious metals inventory subject to price risk 705,789 145,316  
Precious metals subject to derivative financial instruments:      
Market value of derivative financial instruments 700,276 140,445  
Net precious metals inventory subject to commodity price risk 5,513 4,871  
Precious metals forward contracts at market values      
Precious metals subject to derivative financial instruments:      
Market value of derivative financial instruments 73,034 (407,606)  
Precious metals futures contracts at market values      
Precious metals subject to derivative financial instruments:      
Market value of derivative financial instruments $ 627,242 $ 548,051