A-Mark Precious Metals, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Derivative Instruments and Hedging Transactions - Summary of Hedging Activities Shows Precious Metal Commodity Inventory Position Net of Open Sale and Purchase Commitments (Details)

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	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024
Derivatives, Fair Value [Line Items]
Inventories	$ 1,279,545		$ 1,097,144
Precious metals held under financing arrangements	0		22,066
Inventory and precious metals held under financing arrangements	1,279,545		1,119,210
Collectible coin inventory, held at lower of cost or net realizable value	(68,193)		(3,236)
Premium on metals position	(35,295)	$ (35,300)	(34,175)
Precious metal value not hedged	(103,488)		(37,411)
Commitments at market:
Open inventory purchase commitments	1,149,622		817,900
Open inventory sales commitments	(521,442)		(388,184)
Margin sales commitments	(27,446)		(22,316)
In-transit inventory no longer subject to market risk	(18,801)		(21,715)
Unhedgeable premiums on open commitment positions	10,345		10,986
Borrowed precious metals	(46,051)		(31,993)
Product financing arrangements	(484,733)		(517,744)
Advances on industrial metals	584		394
Commitments at market	62,078		(152,672)
Precious metal subject to price risk	1,238,135		929,127
Precious metal subject to derivative financial instruments:
Market value of derivative financial instruments	1,238,635		926,653
Net precious metals subject to commodity price risk	(500)		2,474
Precious metals forward contracts at market values
Precious metal subject to derivative financial instruments:
Market value of derivative financial instruments	927,990		843,439
Precious metals futures contracts at market values
Precious metal subject to derivative financial instruments:
Market value of derivative financial instruments	$ 310,645		$ 83,214