Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Liability on Borrowed Metals - Additional Information (Details)

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Financing Agreements - Liability on Borrowed Metals - Additional Information (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Jun. 30, 2021
Liabilities On Borrowed Metals [Line Items]    
Liabilities on borrowed metals $ 74,618 $ 91,866
Precious Metals Held Under Financing Arrangements    
Liabilities On Borrowed Metals [Line Items]    
Borrowed precious metals from suppliers 56,400 71,000
Inventories    
Liabilities On Borrowed Metals [Line Items]    
Borrowed precious metals from suppliers $ 18,200 $ 20,900