Annual report pursuant to Section 13 and 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
Jun. 30, 2021
Jun. 30, 2020
Liabilities On Borrowed Metals [Line Items]    
Liabilities on borrowed metals $ 91,866 $ 168,206
Precious Metals Held Under Financing Arrangements    
Liabilities On Borrowed Metals [Line Items]    
Borrowed precious metals from suppliers 71,000 148,900
Inventories    
Liabilities On Borrowed Metals [Line Items]    
Borrowed precious metals from suppliers $ 20,900 $ 19,300