Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities, at Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details)

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Assets and Liabilities, at Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Jun. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets $ 57,849 $ 46,325
Derivative liabilities 50,809 25,414
Fair Value on a Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Inventories 517,673 321,264
Precious metals held under financing arrangements 160,255 178,577
Total assets, valued at fair value 735,777 546,166
Liabilities on borrowed metals 141,796 168,206
Product financing arrangements 272,531 74,678
Total liabilities, valued at fair value 465,136 268,298
Fair Value on a Recurring Basis | Open sale and purchase commitments, net    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 57,826 46,224
Fair Value on a Recurring Basis | Forward contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 23 101
Fair Value on a Recurring Basis | Liability on margin accounts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 4,162 5,380
Fair Value on a Recurring Basis | Open sale and purchase commitments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 2,165 4,349
Fair Value on a Recurring Basis | Future contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 33,129 12,477
Fair Value on a Recurring Basis | Forward contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 11,353 3,208
Fair Value on a Recurring Basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Inventories 517,673 321,264
Precious metals held under financing arrangements 160,255 178,577
Total assets, valued at fair value 735,777 546,166
Liabilities on borrowed metals 141,796 168,206
Product financing arrangements 272,531 74,678
Total liabilities, valued at fair value 465,136 268,298
Fair Value on a Recurring Basis | Level 1 | Open sale and purchase commitments, net    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 57,826 46,224
Fair Value on a Recurring Basis | Level 1 | Forward contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 23 101
Fair Value on a Recurring Basis | Level 1 | Liability on margin accounts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 4,162 5,380
Fair Value on a Recurring Basis | Level 1 | Open sale and purchase commitments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 2,165 4,349
Fair Value on a Recurring Basis | Level 1 | Future contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 33,129 12,477
Fair Value on a Recurring Basis | Level 1 | Forward contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 11,353 3,208
Fair Value on a Recurring Basis | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Inventories 0 0
Precious metals held under financing arrangements 0 0
Total assets, valued at fair value 0 0
Liabilities on borrowed metals 0 0
Product financing arrangements 0 0
Total liabilities, valued at fair value 0 0
Fair Value on a Recurring Basis | Level 2 | Open sale and purchase commitments, net    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Fair Value on a Recurring Basis | Level 2 | Forward contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Fair Value on a Recurring Basis | Level 2 | Liability on margin accounts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 0 0
Fair Value on a Recurring Basis | Level 2 | Open sale and purchase commitments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 0 0
Fair Value on a Recurring Basis | Level 2 | Future contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 0 0
Fair Value on a Recurring Basis | Level 2 | Forward contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 0 0
Fair Value on a Recurring Basis | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Inventories 0 0
Precious metals held under financing arrangements 0 0
Total assets, valued at fair value 0 0
Liabilities on borrowed metals 0 0
Product financing arrangements 0 0
Total liabilities, valued at fair value 0 0
Fair Value on a Recurring Basis | Level 3 | Open sale and purchase commitments, net    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Fair Value on a Recurring Basis | Level 3 | Forward contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 0 0
Fair Value on a Recurring Basis | Level 3 | Liability on margin accounts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 0 0
Fair Value on a Recurring Basis | Level 3 | Open sale and purchase commitments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 0 0
Fair Value on a Recurring Basis | Level 3 | Future contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 0 0
Fair Value on a Recurring Basis | Level 3 | Forward contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities $ 0 $ 0