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
Mar. 31, 2020
Jun. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets $ 53,081 $ 2,428
Derivative liabilities 39,532 9,971
Fair Value on a Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Inventories 413,049 292,844
Precious metals held under financing arrangements 187,005 208,792
Total assets, valued at fair value 653,135 504,064
Liabilities on borrowed metals 178,604 201,144
Product financing arrangements 122,126 94,505
Total liabilities, valued at fair value 340,262 305,620
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 10,023 2,322
Fair Value on a Recurring Basis | Future contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 22,620 43
Fair Value on a Recurring Basis | Forward contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 20,438 2
Fair Value on a Recurring Basis | Option contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets   61
Fair Value on a Recurring Basis | Liability on price protection programs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 8 22
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 2,781 2,981
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 35,756 3,822
Fair Value on a Recurring Basis | Future contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 470 1,241
Fair Value on a Recurring Basis | Forward contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 517 1,905
Fair Value on a Recurring Basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Inventories 413,049 292,844
Precious metals held under financing arrangements 187,005 208,792
Total assets, valued at fair value 653,135 504,064
Liabilities on borrowed metals 178,604 201,144
Product financing arrangements 122,126 94,505
Total liabilities, valued at fair value 340,254 305,598
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 10,023 2,322
Fair Value on a Recurring Basis | Level 1 | Future contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets 22,620 43
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 20,438 2
Fair Value on a Recurring Basis | Level 1 | Option contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets   61
Fair Value on a Recurring Basis | Level 1 | Liability on price protection programs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 0 0
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 2,781 2,981
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 35,756 3,822
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 470 1,241
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 517 1,905
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 | Future 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 | 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 | Option contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets   0
Fair Value on a Recurring Basis | Level 2 | Liability on price protection programs    
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 | 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 8 22
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 | Future 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 | 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 | Option contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets   0
Fair Value on a Recurring Basis | Level 3 | Liability on price protection programs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 8 22
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