Annual report pursuant to Section 13 and 15(d)

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

v3.2.0.727
Assets and Liabilities, at Fair Value (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts $ 18,253 $ 26,296
Derivative liabilities 17,897 32,782
Fair Value on a Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Inventory 189,983 172,990
Total assets valued at fair value 201,347 195,174
Liability on borrowed metals 9,500 8,709
Product financing arrangement 39,425 24,610
Liability on margin accounts 6,908 8,983
Total liabilities, valued at fair value 66,822 66,101
Fair Value on a Recurring Basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Inventory 189,983 172,990
Total assets valued at fair value 201,347 195,174
Liability on borrowed metals 9,500 8,709
Product financing arrangement 39,425 24,610
Liability on margin accounts 6,908 8,983
Total liabilities, valued at fair value 66,822 66,101
Fair Value on a Recurring Basis | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Inventory 0 0
Total assets valued at fair value 0 0
Liability on borrowed metals 0 0
Product financing arrangement 0 0
Liability on margin accounts 0 0
Total liabilities, valued at fair value 0 0
Fair Value on a Recurring Basis | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Inventory 0 0
Total assets valued at fair value 0 0
Liability on borrowed metals 0 0
Product financing arrangement 0 0
Liability on margin accounts 0 0
Total liabilities, valued at fair value 0 0
Derivative Asset Open Purchases And Sales Commitments | Fair Value on a Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 1,722  
Derivative Asset Open Purchases And Sales Commitments | Fair Value on a Recurring Basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 1,722  
Derivative Asset Open Purchases And Sales Commitments | Fair Value on a Recurring Basis | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 0  
Derivative Asset Open Purchases And Sales Commitments | Fair Value on a Recurring Basis | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 0  
Precious metals futures contracts at market values | Fair Value on a Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 5,363 14
Precious metals futures contracts at market values | Fair Value on a Recurring Basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 5,363 14
Precious metals futures contracts at market values | Fair Value on a Recurring Basis | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 0 0
Precious metals futures contracts at market values | Fair Value on a Recurring Basis | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 0 0
Forward contracts | Fair Value on a Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 4,279 22,170
Forward contracts | Fair Value on a Recurring Basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 4,279 22,170
Forward contracts | Fair Value on a Recurring Basis | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 0 0
Forward contracts | Fair Value on a Recurring Basis | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets - future and forward contracts 0 0
Forward contracts | Fair Value on a Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities   14,873
Forward contracts | Fair Value on a Recurring Basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities   14,873
Forward contracts | Fair Value on a Recurring Basis | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities   0
Forward contracts | Fair Value on a Recurring Basis | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities   0
Open sales and purchase commitments | Fair Value on a Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 10,989 848
Open sales and purchase commitments | Fair Value on a Recurring Basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 10,989 848
Open sales and purchase commitments | Fair Value on a Recurring Basis | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities 0 0
Open sales and purchase commitments | Fair Value on a Recurring Basis | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities $ 0 0
Precious metals futures contracts at market values | Fair Value on a Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities   8,078
Precious metals futures contracts at market values | Fair Value on a Recurring Basis | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities   8,078
Precious metals futures contracts at market values | Fair Value on a Recurring Basis | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities   0
Precious metals futures contracts at market values | Fair Value on a Recurring Basis | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative liabilities   $ 0