Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities, at Fair Value (Details)

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Assets and Liabilities, at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Jun. 30, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets - future and forward contracts $ 12,376 $ 18,253
Liability on borrowed metals 5,573 9,500
Product financing arrangement 93,168 39,425
Derivative liabilities - open sale and purchase commitments, net, included in payables 11,073 17,897
Derivative liabilities - futures contracts 16,539 24,153
Accrued liabilities 6,600 5,330
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 12,972 20,927
Receivables and advances, net 25,928 30,025
Lines of credit 190,000 147,000
Liability on borrowed metals 5,573 9,500
Product financing arrangement 93,168 39,425
Accounts payable, advances and other payables 42,838 50,639
Accrued liabilities 6,600 5,330
Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Cash 12,972 20,927
Receivables and advances, net 25,928 30,025
Lines of credit 190,000 147,000
Liability on borrowed metals 5,573 9,500
Product financing arrangement 93,168 39,425
Accounts payable, advances and other payables 42,838 50,639
Accrued liabilities 6,600 5,330
Open sales and purchase commitments | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Secured loans 64,827 49,316
Derivative assets - open sale and purchase commitments, net 9,834 1,722
Open sales and purchase commitments | Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Secured loans 64,827 49,316
Derivative assets - open sale and purchase commitments, net 9,834 1,722
Future contracts | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets - future and forward contracts 1,226 5,363
Future contracts | Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets - future and forward contracts 1,226 5,363
Forward contracts | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets - future and forward contracts 26 4,279
Forward contracts | Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative assets - future and forward contracts 26 4,279
Forward contracts | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liabilities - open sale and purchase commitments, net, included in payables 2,963 0
Forward contracts | Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liabilities - open sale and purchase commitments, net, included in payables 2,963 0
Future contracts | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liabilities - futures contracts 1,163 0
Future contracts | Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liabilities - futures contracts 1,163 0
Derivative liability margin accounts | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liabilities - open sale and purchase commitments, net, included in payables 6,788 6,908
Derivative liability margin accounts | Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liabilities - open sale and purchase commitments, net, included in payables 6,788 6,908
Open sales and purchase commitments | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liabilities - open sale and purchase commitments, net, included in payables 159 10,989
Open sales and purchase commitments | Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liabilities - open sale and purchase commitments, net, included in payables 159 10,989
SGI (Former Parent) | Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Income taxes receivable from Former Parent 0 1,095
Income taxes payable to Former Parent 510 0
SGI (Former Parent) | Fair value    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Income taxes receivable from Former Parent 0 1,095
Income taxes payable to Former Parent $ 510 $ 0