Summary of Significant Accounting Policies (Fair Value of Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Financial assets:
Receivables, advances receivables and secured loans	$ 80,640	$ 94,509
Financial liabilities:
Liability for borrowed metals	8,709	20,117
Product financing obligation	24,610	38,554
Accrued liabilities	6,070	6,601
Payable to Former Parent	0	1,015
Carrying Amount
Financial assets:
Cash	13,193	21,565
Receivables, advances receivables and secured loans	80,640	94,509
Income taxes receivable from Former Parent	3,139	0
Financial liabilities:
Lines of credit	135,200	95,000
Liability for borrowed metals	8,709	20,117
Product financing obligation	24,610	38,554
Obligation to repurchase common stock	0	0
Accounts payable, margin accounts, advances and other payables	53,627	55,818
Accrued liabilities	6,070	6,601
Payable to Former Parent	0	9,520
Fair value
Financial assets:
Cash	13,193	21,565
Receivables, advances receivables and secured loans	80,640	94,509
Income taxes receivable from Former Parent	3,139	0
Financial liabilities:
Lines of credit	135,200	95,000
Liability for borrowed metals	8,709	20,117
Product financing obligation	24,610	38,554
Obligation to repurchase common stock	0	0
Accounts payable, margin accounts, advances and other payables	53,627	55,818
Accrued liabilities	6,070	6,601
Payable to Former Parent	0	9,520
Open sales and purchase commitments | Carrying Amount
Financial liabilities:
Derivative liabilities - open sale and purchase commitments, net, included in payable	848	30,192
Open sales and purchase commitments | Fair value
Financial liabilities:
Derivative liabilities - open sale and purchase commitments, net, included in payable	848	30,192
Future contracts | Carrying Amount
Financial liabilities:
Derivative liabilities	8,078	0
Future contracts | Fair value
Financial liabilities:
Derivative liabilities	8,078	0
Forward contracts | Carrying Amount
Financial liabilities:
Derivative liabilities	14,873	0
Forward contracts | Fair value
Financial liabilities:
Derivative liabilities	14,873	0
Open sales and purchase commitments | Carrying Amount
Financial assets:
Derivative assets - open sale and purchase commitments, net, included in receivable	22,170	0
Open sales and purchase commitments | Fair value
Financial assets:
Derivative assets - open sale and purchase commitments, net, included in receivable	22,170	0
Forward contracts | Carrying Amount
Financial assets:
Derivative assets - future and forward contracts	14	471
Forward contracts | Fair value
Financial assets:
Derivative assets - future and forward contracts	14	471
Future contracts | Carrying Amount
Financial assets:
Derivative assets - future and forward contracts	0	14,967
Future contracts | Fair value
Financial assets:
Derivative assets - future and forward contracts	$ 0	$ 14,967