Quarterly report pursuant to Section 13 or 15(d)

Secured Loans Receivables (Loans Receivable and Credit Quality Indicators) (Details)

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Secured Loans Receivables (Loans Receivable and Credit Quality Indicators) (Details)
$ in Thousands
6 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
class
Jun. 30, 2015
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Classes of receivables | class 3  
Secured loan $ 57,708 $ 49,316
Secured loan, percentage 100.00% 100.00%
Secured loans (current) $ 57,108 $ 48,666
Bullion and Numismatic    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loan $ 56,908 $ 48,466
Secured loan, percentage 98.60% 98.30%
Secured loans (current) $ 56,908 $ 48,466
Secured loans (current), percentage 100.00% 100.00%
Bullion and Numismatic | Loan-to-value of 75% or more    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loans (current) $ 34,010 $ 17,153
Secured loans (current), percentage 59.80% 35.40%
Bullion and Numismatic | Loan-to-value of less than 75%    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loans (current) $ 22,898 $ 31,313
Secured loans (current), percentage 40.20% 64.60%
Bullion    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loan $ 21,794 $ 16,250
Secured loan, percentage 37.80% 33.00%
Numismatic and semi numismatic    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loan $ 35,114 $ 32,216
Secured loan, percentage 60.80% 65.30%
Other pledged assets    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Secured loan $ 800 $ 850
Secured loan, percentage 1.40% 1.70%
Minimum    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Credit quality indicator Loan-to-value threshold percentage 75.00% 75.00%