Quarterly report pursuant to Section 13 or 15(d)

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

v3.5.0.2
Secured Loans Receivable (Loans Receivable and Credit Quality Indicators) (Details)
$ in Thousands
 3 Months Ended
Sep. 30, 2016
USD ($)
class
Sep. 30, 2015
Jun. 30, 2016
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Classes of receivables | class 3    
Secured loan $ 82,782   $ 70,504
Secured loan, percentage 100.00%   100.00%
Secured loans (current) $ 82,782   $ 70,004
Bullion and Numismatic      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loan $ 82,132   $ 69,804
Secured loan, percentage 99.20%   99.00%
Secured loans (current) $ 82,132   $ 69,804
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) $ 43,185   $ 10,231
Secured loans (current), percentage 52.60%   14.70%
Bullion and Numismatic | Loan-to-value of less than 75%      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loans (current) $ 38,947   $ 59,573
Secured loans (current), percentage 47.40%   85.30%
Bullion      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loan $ 52,764   $ 35,168
Secured loan, percentage 63.70%   49.90%
Numismatic and semi numismatic      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loan $ 29,368   $ 34,636
Secured loan, percentage 35.50%   49.10%
Other pledged assets      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loan $ 650   $ 700
Secured loan, percentage 0.80%   1.00%
Minimum      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Credit quality indicator Loan-to-value threshold percentage   75.00%