Quarterly report pursuant to Section 13 or 15(d)

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

v3.6.0.2
Secured Loans Receivable (Loans Receivable and Credit Quality Indicators) (Details) - USD ($)
$ in Thousands
6 Months Ended
Dec. 31, 2015
Dec. 31, 2016
Jun. 30, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loan   $ 80,939 $ 70,504
Secured loan, percentage   100.00% 100.00%
Secured loans (current)   $ 80,939 $ 70,004
Bullion and Numismatic      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loan   $ 80,939 $ 69,804
Secured loan, percentage   100.00% 99.00%
Secured loans (current)   $ 80,939 $ 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)   $ 43,638 $ 10,231
Secured loans (current), percentage   53.90% 14.70%
Bullion and Numismatic | Loan-to-value of less than 75%      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loans (current)   $ 37,301 $ 59,573
Secured loans (current), percentage   46.10% 85.30%
Bullion      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loan   $ 51,850 $ 35,168
Secured loan, percentage   64.10% 49.90%
Numismatic and semi numismatic      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loan   $ 29,089 $ 34,636
Secured loan, percentage   35.90% 49.10%
Other pledged assets      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Secured loan   $ 0 $ 700
Secured loan, percentage   0.00% 1.00%
Minimum      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Credit quality indicator Loan-to-value threshold percentage 75.00%