Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities, at Fair Value (Narrative) (Details)

v3.8.0.1
Assets and Liabilities, at Fair Value (Narrative) (Details)
$ in Thousands
Dec. 31, 2017
USD ($)
investment
Jun. 30, 2017
USD ($)
Fair Value Disclosures [Abstract]    
Commemorative coins, held at lower of cost or market $ 129 $ 40
Number of investments | investment 2  
Equity and cost method investment $ 8,146 $ 7,967