XML 82 R67.htm IDEA: XBRL DOCUMENT v3.8.0.1
Securities Owned and Sold, Not Yet Purchased (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Securities owned and sold, not yet purchased    
Securities owned, at fair value $ 1,559 $ 2,557
Securities sold, not yet purchased, at fair value 1 249
Corporate stocks-trading securities    
Securities owned and sold, not yet purchased    
Securities owned, at fair value 78 244
Securities sold, not yet purchased, at fair value 1 249
Mutual funds    
Securities owned and sold, not yet purchased    
Securities owned, at fair value $ 1,481 $ 2,313