XML 48 R37.htm IDEA: XBRL DOCUMENT v3.20.2
Investment Securities - Available for sale sponsored funds with fair values below carrying values (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
security
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
security
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Unrealized losses          
Securities in an unrealized loss position | security 1   1    
Net unrealized gains (losses) on equity securities $ 7,300 $ (200) $ (500) $ 17,900  
Commercial paper          
Fair value          
Less than 12 months 2,420   2,420    
Total fair value 2,420   2,420    
Unrealized losses          
Less than 12 months (9)   (9)    
Total unrealized losses $ (9)   $ (9)    
Corporate bonds          
Fair value          
Less than 12 months         $ 4,538
12 months or longer         8,056
Total fair value         12,594
Unrealized losses          
12 months or longer         (5)
Total unrealized losses         $ (5)