XML 25 R31.htm IDEA: XBRL DOCUMENT v3.20.1
Investment Securities (Narrative) (Details)
$ in Millions
Mar. 31, 2020
USD ($)
Investments
Dec. 31, 2019
Investments
Investment Securities (Textual)    
Fair market value, less than 12 months, number of investments | Investments 8 28
Fair market value, less than 12 months | $ $ 6.8  
Fair market value, 12 months or longer, number of investments | Investments 10  
Fair market value, 12 months or longer | $ $ 10.1