XML 49 R38.htm IDEA: XBRL DOCUMENT v3.5.0.2
Investments - Fair Value of Investments on Deposit with Governmental Authorities - Narrative (Details) - USD ($)
$ in Millions
Sep. 30, 2016
Dec. 31, 2015
Investments Debt And Equity Securities [Abstract]    
Fair values of investments on deposit $ 19.4 $ 18.1