XML 128 R54.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Basis of Presentation, Organization and Summary of Significant Accounting Policies (Advertising Costs) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]      
Advertising expense $ 3.6 $ 3.8 $ 4.4