XML 32 R81.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Stock Options (Equity Incentive Plan) (Details) - shares
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Non Qualified Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options available for grant at end of year (in shares) 499,640 146,075 176,294