Stock-Based Compensation (Granted Stock Options And Restricted Stock Awards) (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	0
Non-Qualified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted	0	17,924	17,085
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted	14,872	21,507	16,504
Stock Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards granted	6,195	7,766	9,065