Earnings Per Share (Narrative) (Details) - $ / shares	3 Months Ended						9 Months Ended		12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Earnings Per Share [Abstract]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.32	$ 0.32	$ 0.32	$ 0.27	$ 0.27	$ 0.27
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	201,880			7,641			221,845	331,994
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period							127,467	255,376	338,748
Stock Issued During Period, Shares, Restricted Stock Vesting							54,433	76,346