Consolidated Statements Of Equity (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Consolidated Statement Of Equity (Parenthetical) [Abstract]
Dividend declared per common share	$ 0.2507	$ 0.2343	$ 0.2343	$ 0.2343	$ 0.2190	$ 0.2190
Stock issued for acquisition, shares					37,370,017
Issuance of common stock from private placement, shares			21,661,095
Issuance of common stock from stock purchase contracts , shares			2,335,654	29,484
Issuance of common stock under dividend reinvestment plan, shares	104,637	100,148	86,969	9,334	10,162	117,845
Repurchase of stock, shares	44	100	81,722	189	46	52,124
Equity compensation plan, shares	6,088	4,594	223,495	4,165	5,099	134,257
Exercise of stock options, shares	4,270	3,411	56,106	9,864	21,148	77,479