CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common stock dividends declared and paid (in dollars per share)	$ 2.1000	$ 2.0700	$ 2.0300
Issuance of common stock - Director compensation (in shares)	30,539	35,351	28,287
Issuance of common stock - Stock purchase plan (in shares)	7,062	8,079	6,986
Issuance of common stock - ATM equity program (in shares)	30,000	3,119,153	2,344,022
Issuance of common stock - Equity offering (in shares)			7,000,000
Issuance of common stock - restricted shares, net (in shares)	287,207	263,406	359,650
Series E Preferred Stock
Preferred stock dividends declared and paid (in dollars per share)			$ 1.147917
Redemption of depositary shares (in shares)			11,500,000
Series F Preferred Stock
Preferred stock dividends declared and paid (in dollars per share)	$ 1.086944	$ 1.3000	$ 1.3000
Redemption of depositary shares (in shares)	13,800,000