Consolidated Statements of Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividends on common stock, per common share	$ 0.35	$ 0.35	$ 1.05	$ 0.94
Repurchases of shares of common stock (in shares)	0	780,716	873,376	1,453,908
Series C Preferred Stock
Stock Transactions, Parenthetical Disclosures [Abstract]
Dividends on preferred stock	5.70%	5.70%	5.70%	5.70%