CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Stockholders Equity [Abstract]
Common per share (in dollars per share)	$ 0.60	$ 0.47	$ 0.49
Preferred per share (in dollars per share)	$ 1.875	$ 1.875	$ 1.875