CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Stockholders Equity [Abstract]
Common per share (in dollars per share)	$ 0.12	$ 0.11	$ 0.32	$ 0.41
Preferred per share (in dollars per share)	$ 0.47	$ 0.47	$ 1.41	$ 1.41