Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Preferred stock dividends per share (in usd per share)	$ 72.52	$ 72.52	$ 72.52
Common stock dividends per share (in usd per share)	$ 0.48	$ 0.48	$ 0.48