CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]
Cash dividends per share preferred stock (in dollars per share)	$ 175.00	$ 211.94	$ 525.00	$ 211.94
Cash dividends per share common stock (in dollars per share)	$ 0.25	$ 0.20	$ 0.69	$ 0.60
Shares of preferred stock issued (in shares)				11,500
Shares of common stock issued (in shares)	4,640	40,646	156,230	181,112
Accounting Standards Update [Extensible List]					us-gaap:AccountingStandardsUpdate201602Member