CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash dividends per share common stock (in dollars per share)	$ 0.40	$ 0.33
Shares of common stock purchased (in shares)	1,761	9,392
Shares of common stock issued (in shares)	4,521,434	3,835,532
Series D Preferred Stock
Cash dividends per share preferred stock (in dollars per share)	$ 52.50	$ 52.50