CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017
Statement of Stockholders' Equity [Abstract]
Common dividends declared (in dollars per share)	$ 0.45	$ 0.32	$ 0.32	$ 0.32	$ 0.16	$ 0.16