CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016
Statement of Stockholders' Equity [Abstract]
Common dividends declared (in dollars per share)	$ 0.32	$ 0.16	$ 0.16	$ 0.16	$ 0.05	$ 0.05