Equity - Common Stock Dividends (Details) - $ / shares		3 Months Ended		9 Months Ended
	Aug. 02, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Equity [Abstract]
Quarterly dividend of common stock declared (in dollars per share)	$ 0.1375	$ 0.14	$ 0.14	$ 0.41	$ 0.41
Annualized dividend rate (in dollars per share)	$ 0.55