Subsequent Events - Narrative (Details) - Series D - $ / shares	Aug. 15, 2019	Jul. 12, 2019	May 15, 2019	Apr. 11, 2019	Feb. 15, 2019	Jan. 11, 2019
Subsequent Event [Line Items]
Dividend declared (in dollars per share)				$ 0.40625		$ 0.40625
Dividend paid (in dollars per share)			$ 0.40625		$ 0.40625
Subsequent event
Subsequent Event [Line Items]
Dividend declared (in dollars per share)		$ 0.40625
Scenario, Forecast
Subsequent Event [Line Items]
Dividend paid (in dollars per share)	$ 0.40625