Preferred Stock Preferred Stock (Details) - USD ($) $ in Thousands								3 Months Ended		9 Months Ended
	Nov. 21, 2019	Aug. 26, 2019	May 20, 2019	Mar. 01, 2019	Nov. 26, 2018	Aug. 29, 2018	May 25, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Dividends, Preferred Stock, Paid-in-kind								$ 6,657	$ 6,193	$ 19,627	$ 11,023
Redeemable Preferred Stock [Member]
Dividends, Preferred Stock, Paid-in-kind		$ 6,657	$ 6,541	$ 6,430	$ 6,317	$ 6,211	$ 4,832
Redeemable Preferred Stock [Member] | Subsequent Event [Member]
Dividends, Preferred Stock, Paid-in-kind	$ 6,773