Shareholders' Equity (Details) - $ / shares		1 Months Ended									3 Months Ended	9 Months Ended
		Sep. 30, 2019	Aug. 31, 2019	Jul. 31, 2019	Jun. 30, 2019	May 31, 2019	Apr. 30, 2019	Mar. 31, 2019	Feb. 28, 2019	Jan. 31, 2019	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Stock Issued During Period, Shares, Reverse Stock Splits												49,210,493
Dividends Payable, Date Declared, Month and Year		Sep. 11, 2019	Aug. 12, 2019	Jul. 08, 2019	Jun. 06, 2019	May 16, 2019	Apr. 10, 2019	Mar. 12, 2019	Jan. 28, 2019	Jan. 07, 2019
Preferred stock, shares authorized		50,000,000									50,000,000	50,000,000	50,000,000
Preferred stock, par value		$ 0.01									$ 0.01	$ 0.01	$ 0.01
Preferred stock, shares issued		6,788,330									6,788,330	6,788,330	5,954,594
Preferred Stock, Liquidation Preference Per Share		$ 25.00									$ 25.00	$ 25.00
Preferred Stock, Dividend Payment Terms												The Series A Preferred Stock pays a cumulative cash dividend equivalent to 8.50% of the $25.00 liquidation preference per share each year and the Series B Preferred Stock pays a cumulative cash dividend equivalent to 7.625% of the $25.00 liquidation preference per share each year.
Dividends declared per common share	[1]	$ 0.15	$ 0.15	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.18	$ 0.18
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized		8,000,000									8,000,000	8,000,000
Preferred stock, shares issued		2,300,000									2,300,000	2,300,000	2,300,000
Preferred Stock, Dividend Rate, Percentage												8.50%
Preferred Stock, Dividends Per Share, Declared											$ 0.053125
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized		7,000,000									7,000,000	7,000,000
Preferred stock, shares issued		4,488,330									4,488,330	4,488,330	3,654,594
Preferred Stock, Dividend Rate, Percentage												7.625%
Preferred Stock, Dividends Per Share, Declared											$ 0.4765625
Preferred Stock
Class of Stock [Line Items]
Dividends Payable, Date to be Paid											Oct. 15, 2019
Dividends Payable, Date of Record												Oct. 01, 2019
Common Stock
Class of Stock [Line Items]
Dividends Payable, Date to be Paid		Oct. 01, 2019	Sep. 03, 2019	Aug. 01, 2019	Jul. 03, 2019	Jun. 07, 2019	May 01, 2019	Apr. 01, 2019	Feb. 28, 2019	Jan. 31, 2019
Dividends Payable, Date of Record		Sep. 23, 2019	Aug. 22, 2019	Jul. 22, 2019	Jun. 26, 2019	May 28, 2019	Apr. 22, 2019	Mar. 22, 2019	Feb. 14, 2019	Jan. 18, 2019

[1] Amounts declared have been adjusted to reflect the effect of the 1-for-3 reverse stock split.