Dividends and Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			3 Months Ended
	Mar. 31, 2018	Jan. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Dividends Payable [Line Items]
Dividend Per Share (in dollars per share)	$ 0.140	$ 0.019	$ 0.073	$ 0.15	$ 0.07
Common Shares
Distributions Paid or Accrued	$ 20,145	$ 1,291	$ 5,053	$ 21,436
Series B Preferred Shares
Distributions Paid or Accrued				1,817	$ 7,109
Participating Dividend
Series B Preferred Shares
Distributions Paid or Accrued	$ 0	$ 619	$ 2,421
Fixed Dividend
Series B Preferred Shares
Distributions Paid or Accrued				$ 1,198	$ 4,688