Condensed Consolidated Statements of Shareholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	Series A	Series B	Preferred Shares of Beneficial Interest Series A	Preferred Shares of Beneficial Interest Series A Series A	Common Shares of Beneficial Interest	Paid-in Capital	Paid-in Capital Series A	Accumulated Deficit and Distributions in Excess of Net Earnings	Accumulated Deficit and Distributions in Excess of Net Earnings Series A	Accumulated Deficit and Distributions in Excess of Net Earnings Series B	Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ (4,001)
Other comprehensive loss	4,714
Ending balance at Jun. 30, 2017												$ (5,830)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(8,385)
Other comprehensive loss	1,098
Ending balance at Jun. 30, 2017												(5,830)
Beginning balance (in shares) at Dec. 31, 2017				125		69,370,609
Beginning balance at Dec. 31, 2017	(186,924)			$ 0		$ 694	$ 394,082		$ (581,470)			(230)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,766								20,766
Other comprehensive loss	(4,959)											(4,959)
Redemption and distributions on preferred shares of beneficial interest – Series A		$ (134)						$ (133)		$ (1)
Redemption and distributions on preferred shares of beneficial interest – Series A (in shares)					(125)
Distributions on preferred shares of beneficial interest – Series B			$ (1,817)								$ (1,817)
Distributions on common shares	(48,686)								(48,686)
Stock-based compensation expense (Stock Options and Restricted Stock Units)	4,095						4,095
Stock-based compensation expense (modification of Restricted Stock Units)	2,042						2,042
Common stock issued, net of shares withheld for employee taxes	739					$ 11	728
Common stock issued, net of shares withheld for employee taxes (in shares)						1,071,367
Warrants exercise	0					$ 64	(64)
Warrants exercise (in shares)						6,426,818
Issuance of common shares	484,905					$ 334	484,571
Issuance of common shares (in shares)						33,350,000
Conversion of mezzanine Series B Preferred shares	372,790					$ 332	372,458
Conversion of mezzanine Series B Preferred shares (in shares)						33,240,258
Ending balance at Jun. 30, 2018	642,817			$ 0		$ 1,435	1,257,779		(611,208)			(5,189)
Ending balance (in shares) at Jun. 30, 2018				0		143,459,052
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,406
Other comprehensive loss	(4,021)
Ending balance at Jun. 30, 2018	$ 642,817			$ 0		$ 1,435	$ 1,257,779		$ (611,208)			$ (5,189)
Ending balance (in shares) at Jun. 30, 2018				0		143,459,052