Organization and Business - (Tables)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Trust's common shares issuance and sale

During 2017 and 2018, the Trust’s issuance and sale of common shares pursuant to the ATM Program is as follows (in thousands, except common shares and price): 

	2018					2017
	Common shares sold	Weighted average price		Net proceeds		Common shares sold	Weighted average price		Net proceeds
Quarterly period ended March 31	311,786	$	17.85	$	5,509	—	$	—	$	—
Quarterly period ended June 30	—	—		—		4,150,000	20.07		82,440
Quarterly period ended September 30	114,203	17.15		1,947		—	—		—
Quarterly period ended December 31	144,562	17.03		2,442		2,197,914	18.39		40,011
Year ended December 31	570,551	$	17.50	$	9,898	6,347,914	$	19.48	$	122,451