CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($)	Total		Total Stockholders’ Equity	Class T and Class I Common Stock	Additional Paid-In Capital	Accumulated Deficit	Noncontrolling Interest
Beginning balance, Shares at Dec. 31, 2018				69,254,971
Beginning balance at Dec. 31, 2018	$ 557,672,000			$ 692,000	$ 621,759,000	$ (64,779,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, shares				8,884,165
Issuance of common stock	88,715,000			$ 89,000	88,626,000
Offering costs - common stock	7,385,000
Issuance of common stock under the DRIP, shares				1,987,822
Issuance of common stock under the DRIP	19,056,000		$ 19,056,000	$ 20,000	19,036,000
Issuance of vested and nonvested restricted common stock, shares				22,500
Issuance of vested and nonvested restricted common stock	43,000				43,000
Amortization of nonvested common stock compensation	121,000				121,000
Repurchase of common stock, shares				(668,646)
Repurchase of common stock	(6,192,000)			$ (6,000)	(6,186,000)
Fair value adjustment to redeemable noncontrolling interests	(65,000)				(65,000)
Dividends declared	(34,976,000)					(34,976,000)
Net loss	(20,092,000)	[1]				(20,092,000)
Ending balance, Shares at Sep. 30, 2019				79,480,812
Ending balance at Sep. 30, 2019	596,897,000			$ 795,000	715,949,000	(119,847,000)
Beginning balance, Shares at Jun. 30, 2019				79,084,339
Beginning balance at Jun. 30, 2019	606,949,000			$ 791,000	712,076,000	(105,918,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, shares				(1,393)
Issuance of common stock	(14,000)				(14,000)
Offering costs - common stock	66,000				(66,000)
Issuance of common stock under the DRIP, shares				691,703
Issuance of common stock under the DRIP	6,599,000		6,599,000	$ 7,000	6,592,000
Issuance of vested and nonvested restricted common stock, shares				15,000
Issuance of vested and nonvested restricted common stock	29,000				29,000
Amortization of nonvested common stock compensation	43,000				43,000
Repurchase of common stock, shares				(308,837)
Repurchase of common stock	(2,823,000)			$ (3,000)	(2,820,000)
Fair value adjustment to redeemable noncontrolling interests	(23,000)				(23,000)
Dividends declared	(12,030,000)					(12,030,000)
Net loss	(1,899,000)	[1]				(1,899,000)
Ending balance, Shares at Sep. 30, 2019				79,480,812
Ending balance at Sep. 30, 2019	596,897,000			$ 795,000	715,949,000	(119,847,000)
Beginning balance, Shares at Dec. 31, 2019				79,899,874
Beginning balance at Dec. 31, 2019	590,079,000		590,079,000	$ 798,000	719,894,000	(130,613,000)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Offering costs - common stock	67,000		(67,000)		(67,000)
Issuance of common stock under the DRIP, shares				1,643,731
Issuance of common stock under the DRIP	15,681,000			$ 16,000	15,665,000
Issuance of vested and nonvested restricted common stock, shares				22,500
Issuance of vested and nonvested restricted common stock	43,000		43,000		43,000
Amortization of nonvested common stock compensation	128,000		128,000		128,000
Distributions to noncontrolling interest	(54,000)						(54,000)
Contribution from noncontrolling interest	1,250,000						1,250,000
Repurchase of common stock, shares				(578,111)
Repurchase of common stock	(5,349,000)		(5,349,000)	$ (5,000)	(5,344,000)
Fair value adjustment to redeemable noncontrolling interests	(530,000)		(530,000)		(530,000)
Dividends declared	(28,191,000)		(28,191,000)			(28,191,000)
Net loss	(13,908,000)	[1]	(13,632,000)			(13,632,000)	(276,000)
Ending balance, Shares at Sep. 30, 2020				80,987,994
Ending balance at Sep. 30, 2020	559,216,000		558,296,000	$ 809,000	729,923,000	(172,436,000)	920,000
Beginning balance, Shares at Jun. 30, 2020				80,599,306
Beginning balance at Jun. 30, 2020	569,002,000		567,955,000	$ 805,000	726,516,000	(159,366,000)	1,047,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Offering costs - common stock	5,000		(5,000)		(5,000)
Issuance of common stock under the DRIP, shares				445,239
Issuance of common stock under the DRIP	4,247,000		4,247,000	$ 4,000	4,243,000
Issuance of vested and nonvested restricted common stock, shares				15,000
Issuance of vested and nonvested restricted common stock	29,000		29,000		29,000
Amortization of nonvested common stock compensation	44,000		44,000		44,000
Distributions to noncontrolling interest	(22,000)						(22,000)
Repurchase of common stock, shares				(71,551)
Repurchase of common stock	(706,000)		(706,000)	$ 0	(706,000)
Fair value adjustment to redeemable noncontrolling interests	(208,000)		(208,000)		(208,000)
Dividends declared	(8,150,000)		(8,150,000)			(8,150,000)
Net loss	(5,025,000)	[1]	(4,920,000)			(4,920,000)	(105,000)
Ending balance, Shares at Sep. 30, 2020				80,987,994
Ending balance at Sep. 30, 2020	$ 559,216,000		$ 558,296,000	$ 809,000	$ 729,923,000	$ (172,436,000)	$ 920,000

[1] Amount excludes $127,000 and $19,000 for the three months ended September 30, 2020 and 2019, respectively, and $332,000 and $76,000 for the nine months ended September 30, 2020 and 2019, respectively, of net loss attributable to redeemable noncontrolling interests. See Note 11, Redeemable Noncontrolling Interests, for a further discussion.