Equity - Summary of Changes In Stockholders' Equity (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Shareholders Equity [Line Items]
Balance	$ 1,199,841	$ 1,025,253
Stock based compensation	1,000	734
Dividends and distributions paid	(22,086)	(18,433)
Issuance of common stock	4,825	125,724
Contribution of Property for common units	21,550
Unrealized loss on interest rate swaps, net	(9,846)	(3,017)
Net income (loss)	1,918	(481)
Balance	$ 1,197,202	1,129,746
Balance (in shares)	75,077,197
ASU 2016-02 [Member]
Shareholders Equity [Line Items]
Cumulative effect adjustment related to adoption of Leases		(34)
Common Stock Par Value [Member]
Shareholders Equity [Line Items]
Balance	$ 748	$ 608
Balance (in shares)	74,832,292	60,849,206
Grant of unvested restricted stock		$ 1
Grant of unvested restricted stock	2,905	57,121
Redemption of common units for shares of common stock	$ 1
Redemption of common units for shares of common stock (in shares)	42,000	33,125
Issuance of common stock	$ 2	$ 71
Issuance of common stock (in share)	200,000	7,066,455
Balance	$ 751	$ 680
Balance (in shares)	75,077,197	68,005,907
Additional Paid-in Capital [Member]
Shareholders Equity [Line Items]
Balance	$ 1,257,319	$ 1,017,415
Stock based compensation	224	183
Grant of unvested restricted stock		(1)
Redemption of common units for shares of common stock	596	493
Issuance of common stock	4,823	125,653
Allocation of non-controlling interest in Operating Partnership	7,796	(15,805)
Balance	1,270,758	1,127,938
Retained Earnings (Deficit) [Member]
Shareholders Equity [Line Items]
Balance	20,004	12,831
Net income (loss)	1,697	(416)
Balance	21,701	12,381
Retained Earnings (Deficit) [Member] | ASU 2016-02 [Member]
Shareholders Equity [Line Items]
Cumulative effect adjustment related to adoption of Leases		(34)
Cumulative Dividends [Member]
Shareholders Equity [Line Items]
Balance	(210,760)	(139,103)
Dividends and distributions paid	(19,516)	(15,841)
Balance	(230,276)	(154,944)
Accumulated Other Comprehensive Income (Loss) [Member]
Shareholders Equity [Line Items]
Balance	(4,690)	2,412
Unrealized loss on interest rate swaps, net	(8,586)	(2,631)
Balance	(13,276)	(219)
Non-controlling Interest in Operating Partnership [Member]
Shareholders Equity [Line Items]
Balance	137,220	131,090
Stock based compensation	776	551
Dividends and distributions paid	(2,570)	(2,592)
Redemption of common units for shares of common stock	(597)	(493)
Contribution of Property for common units	21,550
Unrealized loss on interest rate swaps, net	(1,260)	(386)
Net income (loss)	221	(65)
Allocation of non-controlling interest in Operating Partnership	(7,796)	15,805
Balance	$ 147,544	$ 143,910