Earnings Per Share - Schedule of Earnings Per Share and Earnings Per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator for earnings per share - basic:
Net income		$ 16,475	$ 15,619	$ 49,879	$ 34,435
Net income attributable to noncontrolling interests:
Operating Partnership		(425)	(434)	(1,305)	(939)
Partially owned properties	[1]	(151)	(136)	(441)	(410)
Preferred distributions		(317)	(314)	(951)	(892)
Net income attributable to common shareholders		15,582	14,735	47,182	32,194
Numerator for earnings per share - diluted:
Numerator for earnings per share - basic		15,582	14,735	47,182	32,194
Operating Partnership net income		425	434	1,305	939
Numerator for earnings per share - diluted		$ 16,007	$ 15,169	$ 48,487	$ 33,133
Denominator for earnings per share - basic and diluted:
Weighted average number of shares outstanding - basic (in shares)		208,187,129	186,328,500	202,717,190	184,760,335
Effect of dilutive securities:
Noncontrolling interest - Operating Partnership units (in shares)		5,643,669	5,536,111	5,655,870	5,398,734
Denominator for earnings per share - diluted (in shares)		215,129,968	191,980,222	209,555,060	190,489,654
Earnings per share - basic (in dollars per share)		$ 0.07	$ 0.08	$ 0.23	$ 0.17
Earnings per share - diluted (in dollars per share)		$ 0.07	$ 0.08	$ 0.23	$ 0.17
Restricted common shares
Effect of dilutive securities:
Restricted common shares/units (in shares)		70,819	79,779	72,522	89,470
Restricted share units
Effect of dilutive securities:
Restricted common shares/units (in shares)		1,228,351	35,832	1,109,478	241,115

[1] Includes amounts attributable to redeemable noncontrolling interests.