Net Income Per Share - Reconciliation of Numerator and Denominator used in Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator for basic and diluted earnings per share:
Net income	$ 23,400	$ 15,375	$ 10,444	$ 14,043	$ 38,775	$ 24,488
Less: net income attributable to non-controlling interests	(116)		(63)		(196)	(147)
Less: net income allocated to unvested restricted common stock and RSUs	(68)		(77)		(187)	(207)
Net income available for common stockholders: basic	23,216		10,304		38,392	24,134
Net income attributable to non-controlling interests	116		63		196	147
Net income available for common stockholders: diluted	$ 23,332		$ 10,367		$ 38,588	$ 24,281
Denominator for basic and diluted earnings per share:
Weighted average common shares outstanding (in shares)	116,538,347		92,054,919		111,903,879	91,430,110
Less: weighted average number of shares of unvested restricted common stock (in shares)	(219,961)		(450,522)		(225,317)	(466,710)
Weighted average shares outstanding used in basic net income per share (in shares)	116,318,386		91,604,397		111,678,562	90,963,400
Effects of dilutive securities:
Weighted average shares outstanding used in diluted net income per share (in shares)	117,513,344		92,483,898		112,770,501	91,908,098
OP Units
Effects of dilutive securities:
Dilutive securities (in shares)	553,847		553,847		553,847	553,847
Unvested restricted common stock and RSUs
Effects of dilutive securities:
Dilutive securities (in shares)	641,111		325,654		538,092	390,851