Earnings Per Share ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator
Net (loss) income	$ (26,727)	$ 13,947	$ (17,996)	$ 22,790
Less net loss attributable to noncontrolling interests	(1,611)	(1,787)	(402)	(768)
Net (loss) income attributable to the Company	(25,116)	15,734	(17,594)	23,558
Allocation of earnings to participating securities	(297)	(291)	(619)	(573)
Numerator for basic and diluted EPS—net (loss) income attributable to common stockholders	$ (25,413)	$ 15,443	$ (18,213)	$ 22,985
Denominator
Denominator for basic and diluted EPS—weighted average number of common shares outstanding (in shares)	144,102,000	141,344,000	142,769,000	141,303,000
EPS—net (loss) income attributable to common stockholders
Basic and diluted (in dollars per share)			$ (0.13)	$ 0.16
Convertible non-participating preferred units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from Diluted EPS (in shares)	94,619	90,619	92,619	90,619
Partnership unit
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded from Diluted EPS (in shares)	10,504,452	10,415,278	10,491,138	10,415,234