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Earnings Per Share - Reconciliation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ 799	$ (374)	$ 14,856	$ 2,566	$ 425	$ 17,422
Income allocated to noncontrolling interest	(10)		(147)		(8)	(173)
Net income (loss) allocable to common shares	$ 789		$ 14,709		$ 417	$ 17,249
Weighted-average shares outstanding—Basic	94,435,722		89,513,105		92,646,891	89,252,724
Weighted-average shares outstanding—Diluted	95,092,860		90,019,909		93,550,425	89,902,637
Earnings per share—Basic	$ 0.01		$ 0.16		$ 0.00	$ 0.19
Earnings per share—Diluted	$ 0.01		$ 0.16		$ 0.00	$ 0.19

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