Equity - Schedule of Basic and Diluted Earnings Per Share, or EPS, Based on Weighted-Average of Both Restricted and Unrestricted Class A Common Stock Outstanding (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ 17,544	$ 75,174	$ (35,808)	$ 151,738
Weighted-average shares outstanding, basic and diluted	138,299,418	126,475,244	136,959,341	125,410,064
Per share amount, basic and diluted	$ 0.13	$ 0.59	$ (0.26)	$ 1.21