Earnings Per Share - Calculation of Fully Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Fully diluted earnings (loss) per share
Net income (loss) available to common stockholders	$ 18,169	$ 27,919	$ 61,260	$ 41,593
Allocations of net income (loss) to limited partnership interests, net of tax	7,854	12,254	27,011	17,905
Net income (loss) for fully diluted shares	$ 26,023	$ 40,173	$ 88,271	$ 59,498
Weighted-average shares:
Common stock outstanding (in shares)	384,902	360,614	379,639	359,308
Partnership units (in shares)	173,606	184,122	175,849	181,257
RSUs (Treasury stock method) (in shares)	4,141	174	3,475	549
Other (in shares)	1,274	1,213	1,247	1,276
Fully diluted weighted-average shares of common stock outstanding (in shares)	563,923	546,123	560,210	542,390
Fully diluted earnings (loss) per share (in shares)	$ 0.05	$ 0.07	$ 0.16	$ 0.11