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, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Fully diluted earnings (loss) per share
Net income (loss) available to common stockholders	$ 28,099	$ 13,611	$ 42,413	$ 75,479
Allocations of net income (loss) to limited partnership interests, net of tax	12,337	7,399	18,282	24,716
Net income (loss) for fully diluted shares	$ 40,436	$ 21,010	$ 60,695	$ 100,195
Weighted-average shares:
Common stock outstanding	360,614	341,272	359,308	339,845
Partnership units	184,122	180,279	181,257	125,824
RSUs (Treasury stock method)	174	57	549	168
Other	1,213	1,376	1,276	1,395
Fully diluted weighted-average shares of common stock outstanding	546,123	522,984	542,390	467,232
Fully diluted earnings (loss) per share	$ 0.07	$ 0.04	$ 0.11	$ 0.21