Earnings (Loss) Per Share and Weighted-Average Shares Outstanding - Calculation of Basic 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
Basic earnings (loss) per share
Net income (loss) available to common stockholders	[1]	$ (2,131)	$ 19,444	$ 3,604	$ 33,124
Basic weighted-average shares of common stock outstanding (in shares)		178,523	178,754	178,034	178,683
Basic earnings (loss) per share (in usd per share)		$ (0.01)	$ 0.11	$ 0.02	$ 0.19
Reduction for dividends on preferred stock or units		$ 2,400	$ 3,200	$ 4,900	$ 6,400

[1] ⁽¹⁾  Includes a reduction for dividends on preferred stock or exchangeable preferred partnership units in the amount of $2.4 million and $4.9 million for the three and six months ended June 30, 2020, respectively, and $3.2 million and $6.4 million for the three and six months ended June 30, 2019, respectively (see Note 1 — “Organization and Basis of Presentation”).