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Earnings Per Share - Calculation of Basic Earnings Per Share from Continuing and Discontinued Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic earnings (loss) per share:
Net income (loss) from continuing operations available to common stockholders	$ 55,707	$ 73,704	$ (124,803)
Net income (loss) from discontinued operations available to common stockholders		120,438	176,278
Net income (loss) available to common stockholders	$ 55,707	$ 194,142	$ 51,475
Basic weighted-average shares of common stock outstanding	344,332	322,141	287,378
Continuing operations	$ 0.16	$ 0.23	$ (0.43)
Discontinued operations		0.37	0.61
Basic earnings (loss) per share	$ 0.16	$ 0.60	$ 0.18

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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