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Earnings (Loss) Per Share - Summary of Calculation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator
Net income (loss)	$ (9,969)	$ 770
Denominator
Weighted average number of shares – basic	47,957	47,782
Effect of dilutive securities
PSUs, RSUs and restricted stock		71
Weighted average number of shares – diluted	47,957	47,853
Earnings (loss) per share – basic	$ (0.21)	$ 0.02
Earnings (loss) per share – diluted	$ (0.21)	$ 0.02

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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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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