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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, 2021	Mar. 31, 2020
Numerator
Net income (loss)	$ 896	$ (9,969)
Denominator
Weighted average number of shares – basic	48,336	47,957
Effect of dilutive securities
Stock options	56
PSUs, RSUs and restricted stock	612
Weighted average number of shares – diluted	49,004	47,957
Earnings (loss) per share – basic	$ 0.02	$ (0.21)
Earnings (loss) per share – diluted	$ 0.02	$ (0.21)

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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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-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=121326447&loc=d3e1448-109256

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