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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						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator
Net income (loss)	$ (10,427)	$ 5,086	$ 896	$ 5,481	$ 752	$ (9,969)	$ (4,445)	$ (3,736)
Denominator
Weighted average number of shares – basic	48,609			47,957			48,470	47,957
Effect of dilutive securities
PSUs, RSUs and restricted stock				467
Weighted average number of shares – diluted	48,609			48,424			48,470	47,957
Earnings (loss) per share – basic	$ (0.21)			$ 0.11			$ (0.09)	$ (0.08)
Earnings (loss) per share – diluted	$ (0.21)			$ 0.11			$ (0.09)	$ (0.08)

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