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Net Income per Share - Schedule of Numerators and Denominators of Basic and Diluted Net Income per Share Computations (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net income	$ 8.6	$ 11.2
Denominator:
Weighted-average shares outstanding - basic	144,645,325	140,149,271
Effect of dilutive equity instruments	6,533,173	6,892,957
Weighted-average shares outstanding - diluted	151,178,498	147,042,228
Net income per share - basic	$ 0.06	$ 0.08
Net income per share - diluted	$ 0.06	$ 0.08

X

- Definition

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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