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Computation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net earnings	$ 21,141	$ 16,294
Weighted average shares	62,744	62,020
Basic earnings per common share	$ 0.34	$ 0.26
Net earnings	$ 21,141	$ 16,294
Weighted average shares	62,744	62,020
Dilutive effect of common stock equivalents	2,539	1,570
Diluted weighted average common shares	65,283	63,590
Diluted earnings per common share	$ 0.32	$ 0.26

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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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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