Computation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net earnings	$ 17,214	$ 12,302
Weighted average shares	61,223	61,508
Basic earnings per common share:	$ 0.28	$ 0.20
Dilutive effect of common stock equivalents	1,506	1,281
Diluted weighted average common shares	62,729	62,789
Diluted earnings per common share:	$ 0.27	$ 0.20