Unaudited Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended											12 Months Ended
	Jun. 30, 2016	[1]	Mar. 31, 2016	[2]	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	[3]	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 135,424		$ 157,926		$ 131,674	$ 133,500	$ 146,587		$ 145,796	$ 123,765	$ 130,803	$ 558,524	$ 546,951	$ 510,179
Gross profit	34,047		38,289		35,868	34,581	41,166		36,598	30,019	27,651	142,785	135,434	114,703
Net income	$ 6,774		$ 10,424		$ 8,270	$ 9,298	$ 13,636		$ 8,411	$ 6,608	$ 4,828	$ 34,766	$ 33,483	$ 29,000
Net income per diluted share	$ 0.23		$ 0.35		$ 0.28	$ 0.32	$ 0.46		$ 0.29	$ 0.23	$ 0.17	$ 1.18	$ 1.14	$ 1.02

[1] Includes pretax item of $1,313 environmental remediation charge in connection with Arsynco.

[2] Includes pretax items consisting of $833 reversal of contingent consideration related to the PACK acquisition and $241 reversal of contingent consideration related to the acquisition of a company in France.

[3] Includes pretax items consisting of $1,618 environmental remediation charge in connection with Arsynco, $3,468 reversal of contingent consideration related to the PACK acquisition and $3,497 change in estimate for product returns.