Segment Information (Schedule of Net Sales and Gross Profit by Source Country) (Detail) - USD ($) $ 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
Segment Reporting Information [Line Items]
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
Geographic region | United States
Segment Reporting Information [Line Items]
Net Sales												400,883	407,101	355,715
Gross Profit												117,180	111,734	82,573
Geographic region | Germany
Segment Reporting Information [Line Items]
Net Sales												76,666	69,889	84,024
Gross Profit												15,154	14,660	22,614
Geographic region | Netherlands
Segment Reporting Information [Line Items]
Net Sales												16,217	14,656	14,869
Gross Profit												1,598	1,325	1,581
Geographic region | France
Segment Reporting Information [Line Items]
Net Sales												30,177	27,976	29,412
Gross Profit												4,043	3,634	4,182
Geographic region | Asia-Pacific
Segment Reporting Information [Line Items]
Net Sales												34,581	27,329	26,159
Gross Profit												$ 4,810	$ 4,081	$ 3,753

[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.