Environmental Remediation (Narrative) (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($) Entity	Jun. 30, 2015 USD ($) Entity	Jun. 30, 2009 USD ($)	Jun. 30, 2014 USD ($)
Site Contingency [Line Items]
Environmental remediation charge included in selling, general and administrative expenses		$ 1,618
Pulvair Site Group
Site Contingency [Line Items]
Loss contingency, damages sought value		1,700
BASF Corporation
Site Contingency [Line Items]
Partial reimbursement of environmental remediation costs previously expensed			$ 550
Environmental remediation costs expensed in prior years			$ 1,200
Future remediation costs receivable	$ 4,985	4,985		$ 4,008
Arsynco, Inc
Site Contingency [Line Items]
Site contingency loss exposure not accrued, low estimate		16,500
Site contingency loss exposure not accrued, high estimate		18,300
Accrual for environmental loss contingencies	11,079	11,079		$ 8,907
Environmental remediation charge included in selling, general and administrative expenses	$ 1,618	$ 1,618
Number of potentially responsible parties | Entity	150	150