Environmental Remediation (Detail) (USD $) In Thousands, unless otherwise specified		12 Months Ended				12 Months Ended
	Jun. 30, 2012 Entity	Jun. 30, 2012 Pulvair Site Group [Member]	Jun. 13, 2012 Pulvair Site Group [Member]	Jun. 30, 2012 Arsynco Inc. [Member]	Jun. 30, 2011 Arsynco Inc. [Member]	Jun. 30, 2009 BASF Corporation [Member]	Jun. 30, 2012 BASF Corporation [Member]	Jun. 30, 2011 BASF Corporation [Member]
Site Contingency [Line Items]
Loss contingency, damages sought value		$ 1,700	$ 1,700
Site contingency loss exposure not accrued, low estimate				8,400
Site contingency loss exposure not accrued, high estimate				10,200
Accrual for environmental loss contingencies				7,566	7,962
Partial reimbursement of environmental remediation costs previously expensed						550
Environmental remediation costs expensed in prior years						1,200
Future remediation costs receivable							$ 3,405	$ 3,583
Number of potentially responsible parties	150