Commitments, Contingencies and Other Matters (Narrative) (Detail) In Thousands, unless otherwise specified	12 Months Ended								12 Months Ended
	Jun. 30, 2013 USD ($) Entity	Jun. 30, 2012 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2013 United Phosphorous Limited [Member] USD ($)	Jun. 30, 2013 United Phosphorous Limited [Member] GBP (£)	Jun. 30, 2013 Pulvair Site Group [Member] USD ($)	Jun. 30, 2013 Arsynco Inc. [Member] USD ($)	Jun. 30, 2012 Arsynco Inc. [Member] USD ($)	Jun. 30, 2009 BASF Corporation [Member] USD ($)	Jun. 30, 2013 BASF Corporation [Member] USD ($)	Jun. 30, 2012 BASF Corporation [Member] USD ($)	Jun. 30, 2013 Subsidiary [Member] USD ($)	Jun. 30, 2012 Subsidiary [Member] USD ($)
Commitments and Contingencies Disclosure [Line Items]
Total outstanding purchase obligations	$ 73,770
Loss contingency, damages sought				7,200	4,500	1,700
Site contingency loss exposure not accrued, low estimate							9,000
Site contingency loss exposure not accrued, high estimate							10,800
Accrual for environmental loss contingencies							7,166	7,566
Partial reimbursement of environmental remediation costs previously expensed									550
Environmental remediation costs expensed in prior years									1,200
Future remediation costs receivable										3,225	3,405
Number of potentially responsible parties	150
Amount expected to be paid for product registrations and various task force groups												4,561
Amount accrued for product registrations and various task force groups												0	242
Total rental expense	$ 1,169	$ 992	$ 1,562