Commitments, Contingencies and Other Matters (Narrative) (Detail) In Thousands, unless otherwise specified	12 Months Ended									12 Months Ended
	Jun. 30, 2014 USD ($) Entity	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2014 United Phosphorous Limited USD ($)	Jun. 30, 2014 United Phosphorous Limited GBP (£)	Jun. 30, 2013 United Phosphorous Limited USD ($)	Jun. 30, 2014 Pulvair Site Group USD ($)	Jun. 30, 2014 Arsynco, Inc USD ($)	Jun. 30, 2013 Arsynco, Inc USD ($)	Jun. 30, 2009 BASF Corporation USD ($)	Jun. 30, 2014 BASF Corporation USD ($)	Jun. 30, 2013 BASF Corporation USD ($)	Jun. 30, 2014 Subsidiary USD ($)	Jun. 30, 2013 Subsidiary USD ($)
Commitments and Contingencies Disclosure [Line Items]
Outstanding purchase obligations	$ 50,806
Loss contingency, damages sought				7,200	4,500	7,200	1,700
Site contingency loss exposure not accrued, low estimate								12,200
Site contingency loss exposure not accrued, high estimate								14,000
Accrual for environmental loss contingencies								8,907	7,166
Partial reimbursement of environmental remediation costs previously expensed										550
Environmental remediation costs expensed in prior years										1,200
Future remediation costs receivable											4,008	3,225
Number of potentially responsible parties	150
Amount expected to be paid for product registrations and various task force groups													3,900
Amount accrued for product registrations and various task force groups													0	0
Total rental expense	$ 1,576	$ 1,269	$ 1,090