Commitments, Contingencies and Other Matters (Detail) In Thousands, unless otherwise specified	9 Months Ended							3 Months Ended		3 Months Ended			12 Months Ended			1 Months Ended
	Mar. 31, 2013 USD ($)		Jun. 30, 2012 USD ($)		Mar. 31, 2012 Entity	Mar. 31, 2013 Subsidiary [Member] USD ($)	Jun. 30, 2012 Subsidiary [Member] USD ($)	Mar. 31, 2013 Rising Pharmaceuticals Inc. USD ($)	Jun. 30, 2012 Rising Pharmaceuticals Inc. USD ($)	Mar. 31, 2013 Pulvair Site Group USD ($)	Mar. 31, 2013 Arsynco Inc. USD ($)	Jun. 30, 2012 Arsynco Inc. USD ($)	Jun. 30, 2009 BASF Corporation USD ($)	Mar. 31, 2013 BASF Corporation USD ($)	Jun. 30, 2012 BASF Corporation USD ($)	Oct. 29, 2012 United Phosphorous Limited Damages from Product Defects USD ($)	Oct. 29, 2012 United Phosphorous Limited Damages from Product Defects GBP (£)
Commitments and Contingencies Disclosure [Line Items]
Loss contingency, damages sought										$ 1,700						$ 7,200	£ 4,500
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											7,400	7,566
Partial reimbursement of environmental remediation costs previously expensed													550
Environmental remediation costs expensed in prior years													1,200
Future remediation costs receivable														3,330	3,405
Number of potentially responsible parties					150
Amount expected to be paid for product registrations and various task force groups						4,661
Amount accrued for product registrations and various task force groups						0	242
Earnings before Interest taxes, depreciation and amortization								32,100
Contingent consideration, maximum								6,000
Contingent consideration at fair value	4,811	[1]	1,779	[2]				4,811	1,779
Business acquisition, additional contingent consideration accrued	$ 2,840							$ 2,840

[1] Included in "Other receivables" in the accompanying Condensed Consolidated Balance Sheet as of June 30, 2012.

[2] Included in "Long-term liabilities" in the accompanying Condensed Consolidated Balance Sheet as of June 30, 2012.