Goodwill and Other Intangible Assets (Schedule of Intangible Assets Subject to Amortization) (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Value	$ 127,034	$ 115,785
Accumulated Amortization	48,724	37,548
Net Book Value	78,310	78,237
Customer relationships
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Value	21,761	21,664
Accumulated Amortization	7,815	6,013
Net Book Value	13,946	15,651
Trademarks
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Value	1,868	1,868
Accumulated Amortization	1,800	1,756
Net Book Value	68	112
Product rights and related intangibles
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Value	83,048	73,261
Accumulated Amortization	23,511	16,410
Net Book Value	59,537	56,851
License agreements
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Value	6,611	6,037
Accumulated Amortization	5,531	4,568
Net Book Value	1,080	1,469
EPA registrations and related data
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Value	13,591	12,800
Accumulated Amortization	9,927	8,683
Net Book Value	3,664	4,117
Technology-based intangibles
Goodwill and Intangible Assets Disclosure [Line Items]
Gross Carrying Value	155	155
Accumulated Amortization	140	118
Net Book Value	$ 15	$ 37