Goodwill and Other Intangible Assets (Narrative) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Line Items]
Goodwill	$ 236,970	$ 67,871	$ 67,870
Intangible assets amortization method	straight-line method
Indefinite-lived trademarks	$ 783	761
Amortization charges from acquired intangible assets	22,234	$ 11,176	$ 10,278
Estimated aggregate amortization expense for 2018	16,747
Estimated aggregate amortization expense for 2019	32,431
Estimated aggregate amortization expense for 2020	31,880
Estimated aggregate amortization expense for 2021	31,819
Estimated aggregate amortization expense for 2022	31,782
Estimated aggregate amortization expense after 2023	$ 139,639
Customer relationships | Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life	7 years
Customer relationships | Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life	11 years
Trademarks | Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life	3 years
Trademarks | Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life	4 years
Product rights and related intangibles | Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life	3 years
Product rights and related intangibles | Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life	14 years
License agreements | Minimum
Goodwill and Intangible Assets Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life	6 years
License agreements | Maximum
Goodwill and Intangible Assets Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life	11 years
EPA registrations and related data
Goodwill and Intangible Assets Disclosure [Line Items]
Finite-lived intangible assets, estimated useful life	10 years