Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 187,495	$ 173,267	$ 563,641	$ 508,237
Adjusted EBITDA	27,496	22,444	82,982	66,352
Depreciation and amortization	(5,356)	(5,122)	(15,950)	(15,615)
Interest expense, net	(3,602)	(8,744)	(10,607)	(26,198)
Foreign currency gains (losses), net	4,633	(275)	6,855	$ (2,088)
Acquisition related accrued compensation	(327)		(327)
Income before income taxes	22,844	8,303	62,953	$ 22,451
Identifiable assets	472,338		472,338		$ 472,323
Operating Segments | Animal Health
Segment Reporting Information [Line Items]
Net sales	117,346	107,808	353,356	316,945
Adjusted EBITDA	29,629	25,505	90,379	74,134
Identifiable assets	351,881		351,881		361,376
Operating Segments | Mineral Nutrition
Segment Reporting Information [Line Items]
Net sales	57,320	49,901	171,509	146,720
Adjusted EBITDA	3,761	2,807	10,994	8,145
Identifiable assets	58,887		58,887		57,460
Operating Segments | Performance Products
Segment Reporting Information [Line Items]
Net sales	12,829	15,558	38,776	44,572
Adjusted EBITDA	994	906	2,192	3,105
Identifiable assets	21,827		21,827		23,429
Corporate
Segment Reporting Information [Line Items]
Adjusted EBITDA	(6,888)	$ (6,774)	(20,583)	$ (19,032)
Identifiable assets	$ 39,743		$ 39,743		$ 30,058