Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2015
Segment Reporting Information [Line Items]
Net sales	$ 191,773	$ 188,688	$ 378,893	$ 376,146
Depreciation and amortization	5,393	5,241	10,822	10,594
Adjusted EBITDA	28,434	25,028	56,141	55,486
Reconciliation of adjusted EBITDA to income before income taxes
Adjusted EBITDA	28,434	25,028	56,141	55,486
Depreciation and amortization	(5,393)	(5,241)	(10,822)	(10,594)
Acquisition related accrued compensation	(420)		(840)
Interest expense, net	(3,967)	(3,515)	(7,786)	(7,005)
Foreign currency gains (losses), net	(2,557)	1,018	2,896	2,222
Income before income taxes	16,097	17,290	39,589	40,109
Identifiable assets	521,497		521,497		$ 493,318
Operating Segments | Animal Health
Segment Reporting Information [Line Items]
Net sales	121,504	118,785	241,638	236,010
Depreciation and amortization	3,829	3,710	7,705	7,538
Adjusted EBITDA	32,351	28,296	63,827	60,750
Reconciliation of adjusted EBITDA to income before income taxes
Adjusted EBITDA	32,351	28,296	63,827	60,750
Depreciation and amortization	(3,829)	(3,710)	(7,705)	(7,538)
Identifiable assets	370,522		370,522		361,078
Operating Segments | Mineral Nutrition
Segment Reporting Information [Line Items]
Net sales	58,853	58,742	113,322	114,189
Depreciation and amortization	612	605	1,220	1,209
Adjusted EBITDA	4,189	3,754	7,349	7,233
Reconciliation of adjusted EBITDA to income before income taxes
Adjusted EBITDA	4,189	3,754	7,349	7,233
Depreciation and amortization	(612)	(605)	(1,220)	(1,209)
Identifiable assets	62,771		62,771		59,881
Operating Segments | Performance Products
Segment Reporting Information [Line Items]
Net sales	11,416	11,161	23,933	25,947
Depreciation and amortization	194	147	388	293
Adjusted EBITDA	(8)	162	78	1,198
Reconciliation of adjusted EBITDA to income before income taxes
Adjusted EBITDA	(8)	162	78	1,198
Depreciation and amortization	(194)	(147)	(388)	(293)
Identifiable assets	23,718		23,718		22,255
Corporate
Segment Reporting Information [Line Items]
Depreciation and amortization	758	779	1,509	1,554
Adjusted EBITDA	(8,098)	(7,184)	(15,113)	(13,695)
Reconciliation of adjusted EBITDA to income before income taxes
Adjusted EBITDA	(8,098)	(7,184)	(15,113)	(13,695)
Depreciation and amortization	(758)	$ (779)	(1,509)	$ (1,554)
Identifiable assets	$ 64,486		$ 64,486		$ 50,104