Business Segments - Segments in Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Segment Reporting Information
Net sales	$ 195,194	$ 189,720
Depreciation and amortization	8,036	7,781
Reconciliation of income before income taxes to Adjusted EBITDA
Income before income taxes	16,509	3,572
Interest expense, net	2,810	3,354
Depreciation and amortization	8,036	7,781
Stock-based compensation	565	565
Foreign currency (gains) losses, net	(3,631)	3,221
Identifiable assets	789,554		$ 784,100
Animal Health
Segment Reporting Information
Net sales	128,369	121,850
Mineral Nutrition
Segment Reporting Information
Net sales	51,440	52,649
Performance Products
Segment Reporting Information
Net sales	15,385	15,221
Operating Segments
Segment Reporting Information
Net sales	195,194	189,720
Depreciation and amortization	7,615	7,374
Adjusted EBITDA - Total segments	35,120	29,388
Reconciliation of income before income taxes to Adjusted EBITDA
Income before income taxes	16,509	3,572
Interest expense, net	2,810	3,354
Depreciation and amortization	7,615	7,374
Restructuring costs	0	425
Stock-based compensation	565	565
Acquisition-related costs of goods sold	0	280
Acquisition-related transaction costs	0	462
Foreign currency (gains) losses, net	(3,631)	3,221
Adjusted EBITDA - Total segments	35,120	29,388
Identifiable assets	663,145		657,365
Operating Segments | Animal Health
Segment Reporting Information
Net sales	128,369	121,850
Depreciation and amortization	6,521	6,384
Adjusted EBITDA - Total segments	30,101	25,061
Reconciliation of income before income taxes to Adjusted EBITDA
Depreciation and amortization	6,521	6,384
Adjusted EBITDA - Total segments	30,101	25,061
Identifiable assets	556,895		560,663
Operating Segments | Mineral Nutrition
Segment Reporting Information
Net sales	51,440	52,649
Depreciation and amortization	649	613
Adjusted EBITDA - Total segments	3,047	3,475
Reconciliation of income before income taxes to Adjusted EBITDA
Depreciation and amortization	649	613
Adjusted EBITDA - Total segments	3,047	3,475
Identifiable assets	72,295		65,686
Operating Segments | Performance Products
Segment Reporting Information
Net sales	15,385	15,221
Depreciation and amortization	445	377
Adjusted EBITDA - Total segments	1,972	852
Reconciliation of income before income taxes to Adjusted EBITDA
Depreciation and amortization	445	377
Adjusted EBITDA - Total segments	1,972	852
Identifiable assets	33,955		31,016
Corporate
Segment Reporting Information
Depreciation and amortization	421	407
Reconciliation of income before income taxes to Adjusted EBITDA
Depreciation and amortization	421	407
Corporate costs	10,831	$ 9,728
Identifiable assets	$ 126,409		$ 126,735