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QUARTERLY FINANCIAL DATA (UNAUDITED) (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Effect of Fourth Quarter Events [Line Items]
Goodwill impairment	$ 394									$ 394	$ 0	$ 7,700
Impairment charge related to long-lived assets		$ 6,438	$ 5,875
Impairment charge related to long-lived assets, net		5,897	5,265
Inventory write-down			1,362	$ 3,927		$ 10,346				4,175	12,381
Inventory write-down, net			1,005	2,896		7,606
Chief Executive Officer Succession Plan expense, gross								$ 10,148	$ 19,553
Former Chief Executive Officer Succession Plan expense, net								7,484	14,420	0	30,156	520
Professional fees								920	3,414	0	4,334	9,293
Professional fees, net								678	2,518
Intangibles impairment				1,889						27,493	33,719	14,033
Intangibles impairment, net		$ 3,274		1,389
Trade Names
Effect of Fourth Quarter Events [Line Items]
Intangibles impairment			7,650					17,900			17,900	5,632
Intangibles impairment, net			5,706					13,374
Disposed of by Sale \| Tilda
Effect of Fourth Quarter Events [Line Items]
Pre-tax loss			(540)	(3,752)						9,386	0	0
Net of tax loss			$ 362	$ 2,720
Reclassification of currency translation adjustment included in Net loss from discontinued operations					$ 95,120
Income tax expense (benefit), discontinued operations					$ 16,500
Disposed of by Sale \| Hain Pure Protein
Effect of Fourth Quarter Events [Line Items]
Pre-tax loss							$ (40,223)			(3,043)	(40,859)	0
Net of tax loss							29,511
Asset impairments							51,348	54,946	2,958	$ 0	109,252	78,464
Asset impairments, net							$ 37,532	$ 40,314	2,170
United States
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets						4,393
Impairment charge related to long-lived assets, net						3,558
United Kingdom
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets						5,617
Impairment charge related to long-lived assets, net						$ 4,143
United Kingdom \| Manufacturing Facility
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets									4,243		$ 6,166	$ 6,344
Impairment charge related to long-lived assets, net									$ 3,436