Quarterly Financial Data (Unaudited) (Narrative) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Effect of Fourth Quarter Events [Line Items]
Goodwill impairment	$ 7,700,000								$ 7,700,000	$ 0	$ 84,548,000
Goodwill impairment, net	5,553,000
Intangibles impairment									14,033,000	40,452,000	43,200,000
Impairment charge related to long-lived assets	113,000		$ 3,449,000
Impairment charge related to long-lived assets, net	104,000		2,593,000
Accounting review costs	2,887,000	$ 3,313,000	4,451,000	$ 3,642,000	$ 9,473,000	$ 7,124,000	$ 7,005,000	$ 5,960,000	9,293,000	29,562,000	0
Accounting review costs, net	1,941,000	2,654,000	$ 3,346,000	2,638,000	6,773,000	$ 5,029,000	$ 5,050,000	$ 4,112,000
Insurance proceeds				5,000,000
Insurance proceeds, net				3,622,000
United Kingdom
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets											3,476,000
United States
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets										2,661,000
Facility Closing | United Kingdom
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets		2,557,000
Machinery and equipment | United Kingdom
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets, net		2,050,000
Machinery and equipment | United States
Effect of Fourth Quarter Events [Line Items]
Impairment charge related to long-lived assets		2,057,000							2,057,000
Impairment charge related to long-lived assets, net		$ 1,648,000
Rest of World
Effect of Fourth Quarter Events [Line Items]
Goodwill impairment									7,700,000
United Kingdom
Effect of Fourth Quarter Events [Line Items]
Goodwill impairment				$ 0					0
Intangibles impairment					26,373,000					26,373,000	$ 3,476,000
Intangibles impairment, net					20,877,000
Held for Sale | Hain Pure Protein
Effect of Fourth Quarter Events [Line Items]
Impairments of long-lived assets held for sale	78,464,000				0				78,464,000	0
Trade Names
Effect of Fourth Quarter Events [Line Items]
Intangibles impairment	5,632,000				14,079,000				5,632,000	$ 14,079,000
Intangibles impairment, net					$ 10,733,000
Trade Names | Rest of World
Effect of Fourth Quarter Events [Line Items]
Intangibles impairment									5,100,000
Intangibles impairment, net	$ 5,192,000
Trade Names | United Kingdom
Effect of Fourth Quarter Events [Line Items]
Intangibles impairment									$ 532,000