Acquisitions and Disposals (Fiscal 2015) (Narrative) (Details) € in Thousands, CAD in Thousands, $ in Thousands	3 Months Ended					9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) shares	Sep. 30, 2015 EUR (€) shares	Mar. 31, 2015 USD ($)	Mar. 31, 2015 CAD	Sep. 30, 2014 USD ($) shares	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Jul. 24, 2015 USD ($)	Mar. 04, 2015 USD ($)	Feb. 20, 2015 USD ($)	Jul. 17, 2014 USD ($)	Jun. 30, 2014 USD ($)
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets								$ 7,288
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent								17,266
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities								60,144
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets								81,726
Business Acquisition, Cost of Acquired Entity, Cash Paid								91,893
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures						$ 20,034		2,305
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life						12 years
Payments to Acquire Businesses, Net of Cash Acquired						$ 157,864	$ 104,419
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee						$ 0	8,256
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned								$ 19,690
Mona [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent									$ 27,303
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities									1,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets									17,811
Payments to Acquire Businesses and Interest in Affiliates	$ 25,233	€ 23,012
Business Acquisition, Cost of Acquired Entity, Cash Paid	$ 25,233
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares	240,207	240,207
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned									$ 16,308
Noncash or Part Noncash Acquisition, Debt Assumed | €		€ 16,252
Hain Pure Protein [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets												$ 7,288
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent												1,388
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities												42,332
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets												$ 52,055
Business Acquisition, Cost of Acquired Entity, Cash Paid					$ 20,310
Business Acquisition, Percentage of Voting Interests Acquired												51.30%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures													$ 30,740
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee					$ 5,334		(8,256)
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares					462,856
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned												$ 19,690
Belvedere [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets											$ 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent											3,890
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities											1,825
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets											10,042
Business Acquisition, Cost of Acquired Entity, Cash Paid			$ 13,988	CAD 17,454
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High											4,000
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned											$ 0
Empire Kosher [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets										$ 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent										14,764
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities										15,987
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets										$ 19,629
Business Acquisition, Percentage of Voting Interests Acquired										81.00%		19.00%
Noncontrolling Interest in Joint Ventures										$ 6,864
Payments to Acquire Businesses, Net of Cash Acquired			57,595
Gain (Loss) on Disposition of Stock in Subsidiary or Equity Method Investee			2,922
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned										$ 0
FY'15 Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			15,903				15,903
Patents [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles			$ 1,700				$ 1,700
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							11 years
Trade Names [Member]
Business Acquisition [Line Items]
Indefinite-lived Intangible Assets Acquired							$ 43,747
Patents [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							9 years