Acquisition - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Revenue		$ 34,233,556	$ 30,348,154	$ 100,491,425	$ 87,980,419
Goodwill		$ 4,116,805		4,116,805			$ 2,948,502
MWI Veterinary Supply, Inc. [Member]
Business Acquisition [Line Items]
Purchase price	$ 2,600,000			$ 2,600,000
Goodwill	1,200,000
Accounts receivable	346,900
Inventory	440,000
Accounts payable	327,100
Deferred tax liability	570,200
Estimated fair value of the intangible assets acquired	1,500,000
MWI Veterinary Supply, Inc. [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Estimated fair value of the intangible assets acquired	$ 1,100,000
Remaining estimated useful lives	20 years
MWI Veterinary Supply, Inc. [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Estimated fair value of the intangible assets acquired	$ 344,000
MWI Veterinary Supply, Inc. [Member] | Computer Software, Intangible Asset [Member]
Business Acquisition [Line Items]
Estimated fair value of the intangible assets acquired	$ 11,000
Remaining estimated useful lives	8 years
MWI Veterinary Supply, Inc. [Member] | Scenario, Forecast [Member]
Business Acquisition [Line Items]
Revenue						$ 3,000,000