Nature of Operations and Summary of Significant Accounting Policies (Policies)	3 Months Ended
Sep. 30, 2016
Accounting Policies [Abstract]
Consolidation	Consolidation The condensed consolidated financial statements include the accounts of JHA and all of its subsidiaries, which are wholly-owned, and all intercompany accounts and transactions have been eliminated.
Property, Plant and Equipment, Impairment [Policy Text Block]	Property and Equipment and Intangible Assets Property and equipment is stated at cost and depreciated using the straight-line method over the estimated useful lives of the assets.
Goodwill and Intangible Assets, Policy [Policy Text Block]	Intangible assets consist of goodwill, customer relationships, computer software, and trade names acquired in business acquisitions in addition to internally developed computer software. The amounts are amortized, with the exception of those with an indefinite life (such as goodwill), over an estimated economic benefit period, generally three to twenty years.
Common Stock	Common Stock The Board of Directors has authorized the Company to repurchase shares of its common stock. Under this authorization, the Company may finance its share repurchases with available cash reserves or short-term borrowings on its existing credit facilities. The share repurchase program does not include specific price targets or timetables and may be suspended at any time.

Nature of Operations and Summary of Significant Accounting Policies (Policies)

3 Months Ended

Sep. 30, 2016

The condensed consolidated financial statements include the accounts of JHA and all of its subsidiaries, which are wholly-owned, and all intercompany accounts and transactions have been eliminated.

Property, Plant and Equipment, Impairment [Policy Text Block]

Property and Equipment and Intangible Assets

Property and equipment is stated at cost and depreciated using the straight-line method over the estimated useful lives of the assets.

Goodwill and Intangible Assets, Policy [Policy Text Block]

Intangible assets consist of goodwill, customer relationships, computer software, and trade names acquired in business acquisitions in addition to internally developed computer software. The amounts are amortized, with the exception of those with an indefinite life (such as goodwill), over an estimated economic benefit period, generally three to twenty years.

Common Stock

The Board of Directors has authorized the Company to repurchase shares of its common stock. Under this authorization, the Company may finance its share repurchases with available cash reserves or short-term borrowings on its existing credit facilities. The share repurchase program does not include specific price targets or timetables and may be suspended at any time.