Nature of Operations and Summary of Significant Accounting Policies (Text Block)	9 Months Ended
Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Summary of Significant Accounting Policies [Text Block]	NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Description of the Company Jack Henry & Associates, Inc. and subsidiaries (“JHA” or the “Company”) is a provider of integrated computer systems and services that has developed and acquired a number of banking and credit union software systems. The Company's revenues are predominately earned by marketing those systems to financial institutions nationwide together with computer equipment (hardware), by providing the conversion and implementation services for financial institutions to utilize JHA systems, and by providing other related services. JHA also provides continuing support and services to customers using in-house or outsourced systems. 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. Comprehensive Income Comprehensive income for the three and nine months ended March 31, 2018 and 2017 equals the Company’s net income. Prior Period Reclassification During the first quarter of fiscal 2018, the Company's management decided to change the presentation of its income statement, along with a change in the segment structure (see Note 10), in order to more clearly align with the way management manages the Company and evaluates performance. Amounts within the condensed consolidated statements of income for the three and nine months ended March 31, 2017 have been reclassified to improve comparability with the three and nine months ended March 31, 2018. Revenue was previously classified as license, support and service, and hardware, and has been reclassified into one "Revenue" caption. Cost of sales was previously presented under three captions to correspond with our three lines of revenue, and has now been condensed to one caption, "Cost of Revenue". We have elected to include all operating expenses, including cost of revenue, under one expenses heading. Previously, cost of revenue was presented separately from operating expenses in order to show gross profit. Gross profit has been removed from our current presentation due to management's focus on operating income. Additionally, within operating expenses, selling and marketing expense and general and administrative expense were previously presented under two captions, but are now condensed under one caption, labeled "Selling, General, and Administrative." The condensed consolidated statement of income within our Form 10-Q filed for the third quarter of fiscal 2017 did not include the "Gain on Disposal of a Business" caption. The amounts shown on that line were previously included within general and administrative expense. Property and Equipment Property and equipment is stated at cost and depreciated using the straight-line method over the estimated useful lives of the assets. Accumulated depreciation at March 31, 2018 totaled $373,116 and at June 30, 2017 totaled $345,014. Intangible Assets 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 intangible assets with an indefinite life (such as goodwill), over an estimated economic benefit period, generally three to twenty years. Accumulated amortization of intangible assets totaled $578,771 and $503,653 at March 31, 2018 and June 30, 2017, respectively. Purchase of Investment In the third quarter of fiscal 2018, the Company made an investment totaling $5,000 for the purchase of preferred stock of Automated Bookkeeping, Inc ("Autobooks"), representing a non-controlling share of the voting equity of Autobooks as of that date. This investment was recorded at cost and is included within other non-current assets on our balance sheet. The fair value of this investment has not been estimated, as estimation is not practicable. There have been no events or changes in circumstances that would indicate an impairment. Fair value will not be estimated unless there are identified events or changes in circumstances that may have a significant adverse effect on the fair value of the investment. 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 borrowings on its existing line-of-credit. The share repurchase program does not include specific price targets or timetables and may be suspended at any time. At March 31, 2018, there were 25,962 shares in treasury stock and the Company had the remaining authority to repurchase up to 4,029 additional shares. The total cost of treasury shares at March 31, 2018 is $1,036,292. During the first nine months of fiscal 2018, the Company repurchased 302 treasury shares for $30,018. At June 30, 2017, there were 25,660 shares in treasury stock and the Company had authority to repurchase up to 4,330 additional shares. Dividends declared per share were $0.37 and $0.31, for the three months ended March 31, 2018 and 2017, respectively, and totaled $0.99 and $0.87 for the nine months ended March 31, 2018 and 2017, respectively. Interim Financial Statements The accompanying condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q of the Securities and Exchange Commission ("SEC") and in accordance with accounting principles generally accepted in the United States of America applicable to interim condensed consolidated financial statements, and do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete consolidated financial statements. The condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes, which are included in its Annual Report on Form 10-K (“Form 10-K”) for the fiscal year ended June 30, 2017. The accounting policies followed by the Company are set forth in Note 1 to the Company's consolidated financial statements included in its Form 10-K for the fiscal year ended June 30, 2017. In the opinion of the management of the Company, the accompanying unaudited condensed consolidated financial statements reflect all adjustments necessary (consisting of normal recurring adjustments) to state fairly the financial position of the Company as of March 31, 2018, the results of its operations for the three and nine months ending March 31, 2018 and 2017, and its cash flows for the nine months ending March 31, 2018 and 2017. The condensed consolidated balance sheet at June 30, 2017 was derived from audited annual financial statements, but does not contain all of the footnote disclosures from the annual financial statements. The results of operations for the three and nine months ended March 31, 2018 are not necessarily indicative of the results to be expected for the entire year.

NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Description of the Company

Jack Henry & Associates, Inc. and subsidiaries (“JHA” or the “Company”) is a provider of integrated computer systems and services that has developed and acquired a number of banking and credit union software systems. The Company's revenues are predominately earned by marketing those systems to financial institutions nationwide together with computer equipment (hardware), by providing the conversion and implementation services for financial institutions to utilize JHA systems, and by providing other related services. JHA also provides continuing support and services to customers using in-house or outsourced systems.

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.

Comprehensive Income

Comprehensive income for the three and nine months ended March 31, 2018 and 2017 equals the Company’s net income.

Prior Period Reclassification

During the first quarter of fiscal 2018, the Company's management decided to change the presentation of its income statement, along with a change in the segment structure (see Note 10), in order to more clearly align with the way management manages the Company and evaluates performance. Amounts within the condensed consolidated statements of income for the three and nine months ended March 31, 2017 have been reclassified to improve comparability with the three and nine months ended March 31, 2018. Revenue was previously classified as license, support and service, and hardware, and has been reclassified into one "Revenue" caption. Cost of sales was previously presented under three captions to correspond with our three lines of revenue, and has now been condensed to one caption, "Cost of Revenue". We have elected to include all operating expenses, including cost of revenue, under one expenses heading. Previously, cost of revenue was presented separately from operating expenses in order to show gross profit. Gross profit has been removed from our current presentation due to management's focus on operating income. Additionally, within operating expenses, selling and marketing expense and general and administrative expense were previously presented under two captions, but are now condensed under one caption, labeled "Selling, General, and Administrative."

The condensed consolidated statement of income within our Form 10-Q filed for the third quarter of fiscal 2017 did not include the "Gain on Disposal of a Business" caption. The amounts shown on that line were previously included within general and administrative expense.

Property and Equipment

Property and equipment is stated at cost and depreciated using the straight-line method over the estimated useful lives of the assets. Accumulated depreciation at March 31, 2018 totaled $373,116 and at June 30, 2017 totaled $345,014.

Intangible Assets

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 intangible assets with an indefinite life (such as goodwill), over an estimated economic benefit period, generally three to twenty years. Accumulated amortization of intangible assets totaled $578,771 and $503,653 at March 31, 2018 and June 30, 2017, respectively.

Purchase of Investment

In the third quarter of fiscal 2018, the Company made an investment totaling $5,000 for the purchase of preferred stock of Automated Bookkeeping, Inc ("Autobooks"), representing a non-controlling share of the voting equity of Autobooks as of that date. This investment was recorded at cost and is included within other non-current assets on our balance sheet. The fair value of this investment has not been estimated, as estimation is not practicable. There have been no events or changes in circumstances that would indicate an impairment. Fair value will not be estimated unless there are identified events or changes in circumstances that may have a significant adverse effect on the fair value of the investment.

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 borrowings on its existing line-of-credit. The share repurchase program does not include specific price targets or timetables and may be suspended at any time. At March 31, 2018, there were 25,962 shares in treasury stock and the Company had the remaining authority to repurchase up to 4,029 additional shares. The total cost of treasury shares at March 31, 2018 is $1,036,292. During the first nine months of fiscal 2018, the Company repurchased 302 treasury shares for $30,018. At June 30, 2017, there were 25,660 shares in treasury stock and the Company had authority to repurchase up to 4,330 additional shares.

Dividends declared per share were $0.37 and $0.31, for the three months ended March 31, 2018 and 2017, respectively, and totaled $0.99 and $0.87 for the nine months ended March 31, 2018 and 2017, respectively.

Interim Financial Statements

The accompanying condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q of the Securities and Exchange Commission ("SEC") and in accordance with accounting principles generally accepted in the United States of America applicable to interim condensed consolidated financial statements, and do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete consolidated financial statements. The condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes, which are included in its Annual Report on Form 10-K (“Form 10-K”) for the fiscal year ended June 30, 2017. The accounting policies followed by the Company are set forth in Note 1 to the Company's consolidated financial statements included in its Form 10-K for the fiscal year ended June 30, 2017.

In the opinion of the management of the Company, the accompanying unaudited condensed consolidated financial statements reflect all adjustments necessary (consisting of normal recurring adjustments) to state fairly the financial position of the Company as of March 31, 2018, the results of its operations for the three and nine months ending March 31, 2018 and 2017, and its cash flows for the nine months ending March 31, 2018 and 2017. The condensed consolidated balance sheet at June 30, 2017 was derived from audited annual financial statements, but does not contain all of the footnote disclosures from the annual financial statements.

The results of operations for the three and nine months ended March 31, 2018 are not necessarily indicative of the results to be expected for the entire year.