Nature of Operations and Summary of Significant Accounting Policies (Text Block)	6 Months Ended
Dec. 31, 2017
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 six months ended December 31, 2017 and 2016 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 9), 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 six months ended December 31, 2016 have been reclassified to improve comparability with the three and six months ended December 31, 2017. 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." 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 December 31, 2017 totaled $368,599 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 with an indefinite life (such as goodwill), over an estimated economic benefit period, generally three to twenty years. Accumulated amortization of intangible assets totaled $552,340 and $503,653 at December 31, 2017 and June 30, 2017, respectively. 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 December 31, 2017, 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 December 31, 2017 is $1,036,292. During the first six 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 $0.31 and $0.28, for the three months ended December 31, 2017 and 2016, respectively, and totaled $0.62 and $0.56 for the six months ended December 31, 2017 and 2016, 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 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 December 31, 2017, the results of its operations for the three and six months ending December 31, 2017 and 2016, and its cash flows for the six months ending December 31, 2017 and 2016. 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 period ended December 31, 2017 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 six months ended December 31, 2017 and 2016 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 9), 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 six months ended December 31, 2016 have been reclassified to improve comparability with the three and six months ended December 31, 2017. 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."

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 December 31, 2017 totaled $368,599 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 with an indefinite life (such as goodwill), over an estimated economic benefit period, generally three to twenty years. Accumulated amortization of intangible assets totaled $552,340 and $503,653 at December 31, 2017 and June 30, 2017, respectively.

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 December 31, 2017, 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 December 31, 2017 is $1,036,292. During the first six 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 $0.31 and $0.28, for the three months ended December 31, 2017 and 2016, respectively, and totaled $0.62 and $0.56 for the six months ended December 31, 2017 and 2016, 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 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 December 31, 2017, the results of its operations for the three and six months ending December 31, 2017 and 2016, and its cash flows for the six months ending December 31, 2017 and 2016. 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 period ended December 31, 2017 are not necessarily indicative of the results to be expected for the entire year.