Income Tax Disclosure [Text Block]	6 Months Ended
Jun. 30, 2019
Notes
Income Tax Disclosure	`Note 9.Income Taxes` The provisions for income taxes shown in the Condensed Consolidated Statements of Income were computed by applying the effective tax rate expected to be applicable for the reporting periods. In 2017, the Tax Cuts and Jobs Act (the “Tax Act”) was enacted. The Tax Act makes broad and complex changes to the U.S. tax code, including, but not limited to, reducing the Federal corporate income tax rate to 21% effective January 1, 2018. As a result of IHC’s June 30 fiscal tax year, the Tax Act subjects IHC to a blended tax rate of 28% for its fiscal tax year ended June 30, 2018. Other differences between the Federal statutory income tax rate and the Company’s effective income tax rate are principally from the dividends received deduction and tax exempt interest income, state and local income taxes, and compensation related tax provisions. The Internal Revenue Service has completed its review of the Company’s 2015 consolidated income tax return with no changes in the Company’s reported tax, however, the New York State Department of Taxation and Finance has recently selected the Company’s 2015 and 2016 income tax returns for audit.

Income Tax Disclosure [Text Block]

6 Months Ended

Jun. 30, 2019

Note 9.Income Taxes

The provisions for income taxes shown in the Condensed Consolidated Statements of Income were computed by applying the effective tax rate expected to be applicable for the reporting periods. In 2017, the Tax Cuts and Jobs Act (the “Tax Act”) was enacted. The Tax Act makes broad and complex changes to the U.S. tax code, including, but not limited to, reducing the Federal corporate income tax rate to 21% effective January 1, 2018. As a result of IHC’s June 30 fiscal tax year, the Tax Act subjects IHC to a blended tax rate of 28% for its fiscal tax year ended June 30, 2018. Other differences between the Federal statutory income tax rate and the Company’s effective income tax rate are principally from the dividends received deduction and tax exempt interest income, state and local income taxes, and compensation related tax provisions.

The Internal Revenue Service has completed its review of the Company’s 2015 consolidated income tax return with no changes in the Company’s reported tax, however, the New York State Department of Taxation and Finance has recently selected the Company’s 2015 and 2016 income tax returns for audit.