Document and Entity Information [Abstract] Document and Entity Information [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Trading Symbol Trading Symbol Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Statement Of Financial Position [Abstract] Statement of Financial Position [Abstract] Assets [Abstract] ASSETS Property, Plant and Equipment, Net Investment in hotel, net Investment in hotel, net Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Real Estate Investment Property, Net Investment in real estate, net Trading Securities Investment in marketable securities Other Investments Other investments, net Cash and Cash Equivalents, At Carrying Value Cash and cash equivalents Cash and cash equivalents Cash and cash equivalents at the beginning of the period Cash and cash equivalents at the end of the period Restricted Cash and Cash Equivalents Restricted cash Other Assets Other assets, net Other assets, net Assets Total assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities [Abstract] Liabilities: Accounts Payable and Accrued Liabilities Accounts payable and other liabilities Due To Securities Broker Due to securities broker Carrying value of amount payable to securities broker as at the reporting date. Obligations For Securities Sold Obligations for securities sold Carrying value of obligations for securities sold as at the reporting date. Other Notes Payable Other notes payable Mortgage Notes Payable - Hotel Mortgage notes payable - hotel Carrying amount as of the balance sheet date of mortgage notes payable related to hotel property, plant and equipment. Mortgage Notes Payable - Real Estate Mortgage notes payable - real estate Carrying amount as of the balance sheet date of mortgage notes payable relating to real estate property. Deferred Tax Liabilities Deferred income taxes Deferred income taxes Liabilities Total liabilities Total liabilities Commitments and Contingencies Commitments and contingencies Stockholders Equity, Including Portion Attributable To Noncontrolling Interest [Abstract] Shareholders' equity: Preferred Stock, Value, Issued Preferred stock, $.01 par value, 100,000 shares authorized; none issued Preferred Stock, Value, Issued, Total Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Ending Balance Common Stock, Value, Issued Common stock, $.01 par value, 4,000,000 shares authorized; 3,340,704 and 3,322,172 issued; 2,412,012 and 2,398,438 outstanding, respectively Common Stock, Value, Issued, Total Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Ending Balance Additional Paid In Capital, Common Stock Additional paid-in capital Additional Paid in Capital, Common Stock, Beginning Balance Additional Paid in Capital, Common Stock, Ending Balance Retained Earnings (Accumulated Deficit) Retained earnings Retained earnings Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Ending Balance Treasury Stock, Value Treasury stock, at cost, 928,692 and 923,734 shares Treasury Stock, Value, Beginning Balance Treasury Stock, Value, Ending Balance Treasury stock, at cost, 888,988 shares Treasury stock, at cost, 928,692 and 923,734 shares Stockholders Equity Attributable To Parent Total InterGroup shareholders' equity Total Intergroup shareholders' equity Stockholders' Equity Attributable to Parent, Beginning Balance Stockholders' Equity Attributable to Parent, Ending Balance Stockholders Equity Attributable To Noncontrolling Interest Noncontrolling interest(deficit) Noncontrolling interest Stockholders' Equity Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance Stockholders Equity, Including Portion Attributable To Noncontrolling Interest Total shareholders' equity(deficit) Total shareholders' equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance Liabilities and Equity Total liabilities and shareholders' equity(deficit) Total liabilities and shareholders' equity Condensed Consolidated Balance Sheet Parenthetical [Abstract] Condensed Consolidated Balance Sheet Parenthetical [Abstract] Condensed Consolidated Balance Sheet Parenthetical Preferred Stock, Par Or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock , shares issued Preferred Stock, Shares Issued, Total Common Stock, Par Or Stated Value Per Share Common stock, par value (in dollars per share) Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Issued, Total Common Stock, Shares, Outstanding Common stock , shares outstanding Common Stock, Shares, Outstanding, Beginning Balance Common Stock, Shares, Outstanding, Ending Balance Treasury Stock, Shares Treasury stock, shares Treasury Stock, Shares, Beginning Balance Treasury Stock, Shares, Ending Balance Income Statement [Abstract] Income Statement [Abstract] Revenue, Net [Abstract] Revenues: Revenue From Hotels Hotel Hotel Real Estate Revenue, Net Real estate Real estate Revenue, Net Total revenues Total revenues Costs and Expenses [Abstract] Costs and operating expenses: Direct Costs Of Hotels Hotel operating expenses Hotel operations Hotel operating expenses Cost Of Real Estate Revenue Real estate operating expenses Real estate operations Real estate operating expenses Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization expense Depreciation and amortization Depreciation and amortization expense General and Administrative Expense General and administrative expense General and administrative General and administrative expense General and administrative expense Costs and Expenses Total costs and operating expenses Total costs and operating expenses Total costs and operating expenses Total costs and operating expenses Operating Income (Loss) Income from operations Income from operations Nonoperating Income (Expense) [Abstract] Other income (expense): Interest Expense, Debt Mortgage interest expense Interest Expense, Debt, Total Interest expense Marketable Securities, Gain (Loss) Net (loss) gain on marketable securities Net gain on marketable securities Unrealized Gain Loss On Other Investments And Derivative Instruments Net unrealized (loss) gain on other investments and derivative instruments The net change during the reporting period between the fair value and carrying value of other investments. Unrealized loss (gain) on other investments and derivative instruments The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period, also includes unrealised gain or loss on derivative instruments. Impairment Loss On Other Investments Impairment loss on other investments Amount of impairment losses on other specified investments recognized in earnings during the reporting period. Impairment loss on other investments Investment Income, Interest and Dividend Dividend and interest income Dividend and interest income Interest Expense, Other Trading and margin interest expense Trading and margin interest expense Trading and margin interest expense Nonoperating Income (Expense) Total other income(expense), net Other expense, net Income (Loss) From Continuing Operations Before Income Taxes, Extraordinary Items, Noncontrolling Interest Income (loss) before income taxes Income(loss) from continuing operations before income taxes Income Tax Expense (Benefit) Income tax (expense)benefit Income tax (expense)benefit Income tax (expense)benefit Income tax benefit (expense) Income (Loss) From Continuing Operations, Including Portion Attributable To Noncontrolling Interest Income(loss) from continuing operations Income(loss) from continuing operations Income (Loss) From Discontinued Operations, Net Of Tax, Including Portion Attributable To Noncontrolling Interest [Abstract] Discontinued operations: Discontinued Operation, Income (Loss) From Discontinued Operation, Before Income Tax Income from discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax, Total Discontinued Operation, Tax Effect Of Discontinued Operation Provision for income tax expense Discontinued Operation, Tax Effect of Discontinued Operation, Total Provision for income tax expense Income tax expense Income (Loss) From Discontinued Operations, Net Of Tax, Including Portion Attributable To Noncontrolling Interest Income from discontinued operations Income from discontinued operations Net Income (Loss), Including Portion Attributable To Noncontrolling Interest Net (loss) income Net income(loss) Net Income (Loss) Attributable To Noncontrolling Interest (Income)loss attributable to the noncontrolling interest (Income)loss attributable to the noncontrolling interest (Income)loss attributable to the noncontrolling interest Less: Net income attributable to the noncontrolling interest Net Income (Loss) Attributable To Parent Net income(loss) attributable to Intergroup Net (loss) income attributable to InterGroup Net Income(Loss) Per Share From Continuing Operations [Abstract] Net (loss) income per share from continuing operations Net Income (loss) Per Share From Continuing Operations Abtract Income (Loss) From Continuing Operations, Per Basic Share Basic (in dollars per share) Basic (in Dollers Per Shares) Income (Loss) From Continuing Operations, Per Diluted Share Diluted (in Dollers Per Shares) Diluted (in Dollars Per Share) Net Income Per Share From Discontinued Operations [Abstract] Net income per share from discontinued operations Net Income Per Share From Discontinued Operations Income (Loss) From Discontinued Operations, Net Of Tax, Per Basic Share Basic (in dollars per share) Basic (in Dollers Per Shares) Income (Loss) From Discontinued Operations, Net Of Tax, Per Diluted Share Diluted (in dollars per share) Diluted (in Dollers Per Shares) Net Income(Loss) Per Share Attributable To Intergroup [Abstract] Net loss per share attributable to InterGroup Net income(loss) per share attributable to InterGroup Earnings Per Share, Basic Basic (in dollars per share) Basic (in Dollers Per Shares) Earnings Per Share, Diluted Diluted (in dollars per share) Diluted (in Dollers Per Shares) Weighted Average Number Of Shares Outstanding, Basic Basic (in shares) Weighted average number of common shares outstanding (in Shares) Weighted Average Number Of Shares Outstanding, Diluted Diluted (in shares) Weighted average number of diluted common shares outstanding (in Shares) Statement Of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Net Cash Provided By (Used In) Operating Activities [Abstract] Cash flows from operating activities: Adjustments To Reconcile Net Income (Loss) To Cash Provided By (Used In) Operating Activities [Abstract] Adjustments to reconcile net (loss) income to net cash provided by operating activities: Depreciation, Depletion and Amortization Depreciation and amortization Depreciation and amortization Trading Securities, Change In Unrealized Holding Gain (Loss) Net unrealized loss (gain) on marketable securities Trading Securities, Change in Unrealized Holding Gain (Loss), Total Net unrealized loss (gain) on marketable securities Share-Based Compensation Stock compensation expense Stock compensation expense Increase (Decrease) In Operating Capital [Abstract] Changes in assets and liabilities: Increase (Decrease) In Trading Securities Investment in marketable securities Increase (Decrease) in Trading Securities, Total Investment in marketable securities Increase (Decrease) In Other Operating Assets Other assets Other assets Other assets Increase (Decrease) In Accounts Payable and Accrued Liabilities Accounts payable and other liabilities Accounts payable and other liabilities Increase (Decrease) In Due To Securities Broker Due to securities broker Net change during the reporting period in the carrying amount of due to securities broker. Increase (Decrease) In Obligations For Securities Sold Obligations for securities sold Net change during the reporting period in the carrying amount of obligations for securities sold. Increase (Decrease) In Income Taxes Payable Deferred taxes Deferred taxes Net Cash Provided By (Used In) Operating Activities Net cash (used in)provided by operating activities Net cash provided by operating activities Net Cash Provided By (Used In) Investing Activities [Abstract] Cash flows from investing activities: Payments To Acquire Property, Plant, and Equipment Investment in hotel Investment in hotel Investment in hotel Payments To Acquire Real Estate Held-For-Investment Investment in real estate Investment in real estate Proceeds (Payments) Other Investments Proceeds from other investments The cash inflow (outflow) associated with the sale or maturity (acquisition) of other investments not otherwise defined in the taxonomy. Increase (Decrease) In Restricted Cash Restricted cash Increase (Decrease) in Restricted Cash, Total Restricted cash Restricted cash Net Cash Provided By (Used In) Investing Activities Net cash used in investing activities Net cash used in investing activities Net Cash Provided By (Used In) Financing Activities [Abstract] Cash flows from financing activities: Repayments Of Mortgage Notes Principal payments on mortgage notes payable The cash outflow during the period towards repayment of borrowings supported by a written promise to pay an obligation that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). Principal payments on mortgage notes payable Repayments Of Other Debt Payments on other notes payable Payments on other notes payable Payments For Purchase Of Other Assets Purchase of treasury stock Purchase of treasury stock Purchase of treasury stock Net Cash Provided By (Used In) Financing Activities Net cash used in financing activities Net cash used in financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Net increase in cash and cash equivalents Supplemental Cash Flow Elements [Abstract] Supplemental information: Interest Paid Interest paid Interest paid Basis Of Presentation and Significant Accounting Policies [Abstract] Basis Of Presentation and Significant Accounting Policies [Abstract] Basis of Presentation and Significant Accounting Policies Basis Of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation and Significant Accounting Policies [Text Block] Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment Disclosure [Text Block] Real Estate and Accumulated Depreciation Disclosure [Abstract] Real Estate and Accumulated Depreciation Disclosure [Abstract] Real Estate and Accumulated Depreciation Disclosure [Text Block] Real Estate and Accumulated Depreciation Disclosure [Text Block] Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Investments In Debt and Marketable Equity Securities (And Certain Trading Assets) Disclosure [Text Block] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Other Investments [Abstract] Other Investments [Abstract] Other Investments Disclosure [Text Block] Other Investments Disclosure [Text Block] Disclosure relating to investments not specified separately in the taxonomy. Disclosure Text Block Supplement [Abstract] Disclosure Text Block Supplement [Abstract] Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value Disclosures [Text Block] Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure Of Compensation Related Costs, Share-Based Payments [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Disclosure [Text Block] Assets of Disposal Group, Including Discontinued Operation Properties held for sale Mortgage Notes Payable - Property Held For Sale Mortgage notes payable - property held for sale Carrying amount as of the balance sheet date of mortgage notes payable relating to property held for sale. Statement, Scenario [Axis] Statement, Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain]