XML 17 R37.htm IDEA: XBRL DOCUMENT v2.4.1.9
SEGMENT INFORMATION (Details) (USD $)
3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2014
Segment Reporting Information [Line Items]          
Revenues $ 18,132,000us-gaap_Revenues $ 15,873,000us-gaap_Revenues $ 55,233,000us-gaap_Revenues $ 49,688,000us-gaap_Revenues  
Segment operating expenses (14,560,000)us-gaap_OperatingExpenses (13,095,000)us-gaap_OperatingExpenses (44,504,000)us-gaap_OperatingExpenses (46,054,000)us-gaap_OperatingExpenses  
Segment income (loss) from operations 2,314,000us-gaap_OperatingIncomeLoss 1,748,000us-gaap_OperatingIncomeLoss 7,013,000us-gaap_OperatingIncomeLoss 136,000us-gaap_OperatingIncomeLoss  
Interest expense - mortgage (2,539,000)us-gaap_InterestExpenseDebt (2,511,000)us-gaap_InterestExpenseDebt (7,714,000)us-gaap_InterestExpenseDebt (5,447,000)us-gaap_InterestExpenseDebt  
Interest expense - occupancy tax     0intg_InterestExpensesForOccupancyTax (328,000)intg_InterestExpensesForOccupancyTax  
Loss on extinguishment of debt     0us-gaap_GainsLossesOnExtinguishmentOfDebt (3,910,000)us-gaap_GainsLossesOnExtinguishmentOfDebt  
Loss on disposal of assets     (51,000)us-gaap_GainLossOnDispositionOfAssets1 (1,092,000)us-gaap_GainLossOnDispositionOfAssets1  
Gain on sale of real estate 9,358,000us-gaap_GainsLossesOnSalesOfOtherRealEstate 0us-gaap_GainsLossesOnSalesOfOtherRealEstate 11,100,000us-gaap_GainsLossesOnSalesOfOtherRealEstate 0us-gaap_GainsLossesOnSalesOfOtherRealEstate  
Other real estate income     458,000us-gaap_OtherRealEstateRevenue 0us-gaap_OtherRealEstateRevenue  
Depreciation and amortization expense (1,258,000)us-gaap_DepreciationDepletionAndAmortization (1,030,000)us-gaap_DepreciationDepletionAndAmortization (3,716,000)us-gaap_DepreciationDepletionAndAmortization (3,498,000)us-gaap_DepreciationDepletionAndAmortization  
Gain (loss) from investments (2,201,000)us-gaap_IncomeLossFromEquityMethodInvestments 22,000us-gaap_IncomeLossFromEquityMethodInvestments (5,644,000)us-gaap_IncomeLossFromEquityMethodInvestments 407,000us-gaap_IncomeLossFromEquityMethodInvestments  
Income tax expense (2,930,000)us-gaap_IncomeTaxExpenseBenefit 177,000us-gaap_IncomeTaxExpenseBenefit (2,672,000)us-gaap_IncomeTaxExpenseBenefit 2,194,000us-gaap_IncomeTaxExpenseBenefit  
Net income (loss) 4,002,000us-gaap_ProfitLoss (564,000)us-gaap_ProfitLoss 2,490,000us-gaap_ProfitLoss (8,040,000)us-gaap_ProfitLoss  
Total assets 144,904,000us-gaap_Assets 162,073,000us-gaap_Assets 144,904,000us-gaap_Assets 162,073,000us-gaap_Assets 165,460,000us-gaap_Assets
Hotel Operations [Member]          
Segment Reporting Information [Line Items]          
Revenues 13,983,000us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
11,849,000us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
42,857,000us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
37,428,000us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Segment operating expenses (11,997,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(10,320,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(35,868,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(37,724,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Segment income (loss) from operations 1,986,000us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
1,529,000us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
6,989,000us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(296,000)us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Interest expense - mortgage (1,785,000)us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(1,766,000)us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(5,450,000)us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(3,168,000)us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Interest expense - occupancy tax       (328,000)intg_InterestExpensesForOccupancyTax
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Loss on extinguishment of debt       (3,910,000)us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Loss on disposal of assets     (51,000)us-gaap_GainLossOnDispositionOfAssets1
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(1,092,000)us-gaap_GainLossOnDispositionOfAssets1
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Gain on sale of real estate 0us-gaap_GainsLossesOnSalesOfOtherRealEstate
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
  0us-gaap_GainsLossesOnSalesOfOtherRealEstate
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
   
Other real estate income     0us-gaap_OtherRealEstateRevenue
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
   
Depreciation and amortization expense (744,000)us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(491,000)us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(2,149,000)us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(1,887,000)us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Gain (loss) from investments 0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Income tax expense 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Net income (loss) (543,000)us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(728,000)us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(661,000)us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
(10,681,000)us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Total assets 49,819,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
48,042,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
49,819,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
48,042,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_HotelMember
 
Real Estate Operations [Member]          
Segment Reporting Information [Line Items]          
Revenues 4,149,000us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
4,024,000us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
12,376,000us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
12,260,000us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Segment operating expenses (1,947,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
(2,194,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
(6,279,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
(6,738,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Segment income (loss) from operations 2,202,000us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
1,830,000us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
6,097,000us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
5,522,000us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Interest expense - mortgage (754,000)us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
(745,000)us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
(2,264,000)us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
(2,279,000)us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Interest expense - occupancy tax       0intg_InterestExpensesForOccupancyTax
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Loss on extinguishment of debt       0us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Loss on disposal of assets     0us-gaap_GainLossOnDispositionOfAssets1
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
0us-gaap_GainLossOnDispositionOfAssets1
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Gain on sale of real estate 9,358,000us-gaap_GainsLossesOnSalesOfOtherRealEstate
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
  11,100,000us-gaap_GainsLossesOnSalesOfOtherRealEstate
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
   
Other real estate income     458,000us-gaap_OtherRealEstateRevenue
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
   
Depreciation and amortization expense (514,000)us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
(539,000)us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
(1,567,000)us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
(1,611,000)us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Gain (loss) from investments 0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Income tax expense 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Net income (loss) 10,292,000us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
546,000us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
13,824,000us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
1,632,000us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Total assets 56,123,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
64,135,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
56,123,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
64,135,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_ApartmentBuildingMember
 
Investment Transactions [Member]          
Segment Reporting Information [Line Items]          
Revenues 0us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Segment operating expenses 0us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Segment income (loss) from operations 0us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Interest expense - mortgage 0us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Interest expense - occupancy tax       0intg_InterestExpensesForOccupancyTax
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Loss on extinguishment of debt       0us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Loss on disposal of assets     0us-gaap_GainLossOnDispositionOfAssets1
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_GainLossOnDispositionOfAssets1
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Gain on sale of real estate 0us-gaap_GainsLossesOnSalesOfOtherRealEstate
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
  0us-gaap_GainsLossesOnSalesOfOtherRealEstate
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
   
Other real estate income     0us-gaap_OtherRealEstateRevenue
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
   
Depreciation and amortization expense 0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Gain (loss) from investments (2,201,000)us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
22,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
(5,644,000)us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
407,000us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Income tax expense 0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
0us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Net income (loss) (2,201,000)us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
22,000us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
(5,644,000)us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
407,000us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Total assets 24,332,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
26,333,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
24,332,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
26,333,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= intg_InvestmentTransactionsMember
 
Other [Member]          
Segment Reporting Information [Line Items]          
Revenues 0us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_Revenues
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Segment operating expenses (616,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
(581,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
(2,357,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
(1,592,000)us-gaap_OperatingExpenses
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Segment income (loss) from operations (616,000)us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
(581,000)us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
(2,357,000)us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
(1,592,000)us-gaap_OperatingIncomeLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Interest expense - mortgage 0us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_InterestExpenseDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Interest expense - occupancy tax       0intg_InterestExpensesForOccupancyTax
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Loss on extinguishment of debt       0us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Loss on disposal of assets     0us-gaap_GainLossOnDispositionOfAssets1
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_GainLossOnDispositionOfAssets1
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Gain on sale of real estate 0us-gaap_GainsLossesOnSalesOfOtherRealEstate
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
  0us-gaap_GainsLossesOnSalesOfOtherRealEstate
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
   
Other real estate income     0us-gaap_OtherRealEstateRevenue
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
   
Depreciation and amortization expense 0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_DepreciationDepletionAndAmortization
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Gain (loss) from investments 0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
0us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Income tax expense (2,930,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
177,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
(2,672,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
2,194,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Net income (loss) (3,546,000)us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
(404,000)us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
(5,029,000)us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
602,000us-gaap_ProfitLoss
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
 
Total assets $ 14,630,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
$ 23,563,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
$ 14,630,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember
$ 23,563,000us-gaap_Assets
/ us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis
= us-gaap_OtherPropertyMember