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Consolidated Statements Of Comprehensive Income (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Statement of Comprehensive Income [Abstract] |  |  |
Net income | $ 9,672,498us-gaap_ProfitLoss | $ 14,796,738us-gaap_ProfitLoss | $ 11,190,907us-gaap_ProfitLoss
Other comprehensive income, before tax: |  |  |
Amortization (accretion) related to prior year service cost | 2,217us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax | (1,518)us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax | 9,396us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax
Amortization of unrecognized loss | 0us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax | 6,293us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax | 680us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
Accumulated postretirement (benefit) provision obligation adjustment | (47,121)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax | 77,213us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax | (82,918)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax
Unrealized gains on investments arising during the period | 2,848,256us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax | 3,959,623us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax | 3,190,737us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
Reclassification adjustment for sale of securities included in net income | (518,279)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax | (229,869)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax | (1,166,179)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
Reclassification adjustment for write-down of securities included in net income | 14,542us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesBeforeTax | 34,070us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesBeforeTax | 99,940us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesBeforeTax
Other | 0itic_ComprehensiveIncomeOther | 0itic_ComprehensiveIncomeOther | (36,600)itic_ComprehensiveIncomeOther
Other comprehensive income, before tax | 2,299,615us-gaap_OtherComprehensiveIncomeLossBeforeTax | 3,845,812us-gaap_OtherComprehensiveIncomeLossBeforeTax | 2,015,056us-gaap_OtherComprehensiveIncomeLossBeforeTax
Income tax (benefit) expense related to postretirement health benefits | (15,269)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax | 27,887us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax | (24,764)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax
Income tax expense related to unrealized gains on investments arising during the year | 974,145us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax | 1,354,439us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax | 1,122,003us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax
Income tax benefit related to reclassification adjustment for sale of securities included in net income | (173,403)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax | (78,622)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax | (426,017)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax
Income tax expense related to reclassification adjustment for write-down of securities included in net income | 5,037us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesTax | 13,134us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesTax | 34,569us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForWritedownOfSecuritiesTax
Net income tax expense on other comprehensive income | 790,510us-gaap_OtherComprehensiveIncomeLossTax | 1,316,838us-gaap_OtherComprehensiveIncomeLossTax | 705,791us-gaap_OtherComprehensiveIncomeLossTax
Other comprehensive income | 1,509,105us-gaap_OtherComprehensiveIncomeLossNetOfTax | 2,528,974us-gaap_OtherComprehensiveIncomeLossNetOfTax | 1,309,265us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive Income | 11,181,603us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 17,325,712us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest | 12,500,172us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
Less: Comprehensive income attributable to redeemable noncontrolling interest | (23,523)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | (88,528)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest | (88,411)us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
Comprehensive Income Attributable to the Company | $ 11,158,080us-gaap_ComprehensiveIncomeNetOfTax | $ 17,237,184us-gaap_ComprehensiveIncomeNetOfTax | $ 12,411,761us-gaap_ComprehensiveIncomeNetOfTax

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