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Retirement Agreements and Other Postretirement Benefit Plan Effects on Net Periodic Postretirement Benefit Cost and Accumulated Postretirement Benefit Obligation (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract] |  |
One-Percent Point Increase: Effect on the service cost component | $ 4,386itic_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceCostComponent |
One-Percent Point Increase: Effect on interest cost | 6,819itic_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnInterestCostComponent |
One-Percent Point Increase: Total effect on the net periodic postretirement benefit cost | 11,205us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents |
One-Percent Point Decrease: Effect on the service cost component |  | (3,344)itic_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceCostComponents
One-Percent Point Decrease: Effect on interest cost |  | (5,267)itic_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnInterestCostComponents
One-Percent Point Decrease: Total effect on the net periodic postretirement benefit cost |  | (8,611)us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1
One-Percent Point Increase: Effect on those currently receiving benefits (retirees and spouses) | 0itic_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligationCurrentlyReceivingBenefits |
One-Percent Point Increase: Effect on active fully eligible | 75,677itic_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligationActiveFullyEligible |
One-Percent Point Increase: Effect on actives not yet eligible | 94,798itic_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligationActivesNotYetEligible |
One-Percent Point Increase: Total effect on the accumulated postretirement benefit obligation | 170,475us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation |
One-Percent Point Decrease: Effect on those currently receiving benefits (retirees and spouses) |  | 0itic_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligationCurrentlyReceivingBenefits
One-Percent Point Decrease: Effect on active fully eligible |  | (59,919)itic_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligationActiveFullyEligible
One-Percent Point Decrease: Effect on actives not yet eligible |  | (72,309)itic_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligationActivesNotYetEligible
One-Percent Point Decrease: Total effect on the accumulated postretirement benefit obligation |  | $ (132,228)us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1

X
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- Definition Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation, Actives Not Yet Eligible + References No definition available. + Details
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- Definition Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation, Currently Receiving Benefits + References No definition available. + Details
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- Definition Defined Benefit Plan, Effect of One Percentage Point Decrease on Interest Cost Components + References No definition available. + Details
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- Definition Defined Benefit Plan, Effect of One Percentage Point Decrease on Service Cost Components + References No definition available. + Details
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- Definition Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation, Active Fully Eligible + References No definition available. + Details
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- Definition Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation, Actives Not Yet Eligible + References No definition available. + Details
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- Definition Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The effect of a one-percentage-point increase in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (m) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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