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Commitments And Contingencies (Details) (USD $) | Dec. 31, 2012 | Dec. 31, 2011
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Commitments And Contingencies [Abstract] |  |
Contingently liable amount for Escrow and trust deposits | $ 11,689,000 | $ 15,562,000
Like-kind exchange deposits and reverse exchange property | $ 55,580,000 | $ 35,359,000

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- Definition Cash held for Escrow and trust deposits + References No definition available. + Details
Name: | itic_CashHeldForEscrowAndTrustDeposits
Namespace Prefix: | itic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Like-kind exchange deposits and reverse exchange property + References No definition available. + Details
Name: | itic_LikeKindExchangeDepositsAndReverseExchangeProperty
Namespace Prefix: | itic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration