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Related Party Transactions Company Repurchase of Common Stock from Related Parties (Details) (USD $) | 3 Months Ended
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Jun. 30, 2013
Related Party Transactions [Abstract] |
Treasury stock shares acquired from Company officers | 17,524
Treasury stock acquired from Company officers (dollars per share) | $ 71.50

X
- Definition Number of shares of Company common stock repurchased from officers of the Company + References No definition available. + Details
Name: | itic_TreasuryStockSharesAcquiredFromCompanyOfficers
Namespace Prefix: | itic_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cost per share of Company common stock repurchased from officers of the Company + References No definition available. + Details
Name: | itic_TreasuryStockSharesAcquiredFromCompanyOfficersCostPerShare
Namespace Prefix: | itic_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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