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Related Party Transactions Company Repurchase of Common Stock from Related Parties (Details) (USD $)	9 Months Ended
	Sep. 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

X

- Details

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