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Commitments And Contingencies (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
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

X

- 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

X

- 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

X

- Details

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