Commitments And Contingencies (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Like-kind exchange deposits and reverse exchange property	$ 103,658,000	$ 82,477,000

Like-kind exchange deposits and reverse exchange property

No definition available.

Name:	itic_LikeKindExchangeDepositsAndReverseExchangeProperty
Namespace Prefix:	itic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant