Earnings Per Common Share and Share Awards Schedule of Weighted Average Grant Date Fair Value of Stock Awards Plans (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Weighted-average market price	$ 71.59	$ 50.50	$ 41.50
Weighted-average grant-date fair value	$ 27.55	$ 18.84	$ 15.55

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Grant Date Fair Value

No definition available.

Name:	itic_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValue
Namespace Prefix:	itic_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant