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Fair Value Measurement Schedule Of Assumptions Used To Determine Fair Value (Details) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012
Fair Value Disclosures [Abstract] |  |
Cumulative probability of earning maximum rate until maturity | 0.00% | 0.00%
Cumulative probability of principle returned prior to maturity | 95.80% | 96.10%
Cumulative probability of default at some future point | 4.30% | 3.90%

X
- Definition Percentage of cumulative probability of default at some future point + References No definition available. + Details
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X
- Definition Percentage of cumulative probability of earning maximum rate until maturity + References No definition available. + Details
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X
- Definition Percentage of cumulative probability of principle returned prior to maturity + References No definition available. + Details
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Namespace Prefix: | itic_
Data Type: | num:percentItemType
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X
- Details
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