XML 50 R39.htm IDEA: XBRL DOCUMENT
v3.21.2

RISKS AND UNCERTAINTIES (Details) | 6 Months Ended
--- | ---
Jun. 30, 2021
RISKS AND UNCERTAINTIES |
Debt to adjusted EBITDA ratio | 3.25

X
- Definition Adjusted ration of debt to earnings before interest, taxes, depreciation and amortization. + References No definition available. + Details
Name: | iii_AdjustedRatioOfDebtToEarningsBeforeInterestTaxesDepreciationAndAmortization
Namespace Prefix: | iii_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RisksAndUncertaintiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration