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v3.21.2

Property and Casualty Insurance Activity (Details 5) | 13 Months Ended
--- | ---
Dec. 30, 2020
Quota share treaty: |
Percent ceded | 25.00%

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

X
- Definition Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration