cm:Concept: us-gaap:FiniteLivedCoreDepositsGross
| Finite-Lived Core Deposits, Gross |
| us-gaap:FiniteLivedCoreDepositsGross |
| Bank deposits belonging to an acquired bank that can be counted on as a stable source of lending funds. These deposits have the following attributes: predictable costs and low sensitivity to interest rates. This intangible asset is usually amortized over its estimated useful life. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Debit |
| false |
| us-gaap:FiniteLivedCoreDepositsGross |