cm:Concept: us-gaap:InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits
| Interest Expense, Negotiable Order of Withdrawal (NOW) Deposits |
| us-gaap:InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits |
| Interest expense incurred on the amount of Negotiable Order of Withdrawal (NOW). Interest-bearing transaction account that combines the payable on demand feature of checks and investment feature of savings accounts. A NOW account is functionally an interest paying checking account. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:InterestExpenseNegotiableOrderOfWithdrawalNOWDeposits |