| Standard label: | Interest Income (Expense), after Provision for Loan Loss |
| Name: | us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss |
| Documentation: | Amount of interest income or expense, including any amortization and accretion (as applicable) of discounts and premiums, including consideration of the provisions for loan, lease, credit, and other related losses. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | For Period (duration) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss |
| Label | Role | Language |
| Interest Income (Expense), after Provision for Loan Loss | http://www.xbrl.org/2003/role/label | en-US |
| Interest Income (Expense), after Provision for Loan Loss, Total | http://www.xbrl.org/2003/role/totalLabel | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 942 220 S99 1 (SX 210.9-04.12) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |