| Standard label: | Debt Securities, Held-to-maturity, 90 Days or More Past Due, Still Accruing |
| Name: | us-gaap:DebtSecuritiesHeldToMaturity90DaysOrMorePastDueStillAccruing |
| Documentation: | Amount of investment in debt security measured at amortized cost (held-to-maturity), 90 days or more past due and still accruing. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Debit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:DebtSecuritiesHeldToMaturity90DaysOrMorePastDueStillAccruing |
| Label | Role | Language |
| Debt Securities, Held-to-maturity, 90 Days or More Past Due, Still Accruing | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 326 20 50 16 (c) | http://www.xbrl.org/2003/role/disclosureRef | 326 |