| Standard label: | Resale Agreement Counterparty, Weighted Average Maturity of Agreements |
| Name: | us-gaap:ResaleAgreementCounterpartyWeightedAverageMaturityOfAgreements1 |
| Documentation: | Weighted average maturity (weighted by amount of the agreement) of resale agreements with the counterparty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. |
| Object type: | cm:Concept |
| Data type: | xbrli:durationItemType |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ResaleAgreementCounterpartyWeightedAverageMaturityOfAgreements1 |
| Label | Role | Language |
| Resale Agreement Counterparty, Weighted Average Maturity of Agreements | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 235 10 S99 1 (SX 210.4-08.(m)(2)(ii)) | http://fasb.org/us-gaap/role/ref/legacyRef | 235 |