| Standard label: | Loan Lending Commitment Arrangement Fees [Member] |
| Name: | us-gaap:LoanLendingCommitmentArrangementFeesMember |
| Documentation: | Category of deferred revenue by arrangement wherein fees are received in advance for a commitment to originate a loan or lease or purchase a loan or group of loans or leases. |
| Object type: | cm:Member |
| Data type: | [Member] (nonnum:domainItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:LoanLendingCommitmentArrangementFeesMember |
| Label | Role | Language |
| Loan Lending Commitment Arrangement Fees [Member] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 310 20 45 2 | http://fasb.org/us-gaap/role/ref/otherTransitionRef | 310 |