| Standard label: | Gain (Loss) on Sale of Mortgage Loans |
| Name: | us-gaap:GainLossOnSaleOfMortgageLoans |
| Documentation: | The gains (losses) included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. |
| 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:GainLossOnSaleOfMortgageLoans |
| Label | Role | Language |
| Gain (Loss) on Sale of Mortgage Loans | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 230 10 45 28 (b) | http://fasb.org/us-gaap/role/ref/legacyRef | 230 |
| FASB Accounting Standards Codification 944 310 45 1 | http://www.xbrl.org/2003/role/disclosureRef | 944 |
| FASB Accounting Standards Codification 944 310 50 1 | http://www.xbrl.org/2003/role/disclosureRef | 944 |
| FASB Accounting Standards Codification 944 310 45 2 | http://www.xbrl.org/2003/role/disclosureRef | 944 |
| Part Of Roll Up: |
| us-gaap:GainLossOnSalesOfLoansNet |