| Standard label: | Retained Earnings, Appropriated |
| Name: | us-gaap:RetainedEarningsAppropriated |
| Documentation: | A segregation of retained earnings which is unavailable for dividend distribution. Includes also retained earnings appropriated for loss contingencies. |
| Object type: | cm:Concept |
| Data type: | Monetary (xbrli:monetaryItemType) |
| Period type: | As Of (instant) |
| Balance type: | Credit |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:RetainedEarningsAppropriated |
| Label | Role | Language |
| Retained Earnings, Appropriated | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 210 10 S99 1 (SX 210.5-03(30)(a)(3)(ii)) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 |
| FASB Accounting Standards Codification 505 10 45 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 505 |
| FASB Accounting Standards Codification 505 10 45 4 | http://fasb.org/us-gaap/role/ref/legacyRef | 505 |
| FASB Accounting Standards Codification 944 210 S99 1 (SX 210.7-03(23)(a)(4)(i)) | http://fasb.org/us-gaap/role/ref/legacyRef | 944 |
| Part Of Roll Up: |
| us-gaap:RetainedEarningsAccumulatedDeficit |