| Standard label: | Business Combination, Bargain Purchase, Gain Recognized, Description |
| Name: | us-gaap:BusinessCombinationBargainPurchaseGainRecognizedDescription |
| Documentation: | In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents a description of the reasons why the transaction resulted in a gain. |
| Object type: | cm:Concept |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | false |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:BusinessCombinationBargainPurchaseGainRecognizedDescription |
| Label | Role | Language |
| Business Combination, Bargain Purchase, Gain Recognized, Description | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 805 30 50 1 (f)(2) | http://fasb.org/us-gaap/role/ref/legacyRef | 805 |
| FASB Accounting Standards Codification 805 30 25 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 805 |
| FASB Accounting Standards Codification 805 30 25 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 805 |
| FASB Accounting Standards Codification 805 30 25 4 | http://fasb.org/us-gaap/role/ref/legacyRef | 805 |
| FASB Accounting Standards Codification 805 30 30 5 | http://fasb.org/us-gaap/role/ref/legacyRef | 805 |
| FASB Accounting Standards Codification 805 30 30 6 | http://fasb.org/us-gaap/role/ref/legacyRef | 805 |