| Standard label: | Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] |
| Name: | us-gaap:ScheduleOfEarningsPerShareDilutedByCommonClassTable |
| Documentation: | Complete disclosure pertaining to an entity's diluted earnings per share. |
| Object type: | cm:Table |
| Data type: | Text/String (xbrli:stringItemType) |
| Period type: | For Period (duration) |
| Balance type: | (no balance type) |
| Abstract: | true |
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:ScheduleOfEarningsPerShareDilutedByCommonClassTable |
| Label | Role | Language |
| Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] | http://www.xbrl.org/2003/role/label | en-US |
| Reference | Role | Topic |
| FASB Accounting Standards Codification 220 10 S99 2 (SX 210.5-03.21) | http://fasb.org/us-gaap/role/ref/legacyRef | 220 |
| FASB Accounting Standards Codification 260 10 50 1 (a) | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |
| FASB Accounting Standards Codification 260 10 45 2 | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |
| FASB Accounting Standards Codification 260 10 45 3 | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |
| FASB Accounting Standards Codification 260 10 45 5 | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |
| FASB Accounting Standards Codification 260 10 55 52 | http://fasb.org/us-gaap/role/ref/legacyRef | 260 |