| Name | USStatesAndPoliticalSubdivisionsMember |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
| Data type | nonnum:domainItemType |
| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| US States and Political Subdivisions Debt Securities [Member] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Bonds or similar securities issued by state, city, or local US governments or the agencies operated by state, city, or local governments. Debt securities issued by state governments may include bond issuances of US state authorities including, for example, but not limited to, housing authorities, dormitory authorities, and general obligations while debt securities issued by political subdivisions of US states would include, for example, debt issuances by county, borough, city, or municipal governments. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| Publisher | FASB | http://www.xbrl.org/2003/role/exampleRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/exampleRef |
| Topic | 715 | http://www.xbrl.org/2003/role/exampleRef |
| SubTopic | 20 | http://www.xbrl.org/2003/role/exampleRef |
| Section | 50 | http://www.xbrl.org/2003/role/exampleRef |
| Paragraph | 1 | http://www.xbrl.org/2003/role/exampleRef |
| Subparagraph | (d)(ii) | http://www.xbrl.org/2003/role/exampleRef |
| URI | http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 | http://www.xbrl.org/2003/role/exampleRef |
| Publisher | FASB | http://www.xbrl.org/2009/role/commonPracticeRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2009/role/commonPracticeRef |
| Topic | 944 | http://www.xbrl.org/2009/role/commonPracticeRef |
| SubTopic | 80 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Section | 50 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Paragraph | 1 | http://www.xbrl.org/2009/role/commonPracticeRef |
| Subparagraph | (e) | http://www.xbrl.org/2009/role/commonPracticeRef |
| URI | http://asc.fasb.org/extlink&oid=121641442&loc=d3e19393-158473 | http://www.xbrl.org/2009/role/commonPracticeRef |