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|---|---|
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| Data type | nonnum:domainItemType |
| Period type | duration |
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| Balance | None |
| Nillable | True |
| Abstract | True |
| Text | Lang | Role | Container role |
|---|---|---|---|
| AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), attributable to parent. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
| Name | Value | Role |
|---|---|---|
| PublishDate | 2020-01 | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| Source | Taxonomy Implementation Guide | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
| SourceName | Other Comprehensive Income (including selected financial statements) | http://fasb.org/us-gaap/role/tin/taxonomyImplementationNote |
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| SourceName | Financial Instruments-Credit Losses | http://fasb.org/srt/role/changeNote/changeNote |
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| ChangeDate | 2018-09 | http://fasb.org/srt/role/changeNote/changeNote |
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| Source_ASU_Number | 2016-13 | http://fasb.org/srt/role/changeNote/changeNote |
| SourceName | Financial Instruments-Recognition and Measurement | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2018 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2017-08 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedReferences | true | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedDocumentation | true | http://fasb.org/srt/role/changeNote/changeNote |
| PreviousDocumentation | Accumulated other comprehensive income (loss) resulting from the appreciation (depreciation) in value of securities attributable to the parent. | http://fasb.org/srt/role/changeNote/changeNote |
| Source_ASU_Number | 2016-01 | http://fasb.org/srt/role/changeNote/changeNote |
| Publisher | FASB | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/disclosureRef |
| Topic | 220 | http://www.xbrl.org/2003/role/disclosureRef |
| SubTopic | 10 | http://www.xbrl.org/2003/role/disclosureRef |
| Section | 45 | http://www.xbrl.org/2003/role/disclosureRef |
| Paragraph | 10A | http://www.xbrl.org/2003/role/disclosureRef |
| Subparagraph | (f) | http://www.xbrl.org/2003/role/disclosureRef |
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| Section | 45 | http://www.xbrl.org/2003/role/disclosureRef |
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| Section | 45 | http://www.xbrl.org/2003/role/disclosureRef |
| Paragraph | 14A | http://www.xbrl.org/2003/role/disclosureRef |
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| Section | 45 | http://www.xbrl.org/2003/role/disclosureRef |
| Paragraph | 10A | http://www.xbrl.org/2003/role/disclosureRef |
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| Name | Accounting Standards Codification | http://www.xbrl.org/2003/role/disclosureRef |
| Topic | 220 | http://www.xbrl.org/2003/role/disclosureRef |
| SubTopic | 10 | http://www.xbrl.org/2003/role/disclosureRef |
| Section | 45 | http://www.xbrl.org/2003/role/disclosureRef |
| Paragraph | 17B | http://www.xbrl.org/2003/role/disclosureRef |
| URI | http://asc.fasb.org/extlink&oid=121641772&loc=SL34724394-108580 | http://www.xbrl.org/2003/role/disclosureRef |
| Name | Relation Type | Role | |
|---|---|---|---|
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us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossParentMember | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncome | |
us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossParentMember | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncomeStatementTable | |
us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossParentMember | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncomeStatementTable | |
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us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossParentMember | parent-child | http://fasb.org/us-gaap/role/disclosure/Equity | |
us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithAllowanceForCreditLossParentMember | domain-member | http://fasb.org/us-gaap/role/disclosure/EquityAccumulatedOtherComprehensiveIncomeLossTable | |
us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossParentMember | domain-member | http://fasb.org/us-gaap/role/disclosure/EquityAccumulatedOtherComprehensiveIncomeLossTable | |
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us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossParentMember | parent-child | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceA | |
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us-gaap:AociGainLossDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossParentMember | domain-member | http://fasb.org/us-gaap/role/disclosure/FinancialServicesInsuranceANewAccountingPronouncementsOrChangeInAccountingPrincipleTable |