| Name | OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentHeldtomaturitySecurities |
|---|---|
| Namespace | http://fasb.org/us-gaap/2020-01-31 |
| Prefix | us-gaap |
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| Period type | duration |
| Substitution Group | xbrli:item |
| Balance | debit |
| Nillable | True |
| Abstract | False |
| Text | Lang | Role | Container role |
|---|---|---|---|
| Other than Temporary Impairment Loss, Investments, Portion in Other Comprehensive Loss, Net of Tax, Attributable to Parent, Held-to-maturity Securities | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Other than Temporary Impairment Loss, Investments, Portion in Other Comprehensive Loss, Net of Tax, Attributable to Parent, Held-to-maturity Securities, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Amount after tax of amount of other than temporary impairment (OTTI) on investment in held-to-maturity debt security, recognized in other comprehensive loss, attributable to parent entity. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |
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|---|---|---|
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| Name | Accounting Standards Codification | http://fasb.org/us-gaap/role/ref/legacyRef |
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| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestHeldtomaturitySecurities | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfOtherComprehensiveIncomeAlternative | |
us-gaap:OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterestHeldtomaturitySecurities | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfOtherComprehensiveIncomeAlternative |
| Name | Relation Type | Role | |
|---|---|---|---|
us-gaap:OtherThanTemporaryImpairmentLossInvestmentsPortionInOtherComprehensiveLossNetOfTaxAttributableToParentHeldToMaturitySecuritiesAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfOtherComprehensiveIncomeAlternative | |
us-gaap:OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfOtherComprehensiveIncomeAlternative | |
us-gaap:OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfOtherComprehensiveIncomeSecondAlternative |