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Balance Sheet Offsetting Balance Sheet Offsetting - Remaining Contractual Maturity of the Securities Sold Under Agreement to Repurchase (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Remaining Contractual Maturity of the Securities Sold Under Agreement to Repurchase [Line Items] |  |
Remaining contractual maturity of the agreements overnight and continuous | $ 4,014,037 | $ 4,127,188
Remaining contractual maturity of the agreements up to 30 Days | 0 | 0
Remaining contractual maturity of the agreements 30 to 90 Days | 0 | 0
Remaining contractual maturity of the agreements greater than 90 Days | 0 | 0
Remaining contractual maturity of the agreements total | 4,014,037 | 4,127,188
Securities Sold under Agreements to Repurchase, Gross | 4,014,037 | 4,127,188
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities | 0 | 0
US Treasury Securities [Member] |  |
Remaining Contractual Maturity of the Securities Sold Under Agreement to Repurchase [Line Items] |  |
Remaining contractual maturity of the agreements overnight and continuous | 2,072,367 | 3,300,662
Remaining contractual maturity of the agreements up to 30 Days | 0 | 0
Remaining contractual maturity of the agreements 30 to 90 Days | 0 | 0
Remaining contractual maturity of the agreements greater than 90 Days | 0 | 0
Remaining contractual maturity of the agreements total | 2,072,367 | 3,300,662
Residential Mortgage Backed Securities [Member] |  |
Remaining Contractual Maturity of the Securities Sold Under Agreement to Repurchase [Line Items] |  |
Remaining contractual maturity of the agreements overnight and continuous | 1,941,670 | 826,526
Remaining contractual maturity of the agreements up to 30 Days | 0 | 0
Remaining contractual maturity of the agreements 30 to 90 Days | 0 | 0
Remaining contractual maturity of the agreements greater than 90 Days | 0 | 0
Remaining contractual maturity of the agreements total | $ 1,941,670 | $ 826,526

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- Definition Amount of right to receive securities collateral under master netting arrangements that have not been offset against securities sold under agreement to repurchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 55 -Paragraph 13 -SubTopic 20 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483444/210-20-55-13 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483444/210-20-55-20 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483466/210-20-50-3 + Details
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- Definition Amount, before effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483466/210-20-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483444/210-20-55-7 + Details
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