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Disclosures About Offsetting Assets and Liabilities - Financial Liabilities and Derivative Liabilities that are Subject to Offset (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Offsetting Liabilities [Line Items] |  |
Gross amounts of recognized liabilities, Securities lending | $ (104,570) | $ (68,105)
Net amounts presented in the Statement of Financial Condition, Securities lending | (104,570) | (68,105)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities lending | (23,613) | 46,647
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities lending | 80,956 | 21,448
Securities lending, Net amount | (1) | (10)
Gross amounts of recognized liabilities, Securities purchased under agreements to resell | (408,950) | (212,011)
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell | (408,950) | (212,011)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell | 19,706 | 12,028
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities purchased under agreements to resell | 389,244 | 199,983
Gross amounts of recognized liabilities | (679,535) | (422,144)
Net amounts presented in the Statement of Financial Condition | (679,535) | (422,144)
Gross amounts not offset in the Statement of Financial Position, Financial instruments | (44,805) | 60,634
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged | 522,853 | 247,281
Net amount | (111,877) | (114,229)
Interest Rate Contract [Member] |  |
Offsetting Liabilities [Line Items] |  |
Gross amounts of recognized liabilities | (166,015) | (142,028)
Net amounts presented in the Statement of Financial Condition | (166,015) | (142,028)
Gross amounts not offset in the Statement of Financial Position, Financial instruments | 1,486 | 1,959
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged | 52,653 | 25,850
Offsetting liability interest rate contracts net | $ 111,876 | $ (114,219)

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