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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, 2024 | Dec. 31, 2023
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Offsetting Liabilities [Line Items] |  |
Gross amounts of recognized liabilities, Securities lending | $ (152,255) | $ (135,693)
Net amounts presented in the Statement of Financial Condition, Securities lending | (152,255) | (135,693)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities lending | 83,345 | 23,691
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities lending | 68,910 | 111,981
Securities lending, Net amount | 0 | (21)
Gross amounts of recognized liabilities, Securities purchased under agreements to resell | (657,984) | (417,644)
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell | (657,984) | (417,644)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell | 4,079 | 23,441
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities purchased under agreements to resell | 653,905 | 394,203
Gross amounts of recognized liabilities | (905,553) | (671,988)
Net amounts presented in the Statement of Financial Condition | (905,553) | (671,988)
Gross amounts not offset in the Statement of Financial Position, Financial instruments | 112,369 | 61,688
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged | 738,268 | 528,845
Net amount | (54,916) | (81,455)
Interest Rate Contracts [Member] |  |
Offsetting Liabilities [Line Items] |  |
Gross amounts of recognized liabilities | (95,314) | (118,651)
Net amounts presented in the Statement of Financial Condition | (95,314) | (118,651)
Gross amounts not offset in the Statement of Financial Position, Financial instruments | 24,945 | 14,556
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged | 15,453 | 22,661
Offsetting liability interest rate contracts net | $ (54,916) | $ (81,434)

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