v3.26.1
Disclosures About Offsetting Assets and Liabilities - Financial Liabilities and Derivative Liabilities that are Subject to Offset (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2024
 [2]
Offsetting Liabilities [Line Items]      
Gross amounts of recognized liabilities, Securities lending [1] $ (509,368) $ (252,137)  
Net amounts presented in the Statement of Financial Condition, Securities lending [1] (509,368) (252,137)  
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities lending [1] 28,736 36,328  
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities lending [1] 475,718 215,809  
Securities lending, Net amount [1] (4,914)    
Gross amounts of recognized liabilities, Securities purchased under agreements to resell [2] (862,954) (651,236)  
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell (862,954) [2] (651,236) $ (651,236)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell [2] 5,463 15,198  
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities purchased under agreements to resell [2] 857,491 636,038  
Gross amounts of recognized liabilities (1,437,892) (974,684)  
Net amounts presented in the Statement of Financial Condition (1,437,892) (974,684)  
Gross amounts not offset in the Statement of Financial Position, Financial instruments 44,258 74,733  
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged 1,353,956 891,466  
Net amount (39,678) (8,485)  
Interest Rate Contracts [Member]      
Offsetting Liabilities [Line Items]      
Gross amounts of recognized liabilities [3] (65,570) (71,311)  
Net amounts presented in the Statement of Financial Condition [3] (65,570) (71,311)  
Gross amounts not offset in the Statement of Financial Position, Financial instruments [3] 10,059 23,207  
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged [3] 20,747 39,619  
Offsetting liability interest rate contracts net [3] $ (34,764) $ (8,485)  
[1] Securities lending transactions are included in payables to brokers, dealers, and clearing organizations on the consolidated statements of financial condition.
[2] Collateral pledged includes the fair value of securities pledged to the counterparty. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counterparty includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $901.1 million and $687.2 million at March 31, 2026 and December 31, 2025, respectively.
[3] Collateral pledged includes the fair value of securities pledged to the counterparty. There were no securities pledged as collateral at March 31, 2026 or December 31, 2025.