Annual report [Section 13 and 15(d), not S-K Item 405]

Offsetting Assets and Liabilities (Details)

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Offsetting Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Offsetting Derivative Assets [Abstract]    
Derivative assets, gross amounts of recognized assets (liabilities) $ 136,014 $ 244,270
Derivative assets, gross amounts offset in the balance sheets (48,465) (234,156)
Derivative assets, net amounts of assets (liabilities) presented in the balance sheets 87,549 10,114
Derivative assets, gross amounts not offset with financial assets (liabilities) in the balance sheets, financial instruments (4,254) (10,114)
Derivative assets, gross amounts not offset with financial assets (liabilities) in the balance sheets, cash collateral (received) pledged 0 0
Derivative assets, gross amounts not offset with financial assets (liabilities) in the balance sheets, net amount 83,295 0
Offsetting Securities Purchased under Agreements to Resell [Abstract]    
Reverse repurchase agreements, gross amounts of recognized assets (liabilities) 157,120 355,975
Reverse repurchase agreements, gross amounts offset in the balance sheets 0 0
Reverse repurchase agreements, net amounts of assets (liabilities) presented in the balance sheets 157,120 355,975
Reverse repurchase agreements, gross amounts not offset with financial assets (liabilities) in the balance sheets, financial instruments 0 0
Reverse repurchase agreements, gross amounts not offset with financial assets (liabilities) in the balance sheets, cash collateral (received) pledged (146,445) (354,654)
Reverse repurchase agreements, gross amounts not offset with financial assets (liabilities) in the balance sheets, net amount 10,675 1,321
Offsetting Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed [Abstract]    
Total assets, gross amounts of recognized assets (liabilities) 293,134 600,245
Total assets, gross amounts offset in the balance sheets (48,465) (234,156)
Total assets, net amounts of assets (liabilities) presented in the balance sheets 244,669 366,089
Total assets, gross amounts not offset with financial assets (liabilities) in the balance sheets, financial instruments (4,254) (10,114)
Total assets, gross amounts not offset with financial assets (liabilities) in the balance sheets, cash collateral (received) pledged (146,445) (354,654)
Total assets, gross amounts not offset with financial assets (liabilities) in the balance sheets, net amount 93,970 1,321
Offsetting Securities Sold under Agreements to Repurchase [Abstract]    
Repurchase agreements, gross amounts of recognized assets (liabilities) (7,255,540) (7,805,057)
Repurchase agreements, gross amounts offset in the balance sheets 0 0
Repurchase agreements, net amounts of assets (liabilities) presented in the balance sheets (7,255,540) (7,805,057)
Repurchase agreements, gross amounts not offset with financial assets (liabilities) in the balance sheets, financial instruments 7,255,540 7,805,057
Repurchase agreements, gross amounts not offset with financial assets (liabilities) in the balance sheets, cash collateral (received) pledged 0 0
Repurchase agreements, gross amounts not offset with financial assets (liabilities) in the balance sheets, net amount 0 0
Offsetting Securities Sold under Agreements to Repurchase [Abstract]    
Derivative liabilities, gross amounts of recognized assets (liabilities) (52,719) (259,053)
Derivative liabilities, gross amounts offset in the balance sheets 48,465 234,156
Derivative liabilities, net amounts of assets (liabilities) presented in the balance sheets (4,254) (24,897)
Derivative liabilities, gross amounts not offset with financial assets (liabilities) in the balance sheets, financial instruments 4,254 10,114
Derivative liabilities, gross amounts not offset with financial assets (liabilities) in the balance sheets, cash collateral (received) pledged 0 0
Derivative liabilities, gross amounts not offset with financial assets (liabilities) in the balance sheets, net amount 0 (14,783)
Offsetting Derivative Liability, Securities Sold under Agreements to Repurchase, Securities Loaned [Abstract]    
Total liabilities, gross amounts of recognized assets (liabilities) (7,308,259) (8,064,110)
Total liabilities, gross amounts offset in the balance sheets 48,465 234,156
Total liabilities, net amounts of assets (liabilities) presented in the balance sheets (7,259,794) (7,829,954)
Total liabilities, gross amounts not offset with financial assets (liabilities) in the balance sheets, financial instruments 7,259,794 7,815,171
Total liabilities, gross amounts not offset with financial assets (liabilities) in the balance sheets, cash collateral (received) pledged 0 0
Total liabilities, gross amounts not offset with financial assets (liabilities) in the balance sheets, net amount $ 0 $ (14,783)