| Resale and Repurchase Agreements [Table Text Block] |
The following table shows the extent to which resale agreement assets and repurchase agreement liabilities with the same counterparty have been offset on the consolidated balance sheets, in addition to the extent to which they could potentially be offset. Also shown is collateral received or pledged, which consists of marketable securities. The collateral amounts in the table are limited to the outstanding balances of the related asset or liability (after offsetting is applied); thus amounts of excess collateral are not shown.
| | | | | | | | | | | | | | | | | | | | | | | | | Gross Amounts Not Offset in the Balance Sheet | | | (In thousands) | Gross Amount Recognized | Gross Amounts Offset in the Balance Sheet | Net Amounts Presented in the Balance Sheet | Financial Instruments Available for Offset | Securities Collateral Received/Pledged | Unsecured Amount | | June 30, 2026 | | | | | | | Total resale agreements, subject to master netting arrangements | $ | 1,150,000 | | $ | — | | $ | 1,150,000 | | $ | — | | $ | (1,150,000) | | $ | — | | Total repurchase agreements, subject to master netting arrangements | 2,306,471 | | — | | 2,306,471 | | — | | (2,306,471) | | — | | | December 31, 2025 | | | | | | | Total resale agreements, subject to master netting arrangements | $ | 850,000 | | $ | — | | $ | 850,000 | | $ | — | | $ | (850,000) | | $ | — | | Total repurchase agreements, subject to master netting arrangements | 2,861,016 | | — | | 2,861,016 | | — | | (2,861,016) | | — | |
|
| Schedule of Underlying Assets of Repurchase Agreements [Table Text Block] |
The table below shows the remaining contractual maturities of repurchase agreements outstanding at June 30, 2026 and December 31, 2025, in addition to the various types of marketable securities that have been pledged by the Company as collateral for these borrowings.
| | | | | | | | | | | | | | | | Remaining Contractual Maturity of the Agreements | | | (In thousands) | Overnight and continuous | Up to 90 days | Greater than 90 days | Total | | June 30, 2026 | | | | | | Repurchase agreements, secured by: | | | | | | U.S. government and federal agency obligations | $ | 781,194 | | $ | — | | $ | — | | $ | 781,194 | | | Government-sponsored enterprise obligations | 10,443 | | — | | — | | 10,443 | | | | | | | | Agency mortgage-backed securities | 999,669 | | 3,900 | | 24,250 | | 1,027,819 | | | Non-agency mortgage-backed securities | 20,480 | | — | | — | | 20,480 | | | Asset-backed securities | 318,542 | | 19,993 | | 21,516 | | 360,051 | | | Other debt securities | 106,484 | | — | | — | | 106,484 | | | Total repurchase agreements, gross amount recognized | $ | 2,236,812 | | $ | 23,893 | | $ | 45,766 | | $ | 2,306,471 | | | December 31, 2025 | | | | | | Repurchase agreements, secured by: | | | | | | U.S. government and federal agency obligations | $ | 503,061 | | $ | — | | $ | — | | $ | 503,061 | | | Government-sponsored enterprise obligations | 10,539 | | — | | — | | 10,539 | | | | | | | | Agency mortgage-backed securities | 1,647,928 | | 4,600 | | 26,750 | | 1,679,278 | | | Non-agency mortgage-backed securities | 21,970 | | — | | — | | 21,970 | | | Asset-backed securities | 453,827 | | 29,656 | | 21,226 | | 504,709 | | | Other debt securities | 141,459 | | — | | — | | 141,459 | | | Total repurchase agreements, gross amount recognized | $ | 2,778,784 | | $ | 34,256 | | $ | 47,976 | | $ | 2,861,016 | |
|