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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Statement of Comprehensive Income [Abstract]        
Net income $ 379,000 $ 173,000 $ 857,000 $ 473,000
Unamortized holding gains on securities transferred to held to maturity, net of tax        
Reclassification adjustment for accretion of unrealized holding gains on HTM securities, net of tax (1,000) (2,000) (4,000) (6,000)
Net change (1,000) (2,000) (4,000) (6,000)
Unrealized gains (losses) on securities available for sale, net of tax        
Change in net unrealized gains (losses) on AFS securities arising during the period, net of tax (511,000) 70,000 (634,000) 5,000
Reclassification adjustment for realized (gains) losses on sale of AFS securities included in net income, net of tax 1,000 0 21,000 9,000
Net change (510,000) 70,000 (613,000) 14,000
Unrealized gains (losses) on derivative instruments designated as cash flow hedges, net of tax        
Change in net unrealized gains (losses) on cash flow hedges arising during the period, net of tax (12,000) (10,000) (30,000) 0
Reclassification adjustment for realized (gains) losses on cash flow hedges included in net income, net of tax (1,000) 0 (1,000) 0
Net change (13,000) (10,000) (31,000) 0
Total other comprehensive income (loss) (524,000) 58,000 (648,000) 8,000
Comprehensive income (loss) $ (145,000) $ 231,000 $ 209,000 $ 481,000