v3.26.1
Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) before Tax [Roll Forward]        
Beginning Balance $ 4,681,315 $ 4,186,763 $ 4,553,860 $ 4,234,666
Reclassifications from OCI to net income:        
Total other comprehensive income 56,638 (38,674) 29,782 (38,045)
Ending Balance 4,701,832 4,315,059 4,701,832 4,315,059
Accumulated Other Comprehensive Income (Loss)        
Accumulated Other Comprehensive Income (Loss) before Tax [Roll Forward]        
Beginning Balance 33,005 (4,211) 59,861 (4,840)
OCI before reclassifications:        
Net change in fair value of AFS securities 56,545 (39,710) 29,783 (36,689)
Reclassifications from OCI to net income:        
Net realized (gains) from sales of AFS securities (435)   (557) (2,704)
Pension benefits, net 528 1,036 556 1,348
Total other comprehensive income 56,638 (38,674) 29,782 (38,045)
Ending Balance $ 89,643 $ (42,885) $ 89,643 $ (42,885)