v3.26.1
Other Comprehensive Income - Schedule of Accumulated Other Comprehensive (Loss) Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance $ 4,285,980 $ 3,582,934 $ 4,340,553 $ 3,611,967
Other comprehensive income before reclassifications     (30,879) 13,131
Less: Amounts reclassified from accumulated other comprehensive loss     (445) (271,671)
Net current-period other comprehensive income (loss) (9,949) 24,252 (30,434) 284,802
Ending balance 4,283,214 3,683,891 4,283,214 3,683,891
Total        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance (247,848) (323,779) (227,363) (584,329)
Net current-period other comprehensive income (loss) (9,949) 24,252 (30,434) 284,802
Ending balance (257,797) (299,527) (257,797) (299,527)
Unrealized Gains and (Losses) on Available for Sale Securities        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance     (259,361) (583,875)
Other comprehensive income before reclassifications (8,596) 39,821 (26,466) 8,812
Less: Amounts reclassified from accumulated other comprehensive loss 0 19,936 0 (262,391)
Net current-period other comprehensive income (loss) (8,596) 19,885 (26,466) 271,203
Ending balance (285,827) (312,672) (285,827) (312,672)
Unrealized Gains and (Losses) on Cash Flow Hedges        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance     (2,990) (26,470)
Other comprehensive income before reclassifications (1,371) (312) (4,413) 4,319
Less: Amounts reclassified from accumulated other comprehensive loss (1,602) (5,770) (3,612) (11,506)
Net current-period other comprehensive income (loss) 231 5,458 (801) 15,825
Ending balance (3,791) (10,645) (3,791) (10,645)
Defined Benefit Pension Plans        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance     34,988 26,016
Other comprehensive income before reclassifications     0 0
Less: Amounts reclassified from accumulated other comprehensive loss     3,167 2,226
Net current-period other comprehensive income (loss) (1,584) (1,091) (3,167) (2,226)
Ending balance $ 31,821 $ 23,790 $ 31,821 $ 23,790