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CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
AOCI - Beginning Balance $ 3,330,954 $ 2,907,569  
Reclassifications 682 1,138 $ 586
AOCI - Ending Balance 3,571,874 3,330,954 2,907,569
Accumulated Defined Benefit Pension Items      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
AOCI - Beginning Balance (13,592) (17,184) (12,922)
Other comprehensive income before reclassifications (2,034) 2,454 (4,848)
Reclassifications 682 1,138 586
Other Comprehensive Income (Loss) (1,352) 3,592 (4,262)
AOCI - Ending Balance (14,944) (13,592) (17,184)
Other Comprehensive Income (Loss) before Reclassifications, Tax (374) 851 (1,680)
Reclassification from AOCI, Current Period, Tax $ (229) $ (394) $ (203)