v3.26.1
ACCUMULATED OTHER COMPREHENSIVE LOSS (Changes in Components of AOCI, Net of Related Taxes) (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) [Line Items]        
Balance, beginning $ 2,194,275 $ 1,868,849 $ 2,020,277 $ 1,856,048
Balance, ending 2,265,335 1,899,779 2,265,335 1,899,779
Accumulated Other Comprehensive Loss        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance, beginning (11,215) (8,814) (10,840) (7,861)
Current period change, excluding amounts reclassified from accumulated other comprehensive income/(loss) 24 (593) (140) (1,197)
Amounts reclassified from accumulated other comprehensive income/(loss) (136) (739) (347) (1,088)
Balance, ending (11,327) (10,146) (11,327) (10,146)
Unrealized gains on cash flow hedges        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance, beginning 1,750 4,399 2,093 5,176
Current period change, excluding amounts reclassified from accumulated other comprehensive income/(loss) 27 170 160 (10)
Amounts reclassified from accumulated other comprehensive income/(loss) (400) (1,003) (876) (1,600)
Balance, ending 1,377 3,566 1,377 3,566
Items not yet recognized as a component of net periodic benefit cost        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance, beginning (12,713) (13,213) (12,933) (13,037)
Current period change, excluding amounts reclassified from accumulated other comprehensive income/(loss)   (763) (45) (1,187)
Amounts reclassified from accumulated other comprehensive income/(loss) 264 264 529 512
Balance, ending (12,449) $ (13,712) (12,449) $ (13,712)
Foreign currency translation adjustment        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance, beginning (252)      
Current period change, excluding amounts reclassified from accumulated other comprehensive income/(loss) (3)   (255)  
Balance, ending $ (255)   $ (255)