v3.25.1
Other comprehensive income (loss) - Change in accumulated other comprehensive income (loss) by component (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Foreign Currency Translation      
Beginning Balance $ (71,365) $ (64,528)  
Other comprehensive loss (6,646) (4,020)  
Net change (6,646) (4,020)  
Ending Balance (78,011) (68,548)  
Adjustment of pension and postretirement benefit plans      
Beginning Balance (94,692) (117,894)  
Other comprehensive income before reclassifications 0 0  
Amounts reclassified from accumulated other comprehensive loss for amortization of net losses 1,421 2,262  
Net change 1,421 2,262  
Ending Balance (93,271) (115,632)  
Unrealized net holding losses on debt securities      
Beginning Balance (1,495,183) (1,713,109)  
Other comprehensive income (loss) before reclassifications 140,229 (71,104)  
Amounts reclassified from accumulated other comprehensive (loss) income for amortization of net unrealized losses of debt securities transferred from available-for-sale to held-to-maturity 36,249 35,207  
Net change 176,478 (35,897)  
Ending Balance (1,318,705) 1,749,006  
Total $ (1,489,987) $ (1,933,186) $ (1,661,240)