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OTHER COMPREHENSIVE INCOME (LOSS) (accumulated other comprehensive loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accumulated other comprehensive loss [Line Items] |  |  |
Balance, beginning of year | $ (37,264) | $ (31,492) | $ (41,433)
Other comprehensive income (loss) before reclassifications | 6,851 | (11,107) | 8,587
Amounts reclassified from accumulated other comprehensive loss | 385 | 5,335 | 1,354
Other comprehensive income (loss) | 7,236 | (5,772) | 9,941
Accumulated other comprehensive loss | (30,028) | (37,264) | (31,492)
Balance, end of year | (30,028) | (37,264) | (31,492)
Postretirement benefit plans [Member] |  |  |
Accumulated other comprehensive loss [Line Items] |  |  |
Balance, beginning of year | (26,872) | (15,431) | (21,956)
Other comprehensive income (loss) before reclassifications | 6,263 | (11,235) | 6,194
Amounts reclassified from accumulated other comprehensive loss | 785 | (206) | 331
Other comprehensive income (loss) | 7,048 | (11,441) | 6,525
Accumulated other comprehensive loss | (19,824) | (26,872) | (15,431)
Balance, end of year | (19,824) | (26,872) | (15,431)
Net unrealized loss on debt securities [Member] |  |  |
Accumulated other comprehensive loss [Line Items] |  |  |
Balance, beginning of year | (909) | (344) | (90)
Other comprehensive income (loss) before reclassifications | (183) | (571) | (254)
Amounts reclassified from accumulated other comprehensive loss | 1,092 | 6 | 0
Other comprehensive income (loss) | 909 | (565) | (254)
Accumulated other comprehensive loss | 0 | (909) | (344)
Balance, end of year | 0 | (909) | (344)
Net unrealized loss on cash flow hedges [Member] |  |  |
Accumulated other comprehensive loss [Line Items] |  |  |
Balance, beginning of year | 2,593 | (2,261) | (5,351)
Other comprehensive income (loss) before reclassifications | (524) | 4,869 | 2,067
Amounts reclassified from accumulated other comprehensive loss | (2,355) | (15) | 1,023
Other comprehensive income (loss) | (2,879) | 4,854 | 3,090
Accumulated other comprehensive loss | (286) | 2,593 | (2,261)
Balance, end of year | (286) | 2,593 | (2,261)
Foreign currency translation adjustment [Member] |  |  |
Accumulated other comprehensive loss [Line Items] |  |  |
Balance, beginning of year | (12,076) | (13,456) | (14,036)
Other comprehensive income (loss) before reclassifications | 1,295 | (4,170) | 580
Amounts reclassified from accumulated other comprehensive loss | 863 | 5,550 | 0
Other comprehensive income (loss) | 2,158 | 1,380 | 580
Accumulated other comprehensive loss | (9,918) | (12,076) | (13,456)
Balance, end of year | $ (9,918) | $ (12,076) | $ (13,456)

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