v3.26.3
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Other Comprehensive Income (Loss), before Reclassification Adjustments and Tax [Abstract]                
Unrealized gain (loss) on investment securities $ (209,618) $ 30,469 $ (254,232) $ 71,577        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (624) (990) (1,536) 1,207        
Retirement obligation 0 0 0 0        
Foreign currency translation 15 (268) (407) 412        
Total (210,227) 29,211 (256,175) 73,196        
Other Comprehensive Income (Loss) Reclassifications before Tax [Abstract]                
Realized gain (loss) on securities available-for-sale 13 3 (1,292) (9,908)        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax (143) (199) (541) (596)        
Retirement obligation (568) (656) (1,618) (1,906)        
Foreign currency translation 0 0 0 0        
Total (698) (852) (3,451) (12,410)        
Transactions Pre-tax                
Unrealized gain (loss) on investment securities (209,631) 30,466 (252,940) 81,485        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax (481) (791) (995) 1,803        
Unfunded pension obligation 568 656 1,618 1,906        
Foreign currency translation 15 (268) (407) 412        
Total (209,529) 30,063 (252,724) 85,606        
Transactions Tax-effect                
Unrealized gain (loss) on investment securities 46,175 (6,711) 55,715 (17,949)        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax (111) (183) (230) 417        
Retirement obligation (132) (151) (374) (441)        
Foreign currency translation 0 0 0 0        
Total 46,154 (6,679) 55,571 (18,807)        
Transactions Net of tax                
Unrealized gain (loss) on investment securities (163,456) 23,755 (197,225) 63,536        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax (370) (608) (765) 1,386        
Retirement obligation 436 505 1,244 1,465        
Foreign currency translation 15 (268) (407) 412        
Total (163,375) 23,384 (197,153) 66,799        
Balances Net of tax                
Unrealized gain (loss) on investment securities (361,148) (192,978) (361,148) (192,978) $ (197,692) $ (163,923) $ (216,733) $ (256,514)
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax (671) 210 (671) 210 (301) 94 818 (1,176)
Retirement obligation (23,825) (29,015) (23,825) (29,015) (24,261) (25,069) (29,520) (30,480)
Foreign currency translation (1,451) (1,217) (1,451) (1,217) (1,466) (1,044) (949) (1,629)
Accumulated other comprehensive loss (387,095) (223,000) (387,095) (223,000) $ (223,720) $ (189,942) $ (246,384) $ (289,799)
Accumulated other comprehensive income (loss)                
Transactions Net of tax                
Total $ (163,375) $ 23,384 $ (197,153) $ 66,799