v3.26.3
Other Comprehensive Income (Components of Accumulated Other Comprehensive Income) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Accumulated other comprehensive income (loss), beginning balance     $ (79,309)  
Net other comprehensive income (loss) $ (32,437) $ 11,121 (30,488) $ 34,343
Accumulated other comprehensive income (loss), ending balance (109,797)   (109,797)  
Net Unrealized Gains (Losses) on AFS Securities        
Accumulated other comprehensive income (loss), beginning balance (75,100) (87,677) (73,743) (102,439)
Other comprehensive income (loss) before reclassifications (33,171) 9,577 (34,528) 24,339
Amounts reclassed from accumulated other comprehensive income (loss) 0 0 0 0
Net other comprehensive income (loss) (33,171) 9,577 (34,528) 24,339
Accumulated other comprehensive income (loss), ending balance (108,271) (78,100) (108,271) (78,100)
Net Unrealized Losses on Cash Flow Hedges        
Accumulated other comprehensive income (loss), beginning balance 127 (6,269) (3,142) (7,938)
Other comprehensive income (loss) before reclassifications 747 42 1,847 (1,180)
Amounts reclassed from accumulated other comprehensive income (loss) (31) 1,480 2,138 4,371
Net other comprehensive income (loss) 716 1,522 3,985 3,191
Accumulated other comprehensive income (loss), ending balance 843 (4,747) 843 (4,747)
Net Unrealized Losses on Defined Benefit Plan Obligations        
Accumulated other comprehensive income (loss), beginning balance (2,387) (2,003) (2,424) (8,794)
Other comprehensive income (loss) before reclassifications 0 0 0 1,937
Amounts reclassed from accumulated other comprehensive income (loss) 18 22 55 4,876
Net other comprehensive income (loss) 18 22 55 6,813
Accumulated other comprehensive income (loss), ending balance (2,369) (1,981) (2,369) (1,981)
Accumulated Other Comprehensive Income (Loss)        
Accumulated other comprehensive income (loss), beginning balance (77,360) (95,949) (79,309) (119,171)
Other comprehensive income (loss) before reclassifications (32,424) 9,619 (32,681) 25,096
Amounts reclassed from accumulated other comprehensive income (loss) (13) 1,502 2,193 9,247
Net other comprehensive income (loss) (32,437) 11,121 (30,488) 34,343
Accumulated other comprehensive income (loss), ending balance $ (109,797) $ (84,828) $ (109,797) $ (84,828)