| Summary of activity in accumulated other comprehensive income (loss) |
| | | | | | | | | | | | | | | | (in thousands) | Investment Securities | Cash Flow Hedge Derivatives | Defined Benefit Pension and Postretirement Obligations | Accumulated Other Comprehensive (Loss) Income | Balance June 30, 2026 | $ | (54,836) | | $ | (6,659) | | $ | (18,098) | | $ | (79,593) | | | Other comprehensive loss before reclassifications | (199,386) | | — | | — | | (199,386) | | | | | | | | Amounts reclassified from accumulated other comprehensive (loss) income: | | | | | | | | | | Amortization of net unrealized losses on AFS securities transferred to HTM securities | 1,912 | | — | | — | | 1,912 | | | Other assets / accrued expenses and other liabilities | — | | (15,247) | | — | | (15,247) | | | Interest income | — | | (436) | | — | | (436) | | | Personnel expense | — | | — | | (63) | | (63) | | | | | | | | Income tax benefit (expense) | 49,254 | | (3,773) | | 16 | | 45,497 | | | Net other comprehensive loss during period | (148,220) | | (19,456) | | (47) | | (167,723) | | | Balance September 30, 2026 | $ | (203,056) | | $ | (26,115) | | $ | (18,145) | | $ | (247,316) | | | | | | | | Balance June 30, 2025 | $ | (6,109) | | $ | 12,487 | | $ | (20,674) | | $ | (14,297) | | | Other comprehensive loss before reclassifications | (5,178) | | — | | — | | (5,178) | | | | | | | | Amounts reclassified from accumulated other comprehensive income (loss): | | | | | | | | | | Amortization of net unrealized losses on AFS securities transferred to HTM securities | 1,992 | | — | | — | | 1,992 | | | Other assets / accrued expenses and other liabilities | — | | (825) | | — | | (825) | | | Interest income | — | | 1,440 | | — | | 1,440 | | | Personnel expense | — | | — | | (63) | | (63) | | | Other expense | — | | — | | (4) | | (4) | | | Income tax benefit | 795 | | 148 | | 17 | | 960 | | | Net other comprehensive (loss) income during period | (2,392) | | 763 | | (51) | | (1,680) | | | Balance September 30, 2025 | $ | (8,501) | | $ | 13,249 | | $ | (20,725) | | $ | (15,977) | |
|
The following table summarizes the components of accumulated other comprehensive income (loss) at September 30, 2026 and 2025, including changes during the preceding nine and three month periods as well as any reclassifications out of accumulated other comprehensive income (loss): | | | | | | | | | | | | | | | | (in thousands) | Investment Securities | Cash Flow Hedge Derivatives | Defined Benefit Pension and Postretirement Obligations | Accumulated Other Comprehensive Income (Loss) | Balance December 31, 2025 | $ | (2,456) | | $ | 12,894 | | $ | (18,003) | | $ | (7,566) | | | Other comprehensive loss before reclassifications | (272,763) | | — | | — | | (272,763) | | | | | | | | Amounts reclassified from accumulated other comprehensive (loss) income: | | | | | | | | | | Amortization of net unrealized losses on AFS securities transferred to HTM securities | 5,503 | | — | | — | | 5,503 | | | Other assets / accrued expenses and other liabilities | — | | (29,665) | | — | | (29,665) | | | Interest expense | — | | (1,779) | | — | | (1,779) | | | Personnel expense | — | | — | | (189) | | (189) | | | | | | | | Income tax benefit (expense) | 66,660 | | (7,565) | | 47 | | 59,143 | | | Net other comprehensive loss during period | (200,600) | | (39,009) | | (142) | | (239,750) | | | Balance September 30, 2026 | $ | (203,056) | | $ | (26,115) | | $ | (18,145) | | $ | (247,316) | | | | | | | Balance December 31, 2024 | $ | (48,993) | | $ | (1,268) | | $ | (24,154) | | $ | (74,416) | | | Other comprehensive income before reclassifications | 47,970 | | — | | 4,770 | | 52,741 | | | | | | | | Amounts reclassified from accumulated other comprehensive income (loss): | | | | | | | | | | Amortization of net unrealized losses on AFS securities transferred to HTM securities | 5,978 | | — | | — | | 5,978 | | | Other assets / accrued expenses and other liabilities | — | | 7,707 | | — | | 7,707 | | | Interest income | — | | 3,995 | | — | | 3,995 | | | Personnel expense | — | | — | | (189) | | (189) | | | Other expense | — | | — | | (12) | | (12) | | | Income tax (expense) benefit | (13,456) | | 2,816 | | (1,140) | | (11,780) | | | Net other comprehensive income during period | 40,492 | | 14,518 | | 3,429 | | 58,439 | | | Balance September 30, 2025 | $ | (8,501) | | $ | 13,249 | | $ | (20,725) | | $ | (15,977) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|