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Accumulated Other Comprehensive Income (Loss)
9 Months Ended
Sep. 30, 2025
Equity [Abstract]  
Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss)
For the three and nine months ended September 30, 2025 and 2024, the Company’s accumulated OCI (loss) includes the following three components: (i) unrealized holding gains (losses) on investment securities available-for-sale; (ii) change in the fair value of cash flow hedges; and (iii) adjustment of accumulated obligation for postretirement benefits.
 
Changes in accumulated OCI (loss) by component, net of tax, were as follows for the periods indicated:
 Three Months Ended September 30, 2025
 
Investment
Securities
 Available-for-Sale
Net Change in Fair Value of Cash Flow HedgesPostretirement
Benefits
Accumulated Other
Comprehensive
Income (Loss)
 (In Thousands)
Balance at June 30, 2025$(39,654)$(436)$712 $(39,378)
Other comprehensive income (loss)10,173 (89)— 10,084 
Reclassification adjustment for (income) expense recognized in earnings— 389 — 389 
Balance at September 30, 2025$(29,481)$(136)$712 $(28,905)
 Three Months Ended September 30, 2024
 
Investment
Securities
 Available-for-Sale
Net Change in Fair Value of Cash Flow HedgesPostretirement
Benefits
Accumulated Other
Comprehensive
Income (Loss)
 (In Thousands)
Balance at June 30, 2024$(59,733)$(3,289)$1,329 $(61,693)
Other comprehensive income (loss)20,429 2,372 — 22,801 
Reclassification adjustment for (income) expense recognized in earnings— 811 — 811 
Balance at September 30, 2024$(39,304)$(106)$1,329 $(38,081)
 Nine Months Ended September 30, 2025
 
Investment
Securities
 Available-for-Sale
Net Change in Fair Value of Cash Flow HedgesPostretirement
Benefits
Accumulated Other
Comprehensive
Income (Loss)
 (In Thousands)
Balance at December 31, 2024$(53,718)$(1,323)$2,159 $(52,882)
Other comprehensive income (loss)24,237 (1,955)22,288 
Reclassification adjustment for (income) expense recognized in earnings— 1,181 508 1,689 
Balance at September 30, 2025$(29,481)$(136)$712 $(28,905)
 Nine Months Ended September 30, 2024
 
Investment
Securities
 Available-for-Sale
Net Change in Fair Value of Cash Flow HedgesPostretirement
Benefits
Accumulated Other
Comprehensive
Income (Loss)
 (In Thousands)
Balance at December 31, 2023$(52,546)$(1,581)$1,329 $(52,798)
Other comprehensive income (loss)13,242 (977)— 12,265 
Reclassification adjustment for (income) expense recognized in earnings— 2,452 — 2,452 
Balance at September 30, 2024$(39,304)$(106)$1,329 $(38,081)