| Comprehensive income |
The following tables present a reconciliation of the changes in the components of other comprehensive income (loss) for the periods indicated, including the amount of income tax (expense) benefit allocated to each component of other comprehensive income (loss): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended
September 30, 2024 | | Nine Months Ended
September 30, 2024 | | Pre-Tax
Amount | | Tax (Expense)
Benefit | | After Tax
Amount | | Pre-Tax
Amount | | Tax (Expense)
Benefit | | After Tax
Amount | | | (Dollars in thousands) | | Change in fair value of securities available for sale | $ | 36,678 | | | $ | (8,392) | | | $ | 28,286 | | | $ | 38,084 | | | $ | (9,414) | | | $ | 28,670 | | | Less: net security losses reclassified into other noninterest expense | — | | | — | | | — | | | — | | | — | | | — | | | Net change in fair value of securities available for sale | 36,678 | | | (8,392) | | | 28,286 | | | 38,084 | | | (9,414) | | | 28,670 | | | | | | | | | | | | | | | Change in fair value of cash flow hedges | 7,144 | | | (1,953) | | | 5,191 | | | (3,402) | | | 930 | | | (2,472) | | | Less: net cash flow hedge losses reclassified into interest income or interest expense | (4,902) | | | 1,340 | | | (3,562) | | | (15,788) | | | 4,316 | | | (11,472) | | | | | | | | | | | | | | | Net change in fair value of cash flow hedges | 12,046 | | | (3,293) | | | 8,753 | | | 12,386 | | | (3,386) | | | 9,000 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Amortization of net actuarial gains | (24) | | | 6 | | | (18) | | | (74) | | | 20 | | | (54) | | | Amortization of net prior service costs | 4 | | | (2) | | | 2 | | | 13 | | | (4) | | | 9 | | | | | | | | | | | | | | | Net change in other comprehensive income for defined benefit postretirement plans (1) | (20) | | | 4 | | | (16) | | | (61) | | | 16 | | | (45) | | | Total other comprehensive income (loss) | $ | 48,704 | | | $ | (11,681) | | | $ | 37,023 | | | $ | 50,409 | | | $ | (12,784) | | | $ | 37,625 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended
September 30, 2023 | | Nine Months Ended
September 30, 2023 | | | Pre-Tax
Amount | | Tax (Expense)
Benefit | | After Tax
Amount | | Pre-Tax
Amount | | Tax (Expense)
Benefit | | After Tax
Amount | | | (Dollars in thousands) | | Change in fair value of securities available for sale | $ | (10,378) | | | $ | 2,457 | | | $ | (7,921) | | | $ | (3,186) | | | $ | 882 | | | $ | (2,304) | | | Less: net security losses reclassified into other noninterest expense | — | | | — | | | — | | | — | | | — | | | — | | | Net change in fair value of securities available for sale | (10,378) | | | 2,457 | | | (7,921) | | | (3,186) | | | 882 | | | (2,304) | | | | | | | | | | | | | | | Change in fair value of cash flow hedges | (7,266) | | | 2,043 | | | (5,223) | | | (13,966) | | | 3,927 | | | (10,039) | | | Less: net cash flow hedge losses reclassified into interest income or interest expense | (7,547) | | | 2,122 | | | (5,425) | | | (20,806) | | | 5,850 | | | (14,956) | | | | | | | | | | | | | | | Net change in fair value of cash flow hedges | 281 | | | (79) | | | 202 | | | 6,840 | | | (1,923) | | | 4,917 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Amortization of net actuarial gains | (137) | | | 38 | | | (99) | | | (411) | | | 115 | | | (296) | | | Amortization of net prior service costs | 10 | | | (3) | | | 7 | | | 29 | | | (8) | | | 21 | | | | | | | | | | | | | | | Net change in other comprehensive income for defined benefit postretirement plans (1) | (127) | | | 35 | | | (92) | | | (382) | | | 107 | | | (275) | | | Total other comprehensive (loss) income | $ | (10,224) | | | $ | 2,413 | | | $ | (7,811) | | | $ | 3,272 | | | $ | (934) | | | $ | 2,338 | |
(1)The amortization of prior service costs is included in the computation of net periodic pension cost as disclosed in Note 12 - Employee Benefit Plans within the Notes to the Consolidated Financial Statements included in Item 8 of the Company’s 2023 Form 10-K.
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| Company's accumulated other comprehensive loss, net of tax |
Information on the Company’s accumulated other comprehensive income (loss), net of tax, is comprised of the following components as of the dates indicated: | | | | | | | | | | | | | | | | | | | | | | | | | | | Unrealized Gain (Loss)
on Securities | | Unrealized Gain (Loss) on Cash Flow Hedge | | | | Defined Benefit Postretirement Plans | | Accumulated Other Comprehensive Income (Loss) | | (Dollars in thousands) | | 2024 | | Beginning balance: January 1, 2024 | $ | (96,231) | | | $ | (20,575) | | | | | $ | 1,979 | | | $ | (114,827) | | | Net change in other comprehensive income (loss) | 28,670 | | | 9,000 | | | | | (45) | | | 37,625 | | | Ending balance: September 30, 2024 | $ | (67,561) | | | $ | (11,575) | | | | | $ | 1,934 | | | $ | (77,202) | | | | 2023 | | Beginning balance: January 1, 2023 | $ | (128,657) | | | $ | (36,630) | | | | | $ | 2,203 | | | $ | (163,084) | | | | | | | | | | | | | | | | | | | | | | | Net change in other comprehensive (loss) income | (2,304) | | | 4,917 | | | | | (275) | | | 2,338 | | | Ending balance: September 30, 2023 | $ | (130,961) | | | $ | (31,713) | | | | | $ | 1,928 | | | $ | (160,746) | |
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