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Shareholders' Equity (Tables)
12 Months Ended
Dec. 31, 2024
Accumulated Other Comprehensive Income [Abstract]  
Schedule of Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)

The following table presents the components of OCI for the years ended December 31: 
Before-Tax AmountTax EffectNet of Tax Amount
(dollars in thousands)
2024
Net unrealized gains (losses) on securities$(28,993)$6,568 $(22,425)
Reclassification adjustment for securities gains (losses) included in net income(1)
20,283 (4,594)15,689 
Amortization of net unrealized gains (losses) on AFS transferred to HTM(2)
7,251 (1,642)5,609 
Net unrealized holding gains (losses) arising during the period on interest rate derivatives used in cash flow hedges764 (174)590 
Reclassification adjustment for net gains (losses) realized in net income on interest rate derivatives used in cash flow hedges23,453 (5,312)18,141 
Unrecognized pension and postretirement income9,411 (2,132)7,279 
Amortization of net unrecognized pension and postretirement items(3)
(541)119 (422)
Total Other Comprehensive Income (Loss)$31,628 $(7,167)$24,461 
2023
Net unrealized gains (losses) on securities$46,572 $(10,549)$36,023 
Reclassification adjustment for securities gains (losses) included in net income(1)
(733)166 (567)
Amortization of net unrealized gains (losses) on AFS transferred to HTM(2)
7,644 (1,731)5,913 
Net unrealized holding gains (losses) arising during the period on interest rate derivatives used in cash flow hedges9,048 (2,050)6,998 
Reclassification adjustment for net gains (losses) realized in net income on interest rate derivatives used in cash flow hedges25,850 (5,855)19,995 
Unrecognized pension and postretirement income 6,162 (1,385)4,777 
Amortization of net unrecognized pension and postretirement items(3)
73 (16)57 
Total Other Comprehensive Income (Loss)$94,616 $(21,420)$73,196 
2022
Net unrealized gains (losses) on securities$(403,606)$91,437 $(312,169)
Reclassification adjustment for securities gains (losses) included in net income(1)
(27)(20)
Amortization of net unrealized gains (losses) on AFS transferred to HTM(2)
(57,509)13,026 (44,483)
Net unrealized holding gains (losses) arising during the period on interest rate derivatives used in cash flow hedges(81,400)18,437 (62,963)
Reclassification adjustment for net gains (losses) loss realized in net income on interest rate swaps used in cash flow hedges7,761 (1,757)6,004 
Unrecognized pension and postretirement income 825 (181)644 
Amortization of net unrecognized pension and postretirement items(3)
128 (28)100 
Total Other Comprehensive Income (Loss)$(533,828)$120,941 $(412,887)
(1) Amounts reclassified out of AOCI. Before-tax amounts included in "Investment securities gains, net" on the Consolidated Statements of Income. See "Note 4
- Investment Securities," for additional details.
(2) Amounts reclassified out of AOCI. Before-tax amounts included as a reduction to "Interest Income" on the Consolidated Statements of Income.
(3) Amounts reclassified out of AOCI. Before-tax amounts included in "Salaries and employee benefits" on the Consolidated Statements of Income. See "Note
17 - Employee Benefit Plans," for additional details.
Schedule of Accumulated Other Comprehensive Income (Loss)
The following table presents changes in each component of AOCI, net of tax, for the years ended December 31: 
Unrealized Gains (Losses) on Investment SecuritiesNet Unrealized Gain (Loss) on Interest Rate Derivatives used in Cash Flow HedgesUnrecognized Pension and Postretirement Plan Income (Costs)Total
(dollars in thousands)
Balance at December 31, 2021$40,441 $(4,817)$(8,213)$27,411 
OCI before reclassifications(312,169)(62,963)644 (374,488)
Amounts reclassified from AOCI (20)6,004 100 6,084 
Amortization of net unrealized gains (losses) on AFS securities transferred to HTM(44,483)— — (44,483)
Balance at December 31, 2022(316,231)(61,776)(7,469)(385,476)
OCI before reclassifications36,023 6,998 4,777 47,798 
Amounts reclassified from AOCI(567)19,995 57 19,485 
Amortization of net unrealized gains (losses) on AFS securities transferred to HTM5,913 — — 5,913 
Balance at December 31, 2023(274,862)(34,783)(2,635)(312,280)
OCI before reclassifications(22,425)590 7,279 (14,556)
Amounts reclassified from AOCI15,689 18,141 (422)33,408 
Amortization of net unrealized gains (losses) on AFS securities transferred to HTM5,609   5,609 
Balance at December 31, 2024$(275,989)$(16,052)$4,222 $(287,819)