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CHANGE IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
 12 Months Ended
Dec. 31, 2022
Equity [Abstract]  
CHANGE IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
24. CHANGE IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
Accumulated other comprehensive income (loss) includes unrealized gains and losses on available-for-sale investments, unrealized gains and losses on cash flow hedges, as well as unrecognized prior service costs, transition costs, and actuarial gains and losses on defined benefit pension plans. Changes to accumulated other comprehensive income (loss) are presented net of tax as a component of stockholders' equity. Amounts that are reclassified out of accumulated other comprehensive income (loss) are recorded on the Consolidated Statement of Income either as a gain or loss.
Changes to accumulated other comprehensive income (loss) by component are shown net of taxes in the following tables for the period indicated:
(Dollars in thousands)
Net change in
investment
securities
available for sale
Net change in
investment securities held
to maturity
Net change in
defined benefit
plan
Net change in fair value of derivatives used for cash flow hedges (1)
Net change in
equity method
investments		Total
Balance, December 31, 2019$26,927 $468 $(3,317)$(577)$— $23,501 
Other comprehensive income (loss) before reclassifications39,853 — (1,445)1,560 (9)39,959 
Less: Amounts reclassified from accumulated other comprehensive (loss) income(6,898)(192)(26)(337)— (7,453)
Net current-period other comprehensive income (loss)32,955 (192)(1,471)1,223 (9)32,506 
Balance, December 31, 2020$59,882 $276 $(4,788)$646 (9)$56,007 
Other comprehensive (loss) income before reclassifications(93,503)— 162 — 362 (92,979)
Less: Amounts reclassified from accumulated other comprehensive (loss) income(252)(101)(65)(378)— (796)
Net current-period other comprehensive (loss) income(93,755)(101)97 (378)362 (93,775)
Balance, December 31, 2021$(33,873)$175 $(4,691)$268 $353 $(37,768)
Other comprehensive (loss) income before reclassifications(2)
(529,660)(119,769)318 — 213 (648,898)
Less: Amounts reclassified from accumulated other comprehensive income (loss)— 11,091 (109)(160)— 10,822 
Net current-period other comprehensive (loss) income(529,660)(108,678)209 (160)213 (638,076)
Balance, December 31, 2022$(563,533)$(108,503)$(4,482)$108 $566 $(675,844)
(1)Cash flow hedges were terminated as of April 1, 2020.
(2)Includes $119.8 million, net of tax, of unrealized losses on transferred investment securities from available-for-sale to held-to-maturity.
Components of other comprehensive income (loss) that impact the Consolidated Statements of Income are presented in the table below.
 Twelve Months Ended December 31,
Affected line item in
Consolidated Statements of
Income
(Dollars in thousands)202220212020 
Securities available-for-sale:
Realized gains on securities transactions$— $(331)$(9,076)Securities gains, net
Income taxes— 79 2,178 Income tax provision
Net of tax$— $(252)$(6,898)
Net unrealized holding gains on securities transferred between available-for-sale and held-to-maturity:
Amortization of net unrealized gains to income during the period$14,593 $(133)$(251)
Interest and dividends on
investment securities
Income taxes(3,502)32 59 Income tax provision
Net of tax$11,091 $(101)$(192)
Amortization of defined benefit pension plan-related items:
Prior service (credits) costs$(76)$(85)$(266)
Actuarial gains(68)— (47)
Total before tax$(144)$(85)$(313)
Salaries, benefits and
 other compensation
Income taxes35 20 75 Income tax provision
Net of tax$(109)$(65)$(238)
Defined benefit pension plan settlement:
Realized losses on plan settlement$— $— $279 Other operating expense
Income taxes— — (67)Income tax provision
Net of tax$— $— $212 
Net unrealized gains on terminated cash flow hedges:
Amortization of net unrealized gains to income during the period$(211)$(497)$(444)Interest and fees on loans and leases
Income taxes51 119 107 Income tax provision
Net of tax$(160)$(378)$(337)
Total reclassifications$10,822 $(796)$(7,453)