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Change in Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2020
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 investment securities and equity 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, 2017$(7,842)$1,223 $865 $(2,398)$— $(8,152)
Other comprehensive (loss) income before reclassifications(6,695)6 22 (56)— (6,723)
Less: Amounts reclassified from accumulated other comprehensive (loss) income(16)(450)(53)— — (519)
Net current-period other comprehensive loss(6,711)(444)(31)(56)— (7,242)
Balance, December 31, 2018$(14,553)$779 $834 $(2,454)$— $(15,394)
Other comprehensive income (loss) before reclassifications41,733 (2)(4,045)1,877 — 39,563 
Less: Amounts reclassified from accumulated other comprehensive income (loss)(253)(309)(106)— — (668)
Net current-period other comprehensive income (loss)41,480 (311)(4,151)1,877 — 38,895 
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 income (loss)(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)$56,007 
(1) Cash flow hedges were terminated as of April 1, 2020.
Components of other comprehensive income that impact the Consolidated Statements of Income are presented in the table below.
 Twelve Months Ended December 31,
Affected line item in
Consolidated Statements of
Income
(Dollars in thousands)202020192018 
Securities available-for-sale:
Realized gains on securities transactions$(9,076)$(333)$(21)Securities gains, net
Income taxes2,178 80 5 Income tax provision
Net of tax$(6,898)$(253)$(16)
Net unrealized holding gains on securities transferred between available-for-sale and held-to-maturity:
Amortization of net unrealized gains to income during the period$(251)$(407)$(586)
Interest and dividends on
investment securities
Income taxes59 98 136 Income tax provision
Net of tax$(192)$(309)$(450)
Amortization of defined benefit pension plan-related items:
Prior service (credits) costs (1)
$(266)$(76)$2 
Actuarial gains(47)(63)(45)
Total before tax$(313)$(139)$(43)
Salaries, benefits and
 other compensation
Income taxes75 33 (10)Income tax provision
Net of tax$(238)$(106)$(53)
Defined benefit pension plan settlement:
Realized losses on plan settlement$279 $— $— Other operating expense
Income taxes(67)— — Income tax provision
Net of tax$212 $— $— 
Net unrealized gains on terminated cash flow hedges:
Amortization of net unrealized gains to income during the period$(444)$— $— Interest and fees on loans and leases
Income taxes107 — — Income tax provision
Net of tax$(337)$— $— 
Total reclassifications$(7,453)$(668)$(519)
(1) Prior service costs balance for the year ended December 31, 2018 includes a tax true-up adjustment of $0.1 million from March 31, 2018. Note that the tax true-up was made to the deferred tax asset with an offset to AOCI and does not affect the actual net periodic benefit costs of the pension plan.