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Accumulated Other Comprehensive Income (Loss) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Accumulated Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income (Loss) AOCI includes net income as well as unrealized gains and losses, net of tax, on AFS securities and derivative instruments, as well as changes in the funded status of our defined benefit pension plan. Unrealized gains and losses and changes in the funded status of the pension plan, net of tax, are excluded from net income, and are reflected as a direct charge or credit to shareholders’ equity. Comprehensive income (loss) and the related components are disclosed in the consolidated statements of comprehensive income. The following table provides a roll-forward of the changes in AOCI by component for the years ended December 31, 2018, 2019 and 2020 (net of tax):
| Unrealized Gains (Losses) on AFS Securities |  | Unrealized Gains (Losses) on Derivative Instruments |  | Change in Unrecognized Pension Cost on Defined Benefit Pension Plan |  | Total
Balance, January 1, 2018 | $ | 391 |  |  | $ | 230 |  |  | $ | (3,223) |  |  | $ | (2,602) |
OCI before reclassifications | (7,229) |  |  | 33 |  |  | 265 |  |  | (6,931) |
Amounts reclassified from AOCI | — |  |  | — |  |  | 345 |  |  | 345 |
Subtotal | (7,229) |  |  | 33 |  |  | 610 |  |  | (6,586) |
Tax effect | 1,415 |  |  | (7) |  |  | (128) |  |  | 1,280 |
OCI, net of tax | (5,814) |  |  | 26 |  |  | 482 |  |  | (5,306) |
Adoption of ASU 2016-01 | 223 |  |  | — |  |  | — |  |  | 223 |
Balance, December 31, 2018 | (5,200) |  |  | 256 |  |  | (2,741) |  |  | (7,685) |
OCI before reclassifications | 12,276 |  |  | (256) |  |  | (210) |  |  | 11,810 |
Amounts reclassified from AOCI | (6) |  |  | — |  |  | 268 |  |  | 262 |
Subtotal | 12,270 |  |  | (256) |  |  | 58 |  |  | 12,072 |
Tax effect | (2,458) |  |  | 54 |  |  | (12) |  |  | (2,416) |
OCI, net of tax | 9,812 |  |  | (202) |  |  | 46 |  |  | 9,656 |
Balance, December 31, 2019 | 4,612 |  |  | 54 |  |  | (2,695) |  |  | 1,971 |
OCI before reclassifications | 7,474 |  |  | (121) |  |  | (238) |  |  | 7,115 |
Amounts reclassified from AOCI | (71) |  |  | — |  |  | 176 |  |  | 105 |
Subtotal | 7,403 |  |  | (121) |  |  | (62) |  |  | 7,220 |
Tax effect | (1,530) |  |  | 25 |  |  | 12 |  |  | (1,493) |
OCI, net of tax | 5,873 |  |  | (96) |  |  | (50) |  |  | 5,727 |
Balance, December 31, 2020 | $ | 10,485 |  |  | $ | (42) |  |  | $ | (2,745) |  |  | $ | 7,698 |
Included in OCI are changes in unrealized gains and losses related to auction rate money market preferred stocks. Auction rate money market preferred stocks, for federal income tax purposes, have no deferred federal income taxes related to unrealized gains or losses given the nature of the investments. Changes in unrealized gains and losses related to investments in equity securities were not included in OCI after the adoption of ASU 2016-01, effective January 1, 2018. A summary of the components of unrealized gains on AFS securities included in OCI follows for the years ended December 31:
| 2020 |  | 2019 |  | 2018
| Auction Rate Money Market Preferred Stocks |  | All Other AFS Securities |  | Total |  | Auction Rate Money Market Preferred Stocks |  | All Other AFS Securities |  | Total |  | Auction Rate Money Market Preferred Stocks |  | All Other AFS Securities |  | Total
Unrealized gains (losses) arising during the period | $ | 118 |  |  | $ | 7,356 |  |  | $ | 7,474 |  |  | $ | 565 |  |  | $ | 11,711 |  |  | $ | 12,276 |  |  | $ | (495) |  |  | $ | (6,734) |  |  | $ | (7,229) |
Reclassification adjustment for net (gains) losses included in net income | — |  |  | (71) |  |  | (71) |  |  | — |  |  | (6) |  |  | (6) |  |  | — |  |  | — |  |  | — |
Net unrealized gains (losses) | 118 |  |  | 7,285 |  |  | 7,403 |  |  | 565 |  |  | 11,705 |  |  | 12,270 |  |  | (495) |  |  | (6,734) |  |  | (7,229) |
Tax effect | — |  |  | (1,530) |  |  | (1,530) |  |  | — |  |  | (2,458) |  |  | (2,458) |  |  | — |  |  | 1,415 |  |  | 1,415 |
Unrealized gains (losses), net of tax | $ | 118 |  |  | $ | 5,755 |  |  | $ | 5,873 |  |  | $ | 565 |  |  | $ | 9,247 |  |  | $ | 9,812 |  |  | $ | (495) |  |  | $ | (5,319) |  |  | $ | (5,814) |
The following table details reclassification adjustments and the related affected line items in our consolidated statements of income for the years ended December 31:
Details about AOCI components | Amount Reclassified from AOCI |  | Affected Line Item in the Consolidated Statements of Income
| 2020 |  | 2019 |  | 2018 |  |
Unrealized gains (losses) on AFS securities |  |  |  |  |  |  |
| $ | 71 |  |  | $ | 6 |  |  | $ | — |  |  | Net gains on sale of AFS securities
| 15 |  |  | 1 |  |  | — |  |  | Federal income tax expense
| $ | 56 |  |  | $ | 5 |  |  | $ | — |  |  | Net income
Change in unrecognized pension cost on defined benefit pension plan |  |  |  |  |  |  |
| $ | 176 |  |  | $ | 268 |  |  | $ | 345 |  |  | Other noninterest expenses
| 37 |  |  | 56 |  |  | 72 |  |  | Federal income tax expense
| $ | 139 |  |  | $ | 212 |  |  | $ | 273 |  |  | Net income

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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