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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2021
Equity [Abstract] |
Summary of the components of accumulated other comprehensive income | The following table summarizes the changes in AOCI by component for the:
| Three Months Ended September 30
| 2021 |  | 2020
| Unrealized Gains (Losses) on AFS Securities |  | Unrealized Gains (Losses) on Derivative Instruments |  | Defined Benefit Pension Plan |  | Total |  | Unrealized Gains (Losses) on AFS Securities |  | Unrealized Gains (Losses) on Derivative Instruments |  | Defined Benefit Pension Plan |  | Total
Balance, July 1 | $ | 8,469 |  |  | $ | — |  |  | $ | (2,745) |  |  | $ | 5,724 |  |  | $ | 11,139 |  |  | $ | (77) |  |  | $ | (2,695) |  |  | $ | 8,367 |
OCI before reclassifications | (1,690) |  |  | — |  |  | — |  |  | (1,690) |  |  | (66) |  |  | 20 |  |  | — |  |  | (46) |
Tax effect | 353 |  |  | — |  |  | — |  |  | 353 |  |  | 58 |  |  | (4) |  |  |  |  | 54 |
OCI, net of tax | (1,337) |  |  | — |  |  | — |  |  | (1,337) |  |  | (8) |  |  | 16 |  |  | — |  |  | 8 |
Balance, September 30 | $ | 7,132 |  |  | $ | — |  |  | $ | (2,745) |  |  | $ | 4,387 |  |  | $ | 11,131 |  |  | $ | (61) |  |  | $ | (2,695) |  |  | $ | 8,375 |
| Nine Months Ended September 30
| 2021 |  | 2020
| Unrealized Gains (Losses) on AFS Securities |  | Unrealized Gains (Losses) on Derivative Instruments |  | Defined Benefit Pension Plan |  | Total |  | Unrealized Gains (Losses) on AFS Securities |  | Unrealized Gains (Losses) on Derivative Instruments |  | Defined Benefit Pension Plan |  | Total
Balance, January 1 | $ | 10,485 |  |  | $ | (42) |  |  | $ | (2,745) |  |  | $ | 7,698 |  |  | $ | 4,612 |  |  | $ | 54 |  |  | $ | (2,695) |  |  | $ | 1,971 |
OCI before reclassifications | (4,247) |  |  | 53 |  |  | — |  |  | (4,194) |  |  | 8,304 |  |  | (145) |  |  | — |  |  | 8,159 |
Amounts reclassified from AOCI | — |  |  | — |  |  | — |  |  | — |  |  | (71) |  |  | — |  |  | — |  |  | (71) |
Subtotal | (4,247) |  |  | 53 |  |  | — |  |  | (4,194) |  |  | 8,233 |  |  | (145) |  |  | — |  |  | 8,088 |
Tax effect | 894 |  |  | (11) |  |  | — |  |  | 883 |  |  | (1,714) |  |  | 30 |  |  | — |  |  | (1,684) |
OCI, net of tax | (3,353) |  |  | 42 |  |  | — |  |  | (3,311) |  |  | 6,519 |  |  | (115) |  |  | — |  |  | 6,404 |
Balance, September 30 | $ | 7,132 |  |  | $ | — |  |  | $ | (2,745) |  |  | $ | 4,387 |  |  | $ | 11,131 |  |  | $ | (61) |  |  | $ | (2,695) |  |  | $ | 8,375 |
A summary of the components of unrealized gains on AFS securities included in OCI follows for the:
| Three Months Ended September 30
| 2021 |  | 2020
| 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 | $ | (14) |  |  | $ | (1,676) |  |  | $ | (1,690) |  |  | $ | 215 |  |  | $ | (281) |  |  | $ | (66) |
Tax effect | — |  |  | 353 |  |  | 353 |  |  | — |  |  | 58 |  |  | 58 |
Unrealized gains (losses), net of tax | $ | (14) |  |  | $ | (1,323) |  |  | $ | (1,337) |  |  | $ | 215 |  |  | $ | (223) |  |  | $ | (8) |
| Nine Months Ended September 30
| 2021 |  | 2020
| 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 | $ | 9 |  |  | $ | (4,256) |  |  | $ | (4,247) |  |  | $ | 75 |  |  | $ | 8,229 |  |  | $ | 8,304 |
Reclassification adjustment for net (gains) losses included in net income | — |  |  | — |  |  | — |  |  | — |  |  | (71) |  |  | (71) |
Net unrealized gains (losses) | 9 |  |  | (4,256) |  |  | (4,247) |  |  | 75 |  |  | 8,158 |  |  | 8,233 |
Tax effect | — |  |  | 894 |  |  | 894 |  |  | — |  |  | (1,714) |  |  | (1,714) |
Unrealized gains (losses), net of tax | $ | 9 |  |  | $ | (3,362) |  |  | $ | (3,353) |  |  | $ | 75 |  |  | $ | 6,444 |  |  | $ | 6,519 |

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