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Shareholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2021
Equity [Abstract] |
Schedule of Components of AOCI, Net of Tax | The changes in the balance of each component of AOCI for the three and nine months ended September 30, 2021 and 2020 were as follows:
(In thousands) | Unrealized Investment Gains (Losses) |  | Non-credit Impairments |  | Unrecognized Change in Defined Benefit Plan Liabilities* |  | Accumulated Other Comprehensive Income (Loss)
Balance, July 1, 2021 | $ | 53,168 |  |  | $ | — |  |  | $ | (96) |  |  | $ | 53,072 |
OCI, before reclassifications, net of tax | (10,158) |  |  | — |  |  | — |  |  | (10,158) |
Amounts reclassified from AOCI, net of tax | (1,503) |  |  | — |  |  | 96 |  |  | (1,407) |
Net OCI, current period | (11,661) |  |  | — |  |  | 96 |  |  | (11,565) |
Balance, September 30, 2021 | $ | 41,507 |  |  | $ | — |  |  | $ | — |  |  | $ | 41,507 |
(In thousands) | Unrealized Investment Gains (Losses) |  | Non-credit Impairments |  | Unrecognized Change in Defined Benefit Plan Liabilities* |  | Accumulated Other Comprehensive Income (Loss)
Balance, December 31, 2020 | $ | 75,388 |  |  | $ | (57) |  |  | $ | (104) |  |  | $ | 75,227 |
OCI, before reclassifications, net of tax | (24,655) |  |  | — |  |  | 8 |  |  | (24,647) |
Amounts reclassified from AOCI, net of tax | (9,226) |  |  | 57 |  |  | 96 |  |  | (9,073) |
Net OCI, current period | (33,881) |  |  | 57 |  |  | 104 |  |  | (33,720) |
Balance, September 30, 2021 | $ | 41,507 |  |  | $ | — |  |  | $ | — |  |  | $ | 41,507 |
(In thousands) | Unrealized Investment Gains (Losses) |  | Non-credit Impairments |  | Unrecognized Change in Defined Benefit Plan Liabilities* |  | Accumulated Other Comprehensive Income (Loss)
Balance, July 1, 2020 | $ | 61,912 |  |  | $ | (704) |  |  | $ | (78) |  |  | $ | 61,130 |
OCI, before reclassifications, net of tax | 9,505 |  |  | — |  |  | (22) |  |  | 9,483 |
Amounts reclassified from AOCI, net of tax | (2,975) |  |  | 647 |  |  | — |  |  | (2,328) |
Net OCI, current period | 6,530 |  |  | 647 |  |  | (22) |  |  | 7,155 |
Balance, September 30, 2020 | $ | 68,442 |  |  | $ | (57) |  |  | $ | (100) |  |  | $ | 68,285 |
(In thousands) | Unrealized Investment Gains (Losses) |  | Non-credit Impairments |  | Unrecognized Change in Defined Benefit Plan Liabilities* |  | Accumulated Other Comprehensive Income (Loss)
Balance, December 31, 2019 | $ | 37,333 |  |  | $ | (300) |  |  | $ | (78) |  |  | $ | 36,955 |
OCI, before reclassifications, net of tax | 37,199 |  |  | (187) |  |  | (22) |  |  | 36,990 |
Amounts reclassified from AOCI, net of tax | (6,090) |  |  | 430 |  |  | — |  |  | (5,660) |
Net OCI, current period | 31,109 |  |  | 243 |  |  | (22) |  |  | 31,330 |
Balance, September 30, 2020 | $ | 68,442 |  |  | $ | (57) |  |  | $ | (100) |  |  | $ | 68,285 |
* The Company terminated Eastern's defined benefit plan, effective September 30, 2021, resulting in a settlement of the liabilities under the plan and the net loss previously reflected in AOCI being recognized in earnings for the three and nine months ended September 30, 2021. As a result of the NORCAL acquisition, the Company sponsors another frozen defined benefit plan (see Note 16). Due to the application of GAAP purchase accounting (see Note 2), there were no amounts recorded in AOCI related to this plan as of September 30, 2021 as the plan assets and benefit obligation are not remeasured on a quarterly basis.

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