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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2021
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Loss | Changes in accumulated other comprehensive income (loss) ("AOCI") by component, including items reclassified out of AOCI, were as follows:
|  |  |  | Three Months Ended March 31, 2021
(in thousands) |  |  |  | Defined Benefit Pension Items |  | Other |  | Total
Beginning balance, December 31, 2020 |  |  |  | $ | (99,789) |  |  | $ | (330) |  |  | $ | (100,119) |
Other comprehensive income (loss) before reclassifications |  |  |  | — |  |  | — |  |  | — |
Amounts reclassified from AOCI, net of tax of $374(a) |  |  |  | 1,187 |  |  | 18 |  |  | 1,205 |
Net current-period other comprehensive income (loss) |  |  |  | 1,187 |  |  | 18 |  |  | 1,205 |
Ending balance, March 31, 2021 |  |  |  | $ | (98,602) |  |  | $ | (312) |  |  | $ | (98,914) |
|  |  |  | Three Months Ended March 31, 2020
(in thousands) |  |  |  | Defined Benefit Pension Items |  | Other |  | Total
Beginning balance, December 31, 2019 |  |  |  | $ | (98,734) |  |  | $ | (255) |  |  | $ | (98,989) |
Other comprehensive income (loss) before reclassifications |  |  |  | — |  |  | — |  |  | — |
Amounts reclassified from AOCI, net of tax of $286(a) |  |  |  | 902 |  |  | 6 |  |  | 908 |
Net current-period other comprehensive income (loss) |  |  |  | 902 |  |  | 6 |  |  | 908 |
Ending balance, March 31, 2020 |  |  |  | $ | (97,832) |  |  | $ | (249) |  |  | $ | (98,081) |
(a) Actuarial gain (loss) is included in defined benefit pension plan expense in the Condensed Consolidated Statements of Operations

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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