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Accumulated Other Comprehensive Loss (Tables) | 3 Months Ended
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Mar. 31, 2020
Equity |
Summary of Changes in Accumulated Other Comprehensive Loss by Component | Changes in accumulated other comprehensive loss by component for the three months ended March 31, 2020 and 2019 consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Other-Than- | ​ | ​ | ​ | ​ | ​
​ | ​ | Minimum | ​ | Temporary | ​ | ​ | ​ | ​ | ​
​ | ​ | Pension | ​ | Impairment of | ​ | Interest Rate | ​ | ​ | ​
​ |  | Liability |  | Investment |  | Derivatives |  | Total
Balance, December 31, 2019 | ​ | $ | (23,916) | ​ | $ | (5,877) | ​ | $ | 1,634 | ​ | $ | (28,159)
Losses arising during period | ​ | ​ | (1,107) | ​ | ​ | — | ​ | ​ | (35,947) | ​ | ​ | (37,054)
Amounts reclassified from accumulated other comprehensive loss | ​ | ​ | 17 | ​ |  | 52 | ​ |  | (452) | ​ |  | (383)
Net other comprehensive income (loss) | ​ |  | (1,090) | ​ |  | 52 | ​ |  | (36,399) | ​ |  | (37,437)
Transition adjustment related to adoption of ASU 2016-13 (see Note 1) | ​ | ​ | — | ​ | ​ | 2,158 | ​ | ​ | — | ​ | ​ | 2,158
Balance, March 31, 2020 | ​ | $ | (25,006) | ​ | $ | (3,667) | ​ | $ | (34,765) | ​ | $ | (63,438)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Other-Than- | ​ | ​ | ​ | ​ | ​
​ | ​ | Minimum | ​ | Temporary | ​ | ​ | ​ | ​ | ​
​ | ​ | Pension | ​ | Impairment of | ​ | Interest Rate | ​ | ​ | ​
​ |  | Liability |  | Investment |  | Derivatives |  | Total
Balance, December 31, 2018 | ​ | $ | (21,814) | ​ | $ | (6,210) | ​ | $ | — | ​ | $ | (28,024)
Amounts reclassified from accumulated other comprehensive loss | ​ |  | 20 | ​ |  | 83 | ​ |  | — | ​ |  | 103
Income tax benefit | ​ |  | 6 | ​ |  | — | ​ |  | — | ​ |  | 6
Net other comprehensive income | ​ |  | 26 | ​ |  | 83 | ​ |  | — | ​ |  | 109
Transition adjustment related to adoption of ASU 2018-02 | ​ | ​ | (2,707) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (2,707)
Balance, March 31, 2019 | ​ | $ | (24,495) | ​ | $ | (6,127) | ​ | $ | — | ​ | $ | (30,622)

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: 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=118930883&loc=SL7669686-108580 + Details
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