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Other net losses Other Losses (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Jul. 01, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Subsequent Event [Line Items] |  |  |
Acquisition and transition-related costs |  | $ 14,104 | $ 11,609
Tax reform |  | 11,728 | 0
Management succession and executive retirement expense |  | 12,639 | 0
Other |  | 22,840 | 15,085
Other losses |  | 61,311 | $ 26,694
Period for refund of taxes collected at the higher rate | 5 years |  |
Abandonment loss |  | $ 5,876 |

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- Definition The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(7)(ii)) -URI http://asc.fasb.org/extlink&oid=120398226&loc=d3e511914-122862 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-10(c)(3)(ii)(A)) -URI http://asc.fasb.org/extlink&oid=120398226&loc=d3e511914-122862 + Details
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