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Asset Retirement Obligations (Tables) | 9 Months Ended
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Sep. 30, 2020
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Change in Asset Retirement Obligation | A reconciliation of the Company's beginning and ending aggregate carrying amount of the asset retirement obligations is as follows:
|  | Coal Mining |  | NAMining |  | Unallocated Items |  | NACCO Consolidated
Balance at December 31, 2019 |  | $ | 19,015 |  |  | $ | 604 |  |  | $ | 17,240 |  |  | $ | 36,859 |
Liabilities incurred during the period |  | 9,809 |  |  | — |  |  | — |  |  | 9,809 |
Liabilities settled during the period |  | (5,957) |  |  | — |  |  | (562) |  |  | (6,519) |
Accretion expense |  | 1,296 |  |  | 28 |  |  | 1,023 |  |  | 2,347 |
Revision of estimated cash flows |  | 600 |  |  | — |  |  | — |  |  | 600 |
Balance at September 30, 2020 |  | $ | 24,763 |  |  | $ | 632 |  |  | $ | 17,701 |  |  | $ | 43,096 |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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