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Schedule II - Consolidated Valuation and Qualifying Accounts Schedule II - Consolidated Valuation and Qualifying Accounts Level 4 (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reserve for uncollectibe accounts |  |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Valuation Allowances and Reserves, Beginning Balance |  | $ 5,546 | $ 5,016 | $ 5,263
Valuation Allowances and Reserves, Charged to Income |  | 3,527 | 3,294 | 2,083
Valuation Allowances and Reserves, Charged (Credited) to Other Accounts |  | 975 | 540 | 640
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction | [1] | 4,463 | 3,304 | 2,970
Valuation Allowances and Reserves, Ending Balance |  | 5,585 | 5,546 | 5,016
Injuries and damages |  |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |  |
Valuation Allowances and Reserves, Beginning Balance |  | 2,802 | 3,780 | 2,484
Valuation Allowances and Reserves, Charged to Income |  | 974 | 2,495 | 2,032
Valuation Allowances and Reserves, Charged (Credited) to Other Accounts |  | 0 | 0 | 0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction | [1] | 501 | 3,473 | 736
Valuation Allowances and Reserves, Ending Balance |  | $ 3,275 | $ 2,802 | $ 3,780
[1] | Represents deductions from the reserves for purposes for which the reserves were created. In the case of uncollectible accounts, and notes reserves, includes reversals of amounts previously reserved.

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 + Details
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column C)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-4 + Details
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