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Revenue Recognition (Schedule Of Disaggregated Revenue) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Gross revenue | $ 363,416 | $ 319,105
Net revenue | 354,007 | 310,478
Roto-Rooter [Member] |  |
Gross revenue | 242,381 | 256,869
Implicit price concessions and credit memos | (7,155) | (7,190)
Net revenue | 235,226 | 249,679
Roto-Rooter [Member] | Drain cleaning [Member] |  |
Gross revenue | 61,621 | 66,489
Roto-Rooter [Member] | Plumbing [Member] |  |
Gross revenue | 48,098 | 50,453
Roto-Rooter [Member] | Excavation [Member] |  |
Gross revenue | 58,618 | 59,576
Roto-Rooter [Member] | Other [Member] |  |
Gross revenue | 244 | 193
Roto-Rooter [Member] | Short-Term Core [Member] |  |
Gross revenue | 168,581 | 176,711
Roto-Rooter [Member] | Water Restoration [Member] |  |
Gross revenue | 46,678 | 50,762
Roto-Rooter [Member] | Independent Contractors [Member] |  |
Gross revenue | 19,616 | 23,300
Roto-Rooter [Member] | Franchise Fees [Member] |  |
Gross revenue | 1,491 | 1,351
Roto-Rooter [Member] | Other [Member] |  |
Gross revenue | $ 6,015 | $ 4,745

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