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Revenue Recognition (Schedule Of Disaggregated Revenue) (Details) - Roto-Rooter [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Subtotal | $ 225,429 | $ 177,341 | $ 442,245 | $ 361,963
Implicit price concessions and credit memos | (5,108) | (2,607) | (10,352) | (9,346)
Net revenue | 220,321 | 174,734 | 431,893 | 352,617
Short-Term Core Service Jobs [Member] |  |  |  |
Subtotal | 162,683 | 126,541 | 318,032 | 260,965
Water Restoration [Member] |  |  |  |
Subtotal | 38,583 | 31,426 | 76,018 | 60,672
Contractor Revenue [Member] |  |  |  |
Subtotal | 19,026 | 15,193 | 37,785 | 31,421
Franchise Fees [Member] |  |  |  |
Subtotal | 1,255 | 1,210 | 2,582 | 2,400
All Other [Member] |  |  |  |
Subtotal | $ 3,882 | $ 2,971 | $ 7,828 | $ 6,505

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