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Revenue Recognition (Schedule Of Disaggregated Revenue) (Details) - Roto-Rooter [Member] - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Subtotal | $ 196,067 | $ 162,888 | $ 558,030 | $ 488,299
Implicit price concessions and credit memos | (4,867) | (4,023) | (14,213) | (13,347)
Net revenue | 191,200 | 158,865 | 543,817 | 474,952
Short-Term Core Service Jobs [Member] |  |  |  |
Subtotal | 143,089 | 116,277 | 404,054 | 344,673
Water Restoration [Member] |  |  |  |
Subtotal | 32,137 | 27,642 | 92,810 | 86,804
Contractor Revenue [Member] |  |  |  |
Subtotal | 16,274 | 14,359 | 47,695 | 42,986
Franchise Fees [Member] |  |  |  |
Subtotal | 1,235 | 1,819 | 3,635 | 5,063
All Other [Member] |  |  |  |
Subtotal | $ 3,332 | $ 2,791 | $ 9,836 | $ 8,773

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