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Revenue Recognition (Schedule Of Disaggregated Revenue) (Details) - Roto-Rooter [Member] - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Subtotal | $ 184,622 | $ 160,054
Implicit price concessions and credit memos | (6,740) | (4,801)
Net revenue | 177,882 | 155,253
Short-Term Core Service Jobs [Member] |  |
Subtotal | 134,424 | 112,185
Water Restoration [Member] |  |
Subtotal | 29,246 | 29,208
Contractor Revenue [Member] |  |
Subtotal | 16,228 | 14,032
Franchise Fees [Member] |  |
Subtotal | 1,190 | 1,621
All Other [Member] |  |
Subtotal | $ 3,534 | $ 3,008

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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