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Acquisitions (Narrative) (Details) - USD ($) $ in Millions |  |  |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 01, 2020 | Aug. 02, 2019 | Jul. 01, 2019 | Sep. 30, 2019 | Jun. 30, 2020
Reacquired Franchise Rights [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Average amortization period |  |  |  | 7 years 4 months 24 days |
Customer Relationships [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Average amortization period |  |  |  |  | 20 years 4 months 24 days
Non-Compete Agreements [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Average amortization period |  |  |  | 4 years |
Roto-Rooter, Bloomington [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquisition date |  |  |  |  | Jun. 01, 2020
Acquisition, in cash | $ 2.2 |  |  |  |
Roto-Rooter, Oakland [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquisition date |  |  |  |  | Jul. 01, 2019
Acquisition, in cash |  |  | $ 18.0 |  |
Roto-Rooter [Member] | HSW RR, Inc [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Acquisition, in cash |  | $ 120.0 |  |  |
Additional business combination cost |  | 1.4 |  |  |
Revolving Credit Facility [Member] |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Borrowing amount |  | $ 450.0 |  |  |

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