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Acquisitions (Narrative) (Details) - USD ($) $ in Millions			3 Months Ended
Acquisitions (Narrative) (Details) - USD ($) $ in Millions	Aug. 02, 2019	Jul. 01, 2019	Mar. 31, 2020	Sep. 30, 2019
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, Oakland [Member]
Goodwill [Line Items]
Acquisition date			Jul. 01, 2019
Business combination cost		$ 18.0
Roto-Rooter [Member] \| HSW RR, Inc [Member]
Goodwill [Line Items]
Business combination cost	$ 120.0
Additional business combination cost	1.4
Revolving Credit Facility [Member]
Goodwill [Line Items]
Borrowing amount	$ 450.0