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Revenue Recognition (Schedule Of Disaggregated Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Net revenues	$ 646,943	$ 589,233
Roto-Rooter [Member]
Gross revenue	248,870	242,381
Implicit price concessions and credit memos	(9,327)	(7,155)
Net revenues	239,543	235,226
Roto-Rooter [Member] | Short-Term Core [Member]
Gross revenue	170,026	168,581
Roto-Rooter [Member] | Drain cleaning [Member]
Gross revenue	59,542	61,621
Roto-Rooter [Member] | Plumbing [Member]
Gross revenue	46,059	48,098
Roto-Rooter [Member] | Excavation [Member]
Gross revenue	64,239	58,618
Roto-Rooter [Member] | Other [Member]
Gross revenue	186	244
Roto-Rooter [Member] | Water Restoration [Member]
Gross revenue	54,163	46,678
Roto-Rooter [Member] | Independent Contractors [Member]
Gross revenue	18,362	19,616
Roto-Rooter [Member] | Franchisee Fees [Member]
Gross revenue	1,424	1,491
Roto-Rooter [Member] | Other [Member]
Gross revenue	$ 4,895	$ 6,015

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