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Revenue Recognition (Schedule Of Disaggregated Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Gross revenue	$ 399,148	$ 340,801	$ 1,145,473	$ 989,658
Net revenue	391,406	333,728	1,119,970	965,066
Roto-Rooter [Member]
Gross revenue	220,645	237,162	691,147	733,391
Implicit price concessions and credit memos	(5,870)	(6,358)	(19,823)	(19,952)
Net revenue	214,775	230,804	671,324	713,439
Roto-Rooter [Member] | Drain cleaning [Member]
Gross revenue	56,049	59,164	175,535	186,016
Roto-Rooter [Member] | Plumbing [Member]
Gross revenue	43,471	49,113	137,614	148,285
Roto-Rooter [Member] | Excavation [Member]
Gross revenue	53,935	56,904	168,266	174,032
Roto-Rooter [Member] | Other [Member]
Gross revenue	218	334	665	711
Roto-Rooter [Member] | Short-Term Core [Member]
Gross revenue	153,673	165,515	482,080	509,044
Roto-Rooter [Member] | Water Restoration [Member]
Gross revenue	42,412	45,435	131,867	141,176
Roto-Rooter [Member] | Independent Contractors [Member]
Gross revenue	17,698	20,509	55,569	65,684
Roto-Rooter [Member] | Franchisee Fees [Member]
Gross revenue	1,454	1,457	4,344	4,195
Roto-Rooter [Member] | Other [Member]
Gross revenue	$ 5,408	$ 4,246	$ 17,287	$ 13,292

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