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Revenue Recognition (Schedule Of Disaggregated Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Net revenue	$ 624,900	$ 606,181	$ 1,890,641	$ 1,791,294
Roto-Rooter [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	226,478	220,645	706,332	691,147
Implicit price concessions and credit memos	(9,319)	(5,870)	(27,032)	(19,823)
Net revenue	217,159	214,775	679,300	671,324
Roto-Rooter [Member] | Short-Term Core [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	158,529	153,673	486,078	482,080
Roto-Rooter [Member] | Drain cleaning [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	55,454	56,049	170,553	175,535
Roto-Rooter [Member] | Plumbing [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	45,753	43,471	137,097	137,614
Roto-Rooter [Member] | Excavation [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	57,102	53,935	177,833	168,266
Roto-Rooter [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	220	218	595	665
Roto-Rooter [Member] | Water Restoration [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	45,196	42,412	149,183	131,867
Roto-Rooter [Member] | Independent Contractors [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	16,871	17,698	52,682	55,569
Roto-Rooter [Member] | Franchisee Fees [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	1,433	1,454	4,262	4,344
Roto-Rooter [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	$ 4,449	$ 5,408	$ 14,127	$ 17,287

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