Revenue Recognition (Schedule Of Disaggregated Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Net revenues	$ 618,798	$ 595,880	$ 1,265,741	$ 1,185,113
Roto-Rooter [Member]
Gross revenue	230,982	228,119	479,854	470,502
Implicit price concessions and credit memos	(8,385)	(6,797)	(17,713)	(13,953)
Net revenues	222,597	221,322	462,141	456,549
Roto-Rooter [Member] \| Short-Term Core [Member]
Gross revenue	157,521	159,826	327,550	328,407
Roto-Rooter [Member] \| Drain cleaning [Member]
Gross revenue	55,557	57,865	115,099	119,486
Roto-Rooter [Member] \| Plumbing [Member]
Gross revenue	45,284	46,046	91,344	94,144
Roto-Rooter [Member] \| Excavation [Member]
Gross revenue	56,493	55,713	120,731	114,331
Roto-Rooter [Member] \| Other [Member]
Gross revenue	187	202	376	446
Roto-Rooter [Member] \| Water Restoration [Member]
Gross revenue	49,824	42,777	103,987	89,454
Roto-Rooter [Member] \| Independent Contractors [Member]
Gross revenue	17,449	18,255	35,811	37,871
Roto-Rooter [Member] \| Franchisee Fees [Member]
Gross revenue	1,405	1,398	2,828	2,890
Roto-Rooter [Member] \| Other [Member]
Gross revenue	$ 4,783	$ 5,863	$ 9,678	$ 11,880