Equity Investees (Consolidated Financial Statements Related to Equity Investees) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Equity Method Investments and Joint Ventures [Abstract]
Genesis’ share of operating earnings	$ 16,122,000	$ 14,411,000	$ 55,776,000	$ 46,365,000
Amortization of differences attributable to Genesis’ carrying value of equity investments	(3,566,000)	(3,566,000)	(10,698,000)	(10,698,000)
Equity in earnings of equity investees	12,556,000	10,845,000	45,078,000	35,667,000
Distributions received	$ 19,217,000	$ 16,078,000	$ 59,728,000	$ 52,587,000