Equity Investees (Consolidated Financial Statements Related to Equity Investees) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Equity Method Investments and Joint Ventures [Abstract]
Genesis’ share of operating earnings	$ 15,896,000	$ 15,779,000	$ 31,954,000	$ 35,786,000
Amortization of differences attributable to Genesis’ carrying value of equity investments	(3,566,000)	(3,566,000)	(7,132,000)	(7,132,000)
Equity in earnings of equity investees	12,330,000	12,213,000	24,822,000	28,654,000
Distributions received	$ 17,925,000	$ 17,092,000	$ 36,509,000	$ 40,341,000