Equity Investees (Consolidated Financial Statements Related to Equity Investees) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Equity Method Investments and Joint Ventures [Abstract]
Genesis’ share of operating earnings	$ 17,728,000	$ 16,058,000
Amortization of differences attributable to Genesis’ carrying value of equity investments	(3,566,000)	(3,566,000)
Equity in earnings of equity investees	14,162,000	12,492,000
Distributions received	$ 19,683,000	$ 18,584,000