Condensed Consolidated Statements Of Revenues, Expenses, And Patronage Capital (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Operating Revenues	$ 262,611	$ 254,140	$ 534,095	$ 530,053
Type of Revenue [Extensible List]	us-gaap:ElectricityMember	us-gaap:ElectricityMember	us-gaap:ElectricityMember	us-gaap:ElectricityMember
Operating Expenses:
Fuel	$ 42,043	$ 35,005	$ 99,609	$ 100,833
Purchased power	56,746	46,029	165,258	157,270
Transmission	49,189	42,519	99,052	84,588
Deferred energy	36,287	58,418	23,363	47,692
Operations and maintenance	29,332	22,829	47,295	41,487
Administrative and general	12,308	10,425	24,572	21,242
Depreciation and amortization	17,519	17,402	35,016	34,665
Amortization of regulatory asset/(liability), net	11,543	781	11,555	487
Accretion of asset retirement obligations	1,572	1,519	3,143	3,037
Taxes, other than income taxes	2,203	2,335	4,621	4,593
Total Operating Expenses	258,742	237,262	513,484	495,894
Operating Margin	3,869	16,878	20,611	34,159
Other income (expense), net	(57)	(152)	(1)	(207)
Investment income	13,439	2,515	15,313	3,907
Interest charges, net	(14,225)	(15,940)	(29,643)	(31,208)
Income taxes	(17)	(14)	(33)	(79)
Net Margin including Non-controlling interest	3,009	3,287	6,247	6,572
Non-controlling interest	(47)	(40)	(95)	(197)
Net Margin attributable to ODEC	2,962	3,247	6,152	6,375
Patronage Capital - Beginning of Period	491,825	479,210	488,635	476,082
Patronage Capital - End of Period	$ 494,787	$ 482,457	$ 494,787	$ 482,457