Consolidated Statements of Financial Position - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Electric plant
In service	$ 5,759,052	$ 5,722,679
Construction work in progress	159,604	163,954
Total electric plant	5,918,656	5,886,633
Less allowances for depreciation and amortization	(2,761,762)	(2,739,924)
Net electric plant	3,156,894	3,146,709
Other plant	950,834	952,318
Less allowances for depreciation, amortization and depletion	(720,332)	(711,896)
Net other plant	230,502	240,422
Total property, plant and equipment	3,387,396	3,387,131
Other assets and investments
Investments in other associations	185,724	187,684
Investments in and advances to coal mines	1,537	1,619
Restricted cash and investments	188	3,408
Other noncurrent assets	15,361	15,264
Total other assets and investments	202,810	207,975
Current assets
Cash and cash equivalents	110,400	106,005
Restricted cash and investments	20,357	605
Deposits and advances	77,913	37,455
Accounts receivable—Utility Members	94,392	101,394
Other accounts receivable	16,118	23,123
Coal inventory	57,958	54,979
Materials and supplies	108,452	106,893
Total current assets	485,590	430,454
Deferred charges
Regulatory assets	911,418	919,483
Prepayment—NRECA Retirement Security Plan	4,029	5,372
Other	44,952	36,121
Total deferred charges	960,399	960,976
Total assets	5,036,195	4,986,536
Capitalization
Patronage capital equity	969,553	984,581
Accumulated other comprehensive loss	(949)	(839)
Noncontrolling interest	126,945	134,269
Total equity	1,095,549	1,118,011
Long-term debt	2,741,491	2,896,506
Total capitalization	3,837,040	4,014,517
Current liabilities
Utility Member advances	12,952	14,333
Accounts payable	136,313	123,674
Short-term borrowings	272,962	184,305
Accrued expenses	33,774	39,268
Current asset retirement obligations	19,783	21,635
Accrued interest	43,469	24,549
Accrued property taxes	26,169	31,986
Current maturities of long-term debt	341,159	223,523
Total current liabilities	886,581	663,273
Deferred credits and other liabilities
Regulatory liabilities	2,199	2,317
Deferred income tax liability	15,223	15,223
Asset retirement and environmental reclamation obligations	201,912	195,566
Other	81,610	84,125
Total deferred credits and other liabilities	300,944	297,231
Accumulated postretirement benefit and postemployment obligations	11,630	11,515
Total equity and liabilities	$ 5,036,195	$ 4,986,536