Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Electric plant:
In service	$ 9,445,734	$ 9,266,627
Right-of-use assets—finance leases	302,732	302,732
Less: Accumulated provision for depreciation	(5,288,246)	(5,183,589)
Electric plant in service, net	4,460,220	4,385,770
Nuclear fuel, at amortized cost	397,574	388,303
Construction work in progress	8,057,892	7,716,035
Total electric plant	12,915,686	12,490,108
Investments and funds:
Nuclear decommissioning trust fund	598,357	540,716
Investment in associated companies	78,320	78,937
Long-term investments	657,779	669,479
Other	33,503	32,561
Total investments and funds	1,367,959	1,321,693
Current assets:
Cash and cash equivalents	459,368	595,381
Restricted cash and short-term investments	5,600	104,431
Short-term investments	90,147	61,702
Receivables	179,775	220,015
Inventories, at average cost	322,255	297,951
Prepayments and other current assets	31,699	51,409
Total current assets	1,088,844	1,330,889
Deferred charges and other assets:
Regulatory assets	1,198,819	1,212,305
Prepayments to Georgia Power Company	6,260	20,873
Other	51,334	113,502
Total deferred charges	1,256,413	1,346,680
Total assets	16,628,902	16,489,370
Capitalization:
Patronage capital and membership fees	1,234,951	1,192,127
Long-term debt	11,350,650	11,512,513
Obligation under finance leases	48,388	52,937
Obligation under Rocky Mountain transactions	28,888	27,945
Other	1,825	2,256
Total capitalization	12,664,702	12,787,778
Current liabilities:
Long-term debt and finance leases due within one year	315,213	322,102
Short-term borrowings	1,064,888	655,650
Accounts payable	129,252	203,705
Accrued interest	82,753	105,452
Member power bill prepayments, current	44,047	54,443
Other current liabilities	83,299	153,941
Total current liabilities	1,719,452	1,495,293
Deferred credits and other liabilities:
Asset retirement obligations	1,458,257	1,343,743
Member power bill prepayments, non-current	51,255	53,877
Regulatory liabilities	719,364	792,190
Other	15,872	16,489
Total deferred credits and other liabilities	2,244,748	2,206,299
Total equity and liabilities	$ 16,628,902	$ 16,489,370