Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Electric plant:
In service	$ 9,864,049	$ 9,865,660
Right-of-use assets—finance leases	302,732	302,732
Less: Accumulated provision for depreciation	(5,682,179)	(5,565,724)
Net in service	4,484,602	4,602,668
Nuclear fuel, at amortized cost	383,403	375,267
Construction work in progress	6,981,823	6,779,392
Total electric plant	11,849,828	11,757,327
Investments and funds:
Nuclear decommissioning trust fund	615,247	659,910
Investment in associated companies	76,389	75,826
Long-term investments	702,821	711,379
Restricted investments	0	73,702
Other	32,432	31,991
Total investments and funds	1,426,889	1,552,808
Current assets:
Cash and cash equivalents	467,353	579,350
Restricted cash and short-term investments	236,015	248,150
Receivables	160,085	159,538
Inventories, at average cost	261,294	260,526
Prepayments and other current assets	105,234	60,486
Total current assets	1,229,981	1,308,050
Deferred charges and other assets:
Regulatory assets	1,088,130	1,008,790
Prepayments to Georgia Power Company	30,062	27,124
Other	112,179	52,927
Total deferred charges	1,230,371	1,088,841
Total assets	15,737,069	15,707,026
Capitalization:
Patronage capital and membership fees	1,152,403	1,130,423
Long-term debt	10,945,787	10,529,449
Obligation under finance leases	61,335	61,335
Other	27,893	27,701
Total capitalization	12,187,418	11,748,908
Current liabilities:
Long-term debt and finance leases due within one year	346,516	281,238
Short-term borrowings	663,067	1,095,971
Accounts payable	63,488	182,164
Accrued interest	77,748	96,410
Member power bill prepayments, current	26,754	26,102
Other current liabilities	80,240	36,123
Total current liabilities	1,257,813	1,718,008
Deferred credits and other liabilities:
Asset retirement obligations	1,299,183	1,287,143
Member power bill prepayments, non-current	71,361	80,001
Regulatory liabilities	898,095	849,449
Other	23,199	23,517
Total deferred credits and other liabilities	2,291,838	2,240,110
Total equity and liabilities	$ 15,737,069	$ 15,707,026