Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Electric plant:
In service	$ 8,937,200	$ 8,886,407
Less: Accumulated provision for depreciation	(4,346,210)	(4,302,332)
Net in service	4,590,990	4,584,075
Nuclear fuel, at amortized cost	361,540	358,562
Construction work in progress	3,141,306	2,935,868
Total electric plant	8,093,836	7,878,505
Investments and funds:
Nuclear decommissioning trust fund	440,650	445,055
Investment in associated companies	76,247	74,981
Long-term investments	144,260	140,622
Restricted investments	613,588	653,585
Other	22,900	22,562
Total investments and funds	1,297,645	1,336,805
Current assets:
Cash and cash equivalents	249,110	397,695
Restricted short-term investments	239,492	229,324
Receivables	127,742	156,781
Inventories, at average cost	271,625	266,219
Prepayments and other current assets	17,134	18,884
Total current assets	905,103	1,068,903
Deferred charges
Regulatory assets	594,908	585,084
Prepayments to Georgia Power Company	35,613	45,575
Other	13,384	13,267
Total deferred charges	643,905	643,926
Total assets	10,940,489	10,928,139
Capitalization:
Patronage capital and membership fees	938,487	911,087
Long-term debt	7,573,810	7,927,562
Obligations under capital leases	87,192	87,192
Other	20,390	20,051
Total capitalization	8,619,879	8,945,892
Current liabilities:
Long-term debt and capital lease due within one year	546,338	216,694
Short-term borrowings	258,797	190,626
Accounts payable	156,973	212,868
Accrued interest	78,452	79,510
Member power bill prepayments, current	64,947	6,171
Other current liabilities	40,051	55,136
Total current liabilities	1,145,558	761,005
Deferred credits and other liabilities:
Asset retirement obligations	744,067	734,997
Member power bill prepayments, non-current	153,500	203,615
Regulatory liabilities	246,386	251,649
Other	31,099	30,981
Total deferred credits and other liabilities	1,175,052	1,221,242
Total equity and liabilities	$ 10,940,489	$ 10,928,139