Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Electric plant:
In service	$ 8,849,600	$ 8,786,839
Less: Accumulated provision for depreciation	(4,210,083)	(4,115,339)
Net in service	4,639,517	4,671,500
Nuclear fuel, at amortized cost	367,542	377,653
Construction work in progress	3,639,944	3,228,214
Total electric plant	8,647,003	8,277,367
Investments and funds:
Nuclear decommissioning trust fund	414,130	386,029
Investment in associated companies	73,877	72,783
Long-term investments	118,659	99,874
Restricted investments	208,975	221,122
Other	21,363	20,730
Total investments and funds	837,004	800,538
Current assets:
Cash and cash equivalents	286,106	366,290
Restricted short-term investments	185,117	247,006
Receivables	151,044	155,042
Inventories, at average cost	266,728	259,831
Prepayments and other current assets	21,906	32,919
Total current assets	910,901	1,061,088
Deferred charges:
Regulatory assets	565,264	545,387
Other	15,401	16,733
Total deferred charges	580,665	562,120
Total assets	10,975,573	10,701,113
Capitalization:
Patronage capital and membership fees	902,690	859,810
Accumulated other comprehensive margin	(408)	(370)
Total patronage capital and membership fees and accumulated other comprehensive margin	902,282	859,440
Long-term debt	7,853,581	7,892,836
Obligations under capital lease	89,710	92,096
Other	19,398	18,765
Total capitalization	8,864,971	8,863,137
Current liabilities:
Long-term debt and capital lease due within one year	154,805	316,861
Short-term borrowings	528,097	102,168
Accounts payable	139,704	73,801
Accrued interest	61,690	93,634
Member power bill prepayments, current	119,957	176,988
Other current liabilities	46,662	59,979
Total current liabilities	1,050,915	823,431
Deferred credits and other liabilities:
Asset retirement obligations	715,082	698,051
Member power bill prepayments, non-current	56,315	48,115
Contract retainage	40,379	40,008
Regulatory liabilities	217,392	197,748
Other	30,519	30,623
Total deferred credits and other liabilities	1,059,687	1,014,545
Total equity and liabilities	$ 10,975,573	$ 10,701,113