Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Electric plant:
In service	$ 8,741,230	$ 8,596,148
Less: Accumulated provision for depreciation	(4,011,683)	(3,925,838)
Total in service	4,729,547	4,670,310
Nuclear fuel, at amortized cost	375,723	373,145
Construction work in progress	3,008,270	2,868,669
Total electric plant	8,113,540	7,912,124
Investments and funds:
Nuclear decommissioning trust fund	375,440	363,829
Investment in associated companies	73,545	72,010
Long-term investments	95,139	86,771
Restricted cash and investments, long-term	103,116	134,690
Other	19,696	19,097
Total investments and funds	666,936	676,397
Current assets:
Cash and cash equivalents	347,369	213,038
Restricted short-term investments	251,864	253,204
Receivables	170,464	130,464
Inventories, at average cost	279,390	299,252
Prepayments and other current assets	17,611	16,913
Total current assets	1,066,698	912,871
Deferred charges:
Regulatory assets	538,290	530,254
Other	27,868	28,137
Total deferred charges	566,158	558,391
Total assets	10,413,332	10,059,783
Capitalization:
Patronage capital and membership fees	853,340	809,465
Accumulated other comprehensive margin	435	58
Total patronage capital and membership fees and accumulated other comprehensive margin	853,775	809,523
Long-term debt	7,865,127	7,291,154
Obligations under capital leases	94,358	96,501
Other	18,154	17,561
Total capitalization	8,831,414	8,214,739
Current liabilities:
Long-term debt and capital leases due within one year	191,623	189,840
Short-term borrowings	75,995	261,478
Accounts payable	71,846	157,432
Accrued interest	60,836	58,830
Members power bill prepayments, current	148,245	174,743
Other current liabilities	45,314	86,746
Total current liabilities	593,859	929,069
Deferred credits and other liabilities:
Asset retirement obligations	688,330	602,230
Member power bill prepayments, non-current	45,827	44,205
Contract retainage	39,165	66,515
Regulatory liabilities	184,823	166,967
Other	29,914	36,058
Total deferred credits and other liabilities	988,059	915,975
Total equity and liabilities	$ 10,413,332	$ 10,059,783