BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 206,848	$ 834
Accounts receivable, net	91,299	71,166
Accounts receivable from affiliates	3,198	1,079
Accrued unbilled revenues	122,088	103,781
Inventories	39,037	37,546
Regulatory assets	28,417	31,541
Derivative instruments	4,478	12,952
Deferred income taxes	31,555	35,686
Prepaid taxes	22,021	35,666
Prepayments and other	9,006	20,520
Total current assets	557,947	350,771
Property, plant and equipment, net	4,579,219	4,348,823
Other assets
Regulatory assets	309,389	301,814
Derivative instruments	22,902	25,272
Other	8,862	3,449
Total other assets	341,153	330,535
Total assets	5,478,319	5,030,129
Current liabilities
Current portion of long-term debt	200,000	200,000
Short-term debt	0	15,000
Accounts payable	159,272	146,794
Accounts payable to affiliates	17,617	29,135
Regulatory liabilities	66,043	98,305
Taxes accrued	42,418	33,374
Accrued interest	31,129	17,781
Dividends payable	27,498	12,538
Derivative instruments	3,565	3,565
Other	29,807	35,654
Total current liabilities	577,349	592,146
Deferred credits and other liabilities
Deferred income taxes	996,111	896,430
Regulatory liabilities	233,777	229,584
Asset retirement obligations	28,314	27,233
Derivative instruments	24,404	27,078
Pension and employee benefit obligations	77,649	93,346
Other	21,366	17,841
Total deferred credits and other liabilities	1,381,621	1,291,512
Commitments and contingencies
Capitalization
Long-term debt	1,635,687	1,338,522
Common stock — 200 shares authorized of $1.00 par value; 100 shares outstanding at Sept. 30, 2016 and Dec. 31, 2015, respectively	0	0
Additional paid in capital	1,396,223	1,371,223
Retained earnings	488,556	438,007
Accumulated other comprehensive loss	(1,117)	(1,281)
Total common stockholder’s equity	1,883,662	1,807,949
Total liabilities and equity	$ 5,478,319	$ 5,030,129