BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 2,597	$ 596
Accounts receivable, net	78,386	71,626
Accounts receivable from affiliates	14,701	1,983
Accrued unbilled revenues	118,360	129,287
Inventories	32,455	43,231
Regulatory assets	36,554	52,006
Derivative instruments	19,355	23,776
Deferred income taxes	91,672	51,854
Prepayments and other	52,854	31,476
Total current assets	446,934	405,835
Property, plant and equipment, net	3,948,839	3,743,141
Other assets
Regulatory assets	308,519	323,305
Derivative instruments	29,218	33,164
Other	14,918	15,859
Total other assets	352,655	372,328
Total assets	4,748,428	4,521,304
Current liabilities
Short-term debt	209,000	37,000
Borrowings under utility money pool arrangement	0	16,000
Accounts payable	148,722	160,762
Accounts payable to affiliates	14,970	19,790
Regulatory liabilities	115,316	87,723
Taxes accrued	24,017	27,208
Accrued interest	17,071	17,057
Dividends payable	23,025	27,828
Derivative instruments	3,565	3,565
Other	90,838	80,211
Total current liabilities	646,524	477,144
Deferred credits and other liabilities
Deferred income taxes	899,063	849,145
Regulatory liabilities	105,051	115,188
Asset retirement obligations	26,713	26,031
Derivative instruments	28,860	30,643
Pension and employee benefit obligations	93,166	103,670
Other	9,643	9,320
Total deferred credits and other liabilities	$ 1,162,496	$ 1,133,997
Commitments and contingencies
Capitalization
Long-term debt	$ 1,349,858	$ 1,349,691
Common stock — 200 shares authorized of $1.00 par value; 100 shares outstanding at June 30, 2015 and Dec. 31, 2014, respectively	0	0
Additional paid in capital	1,199,998	1,165,463
Retained earnings	390,456	395,998
Accumulated other comprehensive loss	(904)	(989)
Total common stockholder’s equity	1,589,550	1,560,472
Total liabilities and equity	$ 4,748,428	$ 4,521,304