BALANCE SHEETS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 1,005	$ 1,011
Accounts receivable, net	90,316	70,951
Accounts receivable from affiliates	7,457	15,840
Investments Receivable in Utility Money Pool Arrangement	3,000	0
Accrued unbilled revenues	131,371	109,207
Inventories	43,395	37,138
Regulatory assets	44,090	27,595
Derivative instruments	30,132	17,826
Deferred income taxes	53,344	85,362
Prepayments and other	20,243	19,571
Total current assets	424,353	384,501
Property, plant and equipment, net	3,616,190	3,284,030
Other assets
Regulatory assets	274,816	290,415
Derivative instruments	35,137	41,056
Other	15,831	17,068
Total other assets	325,784	348,539
Total assets	4,366,327	4,017,070
Current liabilities
Short-term debt	0	84,000
Borrowings under utility money pool arrangement	0	38,000
Accounts payable	147,580	143,879
Accounts payable to affiliates	13,696	15,387
Regulatory liabilities	88,364	83,759
Taxes accrued	31,558	23,584
Accrued interest	27,377	16,883
Dividends payable	22,866	18,082
Derivative instruments	3,565	3,583
Other	81,868	75,355
Total current liabilities	416,874	502,512
Deferred credits and other liabilities
Deferred income taxes	818,465	757,778
Regulatory liabilities	100,488	81,504
Asset retirement obligations	20,194	19,375
Derivative instruments	31,534	34,207
Pension and employee benefit obligations	52,552	55,087
Other	4,504	3,051
Total deferred credits and other liabilities	1,027,737	951,002
Commitments and contingencies
Capitalization
Long-term debt	1,349,604	1,199,865
Common stock — 200 shares authorized of $1.00 par value; 100 shares outstanding at Sept. 30, 2014 and Dec. 31, 2013, respectively	0	0
Additional paid in capital	1,165,463	1,005,463
Retained earnings	407,681	359,389
Accumulated other comprehensive loss	(1,032)	(1,161)
Total common stockholder’s equity	1,572,112	1,363,691
Total liabilities and equity	$ 4,366,327	$ 4,017,070