BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 46,391	$ 844
Accounts receivable, net	96,614	74,190
Accounts receivable from affiliates	3,737	949
Accrued unbilled revenues	133,100	119,418
Inventories	41,350	38,505
Regulatory assets	38,021	38,721
Derivative instruments	23,597	5,114
Prepaid taxes	3,233	21,779
Prepayments and other	7,040	7,855
Total current assets	393,083	307,375
Property, plant and equipment, net	4,947,114	4,695,819
Other assets
Regulatory assets	343,685	346,683
Derivative instruments	19,743	22,113
Other	12,193	7,477
Total other assets	375,621	376,273
Total assets	5,715,818	5,379,467
Current liabilities
Short-term debt	0	50,000
Accounts payable	183,437	176,157
Accounts payable to affiliates	11,935	14,414
Regulatory liabilities	70,355	41,577
Taxes accrued	56,386	39,742
Accrued interest	21,430	19,162
Dividends payable	26,166	30,870
Derivative instruments	3,565	3,565
Other	27,723	29,703
Total current liabilities	400,997	405,190
Deferred credits and other liabilities
Deferred income taxes	1,090,921	989,137
Regulatory liabilities	222,956	233,454
Asset retirement obligations	29,808	28,663
Derivative instruments	20,840	23,513
Pension and employee benefit obligations	86,291	107,872
Other	8,307	24,084
Total deferred credits and other liabilities	1,459,123	1,406,723
Commitments and contingencies
Capitalization
Long-term debt	1,829,965	1,635,858
Common stock — 200 shares authorized of $1.00 par value; 100 shares outstanding at Sept. 30, 2017 and Dec. 31, 2016, respectively	0	0
Additional paid in capital	1,489,882	1,446,223
Retained earnings	537,066	486,763
Accumulated other comprehensive loss	(1,215)	(1,290)
Total common stockholder’s equity	2,025,733	1,931,696
Total liabilities and equity	$ 5,715,818	$ 5,379,467