BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 623	$ 10,871
Accounts receivable, net	101,870	79,581
Accounts receivable from affiliates	4,085	1,297
Investments in utility money pool arrangement	0	65,000
Accrued unbilled revenues	120,156	129,804
Inventories	33,401	40,433
Regulatory assets	23,387	31,538
Derivative instruments	28,436	15,882
Prepaid taxes	15,821	15,025
Prepayments and other	10,137	10,341
Total current assets	337,916	399,772
Property, plant and equipment, net	5,539,200	5,095,609
Other assets
Regulatory assets	366,885	362,943
Derivative instruments	16,584	18,954
Other	4,602	11,266
Total other assets	388,071	393,163
Total assets	6,265,187	5,888,544
Current liabilities
Short-term debt	35,000	0
Borrowings Payable Under Utility Money Pool Arrangement	23,000	0
Accounts payable	191,874	211,756
Accounts payable to affiliates	17,308	22,577
Regulatory liabilities	112,585	68,835
Taxes accrued	53,453	35,243
Accrued interest	20,396	23,275
Dividends payable	40,071	26,753
Derivative instruments	3,565	3,565
Other	25,548	29,641
Total current liabilities	522,800	421,645
Deferred credits and other liabilities
Deferred income taxes	601,294	574,906
Regulatory liabilities	795,424	784,564
Asset retirement obligations	29,664	28,524
Derivative instruments	17,275	19,949
Pension and employee benefit obligations	82,369	90,266
Other	4,816	8,386
Total deferred credits and other liabilities	1,530,842	1,506,595
Commitments and contingencies
Capitalization
Long-term debt	1,830,796	1,829,941
Common stock — 200 shares authorized of $1.00 par value; 100 shares outstanding at Sept. 30, 2018 and Dec. 31, 2017, respectively	0	0
Additional paid in capital	1,771,469	1,590,242
Retained earnings	610,655	541,588
Accumulated other comprehensive loss	(1,375)	(1,467)
Total common stockholder’s equity	2,380,749	2,130,363
Total liabilities and equity	$ 6,265,187	$ 5,888,544