BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 3,912	$ 10,871
Accounts receivable, net	88,537	79,581
Accounts receivable from affiliates	3,500	1,297
Investments Receivable in Utility Money Pool Arrangement	0	65,000
Accrued unbilled revenues	117,692	129,804
Inventories	34,415	40,433
Regulatory assets	32,265	31,538
Derivative instruments	8,502	15,882
Prepaid taxes	15,199	15,025
Prepayments and other	8,808	10,341
Total current assets	312,830	399,772
Property, plant and equipment, net	5,157,550	5,095,609
Other assets
Regulatory assets	355,379	362,943
Derivative instruments	18,164	18,954
Other	7,596	11,266
Total other assets	381,139	393,163
Total assets	5,851,519	5,888,544
Current liabilities
Short-term debt	10,000	0
Accounts payable	168,786	211,756
Accounts payable to affiliates	12,041	22,577
Regulatory liabilities	81,171	68,835
Taxes accrued	40,199	35,243
Accrued interest	20,271	23,275
Dividends payable	33,255	26,753
Derivative instruments	3,565	3,565
Other	21,889	29,641
Total current liabilities	391,177	421,645
Deferred credits and other liabilities
Deferred income taxes	576,692	574,906
Regulatory liabilities	787,943	784,564
Asset retirement obligations	28,899	28,524
Derivative instruments	19,057	19,949
Pension and employee benefit obligations	82,354	90,266
Other	4,936	8,386
Total deferred credits and other liabilities	1,499,881	1,506,595
Commitments and contingencies
Capitalization
Long-term debt	1,830,223	1,829,941
Common stock — 200 shares authorized of $1.00 par value; 100 shares outstanding at March 31, 2018 and Dec. 31, 2017, respectively	0	0
Additional paid in capital	1,590,242	1,590,242
Retained earnings	541,432	541,588
Accumulated other comprehensive loss	(1,436)	(1,467)
Total common stockholder’s equity	2,130,238	2,130,363
Total liabilities and equity	$ 5,851,519	$ 5,888,544