BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 407	$ 10,871
Accounts receivable, net	102,379	79,581
Accounts receivable from affiliates	4,764	1,297
Investments Receivable in Utility Money Pool Arrangement	0	65,000
Accrued unbilled revenues	127,475	129,804
Inventories	32,518	40,433
Regulatory assets	26,093	31,538
Derivative instruments	38,549	15,882
Prepaid taxes	15,710	15,025
Prepayments and other	10,219	10,341
Total current assets	358,114	399,772
Property, plant and equipment, net	5,434,187	5,095,609
Other assets
Regulatory assets	360,902	362,943
Derivative instruments	17,374	18,954
Other	3,710	11,266
Total other assets	381,986	393,163
Total assets	6,174,287	5,888,544
Current liabilities
Short-term debt	132,000	0
Borrowings Payable Under Utility Money Pool Arrangement	100,000	0
Accounts payable	184,825	211,756
Accounts payable to affiliates	15,036	22,577
Regulatory liabilities	123,303	68,835
Taxes accrued	51,965	35,243
Accrued interest	23,413	23,275
Dividends payable	30,697	26,753
Derivative instruments	3,565	3,565
Other	26,019	29,641
Total current liabilities	690,823	421,645
Deferred credits and other liabilities
Deferred income taxes	577,492	574,906
Regulatory liabilities	781,917	784,564
Asset retirement obligations	29,279	28,524
Derivative instruments	18,166	19,949
Pension and employee benefit obligations	82,326	90,266
Other	4,630	8,386
Total deferred credits and other liabilities	1,493,810	1,506,595
Commitments and contingencies
Capitalization
Long-term debt	1,830,508	1,829,941
Common stock — 200 shares authorized of $1.00 par value; 100 shares outstanding at June 30, 2018 and Dec. 31, 2017, respectively	0	0
Additional paid in capital	1,591,366	1,590,242
Retained earnings	569,186	541,588
Accumulated other comprehensive loss	(1,406)	(1,467)
Total common stockholder’s equity	2,159,146	2,130,363
Total liabilities and equity	$ 6,174,287	$ 5,888,544