BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 1,000	$ 844
Accounts receivable, net	73,840	74,190
Accounts receivable from affiliates	2,863	949
Accrued unbilled revenues	118,991	119,418
Inventories	31,301	38,505
Regulatory assets	49,409	38,721
Derivative instruments	4,351	5,114
Prepaid taxes	31,316	21,779
Prepayments and other	7,974	7,855
Total current assets	321,045	307,375
Property, plant and equipment, net	4,786,550	4,695,819
Other assets
Regulatory assets	331,017	346,683
Derivative instruments	21,323	22,113
Other	7,142	7,477
Total other assets	359,482	376,273
Total assets	5,467,077	5,379,467
Current liabilities
Short-term debt	111,000	50,000
Accounts payable	159,312	176,157
Accounts payable to affiliates	17,477	14,414
Regulatory liabilities	40,740	41,577
Taxes accrued	31,519	39,742
Accrued interest	25,693	19,162
Dividends payable	26,715	30,870
Derivative instruments	3,565	3,565
Other	24,980	29,703
Total current liabilities	441,001	405,190
Deferred credits and other liabilities
Deferred income taxes	1,020,256	989,137
Regulatory liabilities	232,931	233,454
Asset retirement obligations	29,039	28,663
Derivative instruments	22,622	23,513
Pension and employee benefit obligations	85,699	107,872
Other	24,311	24,084
Total deferred credits and other liabilities	1,414,858	1,406,723
Commitments and contingencies
Capitalization
Long-term debt	1,636,158	1,635,858
Common stock — 200 shares authorized of $1.00 par value; 100 shares outstanding at March 31, 2017 and Dec. 31, 2016, respectively	0	0
Additional paid in capital	1,491,223	1,446,223
Retained earnings	485,103	486,763
Accumulated other comprehensive loss	(1,266)	(1,290)
Total common stockholder’s equity	1,975,060	1,931,696
Total liabilities and equity	$ 5,467,077	$ 5,379,467