CONDENSED CONSOLIDATED BALANCE SHEETS Unaudited - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Utility plant:
Utility plant	$ 2,892,666	$ 2,717,339
Less accumulated depreciation and amortization	(910,742)	(858,062)
Net utility plant	1,981,924	1,859,277
Current assets:
Cash and cash equivalents	28,341	25,492
Receivables:
Customers	46,963	30,305
Regulatory balancing accounts	31,364	30,332
Other	16,438	17,158
Unbilled revenue	38,491	25,228
Materials and supplies at weighted average cost	6,344	6,292
Taxes, prepaid expenses, and other assets	12,544	7,262
Total current assets	180,485	142,069
Other assets:
Regulatory assets	379,884	355,930
Goodwill	2,615	2,615
Other assets	58,196	51,854
Total other assets	440,695	410,399
TOTAL ASSETS	2,603,104	2,411,745
Capitalization:
Common stock, $0.01 par value; 68,000 shares authorized, 48,015 and 47,965 outstanding in 2017 and 2016, respectively	480	480
Additional paid-in capital	335,516	334,856
Retained earnings	351,727	324,135
Total common stockholders’ equity	687,723	659,471
Long-term debt, less current maturities	519,700	531,745
Total capitalization	1,207,423	1,191,216
Current liabilities:
Current maturities of long-term debt	36,015	26,208
Short-term borrowings	195,100	97,100
Accounts payable	89,394	77,813
Regulatory balancing accounts	4,545	4,759
Accrued interest	12,763	5,661
Accrued expenses and other liabilities	42,544	38,689
Total current liabilities	380,361	250,230
Unamortized investment tax credits	1,798	1,798
Deferred income taxes	329,506	298,924
Pension and postretirement benefits other than pensions	227,819	222,691
Regulatory liabilities and other	91,006	83,648
Advances for construction	182,820	182,448
Contributions in aid of construction	182,371	180,790
Commitments and contingencies (Note 10)
TOTAL CAPITALIZATION AND LIABILITIES	$ 2,603,104	$ 2,411,745