CONDENSED CONSOLIDATED BALANCE SHEETS Unaudited - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Utility plant:
Utility plant	$ 2,826,187	$ 2,717,339
Less accumulated depreciation and amortization	(897,575)	(858,062)
Net utility plant	1,928,612	1,859,277
Current assets:
Cash and cash equivalents	29,103	25,492
Receivables:
Customers	39,027	30,305
Regulatory balancing accounts	29,071	30,332
Other	17,322	17,158
Unbilled revenue	34,857	25,228
Materials and supplies at weighted average cost	6,518	6,292
Taxes, prepaid expenses, and other assets	14,682	7,262
Total current assets	170,580	142,069
Other assets:
Regulatory assets	375,868	355,930
Goodwill	2,615	2,615
Other assets	55,351	51,854
Total other assets	433,834	410,399
TOTAL ASSETS	2,533,026	2,411,745
Capitalization:
Common stock, $0.01 par value; 68,000 shares authorized, 48,018 and 47,965 outstanding in 2017 and 2016, respectively	480	480
Additional paid-in capital	334,834	334,856
Retained earnings	326,520	324,135
Total common stockholders’ equity	661,834	659,471
Long-term debt, less current maturities	519,875	531,745
Total capitalization	1,181,709	1,191,216
Current liabilities:
Current maturities of long-term debt	36,110	26,208
Short-term borrowings	190,100	97,100
Accounts payable	84,222	77,813
Regulatory balancing accounts	6,743	4,759
Accrued interest	5,842	5,661
Accrued expenses and other liabilities	38,010	38,689
Total current liabilities	361,027	250,230
Unamortized investment tax credits	1,798	1,798
Deferred income taxes	310,936	298,924
Pension and postretirement benefits other than pensions	227,186	222,691
Regulatory liabilities and other	86,821	83,648
Advances for construction	182,394	182,448
Contributions in aid of construction	181,155	180,790
Commitments and contingencies (Note 10)
TOTAL CAPITALIZATION AND LIABILITIES	$ 2,533,026	$ 2,411,745