CONDENSED CONSOLIDATED BALANCE SHEETS Unaudited - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Utility plant:
Utility plant	$ 3,094,616	$ 2,970,179
Less accumulated depreciation and amortization	(964,352)	(922,214)
Net utility plant	2,130,264	2,047,965
Current assets:
Cash and cash equivalents	33,668	94,776
Receivables:
Customers	44,700	32,451
Regulatory balancing accounts	33,257	36,783
Other	19,859	16,464
Unbilled revenue	36,192	29,756
Materials and supplies at weighted average cost	6,714	6,463
Taxes, prepaid expenses, and other assets	15,180	11,180
Total current assets	189,570	227,873
Other assets:
Regulatory assets	405,297	401,147
Goodwill	2,615	2,615
Other assets	61,768	60,775
Total other assets	469,680	464,537
TOTAL ASSETS	2,789,514	2,740,375
Capitalization:
Common stock, $0.01 par value; 68,000 shares authorized, 48,070 and 48,012 outstanding in 2018 and 2017, respectively	481	480
Additional paid-in capital	336,238	336,229
Retained earnings	349,213	356,753
Total common stockholders’ equity	685,932	693,462
Long-term debt, less current maturities	414,530	515,793
Total capitalization	1,100,462	1,209,255
Current liabilities:
Current maturities of long-term debt	105,024	15,920
Short-term borrowings	325,100	275,100
Accounts payable	93,032	93,955
Regulatory balancing accounts	56,317	59,303
Accrued interest	5,751	6,122
Accrued expenses and other liabilities	37,076	40,559
Total current liabilities	622,300	490,959
Unamortized investment tax credits	1,724	1,724
Deferred income taxes	196,109	192,946
Pension and postretirement benefits other than pensions	256,431	252,141
Regulatory liabilities and other	238,912	224,127
Advances for construction	185,286	182,502
Contributions in aid of construction	188,290	186,721
Commitments and contingencies (Note 10)
TOTAL CAPITALIZATION AND LIABILITIES	$ 2,789,514	$ 2,740,375