CONDENSED CONSOLIDATED BALANCE SHEETS Unaudited - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Utility plant:
Utility plant	$ 3,169,726	$ 2,970,179
Less accumulated depreciation and amortization	(983,984)	(922,214)
Net utility plant	2,185,742	2,047,965
Current assets:
Cash and cash equivalents	66,421	94,776
Receivables:
Customers	50,785	32,451
Regulatory balancing accounts	37,973	36,783
Other	20,903	16,464
Unbilled revenue	40,318	29,756
Materials and supplies at weighted average cost	6,563	6,463
Taxes, prepaid expenses, and other assets	12,576	11,180
Total current assets	235,539	227,873
Other assets:
Regulatory assets	388,300	401,147
Goodwill	2,615	2,615
Other assets	64,666	60,775
Total other assets	455,581	464,537
TOTAL ASSETS	2,876,862	2,740,375
Capitalization:
Common stock, $0.01 par value; 68,000 shares authorized, 48,068 and 48,012 outstanding in 2018 and 2017, respectively	481	480
Additional paid-in capital	336,960	336,229
Retained earnings	374,593	356,753
Total common stockholders’ equity	712,034	693,462
Long-term debt, less current maturities	714,310	515,793
Total capitalization	1,426,344	1,209,255
Current liabilities:
Current maturities of long-term debt	104,812	15,920
Short-term borrowings	75,100	275,100
Accounts payable	102,938	93,955
Regulatory balancing accounts	43,300	59,303
Accrued interest	13,111	6,122
Accrued expenses and other liabilities	42,629	40,559
Total current liabilities	381,890	490,959
Unamortized investment tax credits	1,724	1,724
Deferred income taxes	199,143	192,946
Pension and postretirement benefits other than pensions	235,501	252,141
Regulatory liabilities and other	255,569	224,127
Advances for construction	186,897	182,502
Contributions in aid of construction	189,794	186,721
Commitments and contingencies (Note 10)
TOTAL CAPITALIZATION AND LIABILITIES	$ 2,876,862	$ 2,740,375