CONDENSED CONSOLIDATED BALANCE SHEETS Unaudited - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Utility plant:
Utility plant	$ 2,766,232	$ 2,717,339
Less accumulated depreciation and amortization	(878,227)	(858,062)
Net utility plant	1,888,005	1,859,277
Current assets:
Cash and cash equivalents	11,990	25,492
Receivables:
Customers	24,685	30,305
Regulatory balancing accounts	30,661	30,332
Other	17,394	17,158
Unbilled revenue	24,303	25,228
Materials and supplies at weighted average cost	6,405	6,292
Taxes, prepaid expenses, and other assets	12,767	7,262
Total current assets	128,205	142,069
Other assets:
Regulatory assets	367,476	355,930
Goodwill	2,615	2,615
Other assets	53,997	51,854
Total other assets	424,088	410,399
TOTAL ASSETS	2,440,298	2,411,745
Capitalization:
Common stock, $0.01 par value; 68,000 shares authorized, 48,022 and 47,965 outstanding in 2017 and 2016, respectively	480	480
Additional paid-in capital	334,220	334,856
Retained earnings	316,633	324,135
Total common stockholders’ equity	651,333	659,471
Long-term debt, less current maturities	521,715	531,745
Total capitalization	1,173,048	1,191,216
Current liabilities:
Current maturities of long-term debt	36,139	26,208
Short-term borrowings	130,100	97,100
Accounts payable	69,276	77,813
Regulatory balancing accounts	8,197	4,759
Accrued interest	12,583	5,661
Accrued expenses and other liabilities	37,078	38,689
Total current liabilities	293,373	250,230
Unamortized investment tax credits	1,798	1,798
Deferred income taxes	299,464	298,924
Pension and postretirement benefits other than pensions	224,851	222,691
Regulatory liabilities and other	84,318	83,648
Advances for construction	182,815	182,448
Contributions in aid of construction	180,631	180,790
Commitments and contingencies (Note 10)
TOTAL CAPITALIZATION AND LIABILITIES	$ 2,440,298	$ 2,411,745