CONDENSED CONSOLIDATED BALANCE SHEETS Unaudited - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Utility plant:
Utility plant	$ 3,411,219	$ 3,229,446
Less accumulated depreciation and amortization	(1,067,965)	(996,723)
Net utility plant	2,343,254	2,232,723
Current assets:
Cash and cash equivalents	51,257	47,176
Receivables:
Customers	45,624	30,037
Regulatory balancing accounts	33,437	42,394
Other	16,977	17,101
Unbilled revenue	42,562	33,427
Materials and supplies at weighted average cost	7,804	6,586
Taxes, prepaid expenses, and other assets	14,395	11,981
Total current assets	212,056	188,702
Other assets:
Regulatory assets	382,484	353,569
Goodwill	2,615	2,615
Other assets	82,845	60,095
Total other assets	467,944	416,279
TOTAL ASSETS	3,023,254	2,837,704
Capitalization:
Common stock, $0.01 par value; 68,000 shares authorized, 48,145 and 48,065 outstanding in 2019 and 2018, respectively	481	481
Additional paid-in capital	341,988	337,623
Retained earnings	415,326	392,053
Total common stockholders’ equity	757,795	730,157
Long-term debt, net	807,478	710,027
Total capitalization	1,565,273	1,440,184
Current liabilities:
Current maturities of long-term debt, net	5,280	104,911
Short-term borrowings	155,100	65,100
Accounts payable	108,593	95,580
Regulatory balancing accounts	6,887	12,213
Accrued interest	14,410	5,674
Accrued expenses and other liabilities	43,674	37,688
Total current liabilities	333,944	321,166
Unamortized investment tax credits	1,649	1,649
Deferred income taxes	229,237	213,033
Pension and postretirement benefits other than pensions	203,557	193,538
Regulatory liabilities and other	260,812	256,522
Advances for construction	190,272	186,342
Contributions in aid of construction	238,510	225,270
Commitments and contingencies (Note 10)
TOTAL CAPITALIZATION AND LIABILITIES	$ 3,023,254	$ 2,837,704