CONDENSED CONSOLIDATED BALANCE SHEETS Unaudited - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Utility plant:
Utility plant	$ 3,346,165	$ 3,229,446
Less accumulated depreciation and amortization	(1,043,960)	(996,723)
Net utility plant	2,302,205	2,232,723
Current assets:
Cash and cash equivalents	54,560	47,176
Receivables:
Customers	43,345	30,037
Regulatory balancing accounts	33,466	42,394
Other	17,616	17,101
Unbilled revenue	32,934	33,427
Materials and supplies at weighted average cost	6,989	6,586
Taxes, prepaid expenses, and other assets	17,120	11,981
Total current assets	206,030	188,702
Other assets:
Regulatory assets	373,619	353,569
Goodwill	2,615	2,615
Other assets	80,126	60,095
Total other assets	456,360	416,279
TOTAL ASSETS	2,964,595	2,837,704
Capitalization:
Common stock, $0.01 par value; 68,000 shares authorized, 48,140 and 48,065 outstanding in 2019 and 2018, respectively	481	481
Additional paid-in capital	340,274	337,623
Retained earnings	382,409	392,053
Total common stockholders’ equity	723,164	730,157
Long-term debt, net	807,693	710,027
Total capitalization	1,530,857	1,440,184
Current liabilities:
Current maturities of long-term debt, net	5,312	104,911
Short-term borrowings	165,100	65,100
Accounts payable	97,376	95,580
Regulatory balancing accounts	17,855	12,213
Accrued interest	6,311	5,674
Accrued expenses and other liabilities	39,435	37,688
Total current liabilities	331,389	321,166
Unamortized investment tax credits	1,649	1,649
Deferred income taxes	216,880	213,033
Pension and postretirement benefits other than pensions	201,476	193,538
Regulatory liabilities and other	264,027	256,522
Advances for construction	189,642	186,342
Contributions in aid of construction	228,675	225,270
Commitments and contingencies (Note 10)
TOTAL CAPITALIZATION AND LIABILITIES	$ 2,964,595	$ 2,837,704