Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATIONS:
Net income	$ 56,698	$ 55,549
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	119,566	114,612
Amortization of redemption premiums and expense on debt	2,053	1,971
Deferred income taxes and investment tax credit adjustments - net	16,350	(11,140)
Allowance for equity funds used during construction	(1,728)	(7,380)
Change in certain assets and liabilities:
Accounts receivable	3,638	(11,730)
Inventories	3,416	77
Increase (Decrease) in Accounts Payable	(23,261)	(15,607)
Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities	778	(8,841)
Accrued real estate and personal property taxes	(24,751)	22,177
Accrued interest	347	(253)
Pension and other postretirement benefit expenses	2,721	(32,812)
Short-term and long-term regulatory assets and liabilities	5,707	71,768
Increase (Decrease) in Prepaid Expense and Other Assets	6,758	8,509
Other - net	(3,898)	1,753
Net cash provided by operating activities	150,878	171,635
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(107,610)	(97,132)
Project development costs	(955)	(365)
Cost of removal and regulatory recoverable ARO payments	(6,625)	(11,800)
Other	278	1,053
Net cash used in investing activities	(114,912)	(108,244)
CASH FLOWS FROM FINANCING ACTIVITIES:
Short-term debt borrowings	10,000	75,000
Short-term debt repayments	0	(98,000)
Dividends on common stock	(59,935)	(51,267)
Preferred dividends of subsidiary	(1,607)	(1,607)
Payments for financed capital expenditures	(5,508)	(4,463)
Other	(710)	(191)
Net cash used in financing activities	(57,760)	(80,528)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(21,794)	(17,137)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	11,805	13,544
Supplemental disclosures of cash flow information:
Capital Expenditures Incurred but Not yet Paid	60,618	34,976
Cash paid during the period for:
Income Taxes Paid, Net	21,700	5,000
Interest (net of amount capitalized)	$ 58,542	$ 45,578