Unaudited Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATIONS:
Net income	$ 57,477	$ 16,944
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	109,225	98,667
Amortization (deferral) of regulatory assets	3,957	(7,147)
Amortization of debt premium	78	528
Deferred income taxes and investment tax credit adjustments - net	18,575	8,401
Gain (Loss) on Early Extinguishment of Debt	0	19,323
Allowance for equity funds used during construction	(13,166)	(6,160)
Change in certain assets and liabilities:
Accounts receivable	(21,283)	6,798
Fuel, materials and supplies	17,508	(20,817)
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable	(6,005)	0
Income taxes receivable	(5,885)	(8,174)
Accounts payable and accrued expenses	2,925	6,660
Accrued real estate and personal property taxes	(127)	(6)
Accrued interest	1,665	(6,154)
Pension and other postretirement benefit expenses	(21,019)	(28,159)
Short-term and long-term regulatory assets and liabilities	(16,407)	10,340
Prepaids and other current assets	(4,889)	(7,889)
Other - net	6,995	192
Net cash provided by operating activities	129,624	83,347
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures - utility	(425,587)	(286,261)
Project development costs	(493)	(6,503)
Cost of removal, net of salvage	(8,417)	(6,205)
Other	(1,463)	29
Net cash used in investing activities	(435,960)	(298,940)
CASH FLOWS FROM FINANCING ACTIVITIES:
Short-term debt borrowings	223,000	132,000
Short-term debt repayments	(389,850)	(77,000)
Proceeds from Debt, Net of Issuance Costs	347,662	404,712
Repayments of Long-term Debt	0	384,324
Retirement of long-term debt, including make-whole provision	(52,278)	(37,564)
Issuance of common stock	134,276	214,366
Proceeds from Contributed Capital	78,738
Proceeds from Contributions from Parent		0
Preferred dividends of subsidiary	(1,607)	(1,607)
Deferred financing costs paid	(3,809)	(4,111)
Retention payments on capital expenditures	(6,693)	(718)
Other	(154)	(368)
Net cash provided by financing activities	329,285	245,386
Net change in cash and cash equivalents	22,949	29,793
Cash and cash equivalents at beginning of period	21,521	26,933
Cash and cash equivalents at end of period	44,470	56,726
Cash paid during the period for:
Interest (net of amount capitalized)	41,773	57,191
Income taxes	15,000
Non-cash investing activities:
Accruals for capital expenditures	$ 42,382	$ 57,829