STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating activities
Net income	$ 113,707	$ 75,827
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	101,514	93,171
Demand side management program amortization	1,255	1,255
Deferred income taxes	88,008	36,831
Amortization of investment tax credits	(255)	(245)
Allowance for equity funds used during construction	(9,682)	(6,972)
Net derivative losses	201	201
Changes in operating assets and liabilities:
Accounts receivable	(10,982)	(32,999)
Accrued unbilled revenues	(22,164)	(25,860)
Inventories	(6,257)	(5,558)
Prepayments and other	(672)	(7,046)
Accounts payable	5,777	21,281
Net regulatory assets and liabilities	(11,550)	(11,629)
Other current liabilities	29,426	62,149
Pension and other employee benefit obligations	(2,535)	(18,923)
Change in other noncurrent assets	2,684	(1,580)
Change in other noncurrent liabilities	2,204	(2,221)
Net cash provided by operating activities	280,679	177,682
Investing activities
Utility capital/construction expenditures	(412,976)	(423,435)
Allowance for equity funds used during construction	9,682	6,972
Investments in utility money pool arrangement	(94,000)	(12,000)
Repayments from utility money pool arrangement	91,000	12,000
Net cash used in investing activities	(406,294)	(416,463)
Financing activities
Repayments of short-term borrowings, net	(84,000)	(9,000)
Proceeds from Issuance of Long-term Debt	148,241	94,809
Borrowings under utility money pool arrangement	433,000	565,000
Repayments under utility money pool arrangement	(471,000)	(485,000)
Capital contributions from parent	160,000	124,935
Dividends paid to parent	(60,632)	(51,361)
Net cash provided by financing activities	125,609	239,383
Net change in cash and cash equivalents	(6)	602
Cash and cash equivalents at beginning of period	1,011	482
Cash and cash equivalents at end of period	1,005	1,084
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(41,604)	(41,273)
Cash received (paid) for income taxes, net	26,539	(18,719)
Supplemental disclosure of non-cash investing transactions:
Property, plant and equipment additions in accounts payable	$ 19,538	$ 25,143