STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities
Net income	$ 18,735	$ 12,584
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	31,059	30,724
Demand side management program amortization	418	418
Deferred income taxes	22,166	10,433
Amortization of investment tax credits	(85)	(82)
Allowance for equity funds used during construction	(3,640)	(2,622)
Net derivative losses	66	66
Changes in operating assets and liabilities:
Accounts receivable	12,526	4,777
Accrued unbilled revenues	(2,413)	(7,384)
Inventories	5,131	6,856
Prepayments and other	(15,455)	(10,870)
Accounts payable	9,454	11,987
Net regulatory assets and liabilities	(16,994)	(7,047)
Other current liabilities	3,908	6,556
Pension and other employee benefit obligations	(3,513)	(20,739)
Change in other noncurrent assets	2,951	(2,593)
Change in other noncurrent liabilities	1,758	(2,683)
Net cash provided by operating activities	66,072	30,381
Investing activities
Utility capital/construction expenditures	(137,637)	(106,376)
Allowance for equity funds used during construction	3,640	2,622
Investments in utility money pool arrangement	(10,000)	(12,000)
Repayments from utility money pool arrangement	10,000	12,000
Net cash used in investing activities	(133,997)	(103,754)
Financing activities
(Repayments of) proceeds from short-term borrowings, net	(15,000)	7,000
Borrowings under utility money pool arrangement	231,000	49,000
Repayments under utility money pool arrangement	(169,000)	(29,000)
Capital contributions from parent	40,000	65,000
Dividends paid to parent	(18,082)	(16,773)
Net cash provided by financing activities	68,918	75,227
Net change in cash and cash equivalents	993	1,854
Cash and cash equivalents at beginning of period	1,011	482
Cash and cash equivalents at end of period	2,004	2,336
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(7,570)	(5,171)
Cash (paid) received for income taxes, net	(2,522)	1,015
Supplemental disclosure of non-cash investing transactions:
Property, plant and equipment additions in accounts payable	$ 30,938	$ 31,586