CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating activities
Net income	$ 20,620	$ 23,121
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	34,680	34,303
Deferred income taxes	14,638	14,494
Amortization of investment tax credits	(312)	(307)
Allowance for equity funds used during construction	(1,764)	(411)
Net derivative losses	63	63
Changes in operating assets and liabilities:
Accounts receivable	(9,458)	4,029
Accrued unbilled revenues	9,625	14,515
Inventories	7,696	5,804
Other current assets	(712)	1,713
Accounts payable	1,860	(21,340)
Net regulatory assets and liabilities	4,479	246
Other current liabilities	588	2,944
Pension and other employee benefit obligations	(11,730)	(6,602)
Change in other noncurrent assets	(228)	(59)
Change in other noncurrent liabilities	582	(930)
Net cash provided by operating activities	70,627	71,583
Investing activities
Utility capital/construction expenditures	(72,230)	(58,219)
Allowance for equity funds used during construction	1,764	411
Other, net	1,105	(43)
Net cash used in investing activities	(69,361)	(57,851)
Financing activities
Proceeds from short-term borrowings, net	13,000	35,000
Proceeds from notes payable to affiliate	50	111,300
Repayments of notes payable to affiliate	0	(148,300)
Repayments of long-term debt	(32)	(30)
Capital contributions from parent	2,162	0
Dividends paid to parent	(16,225)	(16,728)
Net cash used in financing activities	(1,045)	(18,758)
Net change in cash and cash equivalents	221	(5,026)
Cash and cash equivalents at beginning of period	1,571	6,445
Cash and cash equivalents at end of period	1,792	1,419
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(11,302)	(11,514)
Cash (paid) received for income taxes, net	(706)	441
Supplemental disclosure of non-cash investing transactions:
Property, plant and equipment additions in accounts payable	$ 5,748	$ 1,094