CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating activities
Net income	$ 56,287	$ 52,242
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	60,017	58,126
Deferred income taxes	28,691	19,491
Amortization of investment tax credits	(504)	(500)
Allowance for equity funds used during construction	(4,915)	(2,755)
Net derivative (gains)	(356)	(658)
Changes in operating assets and liabilities:
Accounts receivable	7,761	2,566
Accrued unbilled revenues	13,009	11,076
Inventories	(5,172)	(3,382)
Other current assets	11,693	9,486
Accounts payable	(9,910)	(3,755)
Net regulatory assets and liabilities	(35,546)	(6,260)
Other current liabilities	955	9,635
Pension and other employee benefit obligations	(6,882)	(9,273)
Change in other noncurrent assets	(46)	260
Change in other noncurrent liabilities	1,013	1,555
Net cash provided by operating activities	116,095	137,854
Investing activities
Utility capital/construction expenditures	(194,886)	(134,641)
Allowance for equity funds used during construction	4,915	2,754
Other, net	(13)	(249)
Net cash used in investing activities	(189,984)	(132,136)
Financing activities
Repayments of short-term borrowings, net	(60,000)	(28,000)
Proceeds from (repayments of) notes payable to affiliate	30	(80)
Proceeds from Issuance of Long-term Debt	98,625	0
Repayments of long-term debt	(54)	(109)
Capital contributions from parent	68,011	42,481
Dividends paid to parent	(32,331)	(22,943)
Net cash provided by (used in) financing activities	74,281	(8,651)
Net change in cash and cash equivalents	392	(2,933)
Cash and cash equivalents at beginning of period	1,349	4,459
Cash and cash equivalents at end of period	1,741
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(17,313)	(18,366)
Cash received (paid) for income taxes, net	915	(2,127)
Supplemental disclosure of non-cash investing transactions:
Property, plant and equipment additions in accounts payable	$ 28,693	$ 10,347