STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities
Net income	$ 22,523	$ 20,247
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	40,660	36,310
Demand side management program amortization	418	418
Deferred income taxes	25,751	3,617
Amortization of Investment Tax Credits	(53)	(85)
Allowance for equity funds used during construction	(2,337)	(1,705)
Net derivative losses	67	66
Changes in operating assets and liabilities:
Accounts receivable	(2,415)	(12,719)
Accrued unbilled revenues	1,352	26,906
Inventories	6,275	11,482
Prepayments and other	(12,428)	(12,485)
Accounts payable	(8,684)	(21,160)
Net regulatory assets and liabilities	8,361	29,566
Other current liabilities	2,289	12,521
Pension and other employee benefit obligations	(17,201)	(10,954)
Change in other noncurrent assets	(653)	301
Change in other noncurrent liabilities	427	378
Net cash provided by operating activities	64,352	82,704
Investing activities
Utility capital/construction expenditures	(135,720)	(126,622)
Allowance for equity funds used during construction	2,337	1,705
Investments in utility money pool arrangement	0	(9,000)
Repayments from utility money pool arrangement	0	9,000
Net cash used in investing activities	(133,383)	(124,917)
Financing activities
Proceeds from short-term borrowings, net	65,000	86,000
Borrowings under utility money pool arrangement	168,000	41,000
Repayments under utility money pool arrangement	(168,000)	(57,000)
Capital contributions from parent	16,225	0
Dividends paid to parent	(12,538)	(27,828)
Net cash provided by financing activities	68,687	42,172
Net change in cash and cash equivalents	(344)	(41)
Cash and cash equivalents at beginning of period	834
Cash and cash equivalents at end of period	490
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(8,017)	(8,870)
Cash received (paid) for income taxes, net	405	(19,004)
Supplemental disclosure of non-cash investing transactions:
Property, plant and equipment additions in accounts payable	$ 34,913	$ 28,426