CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities
Net income	$ 17,631	$ 22,267
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	24,829	21,682
Deferred income taxes	5,284	8,241
Amortization of Investment Tax Credits	(132)	(132)
Allowance for equity funds used during construction	(810)	(2,219)
Loss on Monticello life cycle management/extended power uprate project	0	5,237
Net derivative losses	200	554
Changes in operating assets and liabilities:
Accounts receivable	(2,797)	(5,496)
Accrued unbilled revenues	7,326	10,428
Inventories	6,717	9,830
Other current assets	6,348	11,335
Accounts payable	2,325	(11,851)
Net regulatory assets and liabilities	1,856	(1,404)
Other current liabilities	3,492	1,289
Pension and other employee benefit obligations	(7,264)	(4,915)
Change in other noncurrent assets	(319)	(4)
Change in other noncurrent liabilities	798	535
Net cash provided by operating activities	65,484	65,377
Investing activities
Utility capital/construction expenditures	(44,655)	(79,926)
Allowance for equity funds used during construction	810	2,219
Other, net	292	(90)
Net cash used in investing activities	(43,553)	(77,797)
Financing activities
(Repayments of) proceeds from short-term borrowings, net	(5,000)	2,000
Repayments of long-term debt	(14)	(128)
Capital contributions (to) from parent	(1,545)	25,210
Dividends paid to parent	(15,322)	(14,957)
Net cash (used in) provided by financing activities	(21,881)	12,125
Net change in cash and cash equivalents	50	(295)
Cash and cash equivalents at beginning of period	1,079	1,285
Cash and cash equivalents at end of period	1,129	990
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(6,305)	(5,791)
Cash (paid) received for income taxes, net	(2,424)	625
Supplemental disclosure of non-cash investing transactions:
Property, plant and equipment additions in accounts payable	$ 9,586	$ 14,550