CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities
Net income	$ 30,256	$ 34,779
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	48,929	44,539
Deferred income taxes	15,188	20,219
Amortization of Investment Tax Credits	(264)	(264)
Allowance for equity funds used during construction	(1,728)	(3,997)
Loss on Monticello life cycle management/extended power uprate project	0	5,237
Net derivative losses	138	586
Changes in operating assets and liabilities:
Accounts receivable	4,599	7,107
Accrued unbilled revenues	6,072	13,636
Inventories	5,429	7,696
Other current assets	329	6,876
Accounts payable	12,907	8,058
Net regulatory assets and liabilities	1,555	(2,182)
Other current liabilities	589	3,222
Pension and other employee benefit obligations	(6,848)	(4,403)
Change in other noncurrent assets	(393)	(8)
Change in other noncurrent liabilities	555	412
Net cash provided by operating activities	117,313	141,513
Investing activities
Utility capital/construction expenditures	(87,791)	(150,443)
Allowance for equity funds used during construction	1,728	3,997
Other, net	687	(37)
Net cash used in investing activities	(85,376)	(146,483)
Financing activities
Repayments of short-term borrowings, net	(2,000)	(78,000)
Proceeds from Issuance of Long-term Debt	0	98,375
Repayments of long-term debt	(29)	(25)
Contributions from (to) parent	(1,545)	29,638
Dividends paid to parent	(27,850)	(28,272)
Net cash (used in) provided by financing activities	(31,424)	21,716
Net change in cash and cash equivalents	513	16,746
Cash and cash equivalents at beginning of period	1,079	1,285
Cash and cash equivalents at end of period	1,592	18,031
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(15,718)	(13,001)
Cash (paid) received for income taxes, net	(3,336)	6,993
Supplemental disclosure of non-cash investing transactions:
Property, plant and equipment additions in accounts payable	$ 10,220	$ 13