CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities
Net income	$ 34,779	$ 36,257
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	44,539	39,754
Deferred income taxes	20,219	16,877
Amortization of investment tax credits	(264)	(337)
Allowance for equity funds used during construction	(3,997)	(3,339)
Loss on Monticello life cycle management/extended power uprate project	5,237	0
Net derivative losses	586	108
Changes in operating assets and liabilities:
Accounts receivable	7,107	2,105
Accrued unbilled revenues	13,636	10,460
Inventories	7,696	2,672
Other current assets	6,876	3,680
Accounts payable	8,058	(3,981)
Net regulatory assets and liabilities	(2,182)	(23,547)
Other current liabilities	3,222	(22)
Pension and other employee benefit obligations	(4,403)	(7,378)
Change in other noncurrent assets	(8)	101
Change in other noncurrent liabilities	412	872
Net cash provided by operating activities	141,513	74,282
Investing activities
Utility capital/construction expenditures	(150,443)	(124,624)
Allowance for equity funds used during construction	3,997	3,339
Other, net	(37)	8
Net cash used in investing activities	(146,483)	(121,277)
Financing activities
Proceeds from short-term borrowings, net	(78,000)	(57,000)
Proceeds from notes payable to affiliate	0	30
Proceeds from Issuance of Long-term Debt	98,375	98,926
Repayments of long-term debt	(25)	(36)
Capital contributions from parent	29,638	20,479
Dividends paid to parent	(28,272)	(16,089)
Net cash provided by financing activities	21,716	46,310
Net change in cash and cash equivalents	16,746	(685)
Cash and cash equivalents at beginning of period	1,285	1,349
Cash and cash equivalents at end of period	18,031	664
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(13,001)	(11,516)
Cash received (paid) for income taxes, net	6,993	(359)
Supplemental disclosure of non-cash investing transactions:
Property, plant and equipment additions in accounts payable	$ 13	$ 16,844