CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities
Net income	$ 54,477	$ 61,011
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	74,014	67,936
Deferred income taxes	27,769	38,595
Amortization of investment tax credits	(396)	(396)
Allowance for equity funds used during construction	(2,969)	(5,926)
Loss on Monticello life cycle management/extended power uprate project	0	5,237
Net derivative losses	112	338
Changes in operating assets and liabilities:
Accounts receivable	9,394	10,026
Accrued unbilled revenues	8,203	12,657
Inventories	1,290	2,847
Other current assets	7,791	14,471
Accounts payable	11,946	(25,023)
Net regulatory assets and liabilities	(10,256)	(13,962)
Other current liabilities	1,523	5,948
Pension and other employee benefit obligations	(6,256)	(3,931)
Change in other noncurrent assets	(402)	11
Change in other noncurrent liabilities	1,918	595
Net cash provided by operating activities	178,158	170,434
Investing activities
Utility capital/construction expenditures	(138,616)	(171,586)
Allowance for equity funds used during construction	2,969	5,926
Other, net	781	(90)
Net cash used in investing activities	(134,866)	(165,750)
Financing activities
Repayments of short-term borrowings, net	(6,000)	(78,000)
Proceeds from issuance of long-term debt	0	98,038
Repayments of long-term debt	(44)	0
Capital contributions from parent	1,108	25,060
Dividends paid to parent	(38,414)	(40,265)
Net cash (used in) provided by financing activities	(43,350)	4,833
Net change in cash and cash equivalents	(58)	9,517
Cash and cash equivalents at beginning of period	1,079	1,285
Cash and cash equivalents at end of period	1,021	10,802
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(21,692)	(18,647)
Cash (paid) received for income taxes, net	(2,298)	9,662
Supplemental disclosure of non-cash investing transactions:
Property, plant and equipment additions in accounts payable	$ 16,011	$ 13,520