Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Net income	$ 14,009	$ 14,637
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization including regulatory items	19,967	23,056
Pension and other postretirement benefit costs, net of contributions	3,164	1,704
Deferred income taxes and unamortized investment tax credit, net	8,640	7,203
Allowance for equity funds used during construction	(1,704)	(978)
Stock compensation expense	2,107	651
Non-cash (gain)/loss on derivatives	909	772
Other	103
Cash flows impacted by changes in:
Accounts receivable and accrued unbilled revenues	6,843	12,475
Fuel, materials and supplies	2,601	1,632
Prepaid expenses, other current assets and deferred charges	(2,241)	2,984
Accounts payable and accrued liabilities	(22,969)	(28,343)
Asset retirement obligations	(40)
Interest, taxes accrued and customer deposits	13,999	15,159
Other liabilities and other deferred credits	5,987	3,800
Net cash provided by operating activities	51,375	54,752
Investing activities:
Capital expenditures - regulated	(35,359)	(52,954)
Capital expenditures and other investments - non-regulated	(417)	(520)
Restricted cash	1
Net cash used in investing activities	(35,775)	(53,474)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	1,809	1,664
Net short-term borrowings	(6,000)	9,000
Dividends	(11,413)	(11,318)
Other	(77)	(68)
Net cash used in financing activities	(15,681)	(722)
Net increase / (decrease) in cash and cash equivalents	(81)	556
Cash and cash equivalents at beginning of period	1,753	2,105
Cash and cash equivalents at end of period	$ 1,672	$ 2,661