CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net income	$ 46,692	$ 55,991
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization including regulatory items	67,099	61,326
Pension and other postretirement benefit costs, net of contributions	(12,038)	(1,354)
Deferred income taxes and unamortized investment tax credit, net	28,237	12,744
Allowance for equity funds used during construction	(3,469)	(4,573)
Stock compensation expense	1,507	2,608
Other	(45)	130
Non-cash (gain)/loss on derivatives	4,892	425
Cash flows impacted by changes in:
Accounts receivable and accrued unbilled revenues	14,496	4,334
Fuel, materials and supplies	(2,495)	(5,690)
Prepaid expenses, other current assets and deferred charges	(5,813)	(4,833)
Accounts payable and accrued liabilities	(24,621)	(20,237)
Asset retirement obligations	(27)	(1,232)
Interest, taxes accrued and customer deposits	25,457	24,571
Other liabilities and other deferred credits	5,818	(1,834)
Net cash provided by operating activities	145,690	122,376
Investing activities:
Capital expenditures - regulated	(145,886)	(149,778)
Capital expenditures and other investments - non-regulated	(1,828)	(1,140)
Restricted cash		(4,854)
Net cash used in investing activities	(147,714)	(155,772)
Financing activities:
Proceeds from first mortgage bonds, net	60,000
Long-term debt issuance costs	(519)
Proceeds from issuance of common stock, net of issuance costs	4,307	6,465
Net short-term debt borrowings/(repayments)	(27,750)	59,000
Dividends	(34,042)	(33,085)
Other	(217)	(205)
Net cash provided by financing activities	1,779	32,175
Net increase (decrease) in cash and cash equivalents	(245)	(1,221)
Cash and cash equivalents at beginning of period	2,105	3,475
Cash and cash equivalents at end of period	$ 1,860	$ 2,254