CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities:
Net income	$ 48,283	$ 46,054
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization including regulatory items	53,048	55,043
Pension and other postretirement benefit costs, net of contributions	(5,458)	1,486
Deferred income taxes and unamortized investment tax credit, net	21,579	26,906
Allowance for equity funds used during construction	(2,521)	(395)
Stock compensation expense	2,334	1,893
Loss on plant disallowance	2,409
Regulatory reversal of gain on sale of assets	1,236
Non-cash loss on derivatives	169	3,074
Other		(16)
Cash flows impacted by changes in:
Accounts receivable and accrued unbilled revenues	(5,877)	496
Fuel, materials and supplies	6,652	1,300
Prepaid expenses, other current assets and deferred charges	533	(8,953)
Accounts payable and accrued liabilities	(21,708)	(14,437)
Asset retirement obligations	(363)
Interest, taxes accrued and customer deposits	22,170	19,614
Other liabilities and other deferred credits	(4,845)	4,001
Net cash provided by operating activities	117,641	136,066
Investing activities:
Capital expenditures - regulated	(107,074)	(99,036)
Capital expenditures and other investments - non-regulated	(1,290)	(2,349)
Decrease in restricted cash	2,585
Net cash used in investing activities	(105,779)	(101,385)
Financing activities:
Proceeds from first mortgage bonds, net	150,000	88,000
Long-term debt issuance costs	(1,607)	(1,066)
Proceeds from issuance of common stock, net of issuance costs	7,391	6,522
Repayment of first mortgage bonds		(88,029)
Net short-term debt repayments	(24,000)	(10,000)
Redemption of senior notes	(98,000)
Dividends	(32,048)	(31,665)
Other	(590)	(680)
Net cash provided by / (used in) financing activities	1,146	(36,918)
Net increase (decrease) in cash and cash equivalents	13,008	(2,237)
Cash and cash equivalents at beginning of period	3,375	5,408
Cash and cash equivalents at end of period	$ 16,383	$ 3,171