CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net income	$ 12,630	$ 9,804
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization including regulatory items	16,813	20,846
Pension and other postretirement benefit costs, net of contributions	3,423	1,035
Deferred income taxes and unamortized investment tax credit, net	5,243	6,495
Allowance for equity funds used during construction	(526)	(50)
Stock compensation expense	1,351	871
Loss on plant disallowance	2,409
Reverse gain on sale of assets	1,236
Non-cash loss on derivatives	7
Cash flows impacted by changes in:
Accounts receivable and accrued unbilled revenues	(640)	6,795
Fuel, materials and supplies	7,563	46
Prepaid expenses, other current assets and deferred charges	119	(1,281)
Accounts payable and accrued liabilities	(19,497)	(18,254)
Interest, taxes accrued and customer deposits	12,820	10,850
Other liabilities and other deferred credits	1,126	1,970
Net cash provided by operating activities	44,077	39,127
Investing activities:
Capital expenditures - regulated	(37,398)	(30,355)
Capital expenditures and other investments - non-regulated	(362)	(699)
Restricted cash	2,585
Net cash used in investing activities	(35,175)	(31,054)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	2,764	2,230
Net short-term borrowings/(repayments)	(1,000)	10,500
Repayment of first mortgage bonds		(13,200)
Dividends	(10,644)	(10,514)
Other	(227)	(228)
Net cash used in financing activities	(9,107)	(11,212)
Net decrease in cash and cash equivalents	(205)	(3,139)
Cash and cash equivalents at beginning of period	3,375	5,408
Cash and cash equivalents at end of period	$ 3,170	$ 2,269