CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
OPERATING ACTIVITIES
Net Income	$ 9,161	$ 5,647
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in earnings of affiliates	(13,928)	(10,510)
Distributions received from affiliates	8,460	6,639
Depreciation	9,080	8,682
Deferred income taxes and investment tax credits	6,378	1,600
Regulatory and other amortization, net	4,071	960
Non-cash employee benefit plan costs	3,295	3,132
Other non-cash expense and (income), net	(2,031)	(744)
Changes in assets and liabilities:
Decrease in accounts receivable and unbilled revenues	8,719	4,030
Decrease in accounts payable	(1,876)	(1,533)
Change in prepaid and accrued income taxes	9,971	8,249
Decrease (increase) in other current assets	354	(1,291)
Decrease in special deposits and restricted cash for power collateral	0	5,370
Employee benefit plan funding	(7,583)	(152)
Decrease in other current liabilities	(2,456)	(2,583)
Increase in other long-term assets and liabilities and other	(147)	(245)
Net cash provided by operating activities	31,468	27,251
INVESTING ACTIVITIES
Construction and plant expenditures	(18,217)	(12,058)
Reimbursements of restricted cash - bond proceeds	10,090	0
Project reimbursement from DOE	398	0
Investments in available-for-sale securities	(558)	(935)
Proceeds from sale of available-for-sale securities	474	796
Other investing activities	(222)	(136)
Net cash used for investing activities	(8,035)	(12,333)
FINANCING ACTIVITIES
Net proceeds from the issuance of common stock	1,124	12,894
Decrease in special deposits for preferred stock mandatory redemption	0	1,000
Retirement of preferred stock subject to mandatory redemption	0	(1,000)
Common and preferred dividends paid	(6,335)	(5,634)
Proceeds from revolving credit facility and other short-term borrowings	16,179	82,388
Repayments under revolving credit facility and other short-term borrowings	(29,874)	(103,130)
Proceeds from long-term debt	40,000	0
Repayment of long-term debt	(20,000)	0
Common stock offering and debt issue costs	(195)	(305)
Reduction in capital lease and other financing activities	(666)	(556)
Net cash provided by (used for) financing activities	233	(14,343)
Net change in cash and cash equivalents	23,666	575
Cash and cash equivalents at beginning of the period	2,676	2,069
Cash and cash equivalents at end of the period	$ 26,342	$ 2,644