Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash Flows from Operating Activities
Net Income (Loss)	$ 23,064	$ (10,113)
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Net (Gain) Loss from Sale of Discontinued Operations	(210)	3,544
Net (Income) Loss from Discontinued Operations	(116)	23,645
Depreciation and Amortization	29,755	29,683
Asset Impairment Charge		432
Deferred Tax Credits	(955)	(1,045)
Deferred Income Taxes	9,882	3,180
Change in Deferred Debits and Other Assets	7,519	9,960
Discretionary Contribution to Pension Plan	(10,000)	(10,000)
Change in Noncurrent Liabilities and Deferred Credits	4,971	6,995
Allowance for Equity-Other Funds Used During Construction	(567)	(378)
Change in Derivatives Net of Regulatory Deferral	486	748
Stock Compensation Expense - Equity Awards	786	612
Other-Net	867	3,133
Cash (Used for) Provided by Current Assets and Current Liabilities:
Change in Receivables	(10,126)	(7,551)
Change in Inventories	(4,075)	(866)
Change in Other Current Assets	(783)	(2,598)
Change in Payables and Other Current Liabilities	(1,362)	5,028
Change in Interest and Income Taxes Receivable/Payable	(313)	(8,832)
Net Cash Provided by Continuing Operations	48,823	45,577
Net Cash Used in Discontinued Operations	(1,971)	(60)
Net Cash Provided by Operating Activities	46,852	45,517
Cash Flows from Investing Activities
Capital Expenditures	(51,153)	(64,989)
Net Proceeds from Disposal of Noncurrent Assets	1,603	2,223
Net Increase in Other Investments	(25)	(268)
Net Cash Used in Investing Activities - Continuing Operations	(49,575)	(63,034)
Net Proceeds from Sale of Discontinued Operations	12,842	24,278
Net Cash Provided by (Used in) Investing Activities - Discontinued Operations	193	(12,822)
Net Cash Used in Investing Activities	(36,540)	(51,578)
Cash Flows from Financing Activities
Change in Checks Written in Excess of Cash		6,419
Net Short-Term Borrowings	1,117	11,274
Proceeds from Issuance of Common Stock	1,462
Common Stock Issuance Expenses		(86)
Payments for Retirement of Capital Stock	(15,723)	(110)
Proceeds from Issuance of Long-Term Debt	40,900
Short-Term and Long-Term Debt Issuance Expenses	(52)	(10)
Payments for Retirement of Long-Term Debt	(25,222)	(81)
Dividends Paid and Other Distributions	(22,097)	(21,980)
Net Cash Used in Financing Activities - Continuing Operations	(19,615)	(4,574)
Net Cash Used in Financing Activities - Discontinued Operations		(3,344)
Net Cash Used in Financing Activities	(19,615)	(7,918)
Net Change in Cash and Cash Equivalents - Discontinued Operations	(784)	(2,015)
Net Change in Cash and Cash Equivalents	(10,087)	(15,994)
Cash and Cash Equivalents at Beginning of Period	52,362	15,994
Cash and Cash Equivalents at End of Period	$ 42,275