Consolidated Statement of Cash Flows (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities:
Net income	$ 34,654	$ 43,076
Adjustments to reconcile net income to cash provided by operations:
Depreciation and amortization	52,304	47,930
Undistributed earnings from equity investments	354	(576)
Non-cash expenses related to qualified defined benefit pension plans	5,491	5,758
Contributions to qualified defined benefit pension plans	(19,245)	(10,000)
Deferred environmental expenditures	(7,018)	(5,153)
Other	(969)	(1,863)
Changes in assets and liabilities:
Receivables	92,840	103,377
Inventories	(3,196)	(8,666)
Taxes accrued	36,585	(17,198)
Accounts payable	(33,369)	(39,985)
Interest accrued	6,139	6,785
Deferred gas costs	370	(22,582)
Deferred tax liabilities	22,908	23,993
Other - net	3,440	(10,372)
Cash provided by operating activities	191,288	114,524
Investing activities:
Capital expenditures	(70,036)	(185,651)
Utility gas reserves	(30,917)	0
Restricted cash	924	34,619
Other	(192)	953
Cash used in investing activities	(100,221)	(150,079)
Financing activities:
Common stock issued (purchased) - net, including common stock expense	1,320	4,129
Long-term debt issued	50,000	0
Long-term debt retired	(10,000)	0
Change in short-term debt	(76,235)	57,875
Cash dividend payments on common stock	(34,807)	(33,063)
Other	1,060	683
Cash used in financing activities	(68,662)	29,624
Increase (decrease) in cash and cash equivalents	22,405	(5,931)
Cash and cash equivalents - beginning of period	3,457	8,432
Cash and cash equivalents - end of period	25,862	2,501
Supplemental disclosure of cash flow information:
Interest paid	24,817	23,796
Income taxes paid	$ 1,522	$ 21,100