Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities
Net Income	$ 14,869	$ 10,727
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,820	5,761
Depreciation and accretion included in other costs	1,476	1,398
Deferred income taxes, net	2,208	5,373
Gain on sale of assets	(8)	(36)
Unrealized (gain) loss on commodity contracts	(214)	60
Unrealized gain on investments	(283)	(317)
Realized gain on sales of investments, net	(69)
Employee benefits	211	437
Share-based compensation	381	345
Other, net	(3)	(7)
Changes in assets and liabilities:
Purchase of investments	(7)	(29)
Accounts receivable and accrued revenue	(8,657)	9,760
Propane inventory, storage gas and other inventory	5,064	5,830
Regulatory assets	852	914
Prepaid expenses and other current assets	1,469	1,452
Accounts payable and other accrued liabilities	1,510	(8,139)
Income taxes receivable	8,899	1,398
Accrued interest	1,185	1,290
Customer deposits and refunds	(2,520)	(409)
Accrued compensation	(2,753)	(2,305)
Regulatory liabilities	5,711	799
Other liabilities	(173)	248
Net cash provided by operating activities	34,968	34,550
Investing Activities
Property, plant and equipment expenditures	(16,217)	(14,744)
Proceeds from sales of assets	34	2,170
Purchase of investments and acquisition	(2,437)	(124)
Environmental expenditures	(20)	(55)
Net cash used in investing activities	(18,640)	(12,753)
Financing Activities
Common stock dividends	(3,176)	(2,989)
Purchase of stock for Dividend Reinvestment Plan	(326)	(327)
Change in cash overdrafts due to outstanding checks	83	(1,550)
Net repayment under line of credit agreements	(13,647)	(17,501)
Repayment of long-term debt	(15)	(20)
Net cash used in financing activities	(17,081)	(22,387)
Net Decrease in Cash and Cash Equivalents	(753)	(590)
Cash and Cash Equivalents-Beginning of Period	3,361	2,637
Cash and Cash Equivalents-End of Period	$ 2,608	$ 2,047