Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment
Regulated energy	$ 535,978	$ 528,790
Unregulated energy	68,081	67,327
Other	18,086	19,988
Total property, plant and equipment	622,145	616,105
Less: Accumulated depreciation and amortization	(141,189)	(137,784)
Plus: Construction work in progress	16,407	9,383
Net property, plant and equipment	497,363	487,704
Current Assets
Cash and cash equivalents	2,047	2,637
Accounts receivable (less allowance for uncollectible accounts of $1,049 and $1,090, respectively)	68,975	76,605
Accrued revenue	8,290	10,403
Propane inventory, at average cost	7,344	9,726
Other inventory, at average cost	3,009	4,785
Regulatory assets	1,166	1,846
Storage gas prepayments	1,724	5,003
Income taxes receivable	5,601	6,998
Deferred income taxes	1,202	2,712
Prepaid expenses	3,511	5,072
Mark-to-market energy assets	261	1,754
Other current assets	219	219
Total current assets	103,349	127,760
Deferred Charges and Other Assets
Goodwill	4,090	4,090
Other intangible assets, net	3,044	3,127
Investments, at fair value	4,264	3,918
Regulatory assets	77,958	79,256
Receivables and other deferred charges	3,059	3,211
Total deferred charges and other assets	92,415	93,602
Total Assets	693,127	709,066
Stockholders' equity
Common stock, par value $0.4867 per share (authorized 25,000,000 shares)	4,661	4,656
Additional paid-in capital	149,252	149,403
Retained earnings	98,691	91,248
Accumulated other comprehensive loss	(4,460)	(4,527)
Deferred compensation obligation	828	817
Treasury stock	(828)	(817)
Total stockholders' equity	248,144	240,780
Long-term debt, net of current maturities	110,236	110,285
Total capitalization	358,380	351,065
Current Liabilities
Current portion of long-term debt	8,196	8,196
Short-term borrowing	15,656	34,707
Accounts payable	48,721	55,581
Customer deposits and refunds	30,509	30,918
Accrued interest	2,927	1,637
Dividends payable	3,304	3,300
Accrued compensation	4,610	6,932
Regulatory liabilities	7,427	6,653
Mark-to-market energy liabilities	131	1,496
Other accrued liabilities	8,381	8,079
Total current liabilities	129,862	157,499
Deferred Credits and Other Liabilities
Deferred income taxes	119,532	115,624
Deferred investment tax credits	156	171
Regulatory liabilities	3,773	3,564
Environmental liabilities	9,437	9,492
Other pension and benefit costs	26,306	26,808
Accrued asset removal cost--Regulatory liability	37,013	36,584
Other liabilities	8,668	8,259
Total deferred credits and other liabilities	204,885	200,502
Other commitments and contingencies (Note 4 and 5)
Total Capitalization and Liabilities	$ 693,127	$ 709,066