Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment
Regulated energy	$ 585,429	$ 528,790
Unregulated energy	70,218	67,327
Other	20,067	19,988
Total property, plant and equipment	675,714	616,105
Less: Accumulated depreciation and amortization	(155,378)	(137,784)
Plus: Construction work in progress	21,445	9,383
Net property, plant and equipment	541,781	487,704
Current Assets
Cash and cash equivalents	3,361	2,637
Accounts receivable (less allowance for uncollectible accounts of $826 and $1,090, respectively)	53,787	76,605
Accrued revenue	11,688	10,403
Propane inventory, at average cost	7,612	9,726
Other inventory, at average cost	5,841	4,785
Regulatory assets	2,736	1,846
Storage gas prepayments	3,716	5,003
Income taxes receivable	4,703	6,998
Deferred income taxes	791	2,712
Prepaid expenses	6,020	5,072
Mark-to-market energy assets	210	1,754
Other current assets	132	219
Total current assets	100,597	127,760
Deferred Charges and Other Assets
Goodwill	4,090	4,090
Other intangible assets, net	2,798	3,127
Investments, at fair value	4,168	3,918
Regulatory assets	77,408	79,256
Receivables and other deferred charges	2,904	3,211
Total deferred charges and other assets	91,368	93,602
Total Assets	733,746	709,066
Stockholders' equity
Common stock, par value $0.4867 per share (authorized 25,000,000)	4,671	4,656
Additional paid-in capital	150,750	149,403
Retained earnings	106,239	91,248
Accumulated other comprehensive loss	(5,062)	(4,527)
Deferred compensation obligation	982	817
Treasury stock	(982)	(817)
Total stockholders' equity	256,598	240,780
Long-term debt, net of current maturities	101,907	110,285
Total capitalization	358,505	351,065
Current Liabilities
Current portion of long-term debt	8,196	8,196
Short-term borrowing	61,199	34,707
Accounts payable	41,992	55,581
Customer deposits and refunds	29,271	30,918
Accrued interest	1,437	1,637
Dividends payable	3,502	3,300
Accrued compensation	7,435	6,932
Regulatory liabilities	1,577	6,653
Mark-to-market energy liabilities	331	1,496
Other accrued liabilities	7,226	8,079
Total current liabilities	162,166	157,499
Deferred Credits and Other Liabilities
Deferred income taxes	125,205	115,624
Deferred investment tax credits	113	171
Regulatory liabilities	5,454	3,564
Environmental liabilities	9,114	9,492
Other pension and benefit costs	33,535	33,798
Accrued asset removal cost-Regulatory liability	38,096	36,584
Other liabilities	1,558	1,269
Total deferred credits and other liabilities	213,075	200,502
Other commitments and contingencies (Note 18 and 19)
Total Capitalization and Liabilities	$ 733,746	$ 709,066