Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment
Regulated energy	$ 779,394	$ 766,855
Unregulated energy	84,386	84,773
Other	19,459	18,497
Total property, plant and equipment	883,239	870,125
Less: Accumulated depreciation and amortization	(198,181)	(193,369)
Plus: Construction work in progress	24,137	13,006
Net property, plant and equipment	709,195	689,762
Current Assets
Cash and cash equivalents	16,170	4,574
Accounts receivable (less allowance for uncollectible accounts of $1,274 and $1,120, respectively)	62,062	53,300
Accrued revenue	12,869	13,617
Propane inventory, at average cost	4,550	7,250
Other inventory, at average cost	4,411	3,699
Storage gas prepayments	910	4,258
Prepaid expenses	4,510	6,652
Income taxes receivable	0	18,806
Mark-to-market energy assets	46	1,055
Regulatory assets	7,472	8,967
Other current assets	294	195
Total current assets	113,294	122,373
Deferred Charges and Other Assets
Investments, at fair value	3,770	3,678
Regulatory assets	78,113	78,136
Goodwill	4,952	4,952
Other intangible assets, net	2,316	2,404
Receivables and other deferred charges	2,067	3,164
Total deferred charges and other assets	91,218	92,334
Total Assets	913,707	904,469
Stockholders' equity
Common stock, par value $0.4867 per share (authorized 25,000,000 shares)	7,119	7,100
Additional paid-in capital	156,749	156,581
Retained earnings	159,446	142,317
Accumulated other comprehensive loss	(5,568)	(5,676)
Deferred compensation obligation	1,715	1,258
Treasury stock	(1,715)	(1,258)
Total stockholders' equity	317,746	300,322
Long-term debt, net of current maturities	158,083	158,486
Total capitalization	475,829	458,808
Current Liabilities
Current portion of long-term debt	9,116	9,109
Short-term borrowing	66,772	88,231
Accounts payable	46,284	44,610
Accrued compensation	4,845	10,076
Accrued interest	3,109	1,352
Dividends payable	3,950	3,939
Accrued Income Taxes, Current	2,946	0
Deferred Tax Liabilities, Net, Current	586	832
Mark-to-market energy liabilities	20	1,018
Regulatory liabilities	18,621	3,268
Customer deposits and refunds	22,307	25,197
Other accrued liabilities	7,797	6,603
Total current liabilities	186,353	194,235
Deferred Credits and Other Liabilities
Deferred income taxes	160,055	160,232
Regulatory liabilities	43,518	43,419
Environmental liabilities	9,147	8,923
Other pension and benefit costs	34,798	35,027
Deferred investment credits and Other liabilities	4,007	3,825
Total deferred credits and other liabilities	251,525	251,426
Other commitments and contingencies (Note 6)
Total Capitalization and Liabilities	$ 913,707	$ 904,469