Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment
Regulated energy	$ 697,725	$ 691,522
Unregulated energy	76,938	76,267
Other	21,129	21,002
Total property, plant and equipment	795,792	788,791
Less: Accumulated depreciation and amortization	(179,918)	(174,148)
Plus: Construction work in progress	27,228	16,603
Net property, plant and equipment	643,102	631,246
Current Assets
Cash and cash equivalents	4,791	3,356
Accounts receivable (less allowance for uncollectible accounts of $1,976 and $1,635, respectively)	80,313	75,293
Accrued revenue	12,536	13,910
Propane inventory, at average cost	6,088	10,456
Other inventory, at average cost	3,728	4,880
Storage gas prepayments	1,323	4,318
Prepaid expenses	4,890	6,910
Income taxes receivable	0	2,609
Mark-to-market energy assets	0	385
Regulatory assets	4,342	2,436
Deferred income taxes	1,723	1,696
Other current assets	198	160
Total current assets	119,932	126,409
Deferred Charges and Other Assets
Investments, at fair value	2,951	3,098
Regulatory assets	66,395	66,584
Goodwill	4,625	4,354
Other intangible assets, net	2,875	2,975
Receivables and other deferred charges	2,681	2,856
Total deferred charges and other assets	79,527	79,867
Total Assets	842,561	837,522
Stockholders' equity
Common stock, par value $0.4867 per share (authorized 25,000,000 shares)	4,715	4,691
Additional paid-in capital	152,862	152,341
Retained earnings	138,176	124,274
Accumulated other comprehensive loss	(2,502)	(2,533)
Deferred compensation obligation	1,138	1,124
Treasury stock	(1,138)	(1,124)
Total stockholders' equity	293,251	278,773
Long-term debt, net of current maturities	117,195	117,592
Total capitalization	410,446	396,365
Current Liabilities
Current portion of long-term debt	10,955	11,353
Short-term borrowing	83,470	105,666
Accounts payable	58,183	53,482
Accrued compensation	4,937	8,394
Accrued interest	2,536	1,235
Dividends payable	3,730	3,710
Income Taxes Payable	8,955	0
Mark-to-market energy liabilities	0	127
Regulatory liabilities	7,071	4,157
Customer deposits and refunds	24,405	26,140
Other accrued liabilities	8,934	7,678
Total current liabilities	213,176	221,942
Deferred Credits and Other Liabilities
Deferred income taxes	142,414	142,597
Deferred investment tax credits	65	74
Regulatory liabilities	4,178	4,402
Accrued asset removal cost-Regulatory liability	40,007	39,510
Environmental liabilities	9,129	9,155
Other pension and benefit costs	20,662	21,000
Other liabilities	2,484	2,477
Total deferred credits and other liabilities	218,939	219,215
Other commitments and contingencies (Note 6)
Total Capitalization and Liabilities	$ 842,561	$ 837,522