Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment
Regulated Energy		$ 1,073,736	$ 957,681
Unregulated Energy		210,682	196,800
Other businesses and eliminations		27,699	21,114
Total property, plant and equipment		1,312,117	1,175,595
Less: Accumulated depreciation and amortization		(270,599)	(245,207)
Plus: Construction work in progress		84,509	56,276
Net property, plant and equipment		1,126,027	986,664
Current Assets
Cash and cash equivalents		5,614	4,178
Accounts receivable (less allowance for uncollectible accounts of $936 and $909, respectively)		77,223	62,803
Accrued revenue		22,279	16,986
Propane inventory, at average cost		8,324	6,457
Other inventory, at average cost		12,022	4,576
Regulatory assets		10,930	7,694
Storage gas prepayments		5,250	5,484
Income taxes receivable		14,778	22,888
Prepaid expenses		13,621	6,792
Derivative assets, at fair value		1,286	823
Other current assets		7,260	2,470
Total current assets		178,587	141,151
Deferred Charges and Other Assets
Goodwill		22,104	15,070
Other intangible assets, net		4,686	1,843
Investments, at fair value		6,756	4,902
Regulatory assets		75,575	76,803
Receivables and other deferred charges		3,699	2,786
Total deferred charges and other assets		112,820	101,404
Total Assets		1,417,434	1,229,219
Stockholders’ equity
Preferred stock, par value $0.01 per share (authorized 2,000,000 shares), no shares issued and outstanding		0	0
Common stock, par value $0.4867 per share (authorized 50,000,000 shares)		7,955	7,935
Additional paid-in capital		253,470	250,967
Retained earnings		229,141	192,062
Accumulated other comprehensive loss		(4,272)	(4,878)
Deferred compensation obligation		3,395	2,416
Treasury stock		(3,395)	(2,416)
Total stockholders’ equity	[1]	486,294	446,086
Long-term debt, net of current maturities		197,395	136,954
Total capitalization		683,689	583,040
Current Liabilities
Current portion of long-term debt		9,421	12,099
Short-term borrowing		250,969	209,871
Accounts payable		74,688	56,935
Customer deposits and refunds		34,751	29,238
Accrued interest		1,742	1,312
Dividends payable		5,312	4,973
Accrued compensation		13,112	10,496
Regulatory liabilities		6,485	1,291
Derivative liabilities, at fair value		6,247	773
Other accrued liabilities		10,273	7,063
Total current liabilities		413,000	334,051
Deferred Credits and Other Liabilities
Deferred income taxes		135,850	222,894
Regulatory liabilities		140,978	43,064
Environmental liabilities		8,263	8,592
Other pension and benefit costs		29,699	32,828
Deferred investment tax credits and other liabilities		5,955	4,750
Total deferred credits and other liabilities		320,745	312,128
Commitments and Contingencies
Total Capitalization and Liabilities		$ 1,417,434	$ 1,229,219

[1] Includes 90,961, 76,745 and 70,631 shares at December 31, 2017, 2016 and 2015, respectively, held in a Rabbi Trust related to our Non-Qualified Deferred Compensation Plan