Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment
Regulated Energy		$ 1,595,744	$ 1,577,576
Unregulated Energy		306,291	300,647
Other businesses and eliminations		34,439	30,769
Total property, plant and equipment		1,936,474	1,908,992
Less: Accumulated depreciation and amortization		(380,839)	(368,743)
Plus: Construction work in progress		80,061	60,929
Net property, plant and equipment		1,635,696	1,601,178
Current Assets
Cash and cash equivalents		5,575	3,499
Trade and other receivables		58,066	56,890
Accounts Receivable, Allowance for Credit Loss, Current		(4,243)	(4,785)
Accounts Receivable, before Allowance for Credit Loss, Current		62,309	61,675
Accrued revenue		20,835	21,527
Propane inventory, at average cost		6,229	5,906
Other inventory, at average cost		5,884	5,539
Regulatory assets		9,145	10,786
Storage gas prepayments		417	2,455
Income taxes receivable		6,792	12,885
Prepaid expenses		11,512	13,239
Derivative assets, at fair value		3,462	3,269
Other current assets		635	436
Total current assets		128,552	136,431
Deferred Charges and Other Assets
Goodwill		38,731	38,731
Other intangible assets, net		7,958	8,292
Investments, at fair value		10,883	10,776
Operating Lease, Right-of-Use Asset		10,510	11,194
Regulatory assets		111,566	113,806
Receivables and other deferred charges		10,054	12,079
Total deferred charges and other assets		189,702	194,878
Total Assets		1,953,950	1,932,487
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)		8,528	8,499
Additional paid-in capital		350,875	348,482
Retained earnings		369,623	342,969
Accumulated other comprehensive loss		(2,638)	(2,865)
Deferred compensation obligation		6,992	5,679
Treasury stock		(6,992)	(5,679)
Total stockholders’ equity	[1]	726,388	697,085
Long-term debt, net of current maturities		508,525	508,499
Total capitalization		1,234,913	1,205,584
Current Liabilities
Less: current maturities		13,600	13,600
Short-term borrowing		156,123	175,644
Accounts payable		58,167	60,253
Customer deposits and refunds		32,455	33,302
Accrued interest		4,837	2,905
Dividends payable		7,709	7,683
Accrued compensation		8,990	13,994
Regulatory liabilities		19,677	6,284
Derivative liabilities, at fair value		84	127
Other accrued liabilities		14,360	15,240
Total current liabilities		316,002	329,032
Deferred Credits and Other Liabilities
Deferred income taxes		211,801	205,388
Regulatory liabilities		143,291	142,736
Environmental liabilities		4,052	4,299
Other pension and benefit costs		29,856	30,673
Operating Lease, Liability, Noncurrent		9,125	9,872
Deferred investment tax credits and other liabilities		4,910	4,903
Total deferred credits and other liabilities		403,035	397,871
Environmental and other commitments and contingencies (Notes 5 and 6)
Total Capitalization and Liabilities		$ 1,953,950	$ 1,932,487

[1] 2,000,000 shares of preferred stock at $0.01 par value have been authorized. No shares have been issued or are outstanding; accordingly, no information has been included in the statements of stockholders’ equity.