Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022		Dec. 31, 2021
Property, Plant and Equipment
Regulated Energy	$ 1,741,731		$ 1,720,287
Unregulated Energy	376,468		357,259
Other businesses and eliminations	34,692		35,418
Total property, plant and equipment	2,152,891		2,112,964
Less: Accumulated depreciation and amortization	(427,998)		(417,479)
Net property, plant and equipment	1,755,380		1,744,878
Current Assets
Cash and cash equivalents	5,208		4,976
Trade and other receivables	51,841		58,482
Accounts Receivable, Allowance for Credit Loss, Current	(2,842)		(3,141)
Accounts Receivable, before Allowance for Credit Loss, Current	54,683		61,623
Accrued revenue	21,532		22,513
Propane inventory, at average cost	9,772		11,644
Other inventory, at average cost	10,228		9,345
Regulatory assets	20,438		19,794
Storage gas prepayments	650		3,691
Income taxes receivable	11,326		17,460
Prepaid expenses	13,754		17,121
Derivative assets, at fair value	7,516		7,076
Other current assets	703		1,033
Total current assets	152,968		173,135
Deferred Charges and Other Assets
Goodwill	44,708		44,708
Other intangible assets, net	12,832		13,192
Investments, at fair value	11,561		12,095
Operating Lease, Right-of-Use Asset	16,231		10,139
Regulatory assets	101,611		104,173
Receivables and other deferred charges	14,338		12,549
Total deferred charges and other assets	201,281		196,856
Total Assets	2,109,629		2,114,869
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)	8,624		8,593
Additional paid-in capital	373,694		371,162
Retained earnings	421,344		393,072
Accumulated other comprehensive income	1,850		1,303
Deferred compensation obligation	6,477		7,240
Treasury stock	(6,477)		(7,240)
Total stockholders’ equity	805,512	[1]	774,130
Total capitalization	1,403,390		1,324,033
Current Liabilities
Less: current maturities	19,717		17,962
Short-term borrowing	140,865		221,634
Accounts payable	30,259		52,628
Customer deposits and refunds	33,374		36,488
Accrued interest	4,950		2,775
Dividends payable	8,504		8,466
Accrued compensation	9,270		15,505
Regulatory liabilities	9,427		2,312
Derivative liabilities, at fair value	484		743
Other accrued liabilities	22,863		17,920
Total current liabilities	279,713		376,433
Deferred Credits and Other Liabilities
Deferred income taxes	241,132		233,550
Regulatory liabilities	142,807		142,488
Environmental liabilities	3,271		3,538
Other pension and benefit costs	23,073		24,120
Operating Lease, Liability, Noncurrent	14,161		8,571
Deferred investment tax credits and other liabilities	2,082		2,136
Total deferred credits and other liabilities	426,526		414,403
Environmental and other commitments and contingencies (Notes 5 and 6)
Total Capitalization and Liabilities	2,109,629		2,114,869
Other businesses and eliminations	34,692		35,418
Property, Plant and Equipment, Gross	2,152,891		2,112,964
Construction Work in Progress	30,487		49,393
Property, Plant and Equipment, Net	1,755,380		1,744,878
Trade and other receivables	51,841		58,482
Income taxes receivable	11,326		17,460
Other current assets	703		1,033
Assets, Current	152,968		173,135
Receivables and other deferred charges	14,338		12,549
Deferred Charges And Other Assets	201,281		196,856
Total identifiable assets	2,109,629		2,114,869
Regulated Energy	1,741,731		1,720,287
Unregulated Energy	376,468		357,259
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	427,998		417,479
Cash and cash equivalents	5,208		4,976
Accounts Receivable, before Allowance for Credit Loss, Current	54,683		61,623
Allowance for uncollectible accounts	2,842		3,141
Accrued revenue	21,532		22,513
Propane inventory, at average cost	9,772		11,644
Other inventory, at average cost	10,228		9,345
Regulatory assets	20,438		19,794
Storage gas prepayments	650		3,691
Prepaid expenses	13,754		17,121
Derivative assets, at fair value	7,516		7,076
Goodwill	44,708		44,708
Other intangible assets, net	12,832		13,192
Investments, at fair value	11,561		12,095
Operating Lease, Right-of-Use Asset	16,231		10,139
Regulatory assets	101,611		104,173
Preferred stock, par value $0.01 per share (authorized 2,000,000 shares), no shares issued and outstanding	0		0
Stockholders' Equity Attributable to Parent	805,512	[1]	774,130
Capitalization, Long-term Debt and Equity	1,403,390		1,324,033
Accounts payable	30,259		52,628
Other accrued liabilities	22,863		17,920
Liabilities, Current	279,713		376,433
Regulatory liabilities	142,807		142,488
Operating Lease, Liability, Noncurrent	14,161		8,571
Deferred investment tax credits and other liabilities	2,082		2,136
Deferred Credits and Other Liabilities	426,526		414,403
Environmental and other commitments and contingencies (Notes 5 and 6)
Liabilities and Equity	2,109,629		2,114,869
Common stock, par value $0.4867 per share (authorized 50,000,000 shares)	8,624		8,593
Additional paid-in capital	373,694		371,162
Retained earnings	421,344		393,072
Accumulated other comprehensive income	1,850		1,303
Deferred compensation obligation	6,477		7,240
Treasury Stock, Value	6,477		7,240
Long-term Debt and Capital Lease Obligations, Net of Current Maturities	597,878		549,903
Less: current maturities	19,717		17,962
Short-term borrowing	140,865		221,634
Customer deposits and refunds	33,374		36,488
Accrued interest	4,950		2,775
Dividends payable	8,504		8,466
Accrued compensation	9,270		15,505
Regulatory liabilities	9,427		2,312
Energy Marketing Contract Liabilities, Current	484		743
Deferred income taxes	241,132		233,550
Environmental liabilities	3,271		3,538
Other pension and benefit costs	$ 23,073		$ 24,120

[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.