Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment
Regulated Energy	$ 1,720,287	$ 1,577,576
Unregulated Energy	357,259	300,647
Other businesses and eliminations	35,418	30,769
Total property, plant and equipment	2,112,964	1,908,992
Accumulated depreciation	417,479	368,743
Construction Work in Progress	49,393	60,929
Net property, plant and equipment	1,744,878	1,601,178
Current Assets
Cash and cash equivalents	4,976	3,499
Accounts Receivable, before Allowance for Credit Loss, Current	61,623	61,675
Allowance for uncollectible accounts	3,141	4,785
Trade receivables, net	58,482	56,890
Accrued Revenue	22,513	21,527
Propane inventory, at average cost	11,644	5,906
Other inventory, at average cost	9,345	5,539
Regulatory assets	19,794	10,786
Storage gas prepayments	3,691	2,455
Income taxes receivable	17,460	12,885
Prepaid expenses	17,121	13,239
Derivative assets, at fair value	7,076	3,269
Other current assets	1,033	436
Total current assets	173,135	136,431
Deferred Charges and Other Assets
Goodwill	44,708	38,731
Other intangible assets, net	13,192	8,292
Investments, Fair Value Disclosure	12,095	10,776
Operating Lease, Right-of-Use Asset	10,139	11,194
Regulatory assets	104,173	113,806
Receivables and other deferred charges	12,549	12,079
Total deferred charges and other assets	196,856	194,878
Total Assets	2,114,869	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)	8,593	8,499
Additional paid-in capital	371,162	348,482
Retained earnings	393,072	342,969
Accumulated other comprehensive income (loss)	1,303	(2,865)
Deferred compensation obligation	7,240	5,679
Treasury Stock, Value	(7,240)	(5,679)
Total stockholders’ equity	774,130	697,085
Long-term debt, net of current maturities	549,903	508,499
Total capitalization	1,324,033	1,205,584
Current Liabilities
Current portion of long-term debt	17,962	13,600
Short-term borrowing	221,634	175,644
Accounts payable	52,628	60,253
Customer deposits and refunds	36,488	33,302
Accrued interest	2,775	2,905
Dividends payable	8,466	7,683
Accrued compensation	15,505	13,994
Regulatory liabilities	2,312	6,284
Derivative liabilities, at fair value	743	127
Other accrued liabilities	17,920	15,240
Total current liabilities	376,433	329,032
Deferred Credits and Other Liabilities
Deferred income taxes	233,550	205,388
Regulatory liabilities	142,488	142,736
Environmental liabilities	3,538	4,299
Other pension and benefit costs	24,120	30,673
Operating Lease, Liability, Noncurrent	8,571	9,872
Deferred investment tax credits and other liabilities	2,136	4,903
Total deferred credits and other liabilities	414,403	397,871
Commitments and Contingencies
Total Capitalization and Liabilities	2,114,869	1,932,487
Regulated Energy	1,720,287	1,577,576
Unregulated Energy	357,259	300,647
Other businesses and eliminations	35,418	30,769
Total property, plant and equipment	2,112,964	1,908,992
Accumulated depreciation	417,479	368,743
Construction Work in Progress	49,393	60,929
Net property, plant and equipment	1,744,878	1,601,178
Cash and cash equivalents	4,976	3,499
Accounts Receivable, before Allowance for Credit Loss, Current	61,623	61,675
Allowance for uncollectible accounts	3,141	4,785
Trade receivables, net	58,482	56,890
Accrued Revenue	22,513	21,527
Propane inventory, at average cost	11,644	5,906
Other inventory, at average cost	9,345	5,539
Regulatory assets	19,794	10,786
Storage gas prepayments	3,691	2,455
Income taxes receivable	17,460	12,885
Prepaid expenses	17,121	13,239
Derivative assets, at fair value	7,076	3,269
Other current assets	1,033	436
Disposal Group, Including Discontinued Operation, Assets, Current	173,135	136,431
Goodwill	44,708	38,731
Other intangible assets, net	13,192	8,292
Investments, Fair Value Disclosure	12,095	10,776
Operating Lease, Right-of-Use Asset	10,139	11,194
Regulatory assets	104,173	113,806
Receivables and other deferred charges	12,549	12,079
Deferred Charges And Other Assets	196,856	194,878
Total identifiable assets	2,114,869	1,932,487
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)	8,593	8,499
Additional paid-in capital	371,162	348,482
Retained earnings	393,072	342,969
Accumulated other comprehensive income (loss)	1,303	(2,865)
Deferred compensation obligation	7,240	5,679
Treasury Stock, Value	7,240	5,679
Stockholders' Equity Attributable to Parent	774,130	697,085
Long-term debt, net of current maturities	549,903	508,499
Total capitalization	1,324,033	1,205,584
Current portion of long-term debt	17,962	13,600
Short-term borrowing	221,634	175,644
Accounts payable	52,628	60,253
Customer deposits and refunds	36,488	33,302
Accrued interest	2,775	2,905
Dividends payable	8,466	7,683
Accrued compensation	15,505	13,994
Regulatory liabilities	2,312	6,284
Derivative liabilities, at fair value	743	127
Other accrued liabilities	17,920	15,240
Liabilities, Current	376,433	329,032
Deferred income taxes	233,550	205,388
Regulatory liabilities	142,488	142,736
Environmental liabilities	3,538	4,299
Other pension and benefit costs	24,120	30,673
Operating Lease, Liability, Noncurrent	8,571	9,872
Deferred investment tax credits and other liabilities	2,136	4,903
Deferred Credits and Other Liabilities	414,403	397,871
Commitments and Contingencies
Liabilities and Equity	$ 2,114,869	$ 1,932,487