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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Current Assets    
Cash and Cash Equivalents $ 1,537 $ 1,163
Receivables, net of allowance for credit losses 174,953 113,959
Inventories 148,490 92,165
Regulatory Assets 27,342 21,900
Other Current Assets 17,032 5,645
Total Current Assets 369,354 234,832
Noncurrent Assets    
Investments 56,690 51,856
Property, Plant and Equipment, net of accumulated depreciation 2,124,605 2,049,273
Regulatory Assets 125,508 168,395
Intangible Assets, net of accumulated amortization 9,044 10,144
Goodwill 37,572 37,572
Other Noncurrent Assets 32,057 26,282
Total Noncurrent Assets 2,385,476 2,343,522
Total Assets 2,754,830 2,578,354
Current Liabilities    
Short-Term Debt 91,163 80,997
Current Maturities of Long-Term Debt 29,983 140,087
Accounts Payable 135,089 120,618
Accrued Salaries and Wages 31,704 27,451
Accrued Taxes 19,245 18,831
Regulatory Liabilities 24,844 16,663
Other Current Liabilities 55,671 32,139
Total Current Liabilities 387,699 436,786
Noncurrent Liabilities and Deferred Credits    
Pensions Benefit Liability 73,973 114,055
Other Postretirement Benefits Liability 66,481 67,359
Regulatory Liabilities 234,430 233,973
Deferred Income Taxes 188,268 153,376
Deferred Tax Credits 16,661 17,405
Other Noncurrent Liabilities 62,527 60,002
Total Noncurrent Liabilities and Deferred Credits 642,340 646,170
Commitments and Contingencies (Note 13)
Capitalization    
Long-Term Debt, net of current maturities 734,014 624,432
Stockholders' Equity Attributable to Parent [Abstract]    
Common Stock: 50,000,000 shares authorized of $5 par value; 41,551,524 and 41,469,879 outstanding at December 31, 2021 and 2020 207,758 207,349
Additional Paid-In Capital 419,760 414,246
Retained Earnings 369,783 257,878
Accumulated Other Comprehensive Loss (6,524) (8,507)
Total Shareholders' Equity 990,777 870,966
Total Capitalization 1,724,791 1,495,398
Total Liabilities and Shareholders' Equity $ 2,754,830 $ 2,578,354