Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current Assets
Cash and Cash Equivalents	$ 7,884	$ 21,199
Accounts Receivable:
Trade—Net	96,158	77,947
Other	7,228	8,773
Inventories	98,152	97,851
Unbilled Receivables	19,057	20,911
Income Taxes Receivable	0	1,487
Regulatory Assets	20,358	21,650
Other	7,347	5,042
Total Current Assets	256,184	254,860
Investments	9,462	9,894
Other Assets	38,252	40,196
Goodwill	37,572	37,572
Other Intangibles—Net	10,993	11,290
Regulatory Assets	142,734	144,138
Right of Use Assets - Operating Leases	21,433	21,851
Plant
Electric Plant in Service	2,211,880	2,212,884
Nonelectric Operations	251,804	247,356
Construction Work in Progress	234,025	185,238
Total Gross Plant	2,697,709	2,645,478
Less Accumulated Depreciation and Amortization	908,337	891,684
Net Plant	1,789,372	1,753,794
Total Assets	2,306,002	2,273,595
Current Liabilities
Short-Term Debt	19,893	6,000
Current Maturities of Long-Term Debt	306	183
Accounts Payable	99,501	120,775
Accrued Salaries and Wages	14,889	22,730
Accrued Taxes	18,234	17,525
Regulatory Liabilities	9,804	7,480
Current Operating Lease Liabilities	4,197	4,136
Other Accrued Liabilities	8,864	10,912
Total Current Liabilities	175,688	189,741
Pensions Benefit Liability	87,214	98,970
Other Postretirement Benefits Liability	71,580	71,437
Long-Term Operating Lease Liabilities	17,755	18,193
Other Noncurrent Liabilities	30,912	30,833
Commitments and Contingencies (note 9)
Deferred Credits
Deferred Income Taxes	137,816	131,941
Deferred Tax Credits	18,297	18,626
Regulatory Liabilities	239,108	239,906
Other	3,295	2,885
Total Deferred Credits	398,516	393,358
Capitalization
Long-Term Debt—Net	724,318	689,581
Common Shares, Par Value $5 Per Share—Authorized, 50,000,000 Shares; Outstanding, 2020—40,376,448 Shares; 2019—40,157,591 Shares	201,882	200,788
Premium on Common Shares	372,669	364,790
Retained Earnings	231,702	222,341
Accumulated Other Comprehensive Loss	(6,234)	(6,437)
Total Common Equity	800,019	781,482
Total Capitalization	1,524,337	1,471,063
Total Liabilities and Equity	2,306,002	2,273,595
Cumulative Preferred Shares [Member]
Capitalization
Cumulative Shares	0	0
Cumulative Preference Shares [Member]
Capitalization
Cumulative Shares	$ 0	$ 0