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v3.19.3.a.u2

Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Public Utility Property, Plant, and Equipment [Table Text Block] |
Jointly Owned Facilities (dollars in thousands) |  | OTP Ownership Percentage |  |  | Electric Plant in Service |  |  | Construction Work in Progress |  |  | Accumulated Depreciation |  |  | Net Plant |
December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Big Stone Plant |  |  | 53.9 | % |  | $ | 337,197 |  |  | $ | 384 |  |  | $ | (98,654 | ) |  | $ | 238,927 |
Coyote Station |  |  | 35.0 | % |  |  | 184,493 |  |  |  | 83 |  |  |  | (108,248 | ) |  |  | 76,328 |
Big Stone South–Ellendale 345 kV line1 |  |  | 50.0 | % |  |  | 106,343 |  |  |  | - |  |  |  | (819 | ) |  |  | 105,524 |
Fargo–Monticello 345 kV line |  |  | 14.2 | % |  |  | 78,184 |  |  |  | - |  |  |  | (7,011 | ) |  |  | 71,173 |
Big Stone South–Brookings 345 kV line |  |  | 50.0 | % |  |  | 53,036 |  |  |  | - |  |  |  | (2,016 | ) |  |  | 51,020 |
Brookings–Southeast Twin Cities 345 kV line |  |  | 4.8 | % |  |  | 26,286 |  |  |  | - |  |  |  | (2,086 | ) |  |  | 24,200 |
Bemidji–Grand Rapids 230 kV line |  |  | 14.8 | % |  |  | 16,331 |  |  |  | - |  |  |  | (233 | ) |  |  | 16,098 |
December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Big Stone Plant |  |  | 53.9 | % |  | $ | 336,051 |  |  | $ | 361 |  |  | $ | (92,007 | ) |  | $ | 244,405 |
Coyote Station |  |  | 35.0 | % |  |  | 177,713 |  |  |  | 2,588 |  |  |  | (100,997 | ) |  |  | 79,304 |
Big Stone South–Ellendale 345 kV line1 |  |  | 50.0 | % |  |  | - |  |  |  | 106,490 |  |  |  | - |  |  |  | 106,490 |
Fargo–Monticello 345 kV line |  |  | 14.2 | % |  |  | 78,184 |  |  |  | - |  |  |  | (5,891 | ) |  |  | 72,293 |
Big Stone South–Brookings 345 kV line |  |  | 50.0 | % |  |  | 53,235 |  |  |  | (150 | ) |  |  | (1,264 | ) |  |  | 51,821 |
Brookings–Southeast Twin Cities 345 kV line |  |  | 4.8 | % |  |  | 26,281 |  |  |  | - |  |  |  | (1,713 | ) |  |  | 24,568 |
Bemidji–Grand Rapids 230 kV line |  |  | 14.8 | % |  |  | 16,331 |  |  |  | - |  |  |  | (2,091 | ) |  |  | 14,240 |
Investment [Table Text Block] |
(in thousands) |  | 2019 |  |  | 2018 |
Cost Method: |  |  |  |  |  |  |  |
Economic Development Loan Pools |  | $ | 24 |  |  | $ | 34 |
Other |  |  | 73 |  |  |  | 123 |
Equity Method Partnerships |  |  | 27 |  |  |  | 26 |
Marketable Debt Securities Classified as Available-for-Sale |  |  | 8,184 |  |  |  | 7,484 |
Marketable Equity Securities Classified as Available-for-Sale |  |  | 1,586 |  |  |  | 1,294 |
Total Investments |  | $ | 9,894 |  |  | $ | 8,961 |
Schedule of Inventory, Current [Table Text Block] |
|  | December 31, |  |  | December 31, |
(in thousands) |  | 2019 |  |  | 2018 |
Finished Goods |  | $ | 31,863 |  |  | $ | 37,130 |
Work in Process |  |  | 16,508 |  |  |  | 20,393 |
Raw Material, Fuel and Supplies |  |  | 49,480 |  |  |  | 48,747 |
Total Inventories |  | $ | 97,851 |  |  | $ | 106,270 |
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
December 31, 2019 (in thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Investments: |  |  |  |  |  |  |  |  |  |  |  |
Equity Funds – Held by Captive Insurance Company |  | $ | 1,586 |  |  |  |  |  |  |  |  |
Corporate Debt Securities – Held by Captive Insurance Company |  |  |  |  |  | $ | 2,124 |  |  |  |  |
Government-Backed and Government-Sponsored Enterprises’ Debt Securities – Held by Captive Insurance Company |  |  |  |  |  |  | 6,060 |  |  |  |  |
Other Assets: |  |  |  |  |  |  |  |  |  |  |  |
Money Market and Mutual Funds – Retirement Plans |  |  | 2,363 |  |  |  |  |  |  |  |  |
Total Assets |  | $ | 3,949 |  |  | $ | 8,184 |  |  |  |  |
December 31, 2018 (in thousands) |  | Level 1 |  |  | Level 2 |  |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Investments: |  |  |  |  |  |  |  |  |  |  |  |
Equity Funds – Held by Captive Insurance Company |  | $ | 1,294 |  |  |  |  |  |  |  |  |
Corporate Debt Securities – Held by Captive Insurance Company |  |  |  |  |  | $ | 5,898 |  |  |  |  |
Government-Backed and Government-Sponsored Enterprises’ Debt Securities – Held by Captive Insurance Company |  |  |  |  |  |  | 1,586 |  |  |  |  |
Other Assets: |  |  |  |  |  |  |  |  |  |  |  |
Money Market and Mutual Funds – Nonqualified Retirement Savings Plan |  |  | 838 |  |  |  |  |  |  |  |  |
Total Assets |  | $ | 2,132 |  |  | $ | 7,484 |  |  |  |  |
Schedule of Goodwill [Table Text Block] |
(in thousands) |  | Gross Balance December 31, 2018 |  |  | Accumulated Impairments |  |  | Balance (net of impairments) December 31, 2018 |  |  | Adjustments to Goodwill in 2019 |  |  | Balance (net of impairments) December 31, 2019 |
Manufacturing |  | $ | 18,270 |  |  | $ | - |  |  | $ | 18,270 |  |  | $ | - |  |  | $ | 18,270 |
Plastics |  |  | 19,302 |  |  |  | - |  |  |  | 19,302 |  |  |  | - |  |  |  | 19,302 |
Total |  | $ | 37,572 |  |  | $ | - |  |  | $ | 37,572 |  |  | $ | - |  |  | $ | 37,572 |
(in thousands) |  | Gross Balance December 31, 2017 |  |  | Accumulated Impairments |  |  | Balance (net of impairments) December 31, 2017 |  |  | Adjustments to Goodwill in 2018 |  |  | Balance (net of impairments) December 31, 2018 |
Manufacturing |  | $ | 18,270 |  |  | $ | - |  |  | $ | 18,270 |  |  | $ | - |  |  | $ | 18,270 |
Plastics |  |  | 19,302 |  |  |  | - |  |  |  | 19,302 |  |  |  | - |  |  |  | 19,302 |
Total |  | $ | 37,572 |  |  | $ | - |  |  | $ | 37,572 |  |  | $ | - |  |  | $ | 37,572 |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
December 31, 2019 (in thousands) |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |  |  | Remaining Amortization Periods (months) |
Amortizable Intangible Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer Relationships |  | $ | 22,491 |  |  | $ | 11,259 |  |  | $ | 11,232 |  |  |  | 88 - 188 |
Other |  |  | 179 |  |  |  | 121 |  |  |  | 58 |  |  |  | 8 - 45 |
Total |  | $ | 22,670 |  |  | $ | 11,380 |  |  | $ | 11,290 |  |  |  |  |
December 31, 2018 (in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortizable Intangible Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer Relationships |  | $ | 22,491 |  |  | $ | 10,127 |  |  | $ | 12,364 |  |  |  | 12 - 200 |
Other |  |  | 154 |  |  |  | 68 |  |  |  | 86 |  |  |  | 20 |
Total |  | $ | 22,645 |  |  | $ | 10,195 |  |  | $ | 12,450 |  |  |  |  |
Finite-lived Intangible Assets Amortization Expense [Table Text Block] |
(in thousands) |  | 2019 |  |  | 2018 |  |  | 2017 |
Amortization Expense – Intangible Assets |  | $ | 1,186 |  |  | $ | 1,315 |  |  | $ | 1,347 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
(in thousands) |  | 2020 |  |  | 2021 |  |  | 2022 |  |  | 2023 |  |  | 2024 |
Estimated Amortization Expense – Intangible Assets |  | $ | 1,140 |  |  | $ | 1,105 |  |  | $ | 1,105 |  |  | $ | 1,104 |  |  | $ | 1,099 |
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] |
|  | As of December 31, |
(in thousands) |  | 2019 |  |  | 2018 |
Noncash Investing Activities: |  |  |  |  |  |  |  |
Transactions Related to Capital Additions not Settled in Cash |  | $ | 37,429 |  |  | $ | 13,757 |
(in thousands) |  | 2019 |  |  | 2018 |  |  | 2017 |
Cash Paid During the Year for: |  |  |  |  |  |  |  |  |  |  |  |
Interest (net of amount capitalized) |  | $ | 30,132 |  |  | $ | 28,109 |  |  | $ | 29,791 |
Income Taxes |  | $ | 4,797 |  |  | $ | 6,109 |  |  | $ | 5,064 |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] |
(in thousands) |  | Unrealized Gains on Available-for- Sale Securities |  |  | Unamortized Actuarial Losses and Prior Service Costs on Pension and Other Postretirement Benefits |  |  | AOCI/(L) |
Balance on December 22, 2017 – Pre-tax |  | $ | 71 |  |  | $ | (5,672 | ) |  | $ | (5,601 | )
Effect of TCJA 14% Federal Tax Rate Reduction on Gross Deferred Tax Amounts |  | $ | 10 |  |  | $ | (794 | ) |  | $ | (784 | )

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