XML 118 R81.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Note 10 - Short-term and Long-term Borrowings - Breakdown of Assignment of Consolidated Short-term and Long-term Debt Outstanding (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Short-Term Debt | $ 6,000 | $ 18,599
Long-Term Debt | 692,351 | 592,523
Less: Current Maturities net of Unamortized Debt Issuance Costs | 183 | 172
Unamortized Long-Term Debt Issuance Costs | (2,587) | (2,349)
Total Long-Term Debt net of Unamortized Debt Issuance Costs | 689,581 | 590,002
Total Short-Term and Long-Term Debt (with current maturities) | 695,764 | 608,773
Unamortized Long-Term Debt Issuance Costs | 2,587 | 2,349
The 3.55% Guaranteed Senior Notes, Due December 15, 2026 [Member] |  |
Long-Term Debt | 80,000 | 80,000
Senior Unsecured Notes 4.63%, Due December 1, 2021 [Member] |  |
Long-Term Debt | 140,000 | 140,000
Senior Unsecured Notes 6.15%, Series B, Due August 20, 2022 [Member] |  |
Long-Term Debt | 30,000 | 30,000
Senior Unsecured Notes 6.37%, Series C, Due August 20, 2027 [Member] |  |
Long-Term Debt | 42,000 | 42,000
Senior Unsecured Notes 4.68%, Series A, Due February 27, 2029 [Member] |  |
Long-Term Debt | 60,000 | 60,000
Senior Unsecured Notes 3.07%, Series A, Due October 10, 2029 [Member] |  |
Long-Term Debt | 10,000 |
Senior Unsecured Notes 6.47%, Series D, Due August 20, 2037 [Member] |  |
Long-Term Debt | 50,000 | 50,000
Senior Unsecured Notes 5.47%, Series B, Due February 27, 2044 [Member] |  |
Long-Term Debt | 90,000 | 90,000
Senior Unsecured Notes 3.52%, Series 2019B, Due October 10, 2039 [Member] |  |
Long-Term Debt | 26,000 |
Senior Unsecured Notes 4.07%, Series 2018A, Due February 7, 2048 [Member] |  |
Long-Term Debt | 100,000 | 100,000
Partnership in Assisting Community Expansion (PACE) Note, 2.54%, due March 18, 2021 [Member] |  |
Long-Term Debt | 351 | 523
Senior Unsecured Notes 3.82%, Sericies C, Due October 10, 2049 [Member] |  |
Long-Term Debt | 64,000 |
Otter Tail Power Company [Member] |  |
Short-Term Debt |  | 9,384
Long-Term Debt | 612,000 | 512,000
Unamortized Long-Term Debt Issuance Costs | (2,231) | (1,942)
Total Long-Term Debt net of Unamortized Debt Issuance Costs | 609,769 | 510,058
Total Short-Term and Long-Term Debt (with current maturities) | 609,769 | 519,442
Unamortized Long-Term Debt Issuance Costs | 2,231 | 1,942
Otter Tail Power Company [Member] | Senior Unsecured Notes 4.63%, Due December 1, 2021 [Member] |  |
Long-Term Debt | 140,000 | 140,000
Otter Tail Power Company [Member] | Senior Unsecured Notes 6.15%, Series B, Due August 20, 2022 [Member] |  |
Long-Term Debt | 30,000 | 30,000
Otter Tail Power Company [Member] | Senior Unsecured Notes 6.37%, Series C, Due August 20, 2027 [Member] |  |
Long-Term Debt | 42,000 | 42,000
Otter Tail Power Company [Member] | Senior Unsecured Notes 4.68%, Series A, Due February 27, 2029 [Member] |  |
Long-Term Debt | 60,000 | 60,000
Otter Tail Power Company [Member] | Senior Unsecured Notes 3.07%, Series A, Due October 10, 2029 [Member] |  |
Long-Term Debt | 10,000 |
Otter Tail Power Company [Member] | Senior Unsecured Notes 6.47%, Series D, Due August 20, 2037 [Member] |  |
Long-Term Debt | 50,000 | 50,000
Otter Tail Power Company [Member] | Senior Unsecured Notes 5.47%, Series B, Due February 27, 2044 [Member] |  |
Long-Term Debt | 90,000 | 90,000
Otter Tail Power Company [Member] | Senior Unsecured Notes 3.52%, Series 2019B, Due October 10, 2039 [Member] |  |
Long-Term Debt | 26,000 | 0
Otter Tail Power Company [Member] | Senior Unsecured Notes 4.07%, Series 2018A, Due February 7, 2048 [Member] |  |
Long-Term Debt | 100,000 | 100,000
Otter Tail Power Company [Member] | Senior Unsecured Notes 3.82%, Sericies C, Due October 10, 2049 [Member] |  |
Long-Term Debt | 64,000 | 0
Parent Company [Member] |  |
Short-Term Debt | 6,000 | 9,215
Long-Term Debt | 80,351 | 80,523
Less: Current Maturities net of Unamortized Debt Issuance Costs | 183 | 172
Unamortized Long-Term Debt Issuance Costs | (356) | (407)
Total Long-Term Debt net of Unamortized Debt Issuance Costs | 79,812 | 79,944
Total Short-Term and Long-Term Debt (with current maturities) | 85,995 | 89,331
Unamortized Long-Term Debt Issuance Costs | 356 | 407
Parent Company [Member] | The 3.55% Guaranteed Senior Notes, Due December 15, 2026 [Member] |  |
Long-Term Debt | 80,000 | 80,000
Parent Company [Member] | Partnership in Assisting Community Expansion (PACE) Note, 2.54%, due March 18, 2021 [Member] |  |
Long-Term Debt | $ 351 | $ 523

X
- Definition Amount, after accumulated amortization, of debt discount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the aggregate of total long-term debt, including current maturities and short-term debt. + References No definition available. + Details
Name: | us-gaap_DebtLongtermAndShorttermCombinedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(1)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_ShortTermBorrowings
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_The355GuaranteedSeniorNotesDueDecember152026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_SeniorUnsecuredNotes463DueDecember12021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_SeniorUnsecuredNotes615SeriesBDueAugust202022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_SeniorUnsecuredNotes637SeriesCDueAugust202027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_SeniorUnsecuredNotes468SeriesADueFebruary272029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_SeniorUnsecuredNotes307SeriesADueOctober102029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_SeniorUnsecuredNotes647SeriesDDueAugust202037Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_SeniorUnsecuredNotes547SeriesBDueFebruary272044Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_SeniorUnsecuredNotes352Series2019bDueOctober102039Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_SeniorUnsecuredNotes407Series2018ADueFebruary72048Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_PartnershipInAssistingCommunityExpansionPaceNote254DueMarch182021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ottr_SeniorUnsecuredNotes382SericiesCDueOctober102049Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=ottr_OtterTailPowerCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |