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Commitment, Contingencies And Guarantees (Tables) | 12 Months Ended
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Dec. 31, 2021
Long-term Purchase Commitment [Line Items] |
Unrecorded Unconditional Purchase Obligations Disclosure | The following is a schedule of unconditional purchase obligations required under the power purchase, transmission services and natural gas transportation and storage agreements (in thousands):
| Power purchase and transmission services agreements (a) | Natural gas transportation and storage agreements
2022 | $ | 23,985 |  | $ | 143,750 |
2023 | $ | 11,678 |  | $ | 119,923 |
2024 | $ | 2,738 |  | $ | 82,428 |
2025 | $ | — |  | $ | 58,669 |
2026 | $ | — |  | $ | 36,503 |
Thereafter | $ | — |  | $ | 60,429 |
____________________ (a) This schedule does not reflect renewable energy PPA obligations since these agreements vary based on weather conditions.
Schedule of Unit Contingent Capacity | The unit-contingent capacity amounts from Wygen III and Neil Simpson II are as follows:
Contract Years | Total Contract Capacity |  | Contingent Capacity Amounts on Wygen III |  | Contingent Capacity Amounts on Neil Simpson II
2020-2022 | 15 |  | MW |  | 7 |  | MW |  | 8 |  | MW
2022-2023 | 15 |  | MW |  | 8 |  | MW |  | 7 |  | MW
2023-2028 | 10 |  | MW |  | 5 |  | MW |  | 5 |  | MW
Lessor, Operating Lease, Payment to be Received, Fiscal Year Maturity | As of December 31, 2021, scheduled maturities of operating lease payments to be received in future years were as follows (in thousands):
| Operating Leases |  |
2022 | $ | 2,173 |  |  |
2023 | 2,204 |  |  |
2024 | 2,125 |  |  |
2025 | 2,070 |  |  |
2026 | 1,881 |  |  |
Thereafter | 51,233 |  |  |
Total lease receivables | $ | 61,686 |  |  |
Schedule of Guarantor Obligations | To the extent liabilities are incurred as a result of activities covered by these guarantees, such liabilities are included in our Consolidated Balance Sheets. See Note 8 for additional information on our off-balance sheet Letters of Credit commitment. We had the following guarantees in place as of (in thousands):
| Maximum Exposure at |
Nature of Guarantee | December 31, 2021 |  |
Indemnification for reclamation/surety bonds | $ | 55,867 |  |  |
Guarantees supporting business transactions | $ | 370,558 |  |  |
| $ | 426,425 |  |  |
Transmission Service Agreement |
Long-term Purchase Commitment [Line Items] |
Long-term Purchase Commitment | Through our subsidiaries, we have the following significant long-term power purchase contracts and transmission services agreement with non-affiliated third-parties:
Subsidiary | Contract Type | Counterparty | Fuel Type | Quantity (MW) | Expiration Date
Colorado Electric (a) | PPA | PRPA | Wind | 60 | May 31, 2030
Colorado Electric | PPA | PRPA | Coal | 25 | June 30, 2024
Colorado Electric | PPA | TC Colorado Solar, LLC | Solar | 200 | Pending Completion (b)
South Dakota Electric | PPA | PacifiCorp | Coal | 50 | December 31, 2023
South Dakota Electric (c) | Transmission Services Agreement | PacifiCorp | N/A | 50 | December 31, 2023
South Dakota Electric | PPA | PRPA | Wind | 12 | September 30, 2029
South Dakota Electric | PPA | Fall River Solar, LLC | Solar | 80 | Pending Completion (d)
Wyoming Electric (e) | PPA | Happy Jack | Wind | 30 | September 3, 2028
Wyoming Electric (f) | PPA | Silver Sage | Wind | 30 | September 30, 2029
____________________ (a) Colorado Electric sells the wind energy purchased under this PPA to City of Colorado Springs as discussed below. (b) On January 31, 2022, TC Colorado Solar, LLC (TC Solar) provided termination notice of the PPA to Colorado Electric. Colorado Electric has disputed TC Solar’s right to termination and pursuant to the agreement, has initiated discussions with TC Solar. This agreement relates to a new solar facility to be constructed and would expire 15 years after construction completion. (c) This is a firm point-to-point transmission service agreement providing the ability to deliver a maximum of 50 MW of capacity and associated energy. (d) This agreement relates to a new solar facility currently being constructed and will expire 20 years after construction completion, which is expected by the end of 2022. (e) Under a separate intercompany PSA, Wyoming Electric sells 50% of the facility output to South Dakota Electric. (f) Under a separate intercompany PSA, Wyoming Electric sells 67% of the facility output to South Dakota Electric.
Power purchased |
Long-term Purchase Commitment [Line Items] |
Long-term Purchase Commitment | Costs under these agreements for the years ended December 31 were as follows (in thousands):
Subsidiary | Contract Type | Counterparty | Fuel Type |  | 2021 | 2020 | 2019
Colorado Electric | PPA | PRPA | Wind |  | $ | 4,246 |  | $ | 2,791 |  | $ | — |
Colorado Electric | PPA | PRPA | Coal |  | $ | 4,447 |  | $ | 4,524 |  | $ | 1,802 |
South Dakota Electric | PPA | PacifiCorp | Coal |  | $ | 8,923 |  | $ | 5,897 |  | $ | 7,477 |
South Dakota Electric | Transmission Services Agreement | PacifiCorp | N/A |  | $ | 1,783 |  | $ | 1,776 |  | $ | 1,741 |
South Dakota Electric | PPA | PRPA | Wind |  | $ | 596 |  | $ | 715 |  | $ | 688 |
Wyoming Electric | PPA | Happy Jack | Wind |  | $ | 3,544 |  | $ | 4,531 |  | $ | 3,936 |
Wyoming Electric | PPA | Silver Sage | Wind |  | $ | 4,717 |  | $ | 6,203 |  | $ | 5,366 |
Purchased Gas Cost Obligation |
Long-term Purchase Commitment [Line Items] |
Long-term Purchase Commitment | At December 31, 2021, the long-term commitments to purchase quantities of natural gas under contracts indexed to the following forward indices were as follows (in MMBtus):
| 2022 | 2023 | 2024 | 2025 | 2026 | Thereafter
El Paso - Bondad Station | 31,000 | — | — | — | — | —
Kern River - Opal | 9,300 | — | — | — | — | —
El Paso - San Juan Basin | 182,550 | — | — | — | — | —
Enable East Pipeline | 1,825,000 | 450,000 | — | — | — | —
Northern Natural Gas - Demarc | 1,614 | — | — | — | — | —
Northern Natural Gas - Ventura | 1,810,000 | 1,840,000 | 1,820,000 | — | — | —
Northwest Pipeline - Wyoming | 1,531,700 | 1,510,000 | 910,000 | — | — | —
ONEOK - Oklahoma | 5,475,000 | 5,475,000 | 5,490,000 | 4,560,000 | — | —
Southern Star Central Gas Pipeline | 113,130 | — | — | — | — | —
Panhandle Eastern Pipe Line | 1,609,680 | 2,737,500 | — | — | — | —
| 12,588,974 | 12,012,500 | 8,220,000 | 4,560,000 | — | —

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