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DEBT AND FINANCING ARRANGEMENTS (Tables) | 6 Months Ended
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Jun. 30, 2021
Details on Long Term Debt | Details on long-term debt at June 30, 2021, June 30, 2020 and December 31, 2020 are shown below:
($ millions) |  | June 30, |  |  | December 31, |
|  | 2021 |  |  | 2020 |  |  | 2020 |
Unitil Corporation: |  |  |  |  |  |  |  |  |  |  |  |
6.33% Senior Notes, Due May 1, 2022 |  | $ | 9.0 |  |  | $ | 20.0 |  |  | $ | 15.0 |
3.70% Senior Notes, Due August 1, 2026 |  |  | 30.0 |  |  |  | 30.0 |  |  |  | 30.0 |
3.43% Senior Notes, Due December 18, 2029 |  |  | 30.0 |  |  |  | 30.0 |  |  |  | 30.0 |
Unitil Energy First Mortgage Bonds: |  |  |  |  |  |  |  |  |  |  |  |
8.49% Senior Secured Notes, Due October 14, 2024 |  |  | 3.0 |  |  |  | 4.5 |  |  |  | 3.0 |
6.96% Senior Secured Notes, Due September 1, 2028 |  |  | 16.0 |  |  |  | 18.0 |  |  |  | 16.0 |
8.00% Senior Secured Notes, Due May 1, 2031 |  |  | 15.0 |  |  |  | 15.0 |  |  |  | 15.0 |
6.32% Senior Secured Notes, Due September 15, 2036 |  |  | 15.0 |  |  |  | 15.0 |  |  |  | 15.0 |
3.58% Senior Secured Notes, Due September 15, 2040 |  |  | 27.5 |  |  |  | — |  |  |  | 27.5 |
4.18% Senior Secured Notes, Due November 30, 2048 |  |  | 30.0 |  |  |  | 30.0 |  |  |  | 30.0 |
Fitchburg: |  |  |  |  |  |  |  |  |  |  |  |
6.75% Senior Notes, Due November 30, 2023 |  |  | 1.9 |  |  |  | 3.8 |  |  |  | 1.9 |
6.79% Senior Notes, Due October 15, 2025 |  |  | 10.0 |  |  |  | 10.0 |  |  |  | 10.0 |
3.52% Senior Notes, Due November 1, 2027 |  |  | 10.0 |  |  |  | 10.0 |  |  |  | 10.0 |
7.37% Senior Notes, Due January 15, 2029 |  |  | 9.6 |  |  |  | 10.8 |  |  |  | 10.8 |
5.90% Senior Notes, Due December 15, 2030 |  |  | 15.0 |  |  |  | 15.0 |  |  |  | 15.0 |
7.98% Senior Notes, Due June 1, 2031 |  |  | 14.0 |  |  |  | 14.0 |  |  |  | 14.0 |
3.78% Senior Notes, Due September 15, 2040 |  |  | 27.5 |  |  |  | — |  |  |  | 27.5 |
4.32% Senior Notes, Due November 1, 2047 |  |  | 15.0 |  |  |  | 15.0 |  |  |  | 15.0 |
Northern Utilities: |  |  |  |  |  |  |  |  |  |  |  |
3.52% Senior Notes, Due November 1, 2027 |  |  | 20.0 |  |  |  | 20.0 |  |  |  | 20.0 |
7.72% Senior Notes, Due December 3, 2038 |  |  | 50.0 |  |  |  | 50.0 |  |  |  | 50.0 |
3.78% Senior Notes, Due September 15, 2040 |  |  | 40.0 |  |  |  | — |  |  |  | 40.0 |
4.42% Senior Notes, Due October 15, 2044 |  |  | 50.0 |  |  |  | 50.0 |  |  |  | 50.0 |
4.32% Senior Notes, Due November 1, 2047 |  |  | 30.0 |  |  |  | 30.0 |  |  |  | 30.0 |
4.04% Senior Notes, Due September 12, 2049 |  |  | 40.0 |  |  |  | 40.0 |  |  |  | 40.0 |
Granite State: |  |  |  |  |  |  |  |  |  |  |  |
3.72% Senior Notes, Due November 1, 2027 |  |  | 15.0 |  |  |  | 15.0 |  |  |  | 15.0 |
Unitil Realty Corp.: |  |  |  |  |  |  |  |  |  |  |  |
2.64% Senior Secured Notes, Due December 18, 2030 |  |  | 4.6 |  |  |  | — |  |  |  | 4.7 |
Total Long-Term Debt |  |  | 528.1 |  |  |  | 446.1 |  |  |  | 535.4 |
Less: Unamortized Debt Issuance Costs |  |  | 3.8 |  |  |  | 3.4 |  |  |  | 3.8 |
Total Long-Term Debt, net of Unamortized Debt Issuance Costs |  |  | 524.3 |  |  |  | 442.7 |  |  |  | 531.6 |
Less: Current Portion |  |  | 19.0 |  |  |  | 6.3 |  |  |  | 8.5 |
Total Long-term Debt, Less Current Portion |  | $ | 505.3 |  |  | $ | 436.4 |  |  | $ | 523.1 |
Fair Value of Long Term Debt |
($ millions) |  | June 30, |  |  | December 31, |
|  | 2021 |  |  | 2020 |  |  | 2020 |
Estimated Fair Value of Long-Term Debt |  | $ | 597.8 |  |  | $ | 516.6 |  |  | $ | 633.1 |
Borrowing Limits Amounts Outstanding and Amounts Available under Credit Facility | The following table details the borrowing limits, amounts outstanding and amounts available under the Credit Facility as of June 30 2021, June 30, 2020 and December 31, 2020:
|  | Revolving Credit Facility ($ millions) |
|  | June 30, |  |  | December 31, |
|  | 2021 |  |  | 2020 |  |  | 2020 |
Limit |  | $ | 120.0 |  |  | $ | 120.0 |  |  | $ | 120.0 |
Short-Term Borrowings Outstanding |  |  | 29.7 |  |  |  | 74.9 |  |  |  | 54.7 |
Letter of Credit Outstanding |  |  | — |  |  |  | 0.1 |  |  |  | 0.1 |
Available |  | $ | 90.3 |  |  | $ | 45.0 |  |  | $ | 65.2 |
Classification of the Company Lease Obligations | The balance sheet classification of the Company’s lease obligations was as follows:
|  | June 30, |  |  | December 31, |
Lease Obligations ($ millions) |  | 2021 |  |  | 2020 |  |  | 2020 |
Operating Lease Obligations: |  |  |  |  |  |  |  |  |  |  |  |
Other Current Liabilities (current portion) |  | $ | 1.5 |  |  | $ | 1.3 |  |  | $ | 1.5 |
Other Noncurrent Liabilities (long-term portion) |  |  | 3.4 |  |  |  | 3.2 |  |  |  | 3.7 |
Total Operating Lease Obligations |  | $ | 4.9 |  |  | $ | 4.5 |  |  | $ | 5.2 |
Capital Lease Obligations: |  |  |  |  |  |  |  |  |  |  |  |
Other Current Liabilities (current portion) |  | $ | 0.2 |  |  | $ | 0.2 |  |  | $ | 0.2 |
Other Noncurrent Liabilities (long-term portion) |  |  | 0.2 |  |  |  | 0.3 |  |  |  | 0.2 |
Total Capital Lease Obligations |  | $ | 0.4 |  |  | $ | 0.5 |  |  | $ | 0.4 |
Total Lease Obligations |  | $ | 5.3 |  |  | $ | 5.0 |  |  | $ | 5.6 |
Future Operating Lease Payment Obligations and Future Minimum Lease Payments under Capital Leases | The following table is a schedule of future operating lease payment obligations and future minimum lease payments under capital leases as of June 30, 2021. The payments for operating leases consist of $1.5 million of current operating lease obligations, which are included in Other Current Liabilities and $3.4 million of noncurrent operating lease obligations, which are included in Other Noncurrent Liabilities, on the Company’s Consolidated Balance Sheets as of June 30, 2021. The payments for capital leases consist of $0.2 million of current capital lease obligations, which are included in Other Current Liabilities and $0.2 million of noncurrent capital lease obligations, which are included in Other Noncurrent Liabilities, on the Company’s Consolidated Balance Sheets as of June 30, 2021.
Lease Payments ($000’s) Year Ending December 31, |  | Operating Leases |  |  | Capital Leases |
Rest of 2021 |  | $ | 915 |  |  | $ | 89 |
2022 |  |  | 1,589 |  |  |  | 150 |
2023 |  |  | 1,293 |  |  |  | 107 |
2024 |  |  | 964 |  |  |  | 52 |
2025 |  |  | 397 |  |  |  | 19 |
2026-2030 |  |  | 148 |  |  |  | — |
Total Payments |  |  | 5,306 |  |  |  | 417 |
Less: Interest |  |  | 367 |  |  |  | 18 |
Amount of Lease Obligations Recorded on Consolidated Balance Sheets |  | $ | 4,939 |  |  | $ | 399 |

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