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Fair Value of Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2021
Fair Value Disclosures [Abstract] |
Fair Value, Assets Measured on Recurring Basis | The financial instrument measured at fair value on a recurring basis is summarized below:
| Fair Value Measurements at March 31, 2021 |  | Fair Value Measurements at December 31, 2020
Description | Level 1 |  | Level 2 |  | Level 3 |  | Level 1 |  | Level 2 |  | Level 3
Gas Derivatives | $ | — |  |  | $ | 148,556 |  |  | $ | — |  |  | $ | — |  |  | $ | 117,545 |  |  | $ | — |
Interest Rate Swaps | $ | — |  |  | $ | (10,077) |  |  | $ | — |  |  | $ | — |  |  | $ | (14,270) |  |  | $ | — |
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis | The carrying amounts and fair values of financial instruments for which the fair value option was not elected are as follows:
| March 31, 2021 |  | December 31, 2020
| Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
Cash and Cash Equivalents | $ | 29,610 |  |  | $ | 29,610 |  |  | $ | 15,617 |  |  | $ | 15,617 |
Long-Term Debt (Excluding Debt Issuance Costs) | $ | 2,394,177 |  |  | $ | 2,671,992 |  |  | $ | 2,450,853 |  |  | $ | 2,638,251 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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