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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2018
Fair Value Disclosures [Abstract] |
Schedule of fair value measurements | The following tables summarize the Company’s financial and non-financial liabilities by valuation level as of December 31, 2018 and 2017:
| December 31, 2018
| Level 1 |  | Level 2 |  | Level 3
| (In thousands)
Assets: |  |  |  |  |
Derivative Instruments | $ | — |  |  | $ | 21,352 |  |  | $ | — |
Liabilities: |  |  |  |  |
Derivative Instruments | $ | — |  |  | $ | 34,393 |  |  | $ | — |
| December 31, 2017
| Level 1 |  | Level 2 |  | Level 3
| (In thousands)
Assets: |  |  |  |  |
Derivative Instruments | $ | — |  |  | $ | 87,532 |  |  | $ | — |
Liabilities: |  |  |  |  |
Derivative Instruments | $ | — |  |  | $ | 35,523 |  |  | $ | — |

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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=109250915&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=99377789&loc=d3e19207-110258 + Details
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