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Derivative Financial Instruments (Details 3) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Summary of location and aggregate fair value of all derivative financial instruments recorded in the consolidated statements of operations |  |  |
Realized gain (loss) on derivatives | $ 9,482 | $ 2,334 | $ (4,321)
Unrealized (loss) gain on derivatives | (53,727) | 65,085 | 9,715
Revenues |  |  |
Summary of location and aggregate fair value of all derivative financial instruments recorded in the consolidated statements of operations |  |  |
Realized gain (loss) on derivatives | 9,482 | 2,334 | (4,321)
Unrealized (loss) gain on derivatives | (53,727) | 65,085 | 9,715
Total | (44,245) | 67,419 | 5,394
Oil | Revenues |  |  |
Summary of location and aggregate fair value of all derivative financial instruments recorded in the consolidated statements of operations |  |  |
Realized gain (loss) on derivatives | 9,026 | 3,741 | (3,657)
Unrealized (loss) gain on derivatives | (53,443) | 65,991 | 2,638
Natural Gas | Revenues |  |  |
Summary of location and aggregate fair value of all derivative financial instruments recorded in the consolidated statements of operations |  |  |
Realized gain (loss) on derivatives | 456 | (1,407) | (608)
Unrealized (loss) gain on derivatives | (284) | (906) | 7,077
NGLs | Revenues |  |  |
Summary of location and aggregate fair value of all derivative financial instruments recorded in the consolidated statements of operations |  |  |
Realized gain (loss) on derivatives | $ 0 | $ 0 | $ (56)

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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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- Definition The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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