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Information Regarding Proved Oil and Gas Reserves (Details 2) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward] |  |  |
Beginning of the period | $ 40,193 | $ 172,365 | $ 92,862
Sales of oil and gas production during the period, net of production costs | (8,041) | (6,232) | (5,051)
Acquisitions and divestitures | 81,066 | (4,789) |
Net change in prices and production costs | 2,974 | (154,243) | 35,806
Changes in estimated future development costs | (8,561) | 796 | (6,174)
Extensions, discoveries and improved recovery | 231 | 9,273 | 4,999
Revisions of previous quantity estimates, estimated timing of development and other | 18,492 | (9,222) | 26,521
Previously estimated development and abandonment costs incurred during the period | 12,805 | 15,008 | 14,115
Other | 0 |  |
Accretion of discount | 4,019 | 17,237 | 9,287
End of period | 143,178 | 40,193 | 172,365
Company |  |  |
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward] |  |  |
Beginning of the period | 192 | 1,766 | 3,537
Sales of oil and gas production during the period, net of production costs | (62) | (479) | (1,288)
Acquisitions and divestitures | 0 | 0 |
Net change in prices and production costs | (20) | (679) | (31)
Changes in estimated future development costs | 14 | 8 | 118
Extensions, discoveries and improved recovery | 0 | 0 | 85
Revisions of previous quantity estimates, estimated timing of development and other | 142 | (601) | (1,111)
Previously estimated development and abandonment costs incurred during the period | 0 | 0 | 102
Other | 0 |  |
Accretion of discount | 19 | 177 | 354
End of period | 285 | 192 | 1,766
Company's Share of Laramie Energy |  |  |
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flow Relating to Proved Oil and Gas Reserves [Roll Forward] |  |  |
Beginning of the period | 40,001 | 170,599 | 89,325
Sales of oil and gas production during the period, net of production costs | (7,979) | (5,753) | (3,763)
Acquisitions and divestitures | 81,066 | (4,789) |
Net change in prices and production costs | 2,994 | (153,564) | 35,837
Changes in estimated future development costs | (8,575) | 788 | (6,292)
Extensions, discoveries and improved recovery | 231 | 9,273 | 4,914
Revisions of previous quantity estimates, estimated timing of development and other | 18,350 | (8,621) | 27,632
Previously estimated development and abandonment costs incurred during the period | 12,805 | 15,008 | 14,013
Other | 0 |  |
Accretion of discount | 4,000 | 17,060 | 8,933
End of period | $ 142,893 | $ 40,001 | $ 170,599

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- Definition Amount of increase (decrease) in standardized measure of discounted future net cash flow as a result of passage of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 35 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=51678428&loc=d3e62500-109447 + Details
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