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Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Other income | $ (141) | $ 564 | $ (17) | $ 637
Third-party midstream services revenues | 1,566 | 569 | 2,956 | 1,384
Production taxes and marketing | 12,388 | 9,426 | 30,846 | 26,734
Plant and other midstream services operating | 1,449 | 1,450 | 3,537 | 2,772
Lease operating expense | 14,605 | 13,466 | $ 41,300 | 40,140
Discount rate present value of future revenue from proved oil and gas reserves |  |  | 10.00% |
Full-cost ceiling impairment | 0 | 285,721 | $ 158,633 | 581,874
Capitalized general and administrative costs | 4,300 | 1,400 | 10,300 | 4,900
Capitalized interest expense | $ 700 | 500 | $ 2,900 | 2,900
Reclassification from Other Income to Third-Party Midstream Services Revenue [Member] | Restatement Adjustment |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Other income |  | (400) |  | (1,200)
Third-party midstream services revenues |  | 500 |  | 1,300
Reclassification from Production Taxes and Marketing Expenses to Third-Party Midstream Services Revenues [Member] | Restatement Adjustment |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Third-party midstream services revenues |  | 100 |  | 100
Production taxes and marketing |  | (100) |  | (100)
Reclassification from Lease Operating Expenses to Plant and Other Midstream Services Operating Expenses [Member] | Restatement Adjustment |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Plant and other midstream services operating |  | 1,500 |  | 2,800
Lease operating expense |  | $ (1,500) |  | $ (2,800)

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