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Acquisitions Gateway Acquisition (Details) (USD $)
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0 Months Ended | 3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
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Jan. 02, 2013
|
Dec. 31, 2014
|
Mar. 31, 2013
|
Dec. 31, 2014
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Dec. 31, 2013
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| Business Acquisition [Line Items] | |||||
| Total purchase price | $ 14,282,000 | ||||
| Cash | 12,282,000 | ||||
| Preferred stock | 2,000,000 | ||||
| Equity interest issued (in shares) | 2,000,000 | ||||
| Reserve development protection | 2,000,000 | ||||
| Reserve development protection payable | 2,000,000 | ||||
| Intangible assets | 740,000 | ||||
| Expenses incurred related to acquisitions | 694,000 | 406,000 | 694,000 | 406,000 | |
| Severance costs | 337,000 | ||||
| Integration related costs | 372,000 | ||||
| Dividend Paid By Gateway | |||||
| Business Acquisition [Line Items] | |||||
| Cash | 6,000,000 | ||||
| Cash Paid By Atlas | |||||
| Business Acquisition [Line Items] | |||||
| Cash | $ 6,300,000 | ||||