ACQUISITIONS AND DISPOSITIONS Pro Forma Results (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Property, Plant and Equipment [Abstract] | |||||||||||
| Operating revenues | $ 57,531 | $ 61,385 | $ 57,878 | $ 54,527 | $ 56,289 | $ 65,006 | $ 63,351 | $ 62,582 | $ 231,321 | $ 247,228 | $ 281,837 |
| Operating revenues, Pro Forma Adjustments | 35,789 | ||||||||||
| Operating revenues, Pro Forma Results | 317,626 | ||||||||||
| Net Income (Loss) | $ 61,694 | $ (81,448) | $ (2,787) | $ (5,620) | $ (5,538) | $ (560) | $ 1,938 | $ (3,818) | 8,705 | ||
| Net income, Pro Forma Adjustments | 377 | ||||||||||
| Net income, Pro Forma Results | $ 9,082 | ||||||||||
| X | ||||||||||
- Definition Business Acquisition, Pro Forma Net Income (Loss), Adjustment No definition available.
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- Definition Business Acquisition, Pro Forma Revenue, Adjustment No definition available.
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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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