QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - Footnotes (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Error Corrections and Prior Period Adjustments Restatement [Line Items] | |||||||||||
| Operating income (loss) | $ (1,421) | $ 2,366 | $ (3,509) | $ (805) | $ 4,783 | $ 5,123 | $ 8,535 | $ 5,853 | $ (3,369) | $ 24,294 | $ 42,651 |
| Operating expense | (169,863) | (171,481) | (204,373) | ||||||||
| Depreciation and amortization | (49,315) | (47,337) | (46,312) | ||||||||
| Gains on asset dispositions | 4,787 | 5,953 | 6,101 | ||||||||
| Net income (loss) | (5,648) | (802) | (4,510) | (3,950) | (3,620) | 653 | 11,105 | (239) | $ (14,910) | 7,899 | $ 17,021 |
| Net income attributable to common shares | (5,538) | $ (560) | $ 1,938 | $ (3,818) | $ (3,447) | $ 861 | $ 11,333 | $ (42) | $ 8,705 | ||
| Correction of Error Related to Adjustments That Were Immaterial | |||||||||||
| Error Corrections and Prior Period Adjustments Restatement [Line Items] | |||||||||||
| Operating income (loss) | (1,700) | ||||||||||
| Operating expense | (2,000) | ||||||||||
| Depreciation and amortization | 500 | ||||||||||
| Gains on asset dispositions | (345) | ||||||||||
| Net income (loss) | 1,000 | ||||||||||
| Net income attributable to common shares | $ 1,000 | ||||||||||
| Earnings per common share | $ (0.05) | ||||||||||
| X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No definition available.
|
| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|