CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
Dec. 31, 2018 |
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| Income Statement [Abstract] | |||||
| REVENUE - Service revenue | $ 133,710 | $ 541,847 | $ 634,888 | $ 1,617,521 | |
| Revenue, Product and Service [Extensible List] | srt:ProductsAndServicesDomain | ||||
| COSTS AND EXPENSES | |||||
| Cost of services (exclusive of depreciation and amortization) | 99,592 | 396,922 | 468,633 | 1,164,663 | |
| General and administrative (inclusive of stock-based compensation) | 21,817 | 27,558 | 67,086 | 73,972 | |
| Depreciation and amortization | 37,467 | 37,653 | 117,844 | 106,252 | |
| Impairment expense | 0 | 0 | 16,654 | 0 | |
| Loss on disposal of assets | 11,286 | 31,153 | 39,875 | 81,578 | |
| Total costs and expenses | 170,162 | 493,286 | 710,092 | 1,426,465 | |
| OPERATING INCOME (LOSS) | (36,452) | 48,561 | (75,204) | 191,056 | |
| OTHER EXPENSE: | |||||
| Interest expense | (137) | (1,749) | (2,208) | (5,678) | |
| Other expense | (312) | (75) | (583) | (539) | |
| Total other expense | (449) | (1,824) | (2,791) | (6,217) | |
| INCOME (LOSS) BEFORE INCOME TAXES | (36,901) | 46,737 | (77,995) | 184,839 | |
| INCOME TAX (EXPENSE) BENEFIT | 7,717 | (12,340) | 15,087 | (44,504) | |
| NET INCOME (LOSS) | $ (29,184) | $ 34,397 | $ (62,908) | $ 140,335 | |
| NET INCOME (LOSS) PER COMMON SHARE: | |||||
| Basic (in dollars per share) | $ (0.29) | $ 0.34 | $ (0.62) | $ 1.40 | |
| Diluted (in dollars per share) | $ (0.29) | $ 0.33 | $ (0.62) | $ 1.35 | |
| WEIGHTED AVERAGE COMMON SHARES OUTSTANDING: | |||||
| Basic (in shares) | 100,897 | 100,606 | 100,802 | 100,423 | |
| Diluted (in shares) | 100,897 | 103,652 | 100,802 | 103,988 | |
| X | ||||||||||
- Definition Cost Of Services, Excluding Depreciation And Amortization No definition available.
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| X | ||||||||||
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total costs of sales and operating expenses for the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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| X | ||||||||||
- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The amount of net income (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. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Indicates type of revenue from product and service. Includes, but is not limited to, revenue from contract with customer and other sources. No definition available.
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| X | ||||||||||
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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