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EARNINGS PER SHARE (Schedule of Calculation of Basic and Diluted Loss or Earnings Per Share) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2015
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Mar. 31, 2014
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| Earnings Per Share [Abstract] | ||
| Net (loss) income | $ 6,529us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ (355)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic |
| Basic weighted average common shares outstanding (in shares) | 75,589,092us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 75,444,953us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
| Add: Dilutive effect of non-vested restricted common stock (in shares) | 110,000ipi_IncrementalCommonSharesAttributableToNonvestedRestrictedCommonStock | 0ipi_IncrementalCommonSharesAttributableToNonvestedRestrictedCommonStock |
| Add: Dilutive effect of performance units (in shares) | 8,000ipi_IncrementalCommonSharesAttributableToPerformanceAwards | 0ipi_IncrementalCommonSharesAttributableToPerformanceAwards |
| Diluted weighted average common shares outstanding (in shares) | 75,707,000us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 75,444,953us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
| (Loss) Earnings per share: | ||
| Basic (in dollars per share) | $ 0.09us-gaap_EarningsPerShareBasic | $ 0.00us-gaap_EarningsPerShareBasic |
| Diluted (in dollars per share) | $ 0.09us-gaap_EarningsPerShareDiluted | $ 0.00us-gaap_EarningsPerShareDiluted |
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of non-vested restricted stock arrangements using the treasury stock method. No definition available.
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- Definition
Additinaly shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of performance awards using the treasury stock method. No definition available.
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- Details
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- 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/presentationRef
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- Details
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- 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/presentationRef
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- 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
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- 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/presentationRef
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- 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/presentationRef
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