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Significant Accounting Policy Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Dec. 31, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations Attributable to Parent | $ 73,666 us-gaap_IncomeLossFromContinuingOperations | $ (1,645)us-gaap_IncomeLossFromContinuingOperations | $ 146,595 us-gaap_IncomeLossFromContinuingOperations | $ (24,935)us-gaap_IncomeLossFromContinuingOperations | $ 121,691 us-gaap_IncomeLossFromContinuingOperations | $ (72,169)us-gaap_IncomeLossFromContinuingOperations | $ 8,562 us-gaap_IncomeLossFromContinuingOperations | $ (3,724)us-gaap_IncomeLossFromContinuingOperations | $ 168,777 us-gaap_IncomeLossFromContinuingOperations | $ 79,264 us-gaap_IncomeLossFromContinuingOperations | $ 317,959 us-gaap_IncomeLossFromContinuingOperations
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax | 0 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 0 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 591,144 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 0 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | (5,687)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 8,120 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | (21,375)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 1,903 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | (5,687)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 579,792 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 70,114 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
Less: Net Loss (Income) Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | 1,386 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | 397 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net Income Attributable to CONSOL Energy Inc Shareholders | $ 73,666 us-gaap_NetIncomeLoss | $ (1,645)us-gaap_NetIncomeLoss | $ 738,183 us-gaap_NetIncomeLoss | $ (24,935)us-gaap_NetIncomeLoss | $ 116,004 us-gaap_NetIncomeLoss | $ (63,651)us-gaap_NetIncomeLoss | $ (12,526)us-gaap_NetIncomeLoss | $ (1,564)us-gaap_NetIncomeLoss | $ 163,090 us-gaap_NetIncomeLoss | $ 660,442 us-gaap_NetIncomeLoss | $ 388,470 us-gaap_NetIncomeLoss
Weighted Average Number of Shares Outstanding, Basic |  |  |  |  |  |  |  |  | 229,994,407 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 228,728,628 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 227,593,524 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of stock-based compensation awards |  |  |  |  |  |  |  |  | 1,585,871 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 1,349,314 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 1,548,243 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Weighted Average Number of Shares Outstanding, Diluted |  |  |  |  |  |  |  |  | 231,580,278 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 230,077,942 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 229,141,767 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Earnings Per Share, Basic | $ 0.32 us-gaap_EarningsPerShareBasic | $ (0.01)us-gaap_EarningsPerShareBasic | $ 3.23 us-gaap_EarningsPerShareBasic | $ (0.11)us-gaap_EarningsPerShareBasic | $ 0.51 us-gaap_EarningsPerShareBasic | $ (0.28)us-gaap_EarningsPerShareBasic | $ (0.05)us-gaap_EarningsPerShareBasic | $ (0.01)us-gaap_EarningsPerShareBasic | $ 0.71 us-gaap_EarningsPerShareBasic | $ 2.89 us-gaap_EarningsPerShareBasic | $ 1.71 us-gaap_EarningsPerShareBasic
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share | $ 0.00 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.00 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 2.59 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.00 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ (0.02)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.03 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ (0.09)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ (0.02)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 2.54 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare | $ 0.31 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Income (Loss) from Continuing Operations, Per Basic Share | $ 0.32 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ (0.01)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.64 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ (0.11)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.53 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ (0.31)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.04 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ (0.02)us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.73 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 0.35 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare | $ 1.40 us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Earnings Per Share, Diluted | $ 0.32 us-gaap_EarningsPerShareDiluted | $ (0.01)us-gaap_EarningsPerShareDiluted | $ 3.21 us-gaap_EarningsPerShareDiluted | $ (0.11)us-gaap_EarningsPerShareDiluted | $ 0.50 us-gaap_EarningsPerShareDiluted | $ (0.28)us-gaap_EarningsPerShareDiluted | $ (0.05)us-gaap_EarningsPerShareDiluted | $ (0.01)us-gaap_EarningsPerShareDiluted | $ 0.70 us-gaap_EarningsPerShareDiluted | $ 2.87 us-gaap_EarningsPerShareDiluted | $ 1.70 us-gaap_EarningsPerShareDiluted
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share | $ 0.00 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.00 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 2.57 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.00 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ (0.03)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.03 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ (0.09)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.01 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ (0.03)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 2.52 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare | $ 0.31 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Income (Loss) from Continuing Operations, Per Diluted Share | $ 0.32 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ (0.01)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.64 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ (0.11)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.53 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ (0.31)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.04 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ (0.02)us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.73 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 0.35 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare | $ 1.39 us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare

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- Definition Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4613673-111683 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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