XML 52 R31.htm IDEA: XBRL DOCUMENT v2.4.1.9
Summary of Significant Accounting Policies - Summary of Income from Discontinued Operations (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Revenues:          
Oil and gas sales       $ 25,125crk_DisposalGroupIncludingDiscontinuedOperationOilAndGasSalesRevenue $ 47,109crk_DisposalGroupIncludingDiscontinuedOperationOilAndGasSalesRevenue
Costs and expenses:          
Production taxes       1,120crk_DisposalGroupIncludingDiscontinuedOperationProductionAndSeveranceTaxesOperatingExpense 2,294crk_DisposalGroupIncludingDiscontinuedOperationProductionAndSeveranceTaxesOperatingExpense
Gathering and transportation       501crk_DisposalGroupIncludingDiscontinuedOperationGasGatheringTransportationMarketingAndProcessingCosts 1,047crk_DisposalGroupIncludingDiscontinuedOperationGasGatheringTransportationMarketingAndProcessingCosts
Lease operating       9,853crk_DisposalGroupIncludingDiscontinuedOperationLeaseOperatingExpense 9,372crk_DisposalGroupIncludingDiscontinuedOperationLeaseOperatingExpense
Depletion, depreciation and amortization       8,649crk_DisposalGroupIncludingDiscontinuedOperationDepreciationDepletionAndAmortization 21,428crk_DisposalGroupIncludingDiscontinuedOperationDepreciationDepletionAndAmortization
Interest expense       6,346us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense [1] 6,669us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense [1]
Total costs and expenses       26,469crk_DisposalGroupIncludingDiscontinuedOperationCostsAndExpenses 40,810crk_DisposalGroupIncludingDiscontinuedOperationCostsAndExpenses
Gain on sale       230,008us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal  
Income from discontinued operations before income taxes       228,664us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax 6,299us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax
Income tax expense:          
Current       (2,218)crk_DisposalGroupIncludingDiscontinuedOperationCurrentIncomeTaxExpenseBenefit  
Deferred       (78,694)crk_DisposalGroupIncludingDiscontinuedOperationDeferredIncomeTaxExpenseBenefit (3,280)crk_DisposalGroupIncludingDiscontinuedOperationDeferredIncomeTaxExpenseBenefit
Total income tax expense       (80,912)crk_DisposalGroupIncludingDiscontinuedOperationIncomeTaxExpenseBenefit (3,280)crk_DisposalGroupIncludingDiscontinuedOperationIncomeTaxExpenseBenefit
Net income from discontinued operations $ (857)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax $ 151,236us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax $ (2,627)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax $ 147,752us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax $ 3,019us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
[1] Interest expense was allocated to discontinued operations based on the ratio of the net assets of discontinued operations to our consolidated net assets plus long-term debt. Interest expense is net of capitalized interest of $9,582 and $2,010 for the years ended December 31, 2012 and 2013, respectively