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Related Party Transactions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Related Party Transaction [Line Items]    
Direct administrative expenses incurred and reimbursed to related party $ 0.9mcep_ReimbursementOfExpensesToRelatedParty $ 1.0mcep_ReimbursementOfExpensesToRelatedParty
Mid-Con Energy Operating [Member]    
Related Party Transaction [Line Items]    
Other transactions of related party 1.1us-gaap_DueToRelatedPartiesCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember		  
Payment of joint interest billing 0.8mcep_RelatedPartyTransactionServiceFees
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember		  
Payment of operating services $ 0.3mcep_RelatedPartyTransactionOtherServiceExpensesFromTransactionsWithRelatedParty
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_AffiliatedEntityMember