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Computation of Net Income Per Common Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]    
Net income (loss) $ 15,088us-gaap_ProfitLoss $ 13,041us-gaap_ProfitLoss
Numerator:    
Less: net loss attributable to noncontrolling interests (82)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (485)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net income (loss) attributable to The Ensign Group, Inc. $ 15,170us-gaap_NetIncomeLoss $ 13,526us-gaap_NetIncomeLoss
Denominator:    
Weighted average common shares outstanding 23,908us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 22,168us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Basic net income (loss) per common share:    
Income (loss) from continuing operations attributable to The Ensign Group, Inc. $ 0.63ensg_IncomeLossFromContinuingOperationsAttributableToParentPerBasicShare $ 0.61ensg_IncomeLossFromContinuingOperationsAttributableToParentPerBasicShare
Net income (loss) attributable to The Ensign Group, Inc. $ 0.63us-gaap_EarningsPerShareBasic $ 0.61us-gaap_EarningsPerShareBasic
Common Class A [Member]    
Denominator:    
Weighted average common shares outstanding 23,908us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember		 22,168us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember