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Real Estate (Significant Business Combination Proforma) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Business Acquisition, Pro Forma Information [Abstract]  
Revenue $ 52,992us-gaap_BusinessAcquisitionsProFormaRevenue
Net income 28,452us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Net income available to common stockholders $ 28,129nhi_BusinessAcquisitionProFormaNetincomeAvailableToCommonStockholders
Basic earnings per share $ 0.75us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic
Diluted earnings per share $ 0.75us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted