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Concentration of Risk - Additional Information (Detail)
$ in Millions
12 Months Ended
Oct. 01, 2015
USD ($)
principal
renewal_option
facility
Dec. 31, 2015
property
tenant
state
bed
Dec. 31, 2014
tenant
Dec. 31, 2013
tenant
Dec. 31, 2015
facility
Concentration Risk [Line Items]          
Number of major tenants | tenant   1 1 1  
Description of highest concentration of properties   The four states in which Ensign leases the highest concentration of properties are California, Texas, Utah and Arizona.      
Liberty Healthcare Portfolio [Member]          
Concentration Risk [Line Items]          
Number of facilities acquired | facility 14        
Acquisition consideration $ 176.5        
Leases period 15 years        
Leases renewal options | renewal_option 2        
Leases renewal term 5 years        
Anticipated annual lease revenues $ 17.0        
Liberty Healthcare Portfolio [Member] | Pristine Master Lease [Member]          
Concentration Risk [Line Items]          
Leases period 15 years        
Leases renewal options | renewal_option 2        
Leases renewal term 5 years        
Anticipated annual lease revenues $ 17.0        
Escalation factor for calculating revenues after year two 0.00%        
Percentage change in the consumer price index 3.00%        
Number of affiliate's principals guaranteeing lease | principal 2        
Assets Leased to Ensign [Member] | Skilled Nursing, Assisted Living and Independent Living Facilities [Member]          
Concentration Risk [Line Items]          
Number of living facilities | facility         119
Number of units available in living facilities | bed   12,144      
Ensign [Member]          
Concentration Risk [Line Items]          
Number of states where Ensign leases the highest concentration of properties | state   4      
Ensign [Member] | Assets Leased to Ensign [Member] | Skilled Nursing, Assisted Living and Independent Living Facilities [Member]          
Concentration Risk [Line Items]          
Number of living facilities   94     94
Number of units available in living facilities | bed   10,121      
Revenue [Member]          
Concentration Risk [Line Items]          
Tenant description   The Company has one major tenant, Ensign