Leases - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014 Property Person Entity State	Sep. 30, 2013	Sep. 30, 2014 Property Person Entity State	Sep. 30, 2013
Operating Leased Assets [Line Items]
Number of real estate properties acquired	313		313
Number of States in which Entity Operates	29		29
Number of third party operators	38		38
Total Assets leased to private operators	53.60%		53.60%
Number of operators taken assets on lease	5		5
Percentage of assets representation range maximum	5.30%		5.30%
Rental income	$ 46,079,000	$ 31,693,000	$ 127,941,000	$ 99,206,000
Maximum rental income generated by another operator			7.50%
Texas
Operating Leased Assets [Line Items]
Assets in different states	16.90%		16.90%
Ohio
Operating Leased Assets [Line Items]
Assets in different states	12.10%		12.10%
California
Operating Leased Assets [Line Items]
Assets in different states	10.70%		10.70%
Washington
Operating Leased Assets [Line Items]
Assets in different states	7.00%		7.00%
Connecticut
Operating Leased Assets [Line Items]
Assets in different states	6.50%		6.50%
Saber Health Group
Operating Leased Assets [Line Items]
Assets held by operators	11.40%		11.40%
Rental income from operators			16,300,000
Rental income from operators, in percentage			12.70%
Daybreak Healthcare
Operating Leased Assets [Line Items]
Assets held by operators	9.60%		9.60%
Rental income from operators			17,000,000
Rental income from operators, in percentage			13.30%
Fundamental
Operating Leased Assets [Line Items]
Assets held by operators	8.40%		8.40%
Maplewood
Operating Leased Assets [Line Items]
Assets held by operators	13.10%		13.10%
EmpRes
Operating Leased Assets [Line Items]
Assets held by operators	11.10%		11.10%
Rental income from operators			$ 9,900,000
Rental income from operators, in percentage			7.70%