Real Estate Investments, Net - Additional Information (Detail) $ in Millions	1 Months Ended					6 Months Ended
	Jun. 30, 2016 USD ($) facility lease bed	May 31, 2016 USD ($) renewal_option unit bed	Apr. 30, 2016 USD ($) bed	Mar. 31, 2016 USD ($) renewal_option unit facility bed	Feb. 29, 2016 USD ($) renewal_option unit facility bed	Jun. 30, 2016 USD ($) facility lease bed
Investment [Line Items]
Number of facilities | facility	147					147
Number of facilities leased under triple-net leases | facility	50					50
Number of facilities not leased | facility	3					3
Remaining lease term						81 years
New Haven Assisted Living [Member]
Investment [Line Items]
Acquisition consideration					$ 4.9
Leases period					12 years 6 months
Leases renewal options | renewal_option					2
Leases renewal term					5 years
Anticipated initial annual lease revenues					$ 0.4
Number of units available in living facilities | unit					30
Trillium Healthcare Group [Member]
Investment [Line Items]
Acquisition consideration				$ 5.0	$ 32.7
Leases period					15 years
Leases renewal options | renewal_option					2
Leases renewal term					5 years
Anticipated initial annual lease revenues				$ 0.5	$ 3.2
Number of facilities acquired | facility					9
Number of skilled nursing beds | bed				82	518
Priority Life Care [Member]
Investment [Line Items]
Acquisition consideration				$ 21.2
Leases period				15 years
Leases renewal options | renewal_option				2
Leases renewal term				5 years
Anticipated initial annual lease revenues				$ 1.8
Number of facilities acquired | facility				3
Number of units available in living facilities | unit				336
Better Senior Living Consulting [Member]
Investment [Line Items]
Acquisition consideration				$ 5.7
Leases period				14 years
Leases renewal options | renewal_option				2
Leases renewal term				5 years
Anticipated initial annual lease revenues				$ 0.5
Number of units available in living facilities | unit				74
Victory Park Nursing Home [Member]
Investment [Line Items]
Number of skilled nursing beds | bed			55
Victoria Retirement Community [Member]
Investment [Line Items]
Number of skilled nursing beds | bed			90
Number of assisted living beds | bed			69
Victory Park Nursing Home and Victoria Retirement Community [Member]
Investment [Line Items]
Acquisition consideration			$ 14.7
Anticipated initial annual lease revenues			$ 1.4
Shaw Mountain At Cascadia [Member]
Investment [Line Items]
Acquisition consideration		$ 8.9
Leases period		15 years
Leases renewal options | renewal_option		3
Leases renewal term		5 years
Anticipated initial annual lease revenues		$ 0.9
Number of skilled nursing beds | bed		98
English Meadows Elks' Home [Member]
Investment [Line Items]
Acquisition consideration		$ 10.1
Contingent earn-out liability		5.0
Anticipated initial annual lease revenues		$ 0.9
Number of units available in living facilities | unit		175
Croatan Village [Member]
Investment [Line Items]
Number of units available in living facilities | unit		46
Countryside Village [Member]
Investment [Line Items]
Number of units available in living facilities | unit		21
Croatan Village And Countryside Village [Member]
Investment [Line Items]
Acquisition consideration		$ 11.8
Leases period		15 years
Leases renewal options | renewal_option		2
Leases renewal term		5 years
Anticipated initial annual lease revenues		$ 1.0
Premier Senior Living [Member]
Investment [Line Items]
Acquisition consideration	$ 30.7
Anticipated initial annual lease revenues	$ 2.5
Number of facilities acquired | facility	4					4
Number of assisted living beds | bed	188					188
Ensign Master Leases [Member]
Investment [Line Items]
Number of facilities leased under master leases | facility	94					94
Number of master leases | lease	8					8
Annual revenues from Master Leases during first year	$ 56.0					$ 56.0
Lease term for fixed contractual annual revenues						2 years
Escalation factor for calculating revenues after year two	0.00%					0.00%
Percentage change in the consumer price index	2.50%					2.50%