Real Estate Investments, Net - Additional Information (Detail) $ in Millions	1 Months Ended		3 Months Ended
	Mar. 31, 2017 USD ($) facility unit bed	Feb. 28, 2017 USD ($) unit facility	Mar. 31, 2017 USD ($) facility intangible_asset unit renewal_option lease bed
Investment [Line Items]
Number of facilities not leased | facility	3		3
Number of operating leases acquired | lease			3
Remaining lease term			81 years
Off-Market Favorable Lease [Member]
Investment [Line Items]
Number of identified intangible assets | intangible_asset			2
Premier Senior Living LLC [Member]
Investment [Line Items]
Number of facilities acquired | facility		2
Number of units available in living facilities | unit		88
Acquisition consideration | $		$ 26.1
Leases period			14 years
Leases renewal options | renewal_option			2
Leases renewal term			5 years
Anticipated initial annual lease revenues | $		$ 2.2
WLC Management Firm LLC [Member]
Investment [Line Items]
Number of facilities acquired | facility	5		5
Acquisition consideration | $	$ 29.2
Leases period	15 years
Leases renewal options | renewal_option			2
Leases renewal term			5 years
Anticipated initial annual lease revenues | $	$ 2.9
Number of skilled nursing beds | bed	455		455
Ensign Master Leases [Member]
Investment [Line Items]
Escalation factor for calculating revenues after year two	0.00%		0.00%
Percentage change in the consumer price index	2.50%		2.50%
Ensign Master Leases [Member]
Investment [Line Items]
Facilities subject to operating lease | facility	93		93
Number of living facilities | unit	161		161
Number of master leases | unit	8		8
Annualized revenues from master leases | $	$ 56.5		$ 56.5
Various Other Operators [Member]
Investment [Line Items]
Facilities subject to operating lease | facility	65		65
Number of living facilities | unit	161		161