Summarized Condensed Consolidating Information - Condensed Consolidating Income Statements (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Revenues:
Rental income	$ 22,781	$ 15,249	$ 43,678	$ 30,091
Tenant reimbursements	1,929	1,288	3,726	2,546
Independent living facilities	730	607	1,411	1,242
Interest and other income	261	232	515	455
Total revenues	25,701	17,376	49,330	34,334
Expenses:
Depreciation and amortization (including a below-market ground lease)	7,892	5,679	15,185	11,278
Interest expense	5,440	5,989	11,627	11,890
Property taxes	1,929	1,288	3,726	2,546
Independent living facilities	598	566	1,218	1,168
General and administrative	2,211	1,588	4,441	3,148
Total expenses	18,070	15,110	36,197	30,030
Income in Subsidiary	0	0	0	0
Net income	7,631	2,266	13,133	4,304	$ 10,034
Reportable Legal Entities [Member] | Parent Guarantor [Member]
Revenues:
Rental income	0	0	0	0
Tenant reimbursements	0	0	0	0
Independent living facilities	0	0	0	0
Interest and other income	0	0	0	0
Total revenues	0	0	0	0
Expenses:
Depreciation and amortization (including a below-market ground lease)	0	0	0	0
Interest expense	0	0	0	0
Property taxes	0	0	0	0
Independent living facilities	0	0	0	0
General and administrative	438	309	871	309
Total expenses	438	309	871	309
Income in Subsidiary	8,069	2,575	14,004	4,613
Net income	7,631	2,266	13,133	4,304
Reportable Legal Entities [Member] | Issuers [Member]
Revenues:
Rental income	8,742	1,249	15,639	2,091
Tenant reimbursements	697	77	1,263	129
Independent living facilities	0	0	0	0
Interest and other income	0	0	0	0
Total revenues	9,439	1,326	16,902	2,220
Expenses:
Depreciation and amortization (including a below-market ground lease)	2,778	413	4,924	708
Interest expense	5,434	4,573	10,806	9,065
Property taxes	697	77	1,263	129
Independent living facilities	0	0	0	0
General and administrative	1,773	1,157	3,504	2,717
Total expenses	10,682	6,220	20,497	12,619
Income in Subsidiary	9,312	7,469	17,599	15,012
Net income	8,069	2,575	14,004	4,613
Reportable Legal Entities [Member] | Combined Subsidiary Guarantors [Member]
Revenues:
Rental income	11,306	11,275	22,581	22,550
Tenant reimbursements	1,100	1,095	2,199	2,185
Independent living facilities	730	607	1,411	1,242
Interest and other income	261	232	515	455
Total revenues	13,397	13,209	26,706	26,432
Expenses:
Depreciation and amortization (including a below-market ground lease)	4,408	4,519	8,841	9,063
Interest expense	0	8	0	16
Property taxes	1,100	1,095	2,199	2,185
Independent living facilities	598	566	1,218	1,168
General and administrative	0	95	49	95
Total expenses	6,106	6,283	12,307	12,527
Income in Subsidiary	0	0	0	0
Net income	7,291	6,926	14,399	13,905
Reportable Legal Entities [Member] | Combined Non-Guarantor Subsidiaries [Member]
Revenues:
Rental income	2,733	2,725	5,458	5,450
Tenant reimbursements	132	116	264	232
Independent living facilities	0	0	0	0
Interest and other income	0	0	0	0
Total revenues	2,865	2,841	5,722	5,682
Expenses:
Depreciation and amortization (including a below-market ground lease)	706	747	1,420	1,507
Interest expense	6	1,408	821	2,809
Property taxes	132	116	264	232
Independent living facilities	0	0	0	0
General and administrative	0	27	17	27
Total expenses	844	2,298	2,522	4,575
Income in Subsidiary	0	0	0	0
Net income	2,021	543	3,200	1,107
Elimination [Member]
Revenues:
Rental income	0	0	0	0
Tenant reimbursements	0	0	0	0
Independent living facilities	0	0	0	0
Interest and other income	0	0	0	0
Total revenues	0	0	0	0
Expenses:
Depreciation and amortization (including a below-market ground lease)	0	0	0	0
Interest expense	0	0	0	0
Property taxes	0	0	0	0
Independent living facilities	0	0	0	0
General and administrative	0	0	0	0
Total expenses	0	0	0	0
Income in Subsidiary	(17,381)	(10,044)	(31,603)	(19,625)
Net income	$ (17,381)	$ (10,044)	$ (31,603)	$ (19,625)