Summarized Condensed Consolidating and Combining Information - Condensed Consolidating and Combining Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues:
Rental income									$ 93,126	$ 65,979	$ 51,367
Tenant reimbursements									7,846	5,497	4,956
Independent living facilities									2,970	2,510	2,519
Interest and other income									737	965	55
Total revenues	$ 28,243	$ 27,106	$ 25,701	$ 23,629	$ 22,632	$ 17,985	$ 17,376	$ 16,958	104,679	74,951	58,897
Expenses:
Depreciation and amortization (including a below-market ground lease)									31,965	24,133	23,000
Interest expense									23,199	25,256	21,622
Loss on extinguishment of debt									0	0	4,067
Property taxes									7,846	5,497	4,956
Acquisition costs									205	0	47
Independent living facilities									2,549	2,376	2,243
General and administrative									9,297	7,655	11,105
Total expenses									75,061	64,917	67,040
Loss on sale of real estate									(265)	0	0
Income in Subsidiary									0	0	0
Net income (loss)	$ 8,388	$ 7,832	$ 7,631	$ 5,502	$ 5,003	$ 727	$ 2,266	$ 2,038	29,353	10,034	(8,143)
Other comprehensive income:
Unrealized gain on interest rate swap									0	0	167
Reclassification adjustment on interest rate swap									0	0	1,661
Comprehensive income (loss)									29,353	10,034	(6,315)
Reportable Legal Entities [Member] | Parent Guarantor [Member]
Revenues:
Rental income									0	0	0
Tenant reimbursements									0	0	0
Independent living facilities									0	0	0
Interest and other income									0	0	0
Total revenues									0	0	0
Expenses:
Depreciation and amortization (including a below-market ground lease)									0	0	0
Interest expense									0	0	0
Loss on extinguishment of debt											0
Property taxes									0	0	0
Acquisition costs									0		0
Independent living facilities									0	0	0
General and administrative									1,637	1,171	0
Total expenses									1,637	1,171	0
Loss on sale of real estate									0
Income in Subsidiary									30,990	11,205	(8,143)
Net income (loss)									29,353	10,034	(8,143)
Other comprehensive income:
Unrealized gain on interest rate swap											0
Reclassification adjustment on interest rate swap											0
Comprehensive income (loss)											(8,143)
Reportable Legal Entities [Member] | Issuers [Member]
Revenues:
Rental income									36,855	9,979	139
Tenant reimbursements									2,978	655	11
Independent living facilities									0	0	0
Interest and other income									0	19	23
Total revenues									39,833	10,653	173
Expenses:
Depreciation and amortization (including a below-market ground lease)									11,651	3,165	34
Interest expense									22,375	19,616	10,425
Loss on extinguishment of debt											0
Property taxes									2,978	655	11
Acquisition costs									205		0
Independent living facilities									0	0	0
General and administrative									7,594	6,360	11,105
Total expenses									44,803	29,796	21,575
Loss on sale of real estate									0
Income in Subsidiary									35,960	30,348	13,259
Net income (loss)									30,990	11,205	(8,143)
Other comprehensive income:
Unrealized gain on interest rate swap											0
Reclassification adjustment on interest rate swap											0
Comprehensive income (loss)											(8,143)
Reportable Legal Entities [Member] | Combined Subsidiary Guarantors [Member]
Revenues:
Rental income									45,318	45,100	42,337
Tenant reimbursements									4,359	4,375	4,460
Independent living facilities									2,970	2,510	2,519
Interest and other income									737	946	32
Total revenues									53,384	52,931	49,348
Expenses:
Depreciation and amortization (including a below-market ground lease)									17,505	18,007	19,577
Interest expense									0	18	6,315
Loss on extinguishment of debt											4,067
Property taxes									4,359	4,375	4,460
Acquisition costs									0		47
Independent living facilities									2,549	2,376	2,243
General and administrative									49	97	0
Total expenses									24,462	24,873	36,709
Loss on sale of real estate									(265)
Income in Subsidiary									0	0	0
Net income (loss)									28,657	28,058	12,639
Other comprehensive income:
Unrealized gain on interest rate swap											167
Reclassification adjustment on interest rate swap											1,661
Comprehensive income (loss)											14,467
Reportable Legal Entities [Member] | Combined Non-Guarantor Subsidiaries [Member]
Revenues:
Rental income									10,953	10,900	8,891
Tenant reimbursements									509	467	485
Independent living facilities									0	0	0
Interest and other income									0	0	0
Total revenues									11,462	11,367	9,376
Expenses:
Depreciation and amortization (including a below-market ground lease)									2,809	2,961	3,389
Interest expense									824	5,622	4,882
Loss on extinguishment of debt											0
Property taxes									509	467	485
Acquisition costs									0		0
Independent living facilities									0	0	0
General and administrative									17	27	0
Total expenses									4,159	9,077	8,756
Loss on sale of real estate									0
Income in Subsidiary									0	0	0
Net income (loss)									7,303	2,290	620
Other comprehensive income:
Unrealized gain on interest rate swap											0
Reclassification adjustment on interest rate swap											0
Comprehensive income (loss)											620
Elimination [Member]
Revenues:
Rental income									0	0	0
Tenant reimbursements									0	0	0
Independent living facilities									0	0	0
Interest and other income									0	0	0
Total revenues									0	0	0
Expenses:
Depreciation and amortization (including a below-market ground lease)									0	0	0
Interest expense									0	0	0
Loss on extinguishment of debt											0
Property taxes									0	0	0
Acquisition costs									0		0
Independent living facilities									0	0	0
General and administrative									0	0	0
Total expenses									0	0	0
Loss on sale of real estate									0
Income in Subsidiary									(66,950)	(41,553)	(5,116)
Net income (loss)									$ (66,950)	$ (41,553)	(5,116)
Other comprehensive income:
Unrealized gain on interest rate swap											0
Reclassification adjustment on interest rate swap											0
Comprehensive income (loss)											$ (5,116)