Summarized Condensed Consolidating and Combining Information - Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets:
Real estate investments, net	$ 645,614	$ 436,215
Other real estate investments	8,477	7,532
Cash and cash equivalents	11,467	25,320	$ 895	$ 735
Accounts receivable	2,342	2,291
Prepaid expenses and other assets	2,083	809
Deferred financing costs, net	3,183	2,973
Investment in subsidiaries	0	0
Intercompany	0	0
Total assets	673,166	475,140
Liabilities and Equity:
Senior unsecured notes payable, net	254,229	253,165
Mortgage notes payable, net	94,676	97,608
Unsecured revolving credit facility	45,000	0
Accounts payable and accrued liabilities	9,269	6,959
Dividends payable	7,704	3,946
Intercompany	0	0
Total liabilities	410,878	361,678
Equity:
Common stock	477	313
Additional paid-in capital	410,217	246,041
Cumulative distributions in excess of earnings	(148,406)	(132,892)
Total equity	262,288	113,462	162,689	184,548
Total liabilities and equity	673,166	475,140
Reportable Legal Entities [Member] | Parent Guarantor [Member]
Assets:
Real estate investments, net	0	0
Other real estate investments	0	0
Cash and cash equivalents	0	0	0
Accounts receivable	0	0
Prepaid expenses and other assets	0	0
Deferred financing costs, net	0	0
Investment in subsidiaries	269,992	117,408
Intercompany	0	0
Total assets	269,992	117,408
Liabilities and Equity:
Senior unsecured notes payable, net	0	0
Mortgage notes payable, net	0	0
Unsecured revolving credit facility	0
Accounts payable and accrued liabilities	0	0
Dividends payable	7,704	3,946
Intercompany	0	0
Total liabilities	7,704	3,946
Equity:
Common stock	477	313
Additional paid-in capital	410,217	246,041
Cumulative distributions in excess of earnings	(148,406)	(132,892)
Total equity	262,288	113,462
Total liabilities and equity	269,992	117,408
Reportable Legal Entities [Member] | Issuers [Member]
Assets:
Real estate investments, net	256,209	26,104
Other real estate investments	0	0
Cash and cash equivalents	11,467	25,320	0
Accounts receivable	519	0
Prepaid expenses and other assets	2,079	808
Deferred financing costs, net	3,183	2,973
Investment in subsidiaries	365,368	335,020
Intercompany	0	0
Total assets	638,825	390,225
Liabilities and Equity:
Senior unsecured notes payable, net	254,229	253,165
Mortgage notes payable, net	0	0
Unsecured revolving credit facility	45,000
Accounts payable and accrued liabilities	6,258	3,067
Dividends payable	0	0
Intercompany	63,346	16,585
Total liabilities	368,833	272,817
Equity:
Common stock	0	0
Additional paid-in capital	266,929	125,551
Cumulative distributions in excess of earnings	3,063	(8,143)
Total equity	269,992	117,408
Total liabilities and equity	638,825	390,225
Reportable Legal Entities [Member] | Combined Subsidiary Guarantors [Member]
Assets:
Real estate investments, net	348,454	366,199
Other real estate investments	8,477	7,532
Cash and cash equivalents	0	0	895	735
Accounts receivable	1,695	2,170
Prepaid expenses and other assets	4	1
Deferred financing costs, net	0	0
Investment in subsidiaries	0	0
Intercompany	59,160	15,262
Total assets	417,790	391,164
Liabilities and Equity:
Senior unsecured notes payable, net	0	0
Mortgage notes payable, net	0	557
Unsecured revolving credit facility	0
Accounts payable and accrued liabilities	2,433	3,308
Dividends payable	0	0
Intercompany	0	0
Total liabilities	2,433	3,865
Equity:
Common stock	0	0
Additional paid-in capital	374,660	374,660
Cumulative distributions in excess of earnings	40,697	12,639
Total equity	415,357	387,299
Total liabilities and equity	417,790	391,164
Reportable Legal Entities [Member] | Combined Non-Guarantor Subsidiaries [Member]
Assets:
Real estate investments, net	40,951	43,912
Other real estate investments	0	0
Cash and cash equivalents	0	0	0	$ 0
Accounts receivable	128	121
Prepaid expenses and other assets	0	0
Deferred financing costs, net	0	0
Investment in subsidiaries	0	0
Intercompany	4,186	1,323
Total assets	45,265	45,356
Liabilities and Equity:
Senior unsecured notes payable, net	0	0
Mortgage notes payable, net	94,676	97,051
Unsecured revolving credit facility	0
Accounts payable and accrued liabilities	578	584
Dividends payable	0	0
Intercompany	0	0
Total liabilities	95,254	97,635
Equity:
Common stock	0	0
Additional paid-in capital	(52,899)	(52,899)
Cumulative distributions in excess of earnings	2,910	620
Total equity	(49,989)	(52,279)
Total liabilities and equity	45,265	45,356
Elimination [Member]
Assets:
Real estate investments, net	0	0
Other real estate investments	0	0
Cash and cash equivalents	0	0	$ 0
Accounts receivable	0	0
Prepaid expenses and other assets	0	0
Deferred financing costs, net	0	0
Investment in subsidiaries	(635,360)	(452,428)
Intercompany	(63,346)	(16,585)
Total assets	(698,706)	(469,013)
Liabilities and Equity:
Senior unsecured notes payable, net	0	0
Mortgage notes payable, net	0	0
Unsecured revolving credit facility	0
Accounts payable and accrued liabilities	0	0
Dividends payable	0	0
Intercompany	(63,346)	(16,585)
Total liabilities	(63,346)	(16,585)
Equity:
Common stock	0	0
Additional paid-in capital	(588,690)	(447,312)
Cumulative distributions in excess of earnings	(46,670)	(5,116)
Total equity	(635,360)	(452,428)
Total liabilities and equity	$ (698,706)	$ (469,013)