Schedule III - Real Estate and Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 117,591
Acquisition Costs, Buildings and Improvements	181,275
Costs Capitalized Subsequent to Acquisition, Land	(95)
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	329,179
Gross Amount at Which Carried at Close of Period , Land	117,496
Gross Amount at Which Carried at Close of Period, Building and Improvements	510,454
Gross Amount at Which Carried at Close of Period, Total	627,950	$ 1,341,849	$ 1,851,082	$ 2,053,078
Accumulated Depreciation	(43,634)	$ (124,131)	$ (154,971)	$ (142,206)
North Little Rock, AR [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	1,288
Acquisition Costs, Buildings and Improvements	2,881
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	2,836
Gross Amount at Which Carried at Close of Period , Land	1,288
Gross Amount at Which Carried at Close of Period, Building and Improvements	5,717
Gross Amount at Which Carried at Close of Period, Total	7,005
Accumulated Depreciation	$ (1,060)
Date Acquired	2015-07
Mesa/East, AZ [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 2,661
Acquisition Costs, Buildings and Improvements	2,559
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(642)
Gross Amount at Which Carried at Close of Period , Land	2,661
Gross Amount at Which Carried at Close of Period, Building and Improvements	1,917
Gross Amount at Which Carried at Close of Period, Total	4,578
Accumulated Depreciation	$ (494)
Date Acquired	2015-07
Yuma, AZ [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 1,485
Acquisition Costs, Buildings and Improvements	1,596
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(401)
Gross Amount at Which Carried at Close of Period , Land	1,485
Gross Amount at Which Carried at Close of Period, Building and Improvements	1,195
Gross Amount at Which Carried at Close of Period, Total	2,680
Accumulated Depreciation	$ (338)
Date Acquired	2015-07
Riverside, CA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 1,054
Acquisition Costs, Buildings and Improvements	494
Gross Amount at Which Carried at Close of Period , Land	1,054
Gross Amount at Which Carried at Close of Period, Building and Improvements	494
Gross Amount at Which Carried at Close of Period, Total	1,548
Accumulated Depreciation	$ (146)
Date Acquired	2015-07
Stand-Alone Location Two - Riverside, CA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 3,343
Acquisition Costs, Buildings and Improvements	2,778
Gross Amount at Which Carried at Close of Period , Land	3,343
Gross Amount at Which Carried at Close of Period, Building and Improvements	2,778
Gross Amount at Which Carried at Close of Period, Total	6,121
Accumulated Depreciation	$ (817)
Date Acquired	2015-07
San Bernardino, CA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 4,131
Acquisition Costs, Buildings and Improvements	2,066
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(780)
Gross Amount at Which Carried at Close of Period , Land	4,131
Gross Amount at Which Carried at Close of Period, Building and Improvements	1,286
Gross Amount at Which Carried at Close of Period, Total	5,417
Accumulated Depreciation	$ (364)
Date Acquired	2015-07
Temecula, CA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 6,098
Acquisition Costs, Buildings and Improvements	2,214
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	13,582
Gross Amount at Which Carried at Close of Period , Land	6,098
Gross Amount at Which Carried at Close of Period, Building and Improvements	15,796
Gross Amount at Which Carried at Close of Period, Total	21,894
Accumulated Depreciation	$ (1,805)
Date Acquired	2015-07
Boca Raton, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 16,089
Acquisition Costs, Buildings and Improvements	7,480
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(515)
Gross Amount at Which Carried at Close of Period , Land	16,089
Gross Amount at Which Carried at Close of Period, Building and Improvements	6,965
Gross Amount at Which Carried at Close of Period, Total	23,054
Accumulated Depreciation	$ (1,910)
Date Acquired	2015-07
Clearwater/Cntrysd, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 5,852
Acquisition Costs, Buildings and Improvements	17,777
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	182
Gross Amount at Which Carried at Close of Period , Land	5,852
Gross Amount at Which Carried at Close of Period, Building and Improvements	17,959
Gross Amount at Which Carried at Close of Period, Total	23,811
Accumulated Depreciation	$ (4,964)
Date Acquired	2015-07
Doral(Miami), FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 9,214
Acquisition Costs, Buildings and Improvements	2,654
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(600)
Gross Amount at Which Carried at Close of Period , Land	9,214
Gross Amount at Which Carried at Close of Period, Building and Improvements	2,054
Gross Amount at Which Carried at Close of Period, Total	11,268
Accumulated Depreciation	$ (563)
Date Acquired	2015-07
FtMyers, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 3,168
Acquisition Costs, Buildings and Improvements	2,853
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(418)
Gross Amount at Which Carried at Close of Period , Land	3,168
Gross Amount at Which Carried at Close of Period, Building and Improvements	2,435
Gross Amount at Which Carried at Close of Period, Total	5,603
Accumulated Depreciation	$ (693)
Date Acquired	2015-07
Miami, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 13,264
Acquisition Costs, Buildings and Improvements	61,577
Costs Capitalized Subsequent to Acquisition, Land	(5,022)
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	135,191
Gross Amount at Which Carried at Close of Period , Land	8,242
Gross Amount at Which Carried at Close of Period, Building and Improvements	196,768
Gross Amount at Which Carried at Close of Period, Total	205,010
Accumulated Depreciation	$ (5,366)
Date Acquired	2015-07
Panama City, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 3,227
Acquisition Costs, Buildings and Improvements	1,614
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(461)
Gross Amount at Which Carried at Close of Period , Land	3,227
Gross Amount at Which Carried at Close of Period, Building and Improvements	1,153
Gross Amount at Which Carried at Close of Period, Total	4,380
Accumulated Depreciation	$ (316)
Date Acquired	2015-07
Plantation, FL [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 6,933
Acquisition Costs, Buildings and Improvements	2,509
Costs Capitalized Subsequent to Acquisition, Land	(3,360)
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(1,641)
Gross Amount at Which Carried at Close of Period , Land	3,573
Gross Amount at Which Carried at Close of Period, Building and Improvements	868
Gross Amount at Which Carried at Close of Period, Total	4,441
Accumulated Depreciation	$ (366)
Date Acquired	2015-07
Cedar Rapids, IA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 2,833
Acquisition Costs, Buildings and Improvements	2,197
Costs Capitalized Subsequent to Acquisition, Land	(1,841)
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(790)
Gross Amount at Which Carried at Close of Period , Land	992
Gross Amount at Which Carried at Close of Period, Building and Improvements	1,407
Gross Amount at Which Carried at Close of Period, Total	2,399
Accumulated Depreciation	$ (533)
Date Acquired	2015-07
Braintree, MA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 6,585
Acquisition Costs, Buildings and Improvements	5,614
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	14,596
Gross Amount at Which Carried at Close of Period , Land	6,585
Gross Amount at Which Carried at Close of Period, Building and Improvements	20,210
Gross Amount at Which Carried at Close of Period, Total	26,795
Accumulated Depreciation	$ (4,352)
Date Acquired	2015-07
Edgewater, MD [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 5,534
Acquisition Costs, Buildings and Improvements	2,116
Costs Capitalized Subsequent to Acquisition, Land	(1,429)
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(970)
Gross Amount at Which Carried at Close of Period , Land	4,105
Gross Amount at Which Carried at Close of Period, Building and Improvements	1,146
Gross Amount at Which Carried at Close of Period, Total	5,251
Accumulated Depreciation	$ (358)
Date Acquired	2015-07
Watchung NJ [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 6,704
Acquisition Costs, Buildings and Improvements	4,110
Costs Capitalized Subsequent to Acquisition, Land	(1,945)
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	26,612
Gross Amount at Which Carried at Close of Period , Land	4,759
Gross Amount at Which Carried at Close of Period, Building and Improvements	30,722
Gross Amount at Which Carried at Close of Period, Total	35,481
Accumulated Depreciation	$ (3,881)
Date Acquired	2015-07
Albany, NY [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 8,289
Acquisition Costs, Buildings and Improvements	6,523
Costs Capitalized Subsequent to Acquisition, Land	(1,012)
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	10,194
Gross Amount at Which Carried at Close of Period , Land	7,277
Gross Amount at Which Carried at Close of Period, Building and Improvements	16,717
Gross Amount at Which Carried at Close of Period, Total	23,994
Accumulated Depreciation	$ (3,491)
Date Acquired	2015-07
King of Prussia, PA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Buildings and Improvements	$ 42,300
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	1,168
Gross Amount at Which Carried at Close of Period, Building and Improvements	43,468
Gross Amount at Which Carried at Close of Period, Total	43,468
Accumulated Depreciation	$ (11,086)
Date Acquired	2015-07
Valley View, TX [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 4,706
Acquisition Costs, Buildings and Improvements	3,230
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(3,230)
Gross Amount at Which Carried at Close of Period , Land	4,706
Gross Amount at Which Carried at Close of Period, Total	$ 4,706
Date Acquired	2015-07
Redmond-Overlake Pk, WA [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Acquisition Costs, Land	$ 5,133
Acquisition Costs, Buildings and Improvements	4,133
Costs Capitalized Subsequent to Acquisition, Land	14,514
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	(1,552)
Gross Amount at Which Carried at Close of Period , Land	19,647
Gross Amount at Which Carried at Close of Period, Building and Improvements	2,581
Gross Amount at Which Carried at Close of Period, Total	22,228
Accumulated Depreciation	$ (731)
Date Acquired	2015-07
Various [Member]
SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]
Costs Capitalized Subsequent to Acquisition, Buildings and Improvements	$ 136,818
Gross Amount at Which Carried at Close of Period, Building and Improvements	136,818
Gross Amount at Which Carried at Close of Period, Total	$ 136,818